# BackblazeB2 Component The BackblazeB2 component offers an easy to use interface for Backblaze's B2 Cloud Storage service. ## Syntax ```text nsoftware.CloudStorage.BackblazeB2 ``` ## Remarks The BackblazeB2 component provides an easy-to-use API for the Backblaze B2 Cloud Storage service. Capabilities include uploading and downloading files, bucket management, strong encryption support, and more. ## Authentication Authentication works by exchanging a known *application key* (which consists of a key Id and the key string itself) for an authorization token which is then used to authorize all further requests. The authentication process also returns information about the account, the capabilities and restrictions associated with the application key, and other details that help the component interact with the Backblaze B2 API. To authenticate the component with the server, supply an application key using the [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) and [ApplicationKey](#applicationkey-property-backblazeb2-component) properties, and then call [Authorize](#authorize-method-backblazeb2-component). This will populate the [Account](#account-property-backblazeb2-component) property with the aforementioned information, including the [Account](#account-property-backblazeb2-component).[AuthToken](#B2Account_f_AuthToken). Eventually, the authorization token returned during the authentication process will expire, at which point it should be exchanged for a new one by calling [Authorize](#authorize-method-backblazeb2-component) again. ## Usage Once authenticated, you can start interacting with the Backblaze B2 Cloud Storage service. The following list shows some of the methods used to accomplish common tasks: - Bucket management: [ListBuckets](#listbuckets-method-backblazeb2-component), [GetBucketInfo](#getbucketinfo-method-backblazeb2-component), [CreateBucket](#createbucket-method-backblazeb2-component), [UpdateBucket](#updatebucket-method-backblazeb2-component), [DeleteBucket](#deletebucket-method-backblazeb2-component) - File management: [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), [GetFileInfo](#getfileinfo-method-backblazeb2-component), [UploadFile](#uploadfile-method-backblazeb2-component), [CopyFile](#copyfile-method-backblazeb2-component), [DownloadFile](#downloadfile-method-backblazeb2-component), [DownloadFileById](#downloadfilebyid-method-backblazeb2-component), [HideFile](#hidefile-method-backblazeb2-component), [DeleteFile](#deletefile-method-backblazeb2-component), [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) - Multipart uploads: [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component), [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component), [ListParts](#listparts-method-backblazeb2-component), [UploadPart](#uploadpart-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component) - Application key management: [ListAppKeys](#listappkeys-method-backblazeb2-component), [CreateAppKey](#createappkey-method-backblazeb2-component), [DeleteAppKey](#deleteappkey-method-backblazeb2-component) - Sharing files: [GetDownloadAuthToken](#getdownloadauthtoken-method-backblazeb2-component) Refer to the complete API, below, for more information. ## Property List *The following is the full list of the properties of the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [Account](#account-property-backblazeb2-component) | Details about the account and restrictions associated with currently-authenticated application key. | | [AppKeyMarker](#appkeymarker-property-backblazeb2-component) | A marker indicating what page of application keys to return next. | | [AppKeys](#appkeys-property-backblazeb2-component) | A collection of application keys. | | [ApplicationKey](#applicationkey-property-backblazeb2-component) | The application key to use for authentication. | | [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) | The application key Id to use for authentication. | | [Buckets](#buckets-property-backblazeb2-component) | A collection of buckets. | | [ContentType](#contenttype-property-backblazeb2-component) | The content type to send for a file. | | [Delimiter](#delimiter-property-backblazeb2-component) | The delimiter string to use when listing files. | | [EncryptionAlgorithm](#encryptionalgorithm-property-backblazeb2-component) | The encryption algorithm. | | [EncryptionPassword](#encryptionpassword-property-backblazeb2-component) | The encryption password. | | [FileData](#filedata-property-backblazeb2-component) | The data that was downloaded, or that should be uploaded. | | [FileMarker](#filemarker-property-backblazeb2-component) | A marker indicating what page of files to return next. | | [Files](#files-property-backblazeb2-component) | A collection of files. | | [Firewall](#firewall-property-backblazeb2-component) | A set of properties related to firewall access. | | [Idle](#idle-property-backblazeb2-component) | The current status of the component. | | [LocalFile](#localfile-property-backblazeb2-component) | The location of the local file. | | [LocalHost](#localhost-property-backblazeb2-component) | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. | | [Metadata](#metadata-property-backblazeb2-component) | A collection of metadata items. | | [OtherHeaders](#otherheaders-property-backblazeb2-component) | Other headers as determined by the user (optional). | | [Overwrite](#overwrite-property-backblazeb2-component) | Determines if local files are overwritten. | | [ParsedHeaders](#parsedheaders-property-backblazeb2-component) | This property includes a collection of headers returned from the last request. | | [PartMarker](#partmarker-property-backblazeb2-component) | A marker indicating what page of parts to return next. | | [Parts](#parts-property-backblazeb2-component) | A collection of multipart upload parts. | | [Prefix](#prefix-property-backblazeb2-component) | A prefix used to restrict the results returned when listing files. | | [Proxy](#proxy-property-backblazeb2-component) | A set of properties related to proxy access. | | [QueryParams](#queryparams-property-backblazeb2-component) | Additional query parameters to be included in the request. | | [Range](#range-property-backblazeb2-component) | The range of bytes to request. | | [SSLAcceptServerCert](#sslacceptservercert-property-backblazeb2-component) | Instructs the component to unconditionally accept the server certificate that matches the supplied certificate. | | [SSLCert](#sslcert-property-backblazeb2-component) | The certificate to be used during Secure Sockets Layer (SSL) negotiation. | | [SSLProvider](#sslprovider-property-backblazeb2-component) | The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use. | | [SSLServerCert](#sslservercert-property-backblazeb2-component) | The server certificate for the last established connection. | | [StartByte](#startbyte-property-backblazeb2-component) | The byte offset from which to resume the upload or download. | | [Timeout](#timeout-property-backblazeb2-component) | The timeout for the component. | | [VersionMarker](#versionmarker-property-backblazeb2-component) | A marker indicating what page of file versions to return next. | ## Method List *The following is the full list of the methods of the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component) | Aborts a multipart upload. | | [AddMetadata](#addmetadata-method-backblazeb2-component) | Adds a metadata item to the Metadata properties. | | [AddQueryParam](#addqueryparam-method-backblazeb2-component) | Adds a query parameter to the QueryParams properties. | | [Authorize](#authorize-method-backblazeb2-component) | Authenticates the component with the server using the current application key and Id. | | [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component) | Completes a multipart upload by assembling the previously uploaded parts. | | [Config](#config-method-backblazeb2-component) | Sets or retrieves a configuration setting. | | [CopyFile](#copyfile-method-backblazeb2-component) | Copies a file. | | [CopyPart](#copypart-method-backblazeb2-component) | Copies the specified file as part of a multipart upload. | | [CreateAppKey](#createappkey-method-backblazeb2-component) | Creates a new application key. | | [CreateBucket](#createbucket-method-backblazeb2-component) | Creates a new bucket. | | [DeleteAppKey](#deleteappkey-method-backblazeb2-component) | Deletes an application key. | | [DeleteBucket](#deletebucket-method-backblazeb2-component) | Deletes a bucket. | | [DeleteFile](#deletefile-method-backblazeb2-component) | Deletes all versions of a file. | | [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) | Deletes a file version. | | [DownloadFile](#downloadfile-method-backblazeb2-component) | Downloads a file by name. | | [DownloadFileById](#downloadfilebyid-method-backblazeb2-component) | Downloads a file by Id. | | [GetBucketInfo](#getbucketinfo-method-backblazeb2-component) | Gets a bucket's information and metadata. | | [GetDownloadAuthToken](#getdownloadauthtoken-method-backblazeb2-component) | Create a download authorization token for one or more files in a bucket. | | [GetFileInfo](#getfileinfo-method-backblazeb2-component) | Gets a file's information and metadata. | | [HideFile](#hidefile-method-backblazeb2-component) | Hides a file. | | [Interrupt](#interrupt-method-backblazeb2-component) | This method interrupts the current method. | | [ListAppKeys](#listappkeys-method-backblazeb2-component) | Lists the account's application keys. | | [ListBuckets](#listbuckets-method-backblazeb2-component) | Lists all buckets in the account. | | [ListFiles](#listfiles-method-backblazeb2-component) | Lists the files in a bucket. | | [ListFileVersions](#listfileversions-method-backblazeb2-component) | Lists the file versions in a bucket. | | [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) | Lists the in-progress multipart uploads in a bucket. | | [ListParts](#listparts-method-backblazeb2-component) | Lists a multipart upload's parts. | | [Reset](#reset-method-backblazeb2-component) | Resets the component to its initial state. | | [SendCustomRequest](#sendcustomrequest-method-backblazeb2-component) | Sends a custom request to the Backblaze B2 API. | | [SetDownloadStream](#setdownloadstream-method-backblazeb2-component) | Sets the stream to which downloaded data will be written. | | [SetUploadStream](#setuploadstream-method-backblazeb2-component) | Sets the stream from which data is read when uploading. | | [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component) | Starts a new multipart upload. | | [UpdateBucket](#updatebucket-method-backblazeb2-component) | Updates a bucket's kind and/or metadata. | | [UploadFile](#uploadfile-method-backblazeb2-component) | Uploads a file. | | [UploadPart](#uploadpart-method-backblazeb2-component) | Uploads a multipart upload part. | ## Event List *The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [AppKeyList](#appkeylist-event-backblazeb2-component) | Fires once for each application key returned when listing application keys. | | [BucketList](#bucketlist-event-backblazeb2-component) | Fires once for each bucket returned when listing buckets. | | [EndTransfer](#endtransfer-event-backblazeb2-component) | Fired when a document finishes transferring. | | [Error](#error-event-backblazeb2-component) | Fired when information is available about errors during data delivery. | | [FileList](#filelist-event-backblazeb2-component) | Fires once for each file returned when listing files. | | [FragmentComplete](#fragmentcomplete-event-backblazeb2-component) | Fires after each part in an automatic multipart upload is complete. | | [Header](#header-event-backblazeb2-component) | Fired every time a header line comes in. | | [Log](#log-event-backblazeb2-component) | Fired once for each log message. | | [MetadataList](#metadatalist-event-backblazeb2-component) | Fires once for each metadata item returned when bucket or file information and metadata is retrieved. | | [PartList](#partlist-event-backblazeb2-component) | Fires once for each part returned when listing a multipart upload's parts. | | [Progress](#progress-event-backblazeb2-component) | Fires during an upload or download to indicate transfer progress. | | [SSLServerAuthentication](#sslserverauthentication-event-backblazeb2-component) | Fired after the server presents its certificate to the client. | | [SSLStatus](#sslstatus-event-backblazeb2-component) | Fired when secure connection progress messages are available. | | [StartTransfer](#starttransfer-event-backblazeb2-component) | Fired when a document starts transferring (after the headers). | | [Transfer](#transfer-event-backblazeb2-component) | Fired while a document transfers (delivers document). | ## Config Settings *The following is a list of config settings for the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [AccumulatePages](#AccumulatePages) | Whether the component should accumulate subsequent pages of results when listing them. | | [APIURL](#APIURL) | The base URL used for all except download and upload requests. | | [APIVersion](#APIVersion) | The Backblaze B2 REST API version being used by the component. | | [ClientModifiedTime](#ClientModifiedTime) | The client-side last modified time. | | [DownloadAuthToken](#DownloadAuthToken) | The download authorization token to use. | | [DownloadTempFile](#DownloadTempFile) | The temporary file used when downloading encrypted data. | | [DownloadURL](#DownloadURL) | The base URL used for download requests. | | [EncryptionIV](#EncryptionIV) | The initialization vector to be used for encryption/decryption. | | [EncryptionKey](#EncryptionKey) | The key to use during encryption/decryption. | | [EncryptionPasswordKDF](#EncryptionPasswordKDF) | The KDF algorithm to use during password based encryption and decryption. | | [FragmentSize](#FragmentSize) | The part size to use when uploading a new file. | | [IfRevision](#IfRevision) | The revision number that the bucket must currently have in order for a request to succeed. | | [ListWithMetadata](#ListWithMetadata) | Whether to include metadata items when listing buckets, files, etc. | | [MaxAppKeyResults](#MaxAppKeyResults) | The maximum number of results to return when listing application keys. | | [MaxPartResults](#MaxPartResults) | The maximum number of results to return when listing parts. | | [MaxResults](#MaxResults) | The maximum number of results to return when listing files or file versions. | | [ProgressAbsolute](#ProgressAbsolute) | Whether the component should track transfer progress absolutely. | | [ProgressStep](#ProgressStep) | How often the progress event should be fired, in terms of percentage. | | [RawRequest](#RawRequest) | Returns the data that was sent to the server. | | [RawResponse](#RawResponse) | Returns the data that was received from the server. | | [ResumableUploadState](#ResumableUploadState) | Tracks upload state information during an automatic multipart upload. | | [SendMetadataOnCopy](#SendMetadataOnCopy) | Whether to send metadata items when copying files. | | [SimpleUploadLimit](#SimpleUploadLimit) | The maximum data size the component should attempt to upload directly when creating a file. | | [TempPath](#TempPath) | The path to the directory where temporary files are created. | | [XChildCount](#XChildCount) | The number of child elements of the current element. | | [XChildName\[i\]](#XChildName[i]) | The name of the child element. | | [XChildXText\[i\]](#XChildXText[i]) | The inner text of the child element. | | [XElement](#XElement) | The name of the current element. | | [XParent](#XParent) | The parent of the current element. | | [XPath](#XPath) | Provides a way to point to a specific element in the returned XML or JSON response. | | [XSubTree](#XSubTree) | A snapshot of the current element in the document. | | [XText](#XText) | The text of the current element. | | [AcceptEncoding](#AcceptEncoding) | Used to tell the server which types of content encodings the client supports. | | [AllowHTTPCompression](#AllowHTTPCompression) | This property enables HTTP compression for receiving data. | | [AllowHTTPFallback](#AllowHTTPFallback) | Whether HTTP/2 connections are permitted to fallback to HTTP/1.1. | | [AllowNTLMFallback](#AllowNTLMFallback) | Whether to allow fallback from Negotiate to NTLM when authenticating. | | [Append](#Append) | Whether to append data to LocalFile. | | [Authorization](#Authorization) | The Authorization string to be sent to the server. | | [BytesTransferred](#BytesTransferred) | Contains the number of bytes transferred in the response data. | | [ChunkSize](#ChunkSize) | Specifies the chunk size in bytes when using chunked encoding. | | [CompressHTTPRequest](#CompressHTTPRequest) | Set to true to compress the body of a PUT or POST request. | | [EncodeURL](#EncodeURL) | If set to True the URL will be encoded by the component. | | [FollowRedirects](#FollowRedirects) | Determines what happens when the server issues a redirect. | | [GetOn302Redirect](#GetOn302Redirect) | If set to True the component will perform a GET on the new location. | | [HTTP2HeadersWithoutIndexing](#HTTP2HeadersWithoutIndexing) | HTTP2 headers that should not update the dynamic header table with incremental indexing. | | [HTTPVersion](#HTTPVersion) | The version of HTTP used by the component. | | [IfModifiedSince](#IfModifiedSince) | A date determining the maximum age of the desired document. | | [KeepAlive](#KeepAlive) | Determines whether the HTTP connection is closed after completion of the request. | | [KerberosSPN](#KerberosSPN) | The Service Principal Name for the Kerberos Domain Controller. | | [LogLevel](#LogLevel) | The level of detail that is logged. | | [MaxHeaders](#MaxHeaders) | Instructs component to save the amount of headers specified that are returned by the server after a Header event has been fired. | | [MaxHTTPCookies](#MaxHTTPCookies) | Instructs component to save the amount of cookies specified that are returned by the server when a SetCookie event is fired. | | [MaxRedirectAttempts](#MaxRedirectAttempts) | Limits the number of redirects that are followed in a request. | | [NegotiatedHTTPVersion](#NegotiatedHTTPVersion) | The negotiated HTTP version. | | [OtherHeaders](#OtherHeaders) | Other headers as determined by the user (optional). | | [ProxyAuthorization](#ProxyAuthorization) | The authorization string to be sent to the proxy server. | | [ProxyAuthScheme](#ProxyAuthScheme) | The authorization scheme to be used for the proxy. | | [ProxyPassword](#ProxyPassword) | A password if authentication is to be used for the proxy. | | [ProxyPort](#ProxyPort) | Port for the proxy server (default 80). | | [ProxyServer](#ProxyServer) | Name or IP address of a proxy server (optional). | | [ProxyUser](#ProxyUser) | A user name if authentication is to be used for the proxy. | | [SentHeaders](#SentHeaders) | The full set of headers as sent by the client. | | [StatusCode](#StatusCode) | The status code of the last response from the server. | | [StatusLine](#StatusLine) | The first line of the last response from the server. | | [TransferredData](#TransferredData) | The contents of the last response from the server. | | [TransferredDataLimit](#TransferredDataLimit) | The maximum number of incoming bytes to be stored by the component. | | [TransferredHeaders](#TransferredHeaders) | The full set of headers as received from the server. | | [TransferredRequest](#TransferredRequest) | The full request as sent by the client. | | [UseChunkedEncoding](#UseChunkedEncoding) | Enables or Disables HTTP chunked encoding for transfers. | | [UseIDNs](#UseIDNs) | Whether to encode hostnames to internationalized domain names. | | [UsePlatformDeflate](#UsePlatformDeflate) | Whether to use the platform implementation to decompress compressed responses. | | [UsePlatformHTTPClient](#UsePlatformHTTPClient) | Whether or not to use the platform HTTP client. | | [UseProxyAutoConfigURL](#UseProxyAutoConfigURL) | Whether to use a Proxy auto-config file when attempting a connection. | | [UserAgent](#UserAgent) | Information about the user agent (browser). | | [CloseStreamAfterTransfer](#CloseStreamAfterTransfer) | If true, the component will close the upload or download stream after the transfer. | | [ConnectionTimeout](#ConnectionTimeout) | Sets a separate timeout value for establishing a connection. | | [FirewallAutoDetect](#FirewallAutoDetect) | Tells the component whether or not to automatically detect and use firewall system settings, if available. | | [FirewallHost](#FirewallHost) | Name or IP address of firewall (optional). | | [FirewallHTTPVersion](#FirewallHTTPVersion) | The HTTP version to be used when connecting through a tunneling proxy. | | [FirewallListener](#FirewallListener) | If true, the component binds to a SOCKS firewall as a server (TCPClient only). | | [FirewallPassword](#FirewallPassword) | Password to be used if authentication is to be used when connecting through the firewall. | | [FirewallPort](#FirewallPort) | The TCP port for the FirewallHost;. | | [FirewallType](#FirewallType) | Determines the type of firewall to connect through. | | [FirewallUser](#FirewallUser) | A user name if authentication is to be used connecting through a firewall. | | [KeepAliveInterval](#KeepAliveInterval) | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. | | [KeepAliveTime](#KeepAliveTime) | The inactivity time in milliseconds before a TCP keep-alive packet is sent. | | [Linger](#Linger) | When set to True, connections are terminated gracefully. | | [LingerTime](#LingerTime) | Time in seconds to have the connection linger. | | [LocalHost](#LocalHost) | The name of the local host through which connections are initiated or accepted. | | [LocalPort](#LocalPort) | The port in the local host where the component binds. | | [MaxLineLength](#MaxLineLength) | The maximum amount of data to accumulate when no EOL is found. | | [MaxTransferRate](#MaxTransferRate) | The transfer rate limit in bytes per second. | | [ProxyExceptionsList](#ProxyExceptionsList) | A semicolon separated list of hosts and IPs to bypass when using a proxy. | | [TCPKeepAlive](#TCPKeepAlive) | Determines whether or not the keep alive socket option is enabled. | | [TcpNoDelay](#TcpNoDelay) | Whether or not to delay when sending packets. | | [UseIPv6](#UseIPv6) | Whether to use IPv6. | | [UseNTLMv2](#UseNTLMv2) | Whether to use NTLM V2. | | [CACertFilePaths](#CACertFilePaths) | The paths to CA certificate files when using Mono on Unix/Linux. | | [LogSSLPackets](#LogSSLPackets) | Controls whether SSL packets are logged when using the internal security API. | | [ReuseSSLSession](#ReuseSSLSession) | Determines if the SSL session is reused. | | [SSLCACerts](#SSLCACerts) | A newline separated list of CA certificates to be included when performing an SSL handshake. | | [SSLCheckCRL](#SSLCheckCRL) | Whether to check the Certificate Revocation List for the server certificate. | | [SSLCheckOCSP](#SSLCheckOCSP) | Whether to use OCSP to check the status of the server certificate. | | [SSLCipherStrength](#SSLCipherStrength) | The minimum cipher strength used for bulk encryption. | | [SSLClientCACerts](#SSLClientCACerts) | A newline separated list of CA certificates to use during SSL client certificate validation. | | [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) | The cipher suite to be used in an SSL negotiation. | | [SSLEnabledProtocols](#SSLEnabledProtocols) | Used to enable/disable the supported security protocols. | | [SSLEnableRenegotiation](#SSLEnableRenegotiation) | Whether the renegotiation_info SSL extension is supported. | | [SSLIncludeCertChain](#SSLIncludeCertChain) | Whether the entire certificate chain is included in the SSLServerAuthentication event. | | [SSLKeyLogFile](#SSLKeyLogFile) | The location of a file where per-session secrets are written for debugging purposes. | | [SSLNegotiatedCipher](#SSLNegotiatedCipher) | Returns the negotiated cipher suite. | | [SSLNegotiatedCipherStrength](#SSLNegotiatedCipherStrength) | Returns the negotiated cipher suite strength. | | [SSLNegotiatedCipherSuite](#SSLNegotiatedCipherSuite) | Returns the negotiated cipher suite. | | [SSLNegotiatedKeyExchange](#SSLNegotiatedKeyExchange) | Returns the negotiated key exchange algorithm. | | [SSLNegotiatedKeyExchangeStrength](#SSLNegotiatedKeyExchangeStrength) | Returns the negotiated key exchange algorithm strength. | | [SSLNegotiatedVersion](#SSLNegotiatedVersion) | Returns the negotiated protocol version. | | [SSLSecurityFlags](#SSLSecurityFlags) | Flags that control certificate verification. | | [SSLServerCACerts](#SSLServerCACerts) | A newline separated list of CA certificates to use during SSL server certificate validation. | | [TLS12SignatureAlgorithms](#TLS12SignatureAlgorithms) | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. | | [TLS12SupportedGroups](#TLS12SupportedGroups) | The supported groups for ECC. | | [TLS13KeyShareGroups](#TLS13KeyShareGroups) | The groups for which to pregenerate key shares. | | [TLS13SignatureAlgorithms](#TLS13SignatureAlgorithms) | The allowed certificate signature algorithms. | | [TLS13SupportedGroups](#TLS13SupportedGroups) | The supported groups for (EC)DHE key exchange. | | [AbsoluteTimeout](#AbsoluteTimeout) | Determines whether timeouts are inactivity timeouts or absolute timeouts. | | [FirewallData](#FirewallData) | Used to send extra data to the firewall. | | [InBufferSize](#InBufferSize) | The size in bytes of the incoming queue of the socket. | | [OutBufferSize](#OutBufferSize) | The size in bytes of the outgoing queue of the socket. | | [BuildInfo](#BuildInfo) | Information about the product's build. | | [GUIAvailable](#GUIAvailable) | Whether or not a message loop is available for processing events. | | [LicenseInfo](#LicenseInfo) | Information about the current license. | | [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. | | [UseFIPSCompliantAPI](#UseFIPSCompliantAPI) | Tells the component whether or not to use FIPS certified APIs. | | [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. | # Account Property ([BackblazeB2](#backblazeb2-component) Component) Details about the account and restrictions associated with currently-authenticated application key. ## Syntax ```text public B2Account Account { get; } ``` ## Remarks This property holds an [B2Account](#b2account-type) object with information about the account and restrictions associated with the currently-authenticated application key; it's populated after calling [Authorize](#authorize-method-backblazeb2-component). This property is read-only and not available at design time. Please refer to the [B2Account](#b2account-type) type for a complete list of fields. # AppKeyMarker Property ([BackblazeB2](#backblazeb2-component) Component) A marker indicating what page of application keys to return next. ## Syntax ```text public string AppKeyMarker { get; set; } ``` ## Default Value "" ## Remarks This property will be populated when [ListAppKeys](#listappkeys-method-backblazeb2-component) is called if the results are paged and there are more pages. To list all application keys, continue to call [ListAppKeys](#listappkeys-method-backblazeb2-component) until this property returns empty string. Refer to [ListAppKeys](#listappkeys-method-backblazeb2-component) for more information. This property is not available at design time. # AppKeys Property ([BackblazeB2](#backblazeb2-component) Component) A collection of application keys. ## Syntax ```text public B2AppKeyList AppKeys { get; } ``` ## Remarks This collection holds a list of [B2AppKey](#b2appkey-type) items. Calling [ListAppKeys](#listappkeys-method-backblazeb2-component) will populate this collection. This property is read-only and not available at design time. Please refer to the [B2AppKey](#b2appkey-type) type for a complete list of fields. # ApplicationKey Property ([BackblazeB2](#backblazeb2-component) Component) The application key to use for authentication. ## Syntax ```text public string ApplicationKey { get; set; } ``` ## Default Value "" ## Remarks This property specifies the application key that should be used for authentication. Both this property and [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) must be set before attempting any operations which connect to the server. # ApplicationKeyId Property ([BackblazeB2](#backblazeb2-component) Component) The application key Id to use for authentication. ## Syntax ```text public string ApplicationKeyId { get; set; } ``` ## Default Value "" ## Remarks This property specifies the application key Id that should be used for authentication. Both this property and [ApplicationKey](#applicationkey-property-backblazeb2-component) must be set before attempting any operations which connect to the server. # Buckets Property ([BackblazeB2](#backblazeb2-component) Component) A collection of buckets. ## Syntax ```text public B2BucketList Buckets { get; } ``` ## Remarks This collection holds a list of [B2Bucket](#b2bucket-type) items. Calling [ListBuckets](#listbuckets-method-backblazeb2-component) will populate this collection. This property is read-only and not available at design time. Please refer to the [B2Bucket](#b2bucket-type) type for a complete list of fields. # ContentType Property ([BackblazeB2](#backblazeb2-component) Component) The content type to send for a file. ## Syntax ```text public string ContentType { get; set; } ``` ## Default Value "" ## Remarks This property can be set before calling [UploadFile](#uploadfile-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), or (if the [SendMetadataOnCopy](#SendMetadataOnCopy) configuration setting is enabled) [CopyFile](#copyfile-method-backblazeb2-component) to have its value submitted as the file's *Content-Type* header value. If this property is empty, the component will send *b2/x-auto*, which instructs the server to automatically determine the content type based on the file's extension (or set it to *application/octet-stream* if it cannot). This property is not available at design time. # Delimiter Property ([BackblazeB2](#backblazeb2-component) Component) The delimiter string to use when listing files. ## Syntax ```text public string Delimiter { get; set; } ``` ## Default Value "" ## Remarks If this property is non-empty when [ListFiles](#listfiles-method-backblazeb2-component) or [ListFileVersions](#listfileversions-method-backblazeb2-component) is called, any items whose names contain the same string between the specified [Prefix](#prefix-property-backblazeb2-component) and the first occurrence of the specified delimiter that follow will be rolled up into a virtual "folder" element, which is returned in place of the individual files themselves. If a particular item is a "folder" instead of an actual file or file version, then the [Files](#files-property-backblazeb2-component).[Kind](#B2File_f_Kind) field will be set to *folder*. The same is also true of the [FileList](#filelist-event-backblazeb2-component) event's *Kind* parameter. ### File Hierarchy Traversal By using the Delimiter and [Prefix](#prefix-property-backblazeb2-component) properties in tandem, applications can effectively "traverse" a virtual hierarchy of files (or file versions) as if it were a filesystem. For example, assume that files with the following names exist within a bucket: - *MyCompany* - *MyCompany/Department1* - *MyCompany/Department2* - *MyCompany/Department2/EmployeeA* - *MyCompany/Department2/EmployeeB* With Delimiter set to */*, we can set [Prefix](#prefix-property-backblazeb2-component) to successively "deeper" values before calling [ListFiles](#listfiles-method-backblazeb2-component) or [ListFileVersions](#listfileversions-method-backblazeb2-component) for the following effect: | [Prefix](#prefix-property-backblazeb2-component) Value | Files Returned | Folders Returned | | --- | --- | --- | | (empty) | MyCompany | MyCompany/ | | MyCompany/ | MyCompany/Department1 MyCompany/Department2 | MyCompany/Department2/ | | MyCompany/Department2/ | MyCompany/Department2/EmployeeA MyCompany/Department2/EmployeeB | (none) | This property is not available at design time. # EncryptionAlgorithm Property ([BackblazeB2](#backblazeb2-component) Component) The encryption algorithm. ## Syntax ```text public BackblazeB2EncryptionAlgorithms EncryptionAlgorithm { get; set; } enum BackblazeB2EncryptionAlgorithms { eaAES, eaBlowfish, eaCAST, eaDES, eaIDEA, eaRC2, eaRC4, eaTEA, eaTripleDES, eaTwofish, eaRijndael, eaChaCha, eaXSalsa20 } ``` ## Default Value 0 ## Remarks This property specifies the encryption algorithm to be used. The maximum allowable key size is automatically used for the selected algorithm. Possible values are: | Algorithm | Key Size | | --- | --- | | 0 (eaAES - default) | 256 | | 1 (eaBlowfish) | 448 | | 2 (eaCAST) | 128 | | 3 (eaDES) | 64 | | 4 (eaIDEA) | 128 | | 5 (eaRC2) | 128 | | 6 (eaRC4) | 2048 | | 7 (eaTEA) | 128 | | 8 (eaTripleDES) | 192 | | 9 (eaTwofish) | 256 | | 10 (eaRijndael) | 256 | | 11 (eaChaCha) | 256 | | 12 (eaXSalsa20) | 256 | # EncryptionPassword Property ([BackblazeB2](#backblazeb2-component) Component) The encryption password. ## Syntax ```text public string EncryptionPassword { get; set; } ``` ## Default Value "" ## Remarks If this property is populated when [UploadFile](#uploadfile-method-backblazeb2-component) or [DownloadFile](#downloadfile-method-backblazeb2-component) is called, the component will attempt to encrypt or decrypt the data before uploading or after downloading it. The component uses the value specified here to generate the necessary encryption Key and IV values using the PKCS5 password digest algorithm. This provides a simpler alternative to creating and managing Key and IV values directly. However, it is also possible to explicitly specify the Key and IV values to use by setting the [EncryptionKey](#EncryptionKey) and [EncryptionIV](#EncryptionIV) configuration settings. This may be necessary if, e.g., the data needs to be encrypted/decrypted by another utility which generates Key and IV values differently. This property is not available at design time. # FileData Property ([BackblazeB2](#backblazeb2-component) Component) The data that was downloaded, or that should be uploaded. ## Syntax ```text public string FileData { get; set; } public byte[] FileDataB { get; set; } ``` ## Default Value "" ## Remarks This property is populated with file data after calling [DownloadFile](#downloadfile-method-backblazeb2-component) or [DownloadFileById](#downloadfilebyid-method-backblazeb2-component) if [SetDownloadStream](#setdownloadstream-method-backblazeb2-component) and [LocalFile](#localfile-property-backblazeb2-component) are not set. This property can also be set before calling [UploadFile](#uploadfile-method-backblazeb2-component) or [UploadPart](#uploadpart-method-backblazeb2-component); its data will be uploaded if [SetUploadStream](#setuploadstream-method-backblazeb2-component) and [LocalFile](#localfile-property-backblazeb2-component) are not set. This property is not available at design time. # FileMarker Property ([BackblazeB2](#backblazeb2-component) Component) A marker indicating what page of files to return next. ## Syntax ```text public string FileMarker { get; set; } ``` ## Default Value "" ## Remarks This property will be populated when [ListFiles](#listfiles-method-backblazeb2-component) or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) is called if the results are paged and there are more pages. To list all files or multipart uploads, continue to call [ListFiles](#listfiles-method-backblazeb2-component) or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) (respectively) until this property returns empty string. Refer to [ListFiles](#listfiles-method-backblazeb2-component) or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) for more information. This property is not available at design time. # Files Property ([BackblazeB2](#backblazeb2-component) Component) A collection of files. ## Syntax ```text public B2FileList Files { get; } ``` ## Remarks This collection holds a list of [B2File](#b2file-type) items. Calling [GetFileInfo](#getfileinfo-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) will populate this collection. This property is read-only and not available at design time. Please refer to the [B2File](#b2file-type) type for a complete list of fields. # Firewall Property ([BackblazeB2](#backblazeb2-component) Component) A set of properties related to firewall access. ## Syntax ```text public Firewall Firewall { get; set; } ``` ## Remarks This is a [Firewall](#firewall-type)-type property, which contains fields describing the firewall through which the component will attempt to connect. Please refer to the [Firewall](#firewall-type) type for a complete list of fields. # Idle Property ([BackblazeB2](#backblazeb2-component) Component) The current status of the component. ## Syntax ```text public bool Idle { get; } ``` ## Default Value True ## Remarks This property will be False if the component is currently busy (communicating or waiting for an answer), and True at all other times. This property is read-only. # LocalFile Property ([BackblazeB2](#backblazeb2-component) Component) The location of the local file. ## Syntax ```text public string LocalFile { get; set; } ``` ## Default Value "" ## Remarks This property specifies the location of a file on disk. This is used as the source file when calling [UploadFile](#uploadfile-method-backblazeb2-component) or [UploadPart](#uploadpart-method-backblazeb2-component); and as the destination file when calling [DownloadFile](#downloadfile-method-backblazeb2-component) or [DownloadFileById](#downloadfilebyid-method-backblazeb2-component). Note: Setting this property to a non-empty value will discard any streams set using [SetDownloadStream](#setdownloadstream-method-backblazeb2-component) and [SetUploadStream](#setuploadstream-method-backblazeb2-component). Similarly, passing a non-null value to either of the aforementioned methods will clear this property. # LocalHost Property ([BackblazeB2](#backblazeb2-component) Component) The name of the local host or user-assigned IP interface through which connections are initiated or accepted. ## Syntax ```text public string LocalHost { get; set; } ``` ## Default Value "" ## Remarks This property contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address. In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used. If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface). NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window. # Metadata Property ([BackblazeB2](#backblazeb2-component) Component) A collection of metadata items. ## Syntax ```text public B2MetadataList Metadata { get; } ``` ## Remarks This collection holds a list of [B2Metadata](#b2metadata-type) items. This collection is populated when [GetBucketInfo](#getbucketinfo-method-backblazeb2-component) or [GetFileInfo](#getfileinfo-method-backblazeb2-component) is called; and its items are used anytime one of the following methods is called: - [CopyFile](#copyfile-method-backblazeb2-component) (if the [SendMetadataOnCopy](#SendMetadataOnCopy) configuration setting is enabled) - [CreateBucket](#createbucket-method-backblazeb2-component) - [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component) - [UpdateBucket](#updatebucket-method-backblazeb2-component) (if the *NewMetadata* parameter is *true*) - [UploadFile](#uploadfile-method-backblazeb2-component) Note that there is a limit of 10 metadata items per bucket and per file; the component does not enforce this limit, but the server will return an error if it is exceeded. For files specifically, any value set using the [ClientModifiedTime](#ClientModifiedTime) configuration setting *will* count towards this limit; refer that setting's documentation for more information. This property is not available at design time. Please refer to the [B2Metadata](#b2metadata-type) type for a complete list of fields. # OtherHeaders Property ([BackblazeB2](#backblazeb2-component) Component) Other headers as determined by the user (optional). ## Syntax ```text public string OtherHeaders { get; set; } ``` ## Default Value "" ## Remarks This property can be set to a string of headers to be appended to the HTTP request headers created from other properties like [ContentType](#contenttype-property-backblazeb2-component) and From. The headers must follow the format *Header: Value* as described in the HTTP specifications. Header lines should be separated by CRLF (*"\r\n"*) . Use this property with caution. If this property contains invalid headers, HTTP requests may fail. This property is useful for extending the functionality of the component beyond what is provided. This property is not available at design time. # Overwrite Property ([BackblazeB2](#backblazeb2-component) Component) Determines if local files are overwritten. ## Syntax ```text public bool Overwrite { get; set; } ``` ## Default Value False ## Remarks This property controls whether local files are overwritten when calling [DownloadFile](#downloadfile-method-backblazeb2-component) or [DownloadFileById](#downloadfilebyid-method-backblazeb2-component). It is only applicable to local files. # ParsedHeaders Property ([BackblazeB2](#backblazeb2-component) Component) This property includes a collection of headers returned from the last request. ## Syntax ```text public HeaderList ParsedHeaders { get; } ``` ## Remarks This property contains a collection of headers returned from the last request. Whenever headers are returned from the server, the headers are parsed into a collection of headers. Each [Header](#header-type) in this collection contains information describing that header. [MaxHeaders](#MaxHeaders) can be used to control the maximum number of headers saved. This collection is indexed from *0* to *Count - 1*. This property is read-only and not available at design time. Please refer to the [Header](#header-type) type for a complete list of fields. # PartMarker Property ([BackblazeB2](#backblazeb2-component) Component) A marker indicating what page of parts to return next. ## Syntax ```text public string PartMarker { get; set; } ``` ## Default Value "" ## Remarks This property will be populated when [ListParts](#listparts-method-backblazeb2-component) is called if the results are paged and there are more pages. To list all parts, continue to call [ListParts](#listparts-method-backblazeb2-component) until this property returns empty string. Refer to [ListParts](#listparts-method-backblazeb2-component) for more information. This property is not available at design time. # Parts Property ([BackblazeB2](#backblazeb2-component) Component) A collection of multipart upload parts. ## Syntax ```text public B2PartList Parts { get; } ``` ## Remarks This collection holds a list of [B2Part](#b2part-type) items. Calling [ListParts](#listparts-method-backblazeb2-component) will populate this collection. This property is read-only and not available at design time. Please refer to the [B2Part](#b2part-type) type for a complete list of fields. # Prefix Property ([BackblazeB2](#backblazeb2-component) Component) A prefix used to restrict the results returned when listing files. ## Syntax ```text public string Prefix { get; set; } ``` ## Default Value "" ## Remarks This property, if non-empty, is used to restrict the values returned by [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) to only the items whose names begin with the given prefix. Note: If the currently-authenticated application key is restricted to a specific file name prefix (indicated by the [Account](#account-property-backblazeb2-component).[AllowedPrefix](#B2Account_f_AllowedPrefix) field being non-empty), then this property will automatically be set to that prefix if it is empty when one of the aforementioned methods is called. ### File Hierarchy Traversal By using the [Delimiter](#delimiter-property-backblazeb2-component) and Prefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of files (or file versions) as if it were a filesystem. For example, assume that files with the following names exist within a bucket: - *MyCompany* - *MyCompany/Department1* - *MyCompany/Department2* - *MyCompany/Department2/EmployeeA* - *MyCompany/Department2/EmployeeB* With [Delimiter](#delimiter-property-backblazeb2-component) set to */*, we can set Prefix to successively "deeper" values before calling [ListFiles](#listfiles-method-backblazeb2-component) or [ListFileVersions](#listfileversions-method-backblazeb2-component) for the following effect: | Prefix Value | Files Returned | Folders Returned | | --- | --- | --- | | (empty) | MyCompany | MyCompany/ | | MyCompany/ | MyCompany/Department1 MyCompany/Department2 | MyCompany/Department2/ | | MyCompany/Department2/ | MyCompany/Department2/EmployeeA MyCompany/Department2/EmployeeB | (none) | This property is not available at design time. # Proxy Property ([BackblazeB2](#backblazeb2-component) Component) A set of properties related to proxy access. ## Syntax ```text public Proxy Proxy { get; set; } ``` ## Remarks This property contains fields describing the proxy through which the component will attempt to connect. Please refer to the [Proxy](#proxy-type) type for a complete list of fields. # QueryParams Property ([BackblazeB2](#backblazeb2-component) Component) Additional query parameters to be included in the request. ## Syntax ```text public QueryParamList QueryParams { get; } ``` ## Remarks This is a collection of query parameters that will be added to the request. Parameters can be added via the [AddQueryParam](#addqueryparam-method-backblazeb2-component) method. Please refer to the [QueryParam](#queryparam-type) type for a complete list of fields. # Range Property ([BackblazeB2](#backblazeb2-component) Component) The range of bytes to request. ## Syntax ```text public string Range { get; set; } ``` ## Default Value "" ## Remarks This property specifies the range of bytes to request from the server. If this property is non-empty when a [DownloadFile](#downloadfile-method-backblazeb2-component) or [DownloadFileById](#downloadfilebyid-method-backblazeb2-component) request is being constructed, a header like *Range: bytes=*Range** will be added to the request, with **Range** substituted with the specified value. There are two valid formats for this property's value: - **StartByte*-* - **StartByte*-*EndByte** Note: If the [StartByte](#startbyte-property-backblazeb2-component) property is greater than zero when one of the aforementioned methods is called (i.e., when a download is being resumed), and this property is non-empty, the component will automatically advance the **StartByte** value in the specified range by [StartByte](#startbyte-property-backblazeb2-component) bytes when sending the *Range* header to the server. This ensures that the previously-downloaded data at the start of the specified range is not downloaded again when the download is resumed. This property is not available at design time. # SSLAcceptServerCert Property ([BackblazeB2](#backblazeb2-component) Component) Instructs the component to unconditionally accept the server certificate that matches the supplied certificate. ## Syntax ```text public Certificate SSLAcceptServerCert { get; set; } ``` ## Remarks If it finds any issues with the certificate presented by the server, the component will normally terminate the connection with an error. You may override this behavior by supplying a value for SSLAcceptServerCert. If the certificate supplied in SSLAcceptServerCert is the same as the certificate presented by the server, then the server certificate is accepted unconditionally, and the connection will continue normally. NOTE: This functionality is provided only for cases in which you otherwise know that you are communicating with the right server. If used improperly, this property may create a security breach. Use it at your own risk. Please refer to the [Certificate](#certificate-type) type for a complete list of fields. # SSLCert Property ([BackblazeB2](#backblazeb2-component) Component) The certificate to be used during Secure Sockets Layer (SSL) negotiation. ## Syntax ```text public Certificate SSLCert { get; set; } ``` ## Remarks This property includes the digital certificate that the component will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the [Encoded](#Certificate_f_Encoded) field to the encoded certificate. To select a certificate, use the store and subject fields. Please refer to the [Certificate](#certificate-type) type for a complete list of fields. # SSLProvider Property ([BackblazeB2](#backblazeb2-component) Component) The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use. ## Syntax ```text public BackblazeB2SSLProviders SSLProvider { get; set; } enum BackblazeB2SSLProviders { sslpAutomatic, sslpPlatform, sslpInternal } ``` ## Default Value 0 ## Remarks This property specifies the SSL/TLS implementation to use. In most cases the default value of *0* (Automatic) is recommended and should not be changed. When set to *0* (Automatic), the component will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used. Possible values are as follows: | | | | --- | --- | | 0 (sslpAutomatic - default) | Automatically selects the appropriate implementation. | | 1 (sslpPlatform) | Uses the platform/system implementation. | | 2 (sslpInternal) | Uses the internal implementation. | **Additional Notes** In most cases using the default value (Automatic) is recommended. The component will select a provider depending on the current platform. When Automatic is selected, on Windows, the component will use the platform implementation. On Linux/macOS, the component will use the internal implementation. When TLS 1.3 is enabled via [SSLEnabledProtocols](#SSLEnabledProtocols), the component will always try and use the platform implementation. If the platform TLS 1.3 implementation is not available, the internal implementation will be used. The .NET Standard library will always use the internal implementation on all platforms. # SSLServerCert Property ([BackblazeB2](#backblazeb2-component) Component) The server certificate for the last established connection. ## Syntax ```text public Certificate SSLServerCert { get; } ``` ## Remarks This property contains the server certificate for the last established connection. SSLServerCert is reset every time a new connection is attempted. This property is read-only. Please refer to the [Certificate](#certificate-type) type for a complete list of fields. # StartByte Property ([BackblazeB2](#backblazeb2-component) Component) The byte offset from which to resume the upload or download. ## Syntax ```text public long StartByte { get; set; } ``` ## Default Value 0 ## Remarks This property specifies the byte offset from which to resume an automatic multipart upload initiated by [UploadFile](#uploadfile-method-backblazeb2-component), or a download initiated by [DownloadFile](#downloadfile-method-backblazeb2-component) or [DownloadFileById](#downloadfilebyid-method-backblazeb2-component). Refer to those methods' documentation for more information about resuming uploads and downloads. When uploading from a stream, the component will *always* seek forward in the stream if the value of StartByte is greater than zero when [UploadFile](#uploadfile-method-backblazeb2-component) is called. Keep this in mind when resuming interrupted uploads. This property is not available at design time. # Timeout Property ([BackblazeB2](#backblazeb2-component) Component) The timeout for the component. ## Syntax ```text public int Timeout { get; set; } ``` ## Default Value 60 ## Remarks If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered. If Timeout is set to a positive value, the component will wait for the operation to complete before returning control. The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive. If Timeout expires, and the operation is not yet complete, the component throws an exception. NOTE: By default, all timeouts are *inactivity timeouts*, that is, the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received. The default value for the Timeout property is 60 seconds. # VersionMarker Property ([BackblazeB2](#backblazeb2-component) Component) A marker indicating what page of file versions to return next. ## Syntax ```text public string VersionMarker { get; set; } ``` ## Default Value "" ## Remarks This property will be populated when [ListFileVersions](#listfileversions-method-backblazeb2-component) is called if the results are paged and there are more pages. To list all file versions, continue to call [ListFileVersions](#listfileversions-method-backblazeb2-component) until this property returns empty string. Refer to [ListFileVersions](#listfileversions-method-backblazeb2-component) for more information. This property is not available at design time. # AbortMultipartUpload Method ([BackblazeB2](#backblazeb2-component) Component) Aborts a multipart upload. ## Syntax ```text public void AbortMultipartUpload(string multipartFileId); Async Version public async Task AbortMultipartUpload(string multipartFileId); public async Task AbortMultipartUpload(string multipartFileId, CancellationToken cancellationToken); ``` ## Remarks This method aborts the multipart upload of the file specified by *MultipartFileId*, and invalidates the given Id. When this method is called, all parts that have been uploaded for the multipart upload are deleted from the server. The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # AddMetadata Method ([BackblazeB2](#backblazeb2-component) Component) Adds a metadata item to the Metadata properties. ## Syntax ```text public void AddMetadata(string name, string value); Async Version public async Task AddMetadata(string name, string value); public async Task AddMetadata(string name, string value, CancellationToken cancellationToken); ``` ## Remarks This method adds a metadata item with the given *Name* and *Value* to the [Metadata](#metadata-property-backblazeb2-component) collection. *Name* may be up to 50 characters in length, and must consist solely of letters, numbers, hyphens (*-*), and underscores (*_*). The server stores all metadata item names in lowercase. A metadata item's name cannot start with *b2-* unless said name is one those explicitly defined by the Backblaze B2 API documentation. Keep in mind that the value of such a metadata item must comply with the format specified by the Backblaze B2 API documentation as well, otherwise the server will reject it. Note that there is a limit of 10 metadata items per bucket and per file; the component does not enforce this limit, but the server will return an error if it is exceeded. For files specifically, any value set using the [ClientModifiedTime](#ClientModifiedTime) configuration setting *will* count towards this limit; refer that setting's documentation for more information. # AddQueryParam Method ([BackblazeB2](#backblazeb2-component) Component) Adds a query parameter to the QueryParams properties. ## Syntax ```text public void AddQueryParam(string name, string value); Async Version public async Task AddQueryParam(string name, string value); public async Task AddQueryParam(string name, string value, CancellationToken cancellationToken); ``` ## Remarks This method is used to add a query parameter to the [QueryParams](#queryparams-property-backblazeb2-component) collection. *Name* specifies the name of the parameter, and *Value* specifies the value of the parameter. All specified *Value*s will be URL encoded by the component automatically. Consult the service documentation for details on the available parameters. # Authorize Method ([BackblazeB2](#backblazeb2-component) Component) Authenticates the component with the server using the current application key and Id. ## Syntax ```text public void Authorize(); Async Version public async Task Authorize(); public async Task Authorize(CancellationToken cancellationToken); ``` ## Remarks This method authenticates the component with the server using the values held by [ApplicationKey](#applicationkey-property-backblazeb2-component) and [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component). A successful call to this method will clear and repopulate the following: - [Account](#account-property-backblazeb2-component) property - [APIURL](#APIURL) configuration setting - [DownloadURL](#DownloadURL) configuration setting - [FragmentSize](#FragmentSize) configuration setting (if necessary; refer to its documentation for more information) - [SimpleUploadLimit](#SimpleUploadLimit) configuration setting (if necessary; refer to its documentation for more information) The component must authenticate with the server before any other requests can be attempted; the component will call it automatically if necessary. As part of the authentication process, the server returns an authorization token which must be used to authorize all further requests; this token is valid for up to 24 hours. When it expires, this method must be called again. # CompleteMultipartUpload Method ([BackblazeB2](#backblazeb2-component) Component) Completes a multipart upload by assembling the previously uploaded parts. ## Syntax ```text public void CompleteMultipartUpload(string multipartFileId); Async Version public async Task CompleteMultipartUpload(string multipartFileId); public async Task CompleteMultipartUpload(string multipartFileId, CancellationToken cancellationToken); ``` ## Remarks This method completes the multipart upload of the file specified by *MultipartFileId*. The server will assemble all of the parts that have been uploaded into a single file. (Note: The assembled file keeps *MultipartFileId* as its Id.) Note that this method automatically calls [ListParts](#listparts-method-backblazeb2-component) internally to obtain the information needed to complete the multipart upload. This process does not alter the [Parts](#parts-property-backblazeb2-component) collection, nor does it cause the [PartList](#partlist-event-backblazeb2-component) event to fire. The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # Config Method ([BackblazeB2](#backblazeb2-component) Component) Sets or retrieves a configuration setting. ## Syntax ```text public string Config(string configurationString); Async Version public async Task Config(string configurationString); public async Task Config(string configurationString, CancellationToken cancellationToken); ``` ## Remarks Config is a generic method available in every component. It is used to set and retrieve [configuration settings](#config-settings-backblazeb2-component) for the component. These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these *internal properties* is provided through the Config method. To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter). To read (query) the value of a [configuration setting](#config-settings-backblazeb2-component), you must call *Config("PROPERTY")*. The value will be returned as a string. # CopyFile Method ([BackblazeB2](#backblazeb2-component) Component) Copies a file. ## Syntax ```text public string CopyFile(string srcFileId, string destBucketId, string destFileName); Async Version public async Task CopyFile(string srcFileId, string destBucketId, string destFileName); public async Task CopyFile(string srcFileId, string destBucketId, string destFileName, CancellationToken cancellationToken); ``` ## Remarks This method copies the file version specified by *SrcFileId* to the bucket specified by *DestBucketId* with the name *DestFileName*. The Id of the newly-created file is returned. If *DestBucketId* is empty, the source file's bucket is used as the destination bucket. *DestFileName* is subject to the same restrictions described in the [UploadFile](#uploadfile-method-backblazeb2-component) method's documentation; refer to it for more information. If a file named *DestFileName* already exists in the destination bucket, a new version of it is created. If the [SendMetadataOnCopy](#SendMetadataOnCopy) configuration setting is enabled, and the [ContentType](#contenttype-property-backblazeb2-component) property, the [Metadata](#metadata-property-backblazeb2-component) collection, and/or the [ClientModifiedTime](#ClientModifiedTime) configuration setting are non-empty, then their values will be applied to the destination file. Otherwise, the server will copy the source file's content type and metadata to the destination file. Finally, note that this method can only be used to copy files up to 5GB in size (or, if [Range](#range-property-backblazeb2-component) is non-empty, a range of up to 5GB of data from a larger file). To copy more than 5GB of data, start a new multipart upload with [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), and then use the [CopyPart](#copypart-method-backblazeb2-component) method to copy the desired data in parts. The currently-authenticated application key must have the *writeFiles* and (if the source file's bucket kind is *allPrivate*) *readFiles* capabilities to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # CopyPart Method ([BackblazeB2](#backblazeb2-component) Component) Copies the specified file as part of a multipart upload. ## Syntax ```text public void CopyPart(string srcFileId, string multipartFileId, int partNumber); Async Version public async Task CopyPart(string srcFileId, string multipartFileId, int partNumber); public async Task CopyPart(string srcFileId, string multipartFileId, int partNumber, CancellationToken cancellationToken); ``` ## Remarks This method copies the file version specified by *SrcFileId* to a new part in the multipart upload of the file specified by *MultipartFileId*. The part's number is specified by *PartNumber*; it must be a value in the range *1* to *10000*, inclusive. If the specified multipart upload already has a part with the given *PartNumber*, it is replaced with the one created by this request. All parts must be between 5MB and 5GB in size (except for the last part, which can be as small as 1 byte). The [Range](#range-property-backblazeb2-component) property can optionally be set before calling this method to copy only a specific range of data from the specified source file. The currently-authenticated application key must have the *writeFiles* and (if the source file's bucket kind is *allPrivate*) *readFiles* capabilities to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # CreateAppKey Method ([BackblazeB2](#backblazeb2-component) Component) Creates a new application key. ## Syntax ```text public string CreateAppKey(string keyName, string capabilities, string allowedBucketId, string allowedPrefix, long validityDuration); Async Version public async Task CreateAppKey(string keyName, string capabilities, string allowedBucketId, string allowedPrefix, long validityDuration); public async Task CreateAppKey(string keyName, string capabilities, string allowedBucketId, string allowedPrefix, long validityDuration, CancellationToken cancellationToken); ``` ## Remarks This method creates a new application key named *KeyName* with the specified *Capabilities*. If successful, this method returns a string containing the newly-created application key's Id, followed by the key itself, separated by a newline (*\n*) character; for example: ```text [application_key_id] [application_key] ``` **Important:** This is the *only* time that the application key's key string will be returned, be sure to save it *immediately*. It is *not* present in the results returned by the [ListAppKeys](#listappkeys-method-backblazeb2-component) method (this is a security feature enforced by the server). The string passed for *Capabilities* must be formatted as a comma-separated list of one or more of the following: | Capability String | Related Methods | | --- | --- | | deleteBuckets | [DeleteBucket](#deletebucket-method-backblazeb2-component) | | deleteFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) | | deleteKeys | [DeleteAppKey](#deleteappkey-method-backblazeb2-component) | | listBuckets | [GetBucketInfo](#getbucketinfo-method-backblazeb2-component), [ListBuckets](#listbuckets-method-backblazeb2-component) | | listFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) | | listKeys | [ListAppKeys](#listappkeys-method-backblazeb2-component) | | readFiles | [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [DownloadFile](#downloadfile-method-backblazeb2-component), [DownloadFileById](#downloadfilebyid-method-backblazeb2-component), [GetFileInfo](#getfileinfo-method-backblazeb2-component) | | shareFiles | [GetDownloadAuthToken](#getdownloadauthtoken-method-backblazeb2-component) | | writeBuckets | [CreateBucket](#createbucket-method-backblazeb2-component), [UpdateBucket](#updatebucket-method-backblazeb2-component) | | writeFiles | [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component), [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component), [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [HideFile](#hidefile-method-backblazeb2-component), [ListParts](#listparts-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), [UploadFile](#uploadfile-method-backblazeb2-component), [UploadPart](#uploadpart-method-backblazeb2-component) | | writeKeys | CreateAppKey | To restrict the new application key to a specific bucket, pass the bucket's Id for *AllowedBucketId*. To further restrict it to files with a specific prefix within that bucket, pass said prefix for *AllowedPrefix*. It is not possible to apply a prefix restriction without a bucket restriction. The *ValidityDuration* parameter specifies how many seconds the new application key will be valid for. The maximum valid value is *86400000* (1000 days); values less than *1* will cause the application key to remain valid indefinitely. The currently-authenticated application key must have the *writeKeys* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # CreateBucket Method ([BackblazeB2](#backblazeb2-component) Component) Creates a new bucket. ## Syntax ```text public string CreateBucket(string bucketName, string kind); Async Version public async Task CreateBucket(string bucketName, string kind); public async Task CreateBucket(string bucketName, string kind, CancellationToken cancellationToken); ``` ## Remarks This method creates a new bucket named *BucketName* of the specified *Kind*. Valid values for *Kind* are *allPrivate* (default if empty) and *allPublic*. Each account may have up to 100 buckets. The value passed for *BucketName* must comply with the following restrictions: - Must be between 6 and 50 characters long (inclusive). - Must consist solely of letters, digits, and hyphens (*-*). - Cannot start with the string *b2-*. - Must be globally unique (i.e., no two accounts may have a bucket with the same name) when compared case-insensitively. If any items are present in the [Metadata](#metadata-property-backblazeb2-component) collection, they will also be included in the request and applied to the newly-created bucket. Keep in mind that the server enforces a limit of 10 metadata items per bucket. The currently-authenticated application key must have the *writeBuckets* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # DeleteAppKey Method ([BackblazeB2](#backblazeb2-component) Component) Deletes an application key. ## Syntax ```text public void DeleteAppKey(string keyId); Async Version public async Task DeleteAppKey(string keyId); public async Task DeleteAppKey(string keyId, CancellationToken cancellationToken); ``` ## Remarks This method deletes the application key specified by *KeyId*. The currently-authenticated application key must have the *deleteKeys* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # DeleteBucket Method ([BackblazeB2](#backblazeb2-component) Component) Deletes a bucket. ## Syntax ```text public void DeleteBucket(string bucketId); Async Version public async Task DeleteBucket(string bucketId); public async Task DeleteBucket(string bucketId, CancellationToken cancellationToken); ``` ## Remarks This method deletes the bucket specified by *BucketId*. A bucket must be completely empty to be deleted. Note that bucket names are global, and it may not be possible to recreate a deleted bucket if its name is taken by another user in the meantime. The currently-authenticated application key must have the *deleteBuckets* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # DeleteFile Method ([BackblazeB2](#backblazeb2-component) Component) Deletes all versions of a file. ## Syntax ```text public void DeleteFile(string bucketId, string fileName); Async Version public async Task DeleteFile(string bucketId, string fileName); public async Task DeleteFile(string bucketId, string fileName, CancellationToken cancellationToken); ``` ## Remarks This method deletes all versions of the file named *FileName* from the bucket specified by *BucketId*. If the latest "version" of the specified file is an incomplete multipart upload, the multipart upload is aborted. The currently-authenticated application key must have the *listFiles* and *deleteFiles* capabilities to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. Note: This method is offered as a convenience, as the Backblaze B2 REST API does not technically provide a way to delete all versions of a file using a single request. When this method is called, the component uses [ListFileVersions](#listfileversions-method-backblazeb2-component) to obtain a list of all versions of the specified file, and then uses [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) to delete each one, in order from oldest to newest. If any one request made during this process fails, this method will fail immediately. This process does not alter the [Files](#files-property-backblazeb2-component) or [FileMarker](#filemarker-property-backblazeb2-component) properties, nor does it cause the [FileList](#filelist-event-backblazeb2-component) event to fire. # DeleteFileVersion Method ([BackblazeB2](#backblazeb2-component) Component) Deletes a file version. ## Syntax ```text public void DeleteFileVersion(string fileId); Async Version public async Task DeleteFileVersion(string fileId); public async Task DeleteFileVersion(string fileId, CancellationToken cancellationToken); ``` ## Remarks This method deletes the file version specified by *FileId*, regardless of whether said version is an actual file or a hide marker If the most recent version of a file is deleted, and older versions of the file exist, then the most recent older version will become the "current" version. If said version is a hide marker, then the file will become "hidden"; refer to [HideFile](#hidefile-method-backblazeb2-component) for more information. The currently-authenticated application key must have the *deleteFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # DownloadFile Method ([BackblazeB2](#backblazeb2-component) Component) Downloads a file by name. ## Syntax ```text public void DownloadFile(string bucketName, string fileName); Async Version public async Task DownloadFile(string bucketName, string fileName); public async Task DownloadFile(string bucketName, string fileName, CancellationToken cancellationToken); ``` ## Remarks This method downloads the latest version of the file named *FileName* from the bucket named *BucketName*. The [Range](#range-property-backblazeb2-component) property can optionally be set before calling this method to download a specific range of data from the file. This method can be used to download files that are owned by other accounts, so long as an appropriate download authorization token and download URL are supplied using the [DownloadAuthToken](#DownloadAuthToken) and [DownloadURL](#DownloadURL) configuration settings; refer to their documentation for more information. If a stream has been specified using [SetDownloadStream](#setdownloadstream-method-backblazeb2-component), the file data will be sent through it. If a stream is not specified, and [LocalFile](#localfile-property-backblazeb2-component) is set, the file data will be saved to the specified location; otherwise, the file data will be held by [FileData](#filedata-property-backblazeb2-component). To download and decrypt an encrypted file, set [EncryptionAlgorithm](#encryptionalgorithm-property-backblazeb2-component) and [EncryptionPassword](#encryptionpassword-property-backblazeb2-component) before calling this method. ### Download Notes In the simplest use-case, downloading a file looks like this: ```text b2.LocalFile = "../MyData.zip"; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). ``` **Resuming Downloads** The component also supports resuming failed downloads by using the [StartByte](#startbyte-property-backblazeb2-component) property. If a download is interrupted, set [StartByte](#startbyte-property-backblazeb2-component) to the appropriate offset before calling this method to resume the download. ```text string downloadFile = "../MyData.zip"; b2.LocalFile = downloadFile; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). //The transfer is interrupted and DownloadFile() above fails. Later, resume the download: //Get the size of the partially downloaded file b2.StartByte = new FileInfo(downloadFile).Length; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). ``` **Resuming Encrypted File Downloads** Resuming encrypted file downloads is only supported when [LocalFile](#localfile-property-backblazeb2-component) was set in the initial download attempt. If [LocalFile](#localfile-property-backblazeb2-component) is set when beginning an encrypted download, the component creates a temporary file in [TempPath](#TempPath) to hold the encrypted data until the download is complete. If the download is interrupted, [DownloadTempFile](#DownloadTempFile) will be populated with the path of the temporary file that holds the partial data. To resume, [DownloadTempFile](#DownloadTempFile) must be populated, along with [StartByte](#startbyte-property-backblazeb2-component), to allow the remainder of the encrypted data to be downloaded. Once the encrypted data is downloaded it will be decrypted and written to [LocalFile](#localfile-property-backblazeb2-component). ```text b2.LocalFile = "../MyData.zip"; b2.EncryptionPassword = "password"; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). //The transfer is interrupted and DownloadFile() above fails. Later, resume the download: //Get the size of the partially downloaded temp file b2.StartByte = new FileInfo(b2.Config("DownloadTempFile")).Length; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). ``` The currently-authenticated application key must have the *readFiles* capability (unless the bucket is public) to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # DownloadFileById Method ([BackblazeB2](#backblazeb2-component) Component) Downloads a file by Id. ## Syntax ```text public void DownloadFileById(string fileId); Async Version public async Task DownloadFileById(string fileId); public async Task DownloadFileById(string fileId, CancellationToken cancellationToken); ``` ## Remarks This method downloads the file version specified by *FileId*. The [Range](#range-property-backblazeb2-component) property can optionally be set before calling this method to download a specific range of data from the file. If a stream has been specified using [SetDownloadStream](#setdownloadstream-method-backblazeb2-component), the file data will be sent through it. If a stream is not specified, and [LocalFile](#localfile-property-backblazeb2-component) is set, the file data will be saved to the specified location; otherwise, the file data will be held by [FileData](#filedata-property-backblazeb2-component). To download and decrypt an encrypted file, set [EncryptionAlgorithm](#encryptionalgorithm-property-backblazeb2-component) and [EncryptionPassword](#encryptionpassword-property-backblazeb2-component) before calling this method. ### Download Notes In the simplest use-case, downloading a file looks like this: ```text b2.LocalFile = "../MyData.zip"; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). ``` **Resuming Downloads** The component also supports resuming failed downloads by using the [StartByte](#startbyte-property-backblazeb2-component) property. If a download is interrupted, set [StartByte](#startbyte-property-backblazeb2-component) to the appropriate offset before calling this method to resume the download. ```text string downloadFile = "../MyData.zip"; b2.LocalFile = downloadFile; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). //The transfer is interrupted and DownloadFile() above fails. Later, resume the download: //Get the size of the partially downloaded file b2.StartByte = new FileInfo(downloadFile).Length; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). ``` **Resuming Encrypted File Downloads** Resuming encrypted file downloads is only supported when [LocalFile](#localfile-property-backblazeb2-component) was set in the initial download attempt. If [LocalFile](#localfile-property-backblazeb2-component) is set when beginning an encrypted download, the component creates a temporary file in [TempPath](#TempPath) to hold the encrypted data until the download is complete. If the download is interrupted, [DownloadTempFile](#DownloadTempFile) will be populated with the path of the temporary file that holds the partial data. To resume, [DownloadTempFile](#DownloadTempFile) must be populated, along with [StartByte](#startbyte-property-backblazeb2-component), to allow the remainder of the encrypted data to be downloaded. Once the encrypted data is downloaded it will be decrypted and written to [LocalFile](#localfile-property-backblazeb2-component). ```text b2.LocalFile = "../MyData.zip"; b2.EncryptionPassword = "password"; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). //The transfer is interrupted and DownloadFile() above fails. Later, resume the download: //Get the size of the partially downloaded temp file b2.StartByte = new FileInfo(b2.Config("DownloadTempFile")).Length; b2.DownloadFile("MyBucket", "data.zip"); // Or, DownloadFileById(). ``` The currently-authenticated application key must have the *readFiles* capability (unless the bucket is public) to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # GetBucketInfo Method ([BackblazeB2](#backblazeb2-component) Component) Gets a bucket's information and metadata. ## Syntax ```text public void GetBucketInfo(string bucketId); Async Version public async Task GetBucketInfo(string bucketId); public async Task GetBucketInfo(string bucketId, CancellationToken cancellationToken); ``` ## Remarks This method gets information and metadata for the bucket specified by *BucketId*. Calling this method will fire the [BucketList](#bucketlist-event-backblazeb2-component) and [MetadataList](#metadatalist-event-backblazeb2-component) events, and will re-populate the [Buckets](#buckets-property-backblazeb2-component) and [Metadata](#metadata-property-backblazeb2-component) collection properties. The currently-authenticated application key must have the *listBuckets* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # GetDownloadAuthToken Method ([BackblazeB2](#backblazeb2-component) Component) Create a download authorization token for one or more files in a bucket. ## Syntax ```text public string GetDownloadAuthToken(string allowedBucketId, string allowedPrefix, int validityDuration); Async Version public async Task GetDownloadAuthToken(string allowedBucketId, string allowedPrefix, int validityDuration); public async Task GetDownloadAuthToken(string allowedBucketId, string allowedPrefix, int validityDuration, CancellationToken cancellationToken); ``` ## Remarks This method creates and returns a download authorization token for the files in the bucket specified by *AllowedBucketId* whose names start with *AllowedPrefix*. The newly-created token will remain valid for the number of seconds specified by *ValidityDuration*, which must be a value in the range *1* to *604800* (1 week), inclusive. Download authorization tokens created using this method can be used by anybody to download an applicable file by name; they cannot be used to download a file by Id. Refer to the [DownloadFile](#downloadfile-method-backblazeb2-component) method for more information. The currently-authenticated application key must have the *shareFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # GetFileInfo Method ([BackblazeB2](#backblazeb2-component) Component) Gets a file's information and metadata. ## Syntax ```text public void GetFileInfo(string fileId); Async Version public async Task GetFileInfo(string fileId); public async Task GetFileInfo(string fileId, CancellationToken cancellationToken); ``` ## Remarks This method gets information and metadata for the file version specified by *FileId* (which must be a real file version, or a hide marker, not a multipart upload). Calling this method will fire the [FileList](#filelist-event-backblazeb2-component) and [MetadataList](#metadatalist-event-backblazeb2-component) events, and will re-populate the [Files](#files-property-backblazeb2-component) and [Metadata](#metadata-property-backblazeb2-component) collection properties. The currently-authenticated application key must have the *readFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # HideFile Method ([BackblazeB2](#backblazeb2-component) Component) Hides a file. ## Syntax ```text public string HideFile(string bucketId, string fileName); Async Version public async Task HideFile(string bucketId, string fileName); public async Task HideFile(string bucketId, string fileName, CancellationToken cancellationToken); ``` ## Remarks This method hides the file named *FileName* in the bucket specified by *BucketId* by creating a special version of the file called a *hide marker*. If the latest version of a file is a hide marker, then the file will not appear in the results returned by [ListFiles](#listfiles-method-backblazeb2-component), nor can it be downloaded by name using [DownloadFile](#downloadfile-method-backblazeb2-component). However: - Any version of the file (excluding hide markers) can still be downloaded directly using [DownloadFileById](#downloadfilebyid-method-backblazeb2-component). - All versions of the file can still be deleted, either all at once using [DeleteFile](#deletefile-method-backblazeb2-component), or individually using [DeleteFileVersion](#deletefileversion-method-backblazeb2-component). - All versions of the file will still appear in the results returned by [ListFileVersions](#listfileversions-method-backblazeb2-component), and can still be queried individually using [GetFileInfo](#getfileinfo-method-backblazeb2-component). To unhide a file, simply delete the hide marker using [DeleteFileVersion](#deletefileversion-method-backblazeb2-component). The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # Interrupt Method ([BackblazeB2](#backblazeb2-component) Component) This method interrupts the current method. ## Syntax ```text public void Interrupt(); Async Version public async Task Interrupt(); public async Task Interrupt(CancellationToken cancellationToken); ``` ## Remarks If there is no method in progress, Interrupt simply returns, doing nothing. # ListAppKeys Method ([BackblazeB2](#backblazeb2-component) Component) Lists the account's application keys. ## Syntax ```text public void ListAppKeys(); Async Version public async Task ListAppKeys(); public async Task ListAppKeys(CancellationToken cancellationToken); ``` ## Remarks This method lists the application keys associated with the account. Note that the account's master application key is *not* included in the results. Calling this method will fire the [AppKeyList](#appkeylist-event-backblazeb2-component) event once for each application key, and will also populate the [AppKeys](#appkeys-property-backblazeb2-component) collection. If there are still more application keys available to list when this method returns, the [AppKeyMarker](#appkeymarker-property-backblazeb2-component) property will be populated. Continue to call this method until [AppKeyMarker](#appkeymarker-property-backblazeb2-component) is empty to accumulate all pages of results in the [AppKeys](#appkeys-property-backblazeb2-component) collection. Alternatively, the [AccumulatePages](#AccumulatePages) configuration setting can be disabled to clear the [AppKeys](#appkeys-property-backblazeb2-component) collection every time a page of results is returned. The [MaxAppKeyResults](#MaxAppKeyResults) configuration setting can be used to control the maximum number of results returned each time this method is called. The currently-authenticated application key must have the *listKeys* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # ListBuckets Method ([BackblazeB2](#backblazeb2-component) Component) Lists all buckets in the account. ## Syntax ```text public void ListBuckets(); Async Version public async Task ListBuckets(); public async Task ListBuckets(CancellationToken cancellationToken); ``` ## Remarks This method lists all buckets in the account. Calling this method will fire the [BucketList](#bucketlist-event-backblazeb2-component) event once for each bucket, and will also populate the [Buckets](#buckets-property-backblazeb2-component) collection. If the [ListWithMetadata](#ListWithMetadata) configuration setting is enabled, the [MetadataList](#metadatalist-event-backblazeb2-component) event will also be fired, once for each metadata item associated with each bucket. If the currently-authenticated application key is restricted to a specific bucket (indicated by the [Account](#account-property-backblazeb2-component).[AllowedBucketId](#B2Account_f_AllowedBucketId) field being non-empty), the results will only include information for that bucket. The currently-authenticated application key must have the *listBuckets* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # ListFiles Method ([BackblazeB2](#backblazeb2-component) Component) Lists the files in a bucket. ## Syntax ```text public void ListFiles(string bucketId); Async Version public async Task ListFiles(string bucketId); public async Task ListFiles(string bucketId, CancellationToken cancellationToken); ``` ## Remarks This method lists the files in the bucket specified by *BucketId*. Before calling this method, the [Prefix](#prefix-property-backblazeb2-component) property may be set in order to restrict the results to only the files whose names begin with the a given string. The [Delimiter](#delimiter-property-backblazeb2-component) property can also be used to further tune the results returned. The [MaxResults](#MaxResults) configuration setting may also be used to limit the number of results returned. If the currently-authenticated application key is restricted to a specific file name prefix (indicated by the [Account](#account-property-backblazeb2-component).[AllowedPrefix](#B2Account_f_AllowedPrefix) field being non-empty), then the [Prefix](#prefix-property-backblazeb2-component) property will automatically be set to that prefix if it is empty when this method is called. Calling this method will fire the [FileList](#filelist-event-backblazeb2-component) event once for each file, and will also populate the [Files](#files-property-backblazeb2-component) collection. If the [ListWithMetadata](#ListWithMetadata) configuration setting is enabled, the [MetadataList](#metadatalist-event-backblazeb2-component) event will also be fired, once for each metadata item associated with each file. If there are still more files available to list when this method returns, the [FileMarker](#filemarker-property-backblazeb2-component) property will be populated. Continue to call this method until [FileMarker](#filemarker-property-backblazeb2-component) is empty to accumulate all pages of results in the [Files](#files-property-backblazeb2-component) collection. Alternatively, the [AccumulatePages](#AccumulatePages) configuration setting can be disabled to clear the [Files](#files-property-backblazeb2-component) collection every time a page of results is returned. The currently-authenticated application key must have the *listFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. ### File Hierarchy Traversal By using the [Delimiter](#delimiter-property-backblazeb2-component) and [Prefix](#prefix-property-backblazeb2-component) properties in tandem, applications can effectively "traverse" a virtual hierarchy of files (or file versions) as if it were a filesystem. For example, assume that files with the following names exist within a bucket: - *MyCompany* - *MyCompany/Department1* - *MyCompany/Department2* - *MyCompany/Department2/EmployeeA* - *MyCompany/Department2/EmployeeB* With [Delimiter](#delimiter-property-backblazeb2-component) set to */*, we can set [Prefix](#prefix-property-backblazeb2-component) to successively "deeper" values before calling ListFiles or [ListFileVersions](#listfileversions-method-backblazeb2-component) for the following effect: | [Prefix](#prefix-property-backblazeb2-component) Value | Files Returned | Folders Returned | | --- | --- | --- | | (empty) | MyCompany | MyCompany/ | | MyCompany/ | MyCompany/Department1 MyCompany/Department2 | MyCompany/Department2/ | | MyCompany/Department2/ | MyCompany/Department2/EmployeeA MyCompany/Department2/EmployeeB | (none) | # ListFileVersions Method ([BackblazeB2](#backblazeb2-component) Component) Lists the file versions in a bucket. ## Syntax ```text public void ListFileVersions(string bucketId); Async Version public async Task ListFileVersions(string bucketId); public async Task ListFileVersions(string bucketId, CancellationToken cancellationToken); ``` ## Remarks This method lists the file versions in the bucket specified by *BucketId*. Before calling this method, the [Prefix](#prefix-property-backblazeb2-component) property may be set in order to restrict the results to only the file versions whose names begin with the a given string. The [Delimiter](#delimiter-property-backblazeb2-component) property can also be used to further tune the results returned. The [MaxResults](#MaxResults) configuration setting may also be used to limit the number of results returned. If the currently-authenticated application key is restricted to a specific file name prefix (indicated by the [Account](#account-property-backblazeb2-component).[AllowedPrefix](#B2Account_f_AllowedPrefix) field being non-empty), then the [Prefix](#prefix-property-backblazeb2-component) property will automatically be set to that prefix if it is empty when this method is called. Calling this method will fire the [FileList](#filelist-event-backblazeb2-component) event once for each file version, and will also populate the [Files](#files-property-backblazeb2-component) collection. If the [ListWithMetadata](#ListWithMetadata) configuration setting is enabled, the [MetadataList](#metadatalist-event-backblazeb2-component) event will also be fired, once for each metadata item associated with each file version. If there are still more files versions available to list when this method returns, the [VersionMarker](#versionmarker-property-backblazeb2-component) property will be populated. Continue to call this method until [VersionMarker](#versionmarker-property-backblazeb2-component) is empty to accumulate all pages of results in the [Files](#files-property-backblazeb2-component) collection. Alternatively, the [AccumulatePages](#AccumulatePages) configuration setting can be disabled to clear the [Files](#files-property-backblazeb2-component) collection every time a page of results is returned. The currently-authenticated application key must have the *listFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. ### File Hierarchy Traversal By using the [Delimiter](#delimiter-property-backblazeb2-component) and [Prefix](#prefix-property-backblazeb2-component) properties in tandem, applications can effectively "traverse" a virtual hierarchy of files (or file versions) as if it were a filesystem. For example, assume that files with the following names exist within a bucket: - *MyCompany* - *MyCompany/Department1* - *MyCompany/Department2* - *MyCompany/Department2/EmployeeA* - *MyCompany/Department2/EmployeeB* With [Delimiter](#delimiter-property-backblazeb2-component) set to */*, we can set [Prefix](#prefix-property-backblazeb2-component) to successively "deeper" values before calling [ListFiles](#listfiles-method-backblazeb2-component) or ListFileVersions for the following effect: | [Prefix](#prefix-property-backblazeb2-component) Value | Files Returned | Folders Returned | | --- | --- | --- | | (empty) | MyCompany | MyCompany/ | | MyCompany/ | MyCompany/Department1 MyCompany/Department2 | MyCompany/Department2/ | | MyCompany/Department2/ | MyCompany/Department2/EmployeeA MyCompany/Department2/EmployeeB | (none) | # ListMultipartUploads Method ([BackblazeB2](#backblazeb2-component) Component) Lists the in-progress multipart uploads in a bucket. ## Syntax ```text public void ListMultipartUploads(string bucketId); Async Version public async Task ListMultipartUploads(string bucketId); public async Task ListMultipartUploads(string bucketId, CancellationToken cancellationToken); ``` ## Remarks This method lists the in-progress multipart uploads in the bucket specified by *BucketId*. Before calling this method, the [Prefix](#prefix-property-backblazeb2-component) property may be set in order to restrict the results to only the multipart uploads whose file names begin with the a given string. If the currently-authenticated application key is restricted to a specific file name prefix (indicated by the [Account](#account-property-backblazeb2-component).[AllowedPrefix](#B2Account_f_AllowedPrefix) field being non-empty), then the [Prefix](#prefix-property-backblazeb2-component) property will automatically be set to that prefix if it is empty when this method is called. Calling this method will fire the [FileList](#filelist-event-backblazeb2-component) event once for each multipart upload, and will also populate the [Files](#files-property-backblazeb2-component) collection. If the [ListWithMetadata](#ListWithMetadata) configuration setting is enabled, the [MetadataList](#metadatalist-event-backblazeb2-component) event will also be fired, once for each metadata item associated with each multipart upload. The currently-authenticated application key must have the *listFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # ListParts Method ([BackblazeB2](#backblazeb2-component) Component) Lists a multipart upload's parts. ## Syntax ```text public void ListParts(string multipartFileId); Async Version public async Task ListParts(string multipartFileId); public async Task ListParts(string multipartFileId, CancellationToken cancellationToken); ``` ## Remarks This method lists the parts that have been created for the multipart file upload specified by *MultipartFileId*. Calling this method will fire the [PartList](#partlist-event-backblazeb2-component) event once for each part, and will also populate the [Parts](#parts-property-backblazeb2-component) collection. If there are still more parts available to list when this method returns, the [PartMarker](#partmarker-property-backblazeb2-component) property will be populated. Continue to call this method until [PartMarker](#partmarker-property-backblazeb2-component) is empty to accumulate all pages of results in the [Parts](#parts-property-backblazeb2-component) collection. Alternatively, the [AccumulatePages](#AccumulatePages) configuration setting can be disabled to clear the [Parts](#parts-property-backblazeb2-component) collection every time a page of results is returned. The [MaxPartResults](#MaxPartResults) configuration setting can be used to control the maximum number of results returned each time this method is called. The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # Reset Method ([BackblazeB2](#backblazeb2-component) Component) Resets the component to its initial state. ## Syntax ```text public void Reset(); Async Version public async Task Reset(); public async Task Reset(CancellationToken cancellationToken); ``` ## Remarks This method resets the component to its initial state. # SendCustomRequest Method ([BackblazeB2](#backblazeb2-component) Component) Sends a custom request to the Backblaze B2 API. ## Syntax ```text public void SendCustomRequest(string httpMethod, string operation, string requestBody); Async Version public async Task SendCustomRequest(string httpMethod, string operation, string requestBody); public async Task SendCustomRequest(string httpMethod, string operation, string requestBody, CancellationToken cancellationToken); ``` ## Remarks This method can be used to send arbitrary requests to the Backblaze B2 API. Valid values for *HttpMethod* are: - *GET* (default if empty) - *HEAD* - *POST* The value passed for *Operation* must be one of the API operations described in the Backblaze B2 REST API documentation (e.g., *b2_list_buckets*). ### Usage When this method is called, the component does the following: 1. Builds a request URL, including query parameters, as follows: - The specified *Operation* is appended to the base Backblaze B2 API URL (refer to the [APIURL](#APIURL) configuration setting for more information). - All query parameters in the [QueryParams](#queryparams-property-backblazeb2-component) collection are added to the request URL. 2. Sends the request using the specified *HttpMethod*, the request URL built in step 1, the header information built from [Account](#account-property-backblazeb2-component).[AuthToken](#B2Account_f_AuthToken) and [OtherHeaders](#otherheaders-property-backblazeb2-component), and the given *RequestBody* (if non-empty). 3. Stores the response headers in the [ParsedHeaders](#parsedheaders-property-backblazeb2-component) collection, and the response body in the stream specified using [SetDownloadStream](#setdownloadstream-method-backblazeb2-component), the specified [LocalFile](#localfile-property-backblazeb2-component), or ResourceData (using the same logic as [DownloadFile](#downloadfile-method-backblazeb2-component)). If the response body is JSON data, the [XPath](#XPath), [XText](#XText), and other **X*** configuration settings can then be used to navigate and extract information from it. # SetDownloadStream Method ([BackblazeB2](#backblazeb2-component) Component) Sets the stream to which downloaded data will be written. ## Syntax ```text public void SetDownloadStream(System.IO.Stream downloadStream); Async Version public async Task SetDownloadStream(System.IO.Stream downloadStream); public async Task SetDownloadStream(System.IO.Stream downloadStream, CancellationToken cancellationToken); ``` ## Remarks If a download stream is set before data is downloaded, the downloaded data will be written to the stream. The stream should be open and normally set to position 0. Note: Passing a non-null value for *DownloadStream* will cause [LocalFile](#localfile-property-backblazeb2-component) to be cleared. Similarly, setting [LocalFile](#localfile-property-backblazeb2-component) to a non-empty value will discard any stream set using this method. # SetUploadStream Method ([BackblazeB2](#backblazeb2-component) Component) Sets the stream from which data is read when uploading. ## Syntax ```text public void SetUploadStream(System.IO.Stream uploadStream); Async Version public async Task SetUploadStream(System.IO.Stream uploadStream); public async Task SetUploadStream(System.IO.Stream uploadStream, CancellationToken cancellationToken); ``` ## Remarks If an upload stream is set before data is uploaded, the content of the stream will be read by the component and uploaded to the server. The stream should be open and normally set to position 0. Note: Passing a non-null value for *UploadStream* will cause [LocalFile](#localfile-property-backblazeb2-component) to be cleared. Similarly, setting [LocalFile](#localfile-property-backblazeb2-component) to a non-empty value will discard any stream set using this method. # StartMultipartUpload Method ([BackblazeB2](#backblazeb2-component) Component) Starts a new multipart upload. ## Syntax ```text public string StartMultipartUpload(string bucketId, string fileName); Async Version public async Task StartMultipartUpload(string bucketId, string fileName); public async Task StartMultipartUpload(string bucketId, string fileName, CancellationToken cancellationToken); ``` ## Remarks This method starts a new multipart upload for a file named *FileName* in the bucket specified by *BucketId*, and returns the Id of the newly-created multipart upload. This Id can then be used to call the following methods: - [UploadPart](#uploadpart-method-backblazeb2-component) - [CopyPart](#copypart-method-backblazeb2-component) - [ListParts](#listparts-method-backblazeb2-component) - [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component) - [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component) *FileName* is subject to the same restrictions described in the [UploadFile](#uploadfile-method-backblazeb2-component) method's documentation; refer to it for more information. If a file named *FileName* already exists in the destination bucket, a new version of it is created. The following information is also included in the request, and will be applied to the final file when the multipart upload is completed with [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component): - All metadata items present in the [Metadata](#metadata-property-backblazeb2-component) collection. Keep in mind that the server enforces a limit of 10 metadata items per file. - If the [ClientModifiedTime](#ClientModifiedTime) configuration setting is non-empty: an additional metadata item with its value (which *does* count towards the 10 item limit). - The value of the [ContentType](#contenttype-property-backblazeb2-component) property. Multipart uploads never expire, they must be explicitly completed or aborted using [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component) or [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component). The [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) method can be used to retrieve a list of current multipart uploads. The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # UpdateBucket Method ([BackblazeB2](#backblazeb2-component) Component) Updates a bucket's kind and/or metadata. ## Syntax ```text public void UpdateBucket(string bucketId, string newKind, bool newMetadata); Async Version public async Task UpdateBucket(string bucketId, string newKind, bool newMetadata); public async Task UpdateBucket(string bucketId, string newKind, bool newMetadata, CancellationToken cancellationToken); ``` ## Remarks This method updates the kind and/or metadata of the bucket specified by *BucketId*. If *NewKind* is non-empty, it must be *allPrivate* or *allPublic*. If *NewKind* is empty, the bucket's kind remains unchanged. If *NewMetadata* is *true*, the bucket's current metadata items are replaced with those in the [Metadata](#metadata-property-backblazeb2-component) collection (or cleared, if said collection is empty). If *NewMetadata* is *false*, the bucket's current metadata remains unchanged. Keep in mind that the server enforces a limit of 10 metadata items per bucket. If *NewKind* is empty and *NewMetadata* is false, this method does nothing. The [IfRevision](#IfRevision) setting can optionally be set before calling this method to ensure that the requested changes are only made if the bucket's current revision matches the given one. The currently-authenticated application key must have the *writeBuckets* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # UploadFile Method ([BackblazeB2](#backblazeb2-component) Component) Uploads a file. ## Syntax ```text public string UploadFile(string bucketId, string fileName); Async Version public async Task UploadFile(string bucketId, string fileName); public async Task UploadFile(string bucketId, string fileName, CancellationToken cancellationToken); ``` ## Remarks This method uploads a new file named *FileName* to the bucket specified by *BucketId*, and returns the Id of the newly-created file. The value passed for *FileName* must comply with the following restrictions: - Cannot contain non-printable or *DEL* characters (i.e., character codes below *32* or equal to *127*, respectively). - Cannot contain backslashes (*\*). - Cannot begin or end with a slash (*/*), and cannot contain two subsequent slashes (*//*). - No segment (i.e., a part between slashes) can be more than 250 bytes long (when UTF-8 encoded). - The overall string can be no more than 1024 bytes long overall (when UTF-8 encoded). If a file with the specified *FileName* already exists in the destination bucket, a new version of it is created. The following information is also included in the request, and will be applied to the newly-created file: - All metadata items present in the [Metadata](#metadata-property-backblazeb2-component) collection. Keep in mind that the server enforces a limit of 10 metadata items per file. - If the [ClientModifiedTime](#ClientModifiedTime) configuration setting is non-empty: an additional metadata item with its value (which *does* count towards the 10 item limit). - The value of the [ContentType](#contenttype-property-backblazeb2-component) property. If [SetUploadStream](#setuploadstream-method-backblazeb2-component) has been used to set an upload stream, it will take priority as the data source. If [LocalFile](#localfile-property-backblazeb2-component) is set the file will be uploaded from the specified path. If [LocalFile](#localfile-property-backblazeb2-component) is not set the data in [FileData](#filedata-property-backblazeb2-component) will be used. To encrypt the file before uploading it, set [EncryptionAlgorithm](#encryptionalgorithm-property-backblazeb2-component) and [EncryptionPassword](#encryptionpassword-property-backblazeb2-component). The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. ### Automatic Multipart Uploads If more than [SimpleUploadLimit](#SimpleUploadLimit) bytes of data are provided, the component will automatically perform a multipart upload by splitting the data up into parts (sized according to the [FragmentSize](#FragmentSize) configuration setting) and uploading them individually. To accomplish this, the component automatically makes calls to [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), [UploadPart](#uploadpart-method-backblazeb2-component), and [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component) internally; tracks upload state information using the [ResumableUploadState](#ResumableUploadState) configuration setting; and tracks how much data has been uploaded using the [StartByte](#startbyte-property-backblazeb2-component) property. The [FragmentComplete](#fragmentcomplete-event-backblazeb2-component) event will fire after each part is uploaded. If, during an automatic multipart upload, any individual request fails, the upload can be resumed be calling this method again with the same parameters, so long as [ResumableUploadState](#ResumableUploadState) and [StartByte](#startbyte-property-backblazeb2-component) contain the same values as they did when the upload was interrupted. When an automatic multipart upload completes successfully, [ResumableUploadState](#ResumableUploadState) is cleared and [StartByte](#startbyte-property-backblazeb2-component) is reset to *0*. # UploadPart Method ([BackblazeB2](#backblazeb2-component) Component) Uploads a multipart upload part. ## Syntax ```text public void UploadPart(string multipartFileId, int partNumber); Async Version public async Task UploadPart(string multipartFileId, int partNumber); public async Task UploadPart(string multipartFileId, int partNumber, CancellationToken cancellationToken); ``` ## Remarks This method uploads a new part for the multipart file upload specified by *MultipartFileId*. The part's number is specified by *PartNumber*; it must be a value in the range *1* to *10000*, inclusive. If the specified multipart upload already has a part with the given *PartNumber*, it is replaced with the one created by this request. The data to upload is taken from either the stream set using [SetUploadStream](#setuploadstream-method-backblazeb2-component), [LocalFile](#localfile-property-backblazeb2-component), or [FileData](#filedata-property-backblazeb2-component) (whichever data is found in first, when checked in that order). All parts must be between 5MB and 5GB in size (except for the last part, which can be as small as 1 byte). The currently-authenticated application key must have the *writeFiles* capability to call this method successfully, otherwise the server will return an error. Refer to the [Account](#account-property-backblazeb2-component).[Capabilities](#B2Account_f_Capabilities) field for more information. # AppKeyList Event ([BackblazeB2](#backblazeb2-component) Component) Fires once for each application key returned when listing application keys. ## Syntax ```text public event OnAppKeyListHandler OnAppKeyList; public delegate void OnAppKeyListHandler(object sender, BackblazeB2AppKeyListEventArgs e); public class BackblazeB2AppKeyListEventArgs : EventArgs { public string KeyId { get; } public string KeyName { get; } public string Capabilities { get; } public string AllowedBucketId { get; } public string AllowedPrefix { get; } public long ExpirationTime { get; } } ``` ## Remarks This event fires once for each application key returned when [ListAppKeys](#listappkeys-method-backblazeb2-component) is called. *KeyId* reflects the unique Id of the application key. *KeyName* reflects the name that was given to the application key when it was created. *Capabilities* reflects the capabilities that the application key has. It is formatted as a comma-separated list of one or more of the following: | Capability String | Related Methods | | --- | --- | | deleteBuckets | [DeleteBucket](#deletebucket-method-backblazeb2-component) | | deleteFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) | | deleteKeys | [DeleteAppKey](#deleteappkey-method-backblazeb2-component) | | listBuckets | [GetBucketInfo](#getbucketinfo-method-backblazeb2-component), [ListBuckets](#listbuckets-method-backblazeb2-component) | | listFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) | | listKeys | [ListAppKeys](#listappkeys-method-backblazeb2-component) | | readFiles | [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [DownloadFile](#downloadfile-method-backblazeb2-component), [DownloadFileById](#downloadfilebyid-method-backblazeb2-component), [GetFileInfo](#getfileinfo-method-backblazeb2-component) | | shareFiles | [GetDownloadAuthToken](#getdownloadauthtoken-method-backblazeb2-component) | | writeBuckets | [CreateBucket](#createbucket-method-backblazeb2-component), [UpdateBucket](#updatebucket-method-backblazeb2-component) | | writeFiles | [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component), [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component), [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [HideFile](#hidefile-method-backblazeb2-component), [ListParts](#listparts-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), [UploadFile](#uploadfile-method-backblazeb2-component), [UploadPart](#uploadpart-method-backblazeb2-component) | | writeKeys | [CreateAppKey](#createappkey-method-backblazeb2-component) | *AllowedBucketId* reflects the Id of the bucket that the application key is restricted to. It will be empty if the application key is not restricted to any specific bucket. *AllowedPrefix* reflects the file name prefix that the application key is restricted to. It will be empty if the application key is not restricted to a specific file name prefix. *ExpirationTime* reflects the expiration time of the application key, in milliseconds relative to the Unix epoch. It will be *-1* if the application key does not expire. # BucketList Event ([BackblazeB2](#backblazeb2-component) Component) Fires once for each bucket returned when listing buckets. ## Syntax ```text public event OnBucketListHandler OnBucketList; public delegate void OnBucketListHandler(object sender, BackblazeB2BucketListEventArgs e); public class BackblazeB2BucketListEventArgs : EventArgs { public string Id { get; } public string Name { get; } public string Kind { get; } public long Revision { get; } } ``` ## Remarks This event fires once for each bucket returned when [ListBuckets](#listbuckets-method-backblazeb2-component) is called. *Id* reflects the unique Id of the bucket. *Name* reflects the name of the bucket. *Kind * reflects the bucket's kind. Possible values are *allPublic*, *allPrivate*, or *snapshot*. *Revision* reflects the bucket's revision number. A bucket's revision number is updated every time the bucket is modified. # EndTransfer Event ([BackblazeB2](#backblazeb2-component) Component) Fired when a document finishes transferring. ## Syntax ```text public event OnEndTransferHandler OnEndTransfer; public delegate void OnEndTransferHandler(object sender, BackblazeB2EndTransferEventArgs e); public class BackblazeB2EndTransferEventArgs : EventArgs { public int Direction { get; } } ``` ## Remarks This event is fired first when the client finishes sending data to the server (in a *POST* or *PUT* request) and then when the document text finishes transferring from the server to the local host. The *Direction* parameter shows whether the client (0) or the server (1) is sending the data. # Error Event ([BackblazeB2](#backblazeb2-component) Component) Fired when information is available about errors during data delivery. ## Syntax ```text public event OnErrorHandler OnError; public delegate void OnErrorHandler(object sender, BackblazeB2ErrorEventArgs e); public class BackblazeB2ErrorEventArgs : EventArgs { public int ErrorCode { get; } public string Description { get; } } ``` ## Remarks The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception. The *ErrorCode* parameter contains an error code, and the *Description* parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-backblazeb2-component) section. # FileList Event ([BackblazeB2](#backblazeb2-component) Component) Fires once for each file returned when listing files. ## Syntax ```text public event OnFileListHandler OnFileList; public delegate void OnFileListHandler(object sender, BackblazeB2FileListEventArgs e); public class BackblazeB2FileListEventArgs : EventArgs { public string Id { get; } public string Name { get; } public string BucketId { get; } public long Size { get; } public string ContentType { get; } public long CreatedTime { get; } public long ModifiedTime { get; } public string Kind { get; } public string SHA1Hash { get; } } ``` ## Remarks This event fires once for each file returned when [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) is called. *Id* reflects the Id of the file. Always empty when *Kind* is *folder*. *Name* reflects the name of the file. *BucketId* reflects the Id of the bucket that the file is in. *Size* reflects the size of the file, in bytes. Always *0* when *Kind* is *folder*, *hide*, or *start*. *ContentType* reflects the content type of the file. Always *application/x-bz-hide-marker* when *Kind* is *hide*; and empty when *Kind* is *folder*. *CreatedTime* reflects the file's creation time, in milliseconds relative to the Unix epoch. Always *0* when *Kind* is *folder*. *ModifiedTime* reflects the file's last modified time, in milliseconds relative to the Unix epoch. (Note that this parameter will only be populated if a *src_last_modified_millis* metadata item is included for the file, and if that metadata item's value can be parsed as a 64-bit integer; otherwise, it will be *-1*. Refer to the [ClientModifiedTime](#ClientModifiedTime) configuration setting for more information.) *Kind* reflects the file's kind. Possible values are: | | | | --- | --- | | folder | A "folder" (only applicable when listing files with a [Delimiter](#delimiter-property-backblazeb2-component)). | | hide | A hide marker file version created by [HideFile](#hidefile-method-backblazeb2-component). | | start | A multipart file upload that has not been completed or abandoned yet. | | upload | An file that has been uploaded (either directly, or via a multipart upload). | *SHA1Hash* reflects a hex-encoded SHA1 hash of the file's contents, or empty string if such a hash is not available. Always empty when *Kind* is *folder* or *hide*. # FragmentComplete Event ([BackblazeB2](#backblazeb2-component) Component) Fires after each part in an automatic multipart upload is complete. ## Syntax ```text public event OnFragmentCompleteHandler OnFragmentComplete; public delegate void OnFragmentCompleteHandler(object sender, BackblazeB2FragmentCompleteEventArgs e); public class BackblazeB2FragmentCompleteEventArgs : EventArgs { public int FragmentNumber { get; } public int FragmentCount { get; } public bool Interrupt { get; set; } } ``` ## Remarks If, when [UploadFile](#uploadfile-method-backblazeb2-component) is called, more than [SimpleUploadLimit](#SimpleUploadLimit) bytes of upload data are present, the component will automatically split the upload data up into parts and perform a multipart upload. During the overall upload process, this event will fire after each part is uploaded, providing an indication of overall upload progress. *FragmentNumber* is the number of the current part that has completed. This value starts at *1*. *FragmentCount* is the total number of parts that will be uploaded. *Interrupt* can be set to *true* to interrupt the upload. The upload may be resumed later. Refer to [UploadFile](#uploadfile-method-backblazeb2-component) for more information. # Header Event ([BackblazeB2](#backblazeb2-component) Component) Fired every time a header line comes in. ## Syntax ```text public event OnHeaderHandler OnHeader; public delegate void OnHeaderHandler(object sender, BackblazeB2HeaderEventArgs e); public class BackblazeB2HeaderEventArgs : EventArgs { public string Field { get; } public string Value { get; } } ``` ## Remarks The *Field* parameter contains the name of the HTTP header (which is the same as it is delivered). The *Value* parameter contains the header contents. If the header line being retrieved is a continuation header line, then the *Field* parameter contains "" (empty string). # Log Event ([BackblazeB2](#backblazeb2-component) Component) Fired once for each log message. ## Syntax ```text public event OnLogHandler OnLog; public delegate void OnLogHandler(object sender, BackblazeB2LogEventArgs e); public class BackblazeB2LogEventArgs : EventArgs { public int LogLevel { get; } public string Message { get; } public string LogType { get; } } ``` ## Remarks This event is fired once for each log message generated by the component. The verbosity is controlled by the [LogLevel](#LogLevel) setting. *LogLevel* indicates the level of message. Possible values are as follows: | | | | --- | --- | | 0 (None) | No events are logged. | | 1 (Info - default) | Informational events are logged. | | 2 (Verbose) | Detailed data are logged. | | 3 (Debug) | Debug data are logged. | The value 1 (Info) logs basic information, including the URL, HTTP version, and status details. The value 2 (Verbose) logs additional information about the request and response. The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any). *Message* is the log entry. *LogType* identifies the type of log entry. Possible values are as follows: - "Info" - "RequestHeaders" - "ResponseHeaders" - "RequestBody" - "ResponseBody" - "ProxyRequest" - "ProxyResponse" - "FirewallRequest" - "FirewallResponse" # MetadataList Event ([BackblazeB2](#backblazeb2-component) Component) Fires once for each metadata item returned when bucket or file information and metadata is retrieved. ## Syntax ```text public event OnMetadataListHandler OnMetadataList; public delegate void OnMetadataListHandler(object sender, BackblazeB2MetadataListEventArgs e); public class BackblazeB2MetadataListEventArgs : EventArgs { public string BucketId { get; } public string FileId { get; } public string Name { get; } public string Value { get; } } ``` ## Remarks This event fires once for each metadata item returned when [GetBucketInfo](#getbucketinfo-method-backblazeb2-component) or [GetFileInfo](#getfileinfo-method-backblazeb2-component) is called. If the [ListWithMetadata](#ListWithMetadata) configuration setting is enabled, it also fires as metadata for each individual bucket or file is returned when [ListBuckets](#listbuckets-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) is called. *BucketId* reflects the Id of the bucket that the file is in (if *FileId* is non-empty), or that the metadata item is associated with (if *FileId* is empty). *FileId*, if non-empty, reflects the Id of the file that the metadata item is associated with. *Name* reflects the name of the metadata item. *Value* reflects the value of the metadata item. # PartList Event ([BackblazeB2](#backblazeb2-component) Component) Fires once for each part returned when listing a multipart upload's parts. ## Syntax ```text public event OnPartListHandler OnPartList; public delegate void OnPartListHandler(object sender, BackblazeB2PartListEventArgs e); public class BackblazeB2PartListEventArgs : EventArgs { public int PartNumber { get; } public string MultipartFileId { get; } public long Size { get; } public long CreatedTime { get; } public string SHA1Hash { get; } } ``` ## Remarks This event fires once for each part returned when [ListParts](#listparts-method-backblazeb2-component) is called. *PartNumber* reflects the part's number. *MultipartFileId* reflects the Id of the multipart file upload that the part is a part of. *Size* reflects the size of the part, in bytes. *CreatedTime* reflects the part's creation time (i.e., upload time), in milliseconds relative to the Unix epoch. *SHA1Hash* reflects a hex-encoded SHA1 hash of the part's contents. # Progress Event ([BackblazeB2](#backblazeb2-component) Component) Fires during an upload or download to indicate transfer progress. ## Syntax ```text public event OnProgressHandler OnProgress; public delegate void OnProgressHandler(object sender, BackblazeB2ProgressEventArgs e); public class BackblazeB2ProgressEventArgs : EventArgs { public int Direction { get; } public long BytesTransferred { get; } public long TotalBytes { get; } public int PercentDone { get; } } ``` ## Remarks This event fires during an upload or download to indicate the progress of the transfer of the entire request. By default, this event will fire each time *PercentDone* increases by one percent; the [ProgressStep](#ProgressStep) configuration setting can be used to alter this behavior. *Direction* indicates whether the transfer is an upload (*0*) or a download (*1*). *BytesTransferred* reflects the number of bytes that have been transferred so far, or *0* if the transfer is starting (however, see note below). *TotalBytes* reflects the total number of bytes that are to be transferred, or *-1* if the total is unknown. This amount includes the size of everything in the request like HTTP headers. *PercentDone* reflects the overall progress of the transfer, or *-1* if the progress cannot be calculated. NOTE: By default, the component tracks transfer progress *absolutely*. If a transfer is interrupted and later resumed, the values reported by this event upon and after resumption will account for the data that was transferred *before* the interruption. For example, if 10MB of data was successfully transferred before the interruption, then this event will fire with a *BytesTransferred* value of *10485760* (10MB) when the transfer is first resumed, and then continue to fire with successively greater values as usual. This behavior can be changed by disabling the [ProgressAbsolute](#ProgressAbsolute) configuration setting, in which case the component will treat resumed transfers as "new" transfers. In this case, the *BytesTransferred* parameter will always be *0* the first time this event fires, regardless of whether the transfer is new or being resumed. # SSLServerAuthentication Event ([BackblazeB2](#backblazeb2-component) Component) Fired after the server presents its certificate to the client. ## Syntax ```text public event OnSSLServerAuthenticationHandler OnSSLServerAuthentication; public delegate void OnSSLServerAuthenticationHandler(object sender, BackblazeB2SSLServerAuthenticationEventArgs e); public class BackblazeB2SSLServerAuthenticationEventArgs : EventArgs { public string CertEncoded { get; } public byte[] CertEncodedB { get; } public string CertSubject { get; } public string CertIssuer { get; } public string Status { get; } public bool Accept { get; set; } } ``` ## Remarks During this event, the client can decide whether or not to continue with the connection process. The *Accept* parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue. When *Accept* is False, *Status* shows why the verification failed (otherwise, *Status* contains the string *OK*). If it is decided to continue, you can override and accept the certificate by setting the *Accept* parameter to True. # SSLStatus Event ([BackblazeB2](#backblazeb2-component) Component) Fired when secure connection progress messages are available. ## Syntax ```text public event OnSSLStatusHandler OnSSLStatus; public delegate void OnSSLStatusHandler(object sender, BackblazeB2SSLStatusEventArgs e); public class BackblazeB2SSLStatusEventArgs : EventArgs { public string Message { get; } } ``` ## Remarks The event is fired for informational and logging purposes only. This event tracks the progress of the connection. # StartTransfer Event ([BackblazeB2](#backblazeb2-component) Component) Fired when a document starts transferring (after the headers). ## Syntax ```text public event OnStartTransferHandler OnStartTransfer; public delegate void OnStartTransferHandler(object sender, BackblazeB2StartTransferEventArgs e); public class BackblazeB2StartTransferEventArgs : EventArgs { public int Direction { get; } } ``` ## Remarks This event is fired first when the client starts sending data to the server (in a *POST* or *PUT* request) and then when the document text starts transferring from the server to the local host. The *Direction* parameter shows whether the client (0) or the server (1) is sending the data. # Transfer Event ([BackblazeB2](#backblazeb2-component) Component) Fired while a document transfers (delivers document). ## Syntax ```text public event OnTransferHandler OnTransfer; public delegate void OnTransferHandler(object sender, BackblazeB2TransferEventArgs e); public class BackblazeB2TransferEventArgs : EventArgs { public int Direction { get; } public long BytesTransferred { get; } public int PercentDone { get; } public string Text { get; } public byte[] TextB { get; } } ``` ## Remarks The *Text* parameter contains the portion of the document text being received. It is empty if data are being posted to the server. The *BytesTransferred* parameter contains the number of bytes transferred in this *Direction* since the beginning of the document text (excluding HTTP response headers). The *Direction* parameter shows whether the client (0) or the server (1) is sending the data. The *PercentDone* parameter shows the progress of the transfer in the corresponding direction. If *PercentDone* can not be calculated the value will be -1. NOTE: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance. # B2Account Type Backblaze B2 account information. ## Remarks This type provides information about a Backblaze B2 account and the currently-authenticated application key. The following fields are available: - [AccountId](#B2Account_f_AccountId) - [AllowedBucketId](#B2Account_f_AllowedBucketId) - [AllowedBucketName](#B2Account_f_AllowedBucketName) - [AllowedPrefix](#B2Account_f_AllowedPrefix) - [AuthToken](#B2Account_f_AuthToken) - [Capabilities](#B2Account_f_Capabilities) - [MinPartSize](#B2Account_f_MinPartSize) - [RecPartSize](#B2Account_f_RecPartSize) ## Fields **AccountId** *string (read-only)* Default: "" The Id of the account. This field reflects the Id of the account that the currently-authenticated application key belongs to. **AllowedBucketId** *string (read-only)* Default: "" The Id of the bucket that the application key is restricted to. This field reflects the Id of the bucket that the currently-authenticated application key is restricted to. It will be empty if the currently-authenticated application key is not restricted to any specific bucket. **AllowedBucketName** *string (read-only)* Default: "" The name of the bucket that the application key is restricted to. This field reflects the name of the bucket that the currently-authenticated application key is restricted to. It will be empty if the currently-authenticated application key is not restricted to any specific bucket; or if it *is*, but the bucket has been deleted ([AllowedBucketId](#B2Account_f_AllowedBucketId) will still be populated in this case). **AllowedPrefix** *string (read-only)* Default: "" The file name prefix that the application key is restricted to. This field reflects the file name prefix that the currently-authenticated application key is restricted to. It will be empty if the currently-authenticated application key is not restricted to a specific file name prefix. **AuthToken** *string (read-only)* Default: "" The authorization token that will be used to authorize requests. This field reflects the actual authorization token that will be used to authorize requests sent to the server. This token is obtained by calling [Authorize](#authorize-method-backblazeb2-component) to authenticate to the server using the current [ApplicationKey](#applicationkey-property-backblazeb2-component) and [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) values; it is valid for up to 24 hours. **Capabilities** *string (read-only)* Default: "" The capabilities that the application key has. This field reflects the capabilities that the currently-authenticated application key has. It is formatted as a comma-separated list of one or more of the following strings: | Capability String | Related Methods | | --- | --- | | deleteBuckets | [DeleteBucket](#deletebucket-method-backblazeb2-component) | | deleteFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) | | deleteKeys | [DeleteAppKey](#deleteappkey-method-backblazeb2-component) | | listBuckets | [GetBucketInfo](#getbucketinfo-method-backblazeb2-component), [ListBuckets](#listbuckets-method-backblazeb2-component) | | listFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) | | listKeys | [ListAppKeys](#listappkeys-method-backblazeb2-component) | | readFiles | [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [DownloadFile](#downloadfile-method-backblazeb2-component), [DownloadFileById](#downloadfilebyid-method-backblazeb2-component), [GetFileInfo](#getfileinfo-method-backblazeb2-component) | | shareFiles | [GetDownloadAuthToken](#getdownloadauthtoken-method-backblazeb2-component) | | writeBuckets | [CreateBucket](#createbucket-method-backblazeb2-component), [UpdateBucket](#updatebucket-method-backblazeb2-component) | | writeFiles | [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component), [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component), [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [HideFile](#hidefile-method-backblazeb2-component), [ListParts](#listparts-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), [UploadFile](#uploadfile-method-backblazeb2-component), [UploadPart](#uploadpart-method-backblazeb2-component) | | writeKeys | [CreateAppKey](#createappkey-method-backblazeb2-component) | **MinPartSize** *long (read-only)* Default: -1 The minimum allowed multipart upload part size. This field reflects the minimum allowed multipart upload part size, in bytes. **RecPartSize** *long (read-only)* Default: -1 The recommended multipart upload part size. This field reflects the recommended multipart upload part size, in bytes. # B2AppKey Type A Backblaze B2 application key. ## Remarks This type represents a Backblaze B2 application key. The following fields are available: - [AllowedBucketId](#B2AppKey_f_AllowedBucketId) - [AllowedPrefix](#B2AppKey_f_AllowedPrefix) - [Capabilities](#B2AppKey_f_Capabilities) - [ExpirationTime](#B2AppKey_f_ExpirationTime) - [KeyId](#B2AppKey_f_KeyId) - [Name](#B2AppKey_f_Name) ## Fields **AllowedBucketId** *string (read-only)* Default: "" The Id of the bucket that the application key is restricted to. This field reflects the Id of the bucket that the application key is restricted to. It will be empty if the application key is not restricted to any specific bucket. **AllowedPrefix** *string (read-only)* Default: "" The file name prefix that the application key is restricted to. This field reflects the file name prefix that the application key is restricted to. It will be empty if the application key is not restricted to a specific file name prefix. **Capabilities** *string (read-only)* Default: "" The capabilities that the application key has. This field reflects the capabilities that the application key has. It is formatted as a comma-separated list of one or more of the following: | Capability String | Related Methods | | --- | --- | | deleteBuckets | [DeleteBucket](#deletebucket-method-backblazeb2-component) | | deleteFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [DeleteFileVersion](#deletefileversion-method-backblazeb2-component) | | deleteKeys | [DeleteAppKey](#deleteappkey-method-backblazeb2-component) | | listBuckets | [GetBucketInfo](#getbucketinfo-method-backblazeb2-component), [ListBuckets](#listbuckets-method-backblazeb2-component) | | listFiles | [DeleteFile](#deletefile-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) | | listKeys | [ListAppKeys](#listappkeys-method-backblazeb2-component) | | readFiles | [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [DownloadFile](#downloadfile-method-backblazeb2-component), [DownloadFileById](#downloadfilebyid-method-backblazeb2-component), [GetFileInfo](#getfileinfo-method-backblazeb2-component) | | shareFiles | [GetDownloadAuthToken](#getdownloadauthtoken-method-backblazeb2-component) | | writeBuckets | [CreateBucket](#createbucket-method-backblazeb2-component), [UpdateBucket](#updatebucket-method-backblazeb2-component) | | writeFiles | [AbortMultipartUpload](#abortmultipartupload-method-backblazeb2-component), [CompleteMultipartUpload](#completemultipartupload-method-backblazeb2-component), [CopyFile](#copyfile-method-backblazeb2-component), [CopyPart](#copypart-method-backblazeb2-component), [HideFile](#hidefile-method-backblazeb2-component), [ListParts](#listparts-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), [UploadFile](#uploadfile-method-backblazeb2-component), [UploadPart](#uploadpart-method-backblazeb2-component) | | writeKeys | [CreateAppKey](#createappkey-method-backblazeb2-component) | **ExpirationTime** *long (read-only)* Default: -1 The application key's expiration time. This field reflects the expiration time of the application key, in milliseconds relative to the Unix epoch. It will be *-1* if the application key does not expire. **KeyId** *string (read-only)* Default: "" The Id of the application key. This field reflects the unique Id of the application key. **Name** *string (read-only)* Default: "" The name of the application key. This field reflects the name assigned to the application key when it was created. Application key names are not used for identification, so there is no requirement for them to be unique. # B2Bucket Type A Backblaze B2 bucket. ## Remarks This type represents a Backblaze B2 bucket. The following fields are available: - [Id](#B2Bucket_f_Id) - [Kind](#B2Bucket_f_Kind) - [Name](#B2Bucket_f_Name) - [Revision](#B2Bucket_f_Revision) ## Fields **Id** *string (read-only)* Default: "" The Id of the bucket. This field reflects the unique Id of the bucket. **Kind** *string (read-only)* Default: "" The kind of bucket. This field reflects the bucket's kind. Possible values are *allPublic*, *allPrivate*, or *snapshot*. **Name** *string (read-only)* Default: "" The name of the bucket. This field reflects the name of the bucket. **Revision** *long (read-only)* Default: -1 The revision number of the bucket. This field reflects the bucket's revision number. A bucket's revision number is updated every time the bucket is modified. # B2File Type A Backblaze B2 file. ## Remarks This type represents a Backblaze B2 file. The following fields are available: - [BucketId](#B2File_f_BucketId) - [ContentType](#B2File_f_ContentType) - [CreatedTime](#B2File_f_CreatedTime) - [Id](#B2File_f_Id) - [Kind](#B2File_f_Kind) - [MD5Hash](#B2File_f_MD5Hash) - [ModifiedTime](#B2File_f_ModifiedTime) - [Name](#B2File_f_Name) - [SHA1Hash](#B2File_f_SHA1Hash) - [Size](#B2File_f_Size) ## Fields **BucketId** *string (read-only)* Default: "" The Id of the bucket that the file is in. This field reflects the Id of the bucket that the file is in. **ContentType** *string (read-only)* Default: "" The content type of the file. This field reflects the content type of the file. Always *application/x-bz-hide-marker* when [Kind](#B2File_f_Kind) is *hide*; and empty when [Kind](#B2File_f_Kind) is *folder*. **CreatedTime** *long (read-only)* Default: -1 The file's creation time. This field reflects the file's creation time, in milliseconds relative to the Unix epoch. Always *0* when [Kind](#B2File_f_Kind) is *folder*. **Id** *string (read-only)* Default: "" The Id of the file. This field reflects the Id of the file. Always empty when [Kind](#B2File_f_Kind) is *folder*. **Kind** *string (read-only)* Default: "" The kind of file. This field reflects the file's kind. Possible values are: | | | | --- | --- | | folder | A "folder" (only applicable when listing files with a [Delimiter](#delimiter-property-backblazeb2-component)). | | hide | A hide marker file version created by [HideFile](#hidefile-method-backblazeb2-component). | | start | A multipart file upload that has not been completed or abandoned yet. | | upload | An file that has been uploaded (either directly, or via a multipart upload). | **MD5Hash** *string (read-only)* Default: "" An MD5 hash of the file's contents. This field reflects a hex-encoded MD5 hash of the file's contents, or empty string if such a hash is not available. **ModifiedTime** *long (read-only)* Default: -1 The file's last modified time. This field reflects the file's last modified time, in milliseconds relative to the Unix epoch. Note that this field will only be populated if a *src_last_modified_millis* metadata item is included for the file, and if that metadata item's value can be parsed as a 64-bit integer; otherwise, it will be *-1*. Refer to the [ClientModifiedTime](#ClientModifiedTime) configuration setting for more information. **Name** *string (read-only)* Default: "" The name of the file. This field reflects the name of the file. **SHA1Hash** *string (read-only)* Default: "" A SHA1 hash of the file's contents. This field reflects a hex-encoded SHA1 hash of the file's contents, or empty string if such a hash is not available. Always empty if [Kind](#B2File_f_Kind) is *folder* or *hide*. **Size** *long (read-only)* Default: 0 The file's size. This field reflects the file's size, in bytes. Always *0* when [Kind](#B2File_f_Kind) is *folder*, *hide*, or *start*. # B2Metadata Type A Backblaze B2 metadata item. ## Remarks This type represents a Backblaze B2 metadata item. The following fields are available: - [Name](#B2Metadata_f_Name) - [Value](#B2Metadata_f_Value) ## Fields **Name** *string* Default: "" The name of the metadata item. This field specifies the name of the metadata item. Metadata item names may be up to 50 characters in length, and must consist solely of letters, numbers, hyphens (*-*), and underscores (*_*). The server stores all metadata item names in lowercase. A metadata item's name cannot start with *b2-* unless said name is one those explicitly defined by the Backblaze B2 API documentation. Keep in mind that the [Value](#B2Metadata_f_Value) of such a metadata item must comply with the format specified by the Backblaze B2 API documentation as well, otherwise the server will reject it. **Value** *string* Default: "" The value of the metadata item. This field specifies the value of the metadata item. ## Constructors ```text public B2Metadata(); ``` ```text public B2Metadata(string name, string value); ``` # B2Part Type A Backblaze B2 multipart upload part. ## Remarks This type represents a Backblaze B2 multipart upload part. The following fields are available: - [CreatedTime](#B2Part_f_CreatedTime) - [MD5Hash](#B2Part_f_MD5Hash) - [PartNumber](#B2Part_f_PartNumber) - [SHA1Hash](#B2Part_f_SHA1Hash) - [Size](#B2Part_f_Size) ## Fields **CreatedTime** *long (read-only)* Default: -1 The part's creation time. This field reflects the part's creation time (i.e., upload time), in milliseconds relative to the Unix epoch. **MD5Hash** *string (read-only)* Default: "" An MD5 hash of the part's contents. This field reflects a hex-encoded MD5 hash of the part's contents, or empty string if such a hash is not available. **PartNumber** *int (read-only)* Default: -1 The number of the part. This field specifies the number of the part. Must a be a value in the range *1* to *10000*, inclusive. **SHA1Hash** *string (read-only)* Default: "" A SHA1 hash of the part's contents. This field reflects a hex-encoded SHA1 hash of the part's contents. **Size** *long (read-only)* Default: 0 The part's size. This field reflects the part's size, in bytes. # Certificate Type This is the digital certificate being used. ## Remarks This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates. The following fields are available: - [EffectiveDate](#Certificate_f_EffectiveDate) - [ExpirationDate](#Certificate_f_ExpirationDate) - [ExtendedKeyUsage](#Certificate_f_ExtendedKeyUsage) - [Fingerprint](#Certificate_f_Fingerprint) - [FingerprintSHA1](#Certificate_f_FingerprintSHA1) - [FingerprintSHA256](#Certificate_f_FingerprintSHA256) - [Issuer](#Certificate_f_Issuer) - [PrivateKey](#Certificate_f_PrivateKey) - [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) - [PrivateKeyContainer](#Certificate_f_PrivateKeyContainer) - [PublicKey](#Certificate_f_PublicKey) - [PublicKeyAlgorithm](#Certificate_f_PublicKeyAlgorithm) - [PublicKeyLength](#Certificate_f_PublicKeyLength) - [SerialNumber](#Certificate_f_SerialNumber) - [SignatureAlgorithm](#Certificate_f_SignatureAlgorithm) - [Store](#Certificate_f_Store) - [StorePassword](#Certificate_f_StorePassword) - [StoreType](#Certificate_f_StoreType) - [SubjectAltNames](#Certificate_f_SubjectAltNames) - [ThumbprintMD5](#Certificate_f_ThumbprintMD5) - [ThumbprintSHA1](#Certificate_f_ThumbprintSHA1) - [ThumbprintSHA256](#Certificate_f_ThumbprintSHA256) - [Usage](#Certificate_f_Usage) - [UsageFlags](#Certificate_f_UsageFlags) - [Version](#Certificate_f_Version) - [Subject](#Certificate_f_Subject) - [Encoded](#Certificate_f_Encoded) ## Fields **EffectiveDate** *string (read-only)* Default: "" The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date: 23-Jan-2000 15:00:00. **ExpirationDate** *string (read-only)* Default: "" The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date: 23-Jan-2001 15:00:00. **ExtendedKeyUsage** *string (read-only)* Default: "" A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs). **Fingerprint** *string (read-only)* Default: "" The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02* **FingerprintSHA1** *string (read-only)* Default: "" The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84* **FingerprintSHA256** *string (read-only)* Default: "" The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53* **Issuer** *string (read-only)* Default: "" The issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate. **PrivateKey** *string (read-only)* Default: "" The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data. NOTE: The [PrivateKey](#Certificate_f_PrivateKey) may be available but not exportable. In this case, [PrivateKey](#Certificate_f_PrivateKey) returns an empty string. **PrivateKeyAvailable** *bool (read-only)* Default: False Whether a [PrivateKey](#Certificate_f_PrivateKey) is available for the selected certificate. If [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) is True, the certificate may be used for authentication purposes (e.g., server authentication). **PrivateKeyContainer** *string (read-only)* Default: "" The name of the [PrivateKey](#Certificate_f_PrivateKey) container for the certificate (if available). This functionality is available only on Windows platforms. **PublicKey** *string (read-only)* Default: "" The public key of the certificate. The key is provided as PEM/Base64-encoded data. **PublicKeyAlgorithm** *string (read-only)* Default: "" The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm. **PublicKeyLength** *int (read-only)* Default: 0 The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048. **SerialNumber** *string (read-only)* Default: "" The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number. **SignatureAlgorithm** *string (read-only)* Default: "" The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm. **Store** *string* Default: "MY" The name of the certificate store for the client certificate. The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword). [Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). **StoreB** *byte []* Default: "MY" The name of the certificate store for the client certificate. The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword). [Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). **StorePassword** *string* Default: "" If the type of certificate store requires a password, this field is used to specify the password needed to open the certificate store. **StoreType** *CertStoreTypes* Default: 0 The type of certificate store for this certificate. The component supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the component will automatically determine the type. This field can take one of the following values: ```csharp sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll", "123456", // PIN "CN=cert_subject"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` ```csharp certmgr.CertStoreType = CertStoreTypes.cstPKCS11; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; // PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` | | | | --- | --- | | 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. | | 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. | | 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. | | 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. | | 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. | | 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. | | 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. | | 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. | | 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. | | 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. | | 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. | | 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. | | 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. | | 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. | | 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). | | 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). | | 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. | | 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. | | 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). | | 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). | | 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. | | 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. | | 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#certificate-type) object and pass cstPKCS11 as the [StoreType](#Certificate_f_StoreType), the full path of the PKCS#11 DLL as the [Store](#Certificate_f_Store), and the PIN as the [StorePassword](#Certificate_f_StorePassword). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the CertMgr component by calling the ListStoreCertificates method after setting the corresponding properties accordingly. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [Store](#Certificate_f_Store) and set [StorePassword](#Certificate_f_StorePassword) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): | | 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. | **SubjectAltNames** *string (read-only)* Default: "" Comma-separated lists of alternative subject names for the certificate. **ThumbprintMD5** *string (read-only)* Default: "" The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **ThumbprintSHA1** *string (read-only)* Default: "" The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **ThumbprintSHA256** *string (read-only)* Default: "" The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **Usage** *string (read-only)* Default: "" The text description of [UsageFlags](#Certificate_f_UsageFlags). This value will be one or more of the following strings and will be separated by commas: - Digital Signature - Non-Repudiation - Key Encipherment - Data Encipherment - Key Agreement - Certificate Signing - CRL Signing - Encipher Only If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names. **UsageFlags** *int (read-only)* Default: 0 The flags that show intended use for the certificate. The value of [UsageFlags](#Certificate_f_UsageFlags) is a combination of the following flags: | | | | --- | --- | | 0x80 | Digital Signature | | 0x40 | Non-Repudiation | | 0x20 | Key Encipherment | | 0x10 | Data Encipherment | | 0x08 | Key Agreement | | 0x04 | Certificate Signing | | 0x02 | CRL Signing | | 0x01 | Encipher Only | Please see the [Usage](#Certificate_f_Usage) field for a text representation of [UsageFlags](#Certificate_f_UsageFlags). This functionality currently is not available when the provider is OpenSSL. **Version** *string (read-only)* Default: "" The certificate's version number. The possible values are the strings "V1", "V2", and "V3". **Subject** *string* Default: "" The subject of the certificate used for client authentication. This field will be populated with the full subject of the loaded certificate. When loading a certificate, the subject is used to locate the certificate in the store. If an exact match is not found, the store is searched for subjects containing the value of the property. If a match is still not found, the property is set to an empty string, and no certificate is selected. The special value "*" picks a random certificate in the certificate store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows: | Field | Meaning | | --- | --- | | CN | Common Name. This is commonly a hostname like www.server.com. | | O | Organization | | OU | Organizational Unit | | L | Locality | | S | State | | C | Country | | E | Email Address | If a field value contains a comma, it must be quoted. **Encoded** *string* Default: "" The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate. When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string. **EncodedB** *byte []* Default: "" The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate. When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string. ## Constructors ```text public Certificate(); ``` Creates a instance whose properties can be set. ```text public Certificate(string certificateFile); ``` Opens * CertificateFile * and reads out the contents as an X.509 public key. ```text public Certificate(byte[] encoded); ``` Parses * Encoded * as an X.509 public key. ```text public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject, string configurationString); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store. * ConfigurationString * is a newline-separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CryptoAPI option. The default value is True (the key is persisted). "Thumbprint" - an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to the * cstUser * , * cstMachine * , * cstPublicKeyFile * , and * cstPFXFile * store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, string store, string storePassword, byte[] encoded); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will load * Encoded * as an X.509 certificate and search the opened store for a corresponding private key. ```text public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject, string configurationString); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, byte[] encoded); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will load * Encoded * as an X.509 certificate and search the opened store for a corresponding private key. # Firewall Type The firewall the component will connect through. ## Remarks When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall [Host](#Firewall_f_Host) and the [FirewallType](#Firewall_f_FirewallType). The following fields are available: - [AutoDetect](#Firewall_f_AutoDetect) - [FirewallType](#Firewall_f_FirewallType) - [Host](#Firewall_f_Host) - [Password](#Firewall_f_Password) - [Port](#Firewall_f_Port) - [User](#Firewall_f_User) ## Fields **AutoDetect** *bool* Default: False Whether to automatically detect and use firewall system settings, if available. **FirewallType** *FirewallTypes* Default: 0 The type of firewall to connect through. The applicable values are as follows: | | | | --- | --- | | fwNone (0) | No firewall (default setting). | | fwTunnel (1) | Connect through a tunneling proxy. [Port](#Firewall_f_Port) is set to 80. | | fwSOCKS4 (2) | Connect through a SOCKS4 Proxy. [Port](#Firewall_f_Port) is set to 1080. | | fwSOCKS5 (3) | Connect through a SOCKS5 Proxy. [Port](#Firewall_f_Port) is set to 1080. | | fwSOCKS4A (10) | Connect through a SOCKS4A Proxy. [Port](#Firewall_f_Port) is set to 1080. | **Host** *string* Default: "" The name or IP address of the firewall (optional). If a [Host](#Firewall_f_Host) is given, the requested connections will be authenticated through the specified firewall when connecting. If this field is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this field is set to the corresponding address. If the search is not successful, the component throws an exception. **Password** *string* Default: "" A password if authentication is to be used when connecting through the firewall. If [Host](#Firewall_f_Host) is specified, the [User](#Firewall_f_User) and [Password](#Firewall_f_Password) fields are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception. **Port** *int* Default: 0 The Transmission Control Protocol (TCP) port for the firewall [Host](#Firewall_f_Host). See the description of the [Host](#Firewall_f_Host) field for details. NOTE: This field is set automatically when [FirewallType](#Firewall_f_FirewallType) is set to a valid value. See the description of the [FirewallType](#Firewall_f_FirewallType) field for details. **User** *string* Default: "" A username if authentication is to be used when connecting through a firewall. If [Host](#Firewall_f_Host) is specified, this field and the [Password](#Firewall_f_Password) field are used to connect and authenticate to the given [Firewall](#firewall-type). If the authentication fails, the component throws an exception. ## Constructors ```text public Firewall(); ``` # Header Type This is an HTTP header as it is received from the server. ## Remarks When a header is received through a Header event, it is parsed into a [Header](#header-type) type. This type contains a [Field](#Header_f_Field), and its corresponding [Value](#Header_f_Value). The following fields are available: - [Field](#Header_f_Field) - [Value](#Header_f_Value) ## Fields **Field** *string* Default: "" This field contains the name of the HTTP [Header](#header-type) (this is the same case as it is delivered). **Value** *string* Default: "" This field contains the [Header](#header-type) contents. ## Constructors ```text public Header(); ``` ```text public Header(string field, string value); ``` # Proxy Type The proxy the component will connect to. ## Remarks When connecting through a proxy, this type is used to specify different properties of the proxy, such as the [Server](#Proxy_f_Server) and the [AuthScheme](#Proxy_f_AuthScheme). The following fields are available: - [AuthScheme](#Proxy_f_AuthScheme) - [AutoDetect](#Proxy_f_AutoDetect) - [Password](#Proxy_f_Password) - [Port](#Proxy_f_Port) - [Server](#Proxy_f_Server) - [SSL](#Proxy_f_SSL) - [User](#Proxy_f_User) ## Fields **AuthScheme** *ProxyAuthSchemes* Default: 0 The type of authorization to perform when connecting to the proxy. This is used only when the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are set. [AuthScheme](#Proxy_f_AuthScheme) should be set to authNone (3) when no authentication is expected. By default, [AuthScheme](#Proxy_f_AuthScheme) is authBasic (0), and if the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are set, the component will attempt basic authentication. If [AuthScheme](#Proxy_f_AuthScheme) is set to authDigest (1), digest authentication will be attempted instead. If [AuthScheme](#Proxy_f_AuthScheme) is set to authProprietary (2), then the authorization token will not be generated by the component. Look at the configuration file for the component being used to find more information about manually setting this token. If [AuthScheme](#Proxy_f_AuthScheme) is set to authNtlm (4), NTLM authentication will be used. For security reasons, setting this field will clear the values of [User](#Proxy_f_User) and [Password](#Proxy_f_Password). **AutoDetect** *bool* Default: False Whether to automatically detect and use proxy system settings, if available. The default value is *false*. **Password** *string* Default: "" A password if authentication is to be used for the proxy. If [AuthScheme](#Proxy_f_AuthScheme) is set to Basic Authentication, the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are Base64 encoded and the proxy authentication token will be generated in the form *Basic [encoded-user-password]*. If [AuthScheme](#Proxy_f_AuthScheme) is set to Digest Authentication, the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are used to respond to the Digest Authentication challenge from the server. If [AuthScheme](#Proxy_f_AuthScheme) is set to NTLM Authentication, the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are used to authenticate through NTLM negotiation. **Port** *int* Default: 80 The Transmission Control Protocol (TCP) port for the proxy [Server](#Proxy_f_Server) (default 80). See the description of the [Server](#Proxy_f_Server) field for details. **Server** *string* Default: "" If a proxy [Server](#Proxy_f_Server) is given, then the HTTP request is sent to the proxy instead of the server otherwise specified. If the [Server](#Proxy_f_Server) field is set to a domain name, a DNS request is initiated. Upon successful termination of the request, the [Server](#Proxy_f_Server) field is set to the corresponding address. If the search is not successful, an error is returned. **SSL** *ProxySSLTypes* Default: 0 When to use a Secure Sockets Layer (SSL) for the connection to the proxy. The applicable values are as follows: | | | | --- | --- | | psAutomatic (0) | Default setting. If the URL is an https URL, the component will use the psTunnel option. If the URL is an http URL, the component will use the psNever option. | | psAlways (1) | The connection is always SSL-enabled. | | psNever (2) | The connection is not SSL-enabled. | | psTunnel (3) | The connection is made through a tunneling (HTTP) proxy. | **User** *string* Default: "" A username if authentication is to be used for the proxy. If [AuthScheme](#Proxy_f_AuthScheme) is set to Basic Authentication, the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are Base64 encoded and the proxy authentication token will be generated in the form *Basic [encoded-user-password]*. If [AuthScheme](#Proxy_f_AuthScheme) is set to Digest Authentication, the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are used to respond to the Digest Authentication challenge from the server. If [AuthScheme](#Proxy_f_AuthScheme) is set to NTLM Authentication, the [User](#Proxy_f_User) and [Password](#Proxy_f_Password) fields are used to authenticate through NTLM negotiation. ## Constructors ```text public Proxy(); ``` ```text public Proxy(string server, int port); ``` ```text public Proxy(string server, int port, string user, string password); ``` # QueryParam Type A query parameter to send in the request. ## Remarks This type represents a query parameter to send in the request. The following fields are available: - [Name](#QueryParam_f_Name) - [Value](#QueryParam_f_Value) ## Fields **Name** *string* Default: "" The name of the query parameter. This field specifies the name of the query parameter. **Value** *string* Default: "" The value of the query parameter. This field specifies the value of the query parameter. The component will automatically URL-encode this value when sending the request. ## Constructors ```text public QueryParam(); ``` ```text public QueryParam(string name, string value); ``` # Config Settings ([BackblazeB2](#backblazeb2-component) Component) The component accepts one or more of the following *configuration settings*. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these *internal properties* is provided through the [Config](#config-method-backblazeb2-component) method. ### BackblazeB2 Config Settings **AccumulatePages**: Whether the component should accumulate subsequent pages of results when listing them.This setting controls how the component behaves when listing multiple pages of results. If this setting is enabled, each successive page of results will be appended to the appropriate collection property until the last page of results has been listed (at which point the next list call will cause said collection to be cleared first). If this setting is disabled, the collection will be cleared every time a page of results is returned. By default, this setting is enabled, allowing all pages of results to be accumulated in the appropriate collection property. **APIURL**: The base URL used for all except download and upload requests.After [Authorize](#authorize-method-backblazeb2-component) is called, this setting can be queried to obtain the base URL that the component will use for all further requests (except for download and upload requests). Note that this setting cannot be changed, it is returned by the server when [Authorize](#authorize-method-backblazeb2-component) is called. **APIVersion**: The Backblaze B2 REST API version being used by the component.This setting can be queried to obtain the version of the Backblaze B2 REST APIs being used by the component. Note that this setting cannot be changed. **ClientModifiedTime**: The client-side last modified time.This setting may be set to a number of milliseconds relative to the Unix epoch before calling [UploadFile](#uploadfile-method-backblazeb2-component), [StartMultipartUpload](#startmultipartupload-method-backblazeb2-component), or (if [SendMetadataOnCopy](#SendMetadataOnCopy) is enabled) [CopyFile](#copyfile-method-backblazeb2-component) to have the component automatically include a metadata item named *src_last_modified_millis* with the given value in the request. This name and value format are the ones recommended by the Backblaze B2 API documentation to allow different clients to interoperate with each other. That said, it is still a normal metadata item as far as the server is concerned; this setting, as well as the [Files](#files-property-backblazeb2-component).[ModifiedTime](#B2File_f_ModifiedTime) field and the [FileList](#filelist-event-backblazeb2-component) event's *ModifiedTime* parameter, are provided as a convenience. If this setting is non-empty when one of the aforementioned methods is called, the component will always add the *src_last_modified_millis* metadata item to the request *before* the items in the [Metadata](#metadata-property-backblazeb2-component) collection. Keep in mind that a file cannot have more than 10 metadata items; the component does not enforce this limit, but the server will return an error if it is exceeded. **DownloadAuthToken**: The download authorization token to use.This setting can be set before calling [DownloadFile](#downloadfile-method-backblazeb2-component) to have the component use the given *download authorization token* to authorize the request instead of the general-purpose [Account](#account-property-backblazeb2-component).[AuthToken](#B2Account_f_AuthToken) for the currently-authenticated application key. Using this setting is only necessary when downloading a file that the currently-authenticated application key does not have access to (either due to restrictions on the key, or because the file is owned by someone else's account). If this setting is set, then the [DownloadURL](#DownloadURL) typically needs to be set as well (just remember to back up its current value first, and restore that value after the download is finished). This setting *is not* applicable to the [DownloadFileById](#downloadfilebyid-method-backblazeb2-component) method. **DownloadTempFile**: The temporary file used when downloading encrypted data.This setting specifies the temporary file used when downloading encrypted data. When downloading encrypted data with [LocalFile](#localfile-property-backblazeb2-component) set, the component will automatically create a temporary file at [TempPath](#TempPath) to hold the encrypted file contents. When the download is complete, the data is decrypted to [LocalFile](#localfile-property-backblazeb2-component). If the download is interrupted, the specified file will hold the partially downloaded encrypted file contents. Before resuming the download, this setting must be set to a valid file containing the partially encrypted file contents. See [DownloadFile](#downloadfile-method-backblazeb2-component) for details. **DownloadURL**: The base URL used for download requests.After [Authorize](#authorize-method-backblazeb2-component) is called, this setting can be queried to obtain the base URL that the component will use for downloading files. This setting's value *should not* be changed manually unless the [DownloadAuthToken](#DownloadAuthToken) setting is being used (in which case the current value should be backed up so that it can be restored later); refer to that setting's documentation for more information. **EncryptionIV**: The initialization vector to be used for encryption/decryption.When encrypting or decrypting a file, this setting may be set to specify the initialization vector. Normally the component will derive this value automatically from [EncryptionPassword](#encryptionpassword-property-backblazeb2-component). This setting accepts a hex encoded value. **EncryptionKey**: The key to use during encryption/decryption.When encrypting or decrypting a file, this setting may be set to specify the key to use. Normally the component will derive this value automatically from [EncryptionPassword](#encryptionpassword-property-backblazeb2-component). This setting accepts a hex encoded value. **EncryptionPasswordKDF**: The KDF algorithm to use during password based encryption and decryption.This setting specified the Key Derivation Function (KDF) used to derive a key from the specified [EncryptionPassword](#encryptionpassword-property-backblazeb2-component). Possible values are: - 0 (default) - PBKDF1 - 1 - PBKDF2 Note: PBKDF1 is not FIPS compliant. When operating in FIPS mode PBKDF2 should be used. **FragmentSize**: The part size to use when uploading a new file.If, when [UploadFile](#uploadfile-method-backblazeb2-component) is called, more than [SimpleUploadLimit](#SimpleUploadLimit) bytes of upload data are present, the component will automatically split the upload data into parts and perform a multipart upload. This setting specifies the part size to use. Valid values are *5242880* (5MB) to *2147483647* (2GB). This setting is automatically set to match the [Account](#account-property-backblazeb2-component).[RecPartSize](#B2Account_f_RecPartSize) field's value (or *2147483647*, whichever is smaller) after the first successful call to [Authorize](#authorize-method-backblazeb2-component) for a particular [ApplicationKey](#applicationkey-property-backblazeb2-component)/[ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) combination. Subsequent calls to [Authorize](#authorize-method-backblazeb2-component) will not change this setting's value unless [ApplicationKey](#applicationkey-property-backblazeb2-component) and/or [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) has changed, or [Reset](#reset-method-backblazeb2-component) has been called. Note that applications may need to increase this setting's value in order to upload very large files; Backblaze B2 only allows 10000 parts to be uploaded for any given multipart upload. If the amount of upload data present when [UploadFile](#uploadfile-method-backblazeb2-component) is called is less than [SimpleUploadLimit](#SimpleUploadLimit) bytes, it will be uploaded directly, so this setting will not apply. **IfRevision**: The revision number that the bucket must currently have in order for a request to succeed.This setting can be set to a bucket revision number before calling [UpdateBucket](#updatebucket-method-backblazeb2-component) to ensure that the request will only succeed if the bucket's current revision number matches the given one. **ListWithMetadata**: Whether to include metadata items when listing buckets, files, etc.This setting indicates whether the component should fire the [MetadataList](#metadatalist-event-backblazeb2-component) event for the metadata items included with each result returned when [ListBuckets](#listbuckets-method-backblazeb2-component), [ListFiles](#listfiles-method-backblazeb2-component), [ListFileVersions](#listfileversions-method-backblazeb2-component), or [ListMultipartUploads](#listmultipartuploads-method-backblazeb2-component) is called. It is disabled by default. Note that calls to the aforementioned methods will never repopulate the [Metadata](#metadata-property-backblazeb2-component) collection, regardless of this setting's value. **MaxAppKeyResults**: The maximum number of results to return when listing application keys.This setting specifies the maximum number of results that should be returned by a call to [ListAppKeys](#listappkeys-method-backblazeb2-component). If this setting is *-1* (default), the server's default (*100*) is used. Acceptable values are *1* to *10000* (inclusive). **MaxPartResults**: The maximum number of results to return when listing parts.This setting specifies the maximum number of results that should be returned by a call to [ListParts](#listparts-method-backblazeb2-component). If this setting is *-1* (default), the server's default (*100*) is used. Acceptable values are *1* to *1000* (inclusive). **MaxResults**: The maximum number of results to return when listing files or file versions.This setting specifies the maximum number of results that should be returned by a call to [ListFiles](#listfiles-method-backblazeb2-component) or [ListFileVersions](#listfileversions-method-backblazeb2-component). If this setting is *-1* (default), the server's default (*100*) is used. Acceptable values are *1* to *10000* (inclusive). **ProgressAbsolute**: Whether the component should track transfer progress absolutely.This setting controls whether the component tracks upload and download progress absolutely or relatively, with regards to the values reported via the [Progress](#progress-event-backblazeb2-component) event when an interrupted transfer is resumed. If this setting is enabled (default), then when a transfer is interrupted and later resumed, the values reported by the [Progress](#progress-event-backblazeb2-component) event will account for the data that was successfully transferred before the interruption. If this setting is disabled, then the component will treat resumed transfers as "new" transfers, and the values reported by the [Progress](#progress-event-backblazeb2-component) event will start at *0* rather than from the number of bytes already transferred. Refer to the [Progress](#progress-event-backblazeb2-component) event for more information. **ProgressStep**: How often the progress event should be fired, in terms of percentage.This setting controls how often the component will fire the [Progress](#progress-event-backblazeb2-component) event during an upload or download, in terms of percentage. Valid values are *0* to *99*, inclusive. The default value, *1*, will cause the [Progress](#progress-event-backblazeb2-component) event to fire each time the event's *PercentDone* parameter value increases by one percent. Setting this setting to *0* will cause the [Progress](#progress-event-backblazeb2-component) event to fire *every* time data is transferred. Note that the [Progress](#progress-event-backblazeb2-component) event will *always* fire once at the beginning and end of a transfer, regardless of this setting's value. Also, if *PercentDone* cannot be calculated for a particular transfer (e.g., for downloads that use chunked transfer encoding), then the component will behave as if this setting were *0* for the duration of the transfer. **RawRequest**: Returns the data that was sent to the server.This setting may be queried after calling any method that sends data to the server to obtain the request data that was transmitted. Such data may be useful for troubleshooting purposes. **RawResponse**: Returns the data that was received from the server.This setting may be queried after calling any method that sends data to the server to obtain the response data that was received. Such data may be useful for troubleshooting purposes. **ResumableUploadState**: Tracks upload state information during an automatic multipart upload.If, when [UploadFile](#uploadfile-method-backblazeb2-component) is called, more than [SimpleUploadLimit](#SimpleUploadLimit) bytes of upload data are present, the component will automatically split the upload data into parts and perform a multipart upload. This setting keeps track of upload state information needed to resume the upload if it's interrupted. Refer to [UploadFile](#uploadfile-method-backblazeb2-component) for more information. **SendMetadataOnCopy**: Whether to send metadata items when copying files.This setting specifies whether the component should include [Metadata](#metadata-property-backblazeb2-component) items, to apply to the *destination* file, when [CopyFile](#copyfile-method-backblazeb2-component) is called. If this setting is disabled (default), or if this setting is enabled but there are no [Metadata](#metadata-property-backblazeb2-component) items (and [ClientModifiedTime](#ClientModifiedTime) is also empty), then the server will copy the source file's current metadata to the destination file. **SimpleUploadLimit**: The maximum data size the component should attempt to upload directly when creating a file.When [UploadFile](#uploadfile-method-backblazeb2-component) is called, the component will automatically split the upload data into parts and perform a multipart upload if its size is greater than the amount specified by this setting. If the upload data size is less than or equal to the amount specified by this setting, it will be uploaded directly. Valid values are *-1* to *5368709120* (5GB), inclusive. This setting is automatically set to twice the [Account](#account-property-backblazeb2-component).[RecPartSize](#B2Account_f_RecPartSize) field's value after the first successful call to [Authorize](#authorize-method-backblazeb2-component) for a particular [ApplicationKey](#applicationkey-property-backblazeb2-component)/[ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) combination. Subsequent calls to [Authorize](#authorize-method-backblazeb2-component) will not change this setting's value unless [ApplicationKey](#applicationkey-property-backblazeb2-component) and/or [ApplicationKeyId](#applicationkeyid-property-backblazeb2-component) has changed, or [Reset](#reset-method-backblazeb2-component) has been called. If this setting is set to *0*, the component will *always* perform a multipart upload to create a file; if it is set to *-1*, the component will *never* perform a multipart upload. **TempPath**: The path to the directory where temporary files are created.This setting specifies the path where temporary files are created when downloading encrypted files. If not specified, the system's temporary directory is used. Refer to [DownloadTempFile](#DownloadTempFile) and [DownloadFile](#downloadfile-method-backblazeb2-component) for more information. **XChildCount**: The number of child elements of the current element.This configuration settings specifies the number of child attributes of the current element. The XChild configuration settings will be indexed from 0 to ([XChildCount](#XChildCount) - 1). The current element is specified through the [XPath](#XPath) configuration setting. This configuration setting is read-only. **XChildName[i]**: The name of the child element.This configuration setting provides the name of the i-th child element of the current element. The current element is specified through the [XPath](#XPath) configuration setting. This configuration setting is read-only. **XChildXText[i]**: The inner text of the child element.This configuration setting provides the inner text of the i-th child element of the current element. The current element is specified through the [XPath](#XPath) configuration setting. This configuration setting is read-only. **XElement**: The name of the current element.This configuration setting provides the name of the current element. The current element is specified through the [XPath](#XPath) configuration setting. This configuration setting is read-only. **XParent**: The parent of the current element.This configuration setting provides the parent of the current element. The current element is specified through the [XPath](#XPath) configuration setting. This configuration setting is read-only. **XPath**: Provides a way to point to a specific element in the returned XML or JSON response.The [XPath](#XPath) setting allows you to point to specific elements in the XML or JSON response. When [XPath](#XPath) is set to a valid path, [XElement](#XElement) points to the name of the element, with [XText](#XText), [XParent](#XParent), [XSubTree](#XSubTree), [XChildCount](#XChildCount), [XChildName\[i\]](#XChildName[i]), and [XChildXText\[i\]](#XChildXText[i]) providing other properties of the element. XPath syntax is available for both XML and JSON documents. An XPath is a series of one or more element accessors separated by the */* character, for example, */A/B/C/D*. An XPath can be absolute (i.e., it starts with */*), or it can be relative to the current [XPath](#XPath) location. The following are possible values for an element accessor, which operates relative to the current location specified by the XPath accessors, which proceed it in the overall XPath string: | Accessor | Description | | --- | --- | | name | The first element with a particular name. Can be *. | | [i] | The i-th element. | | name[i] | The i-th element with a particular name. | | [last()] | The last element. | | [last()-i] | The element i before the last element. | | name[@attrname="attrvalue"] | The first element with a particular name that contains the specified attribute-value pair. Supports single and double quotes. (XML Only) | | . | The current element. | | .. | The parent element. | NOTE: XPath indices are *1-based*. For example, assume the following XML and JSON responses. XML: ```text value first second value three ``` JSON: ```text { "firstlevel": { "one": "value", "two": ["first", "second"], "three": "value three" } } ``` The following are examples of valid XPaths for these responses: | Description | XML XPath | JSON XPath | | --- | --- | --- | | Document root | / | /json | | Specific element | /firstlevel/one | /json/firstlevel/one | | i-th child | /firstlevel/two/item[2] | /json/firstlevel/two/[2] | This list is not exhaustive, but it provides a general idea of the possibilities. **XSubTree**: A snapshot of the current element in the document.This configuration setting provides the entirety of the current element (including its subelements). The current element is specified through the [XPath](#XPath) configuration setting. This configuration setting is read-only. **XText**: The text of the current element.This configuration setting provides the inner text of the current element. The current element is specified in the [XPath](#XPath) configuration setting. This configuration setting is read-only. ### HTTP Config Settings **AcceptEncoding**: Used to tell the server which types of content encodings the client supports.When [AllowHTTPCompression](#AllowHTTPCompression) is True, the component adds an *Accept-Encoding* header to the request being sent to the server. By default, this header's value is "gzip, deflate". This configuration setting allows you to change the value of the *Accept-Encoding* header. NOTE: The component only supports gzip and deflate decompression algorithms. **AllowHTTPCompression**: This property enables HTTP compression for receiving data.This configuration setting enables HTTP compression for receiving data. When set to True (default), the component will accept compressed data. It then will uncompress the data it has received. The component will handle data compressed by both gzip and deflate compression algorithms. When True, the component adds an *Accept-Encoding* header to the outgoing request. The value for this header can be controlled by the [AcceptEncoding](#AcceptEncoding) configuration setting. The default value for this header is "gzip, deflate". The default value is True. **AllowHTTPFallback**: Whether HTTP/2 connections are permitted to fallback to HTTP/1.1.This configuration setting controls whether HTTP/2 connections are permitted to fall back to HTTP/1.1 when the server does not support HTTP/2. This setting is applicable only when HTTPVersion is set to "2.0". If set to True (default), the component will automatically use HTTP/1.1 if the server does not support HTTP/2. If set to False, the component throws an exception if the server does not support HTTP/2. The default value is True. **AllowNTLMFallback**: Whether to allow fallback from Negotiate to NTLM when authenticating.This configuration setting applies only when AuthScheme is set to Negotiate. If set to True, the component will automatically use New Technology LAN Manager (NTLM) if the server does not support Negotiate authentication. NOTE: The server must indicate that it supports NTLM authentication through the WWW-Authenticate header for the fallback from Negotiate to NTLM to take place. The default value is False. **Append**: Whether to append data to LocalFile.This configuration setting determines whether data will be appended when writing to [LocalFile](#localfile-property-backblazeb2-component). When set to True, downloaded data will be appended to [LocalFile](#localfile-property-backblazeb2-component). This may be used in conjunction with [Range](#range-property-backblazeb2-component) to resume a failed download. This is applicable only when [LocalFile](#localfile-property-backblazeb2-component) is set. The default value is False. **Authorization**: The Authorization string to be sent to the server.If the [Authorization](#Authorization) property contains a nonempty string, an *Authorization* HTTP request header is added to the request. This header conveys Authorization information to the server. This property is provided so that the HTTP component can be extended with other security schemes in addition to the authorization schemes already implemented by the component. The AuthScheme property defines the authentication scheme used. In the case of HTTP Basic Authentication (default), every time User and Password are set, they are Base64 encoded, and the result is put in the Authorization property in the form "Basic [encoded-user-password]". **BytesTransferred**: Contains the number of bytes transferred in the response data.This configuration setting returns the raw number of bytes from the HTTP response data, before the component processes the data, whether it is chunked or compressed. This returns the same value as the [Transfer](#transfer-event-backblazeb2-component) event, by [BytesTransferred](#BytesTransferred). **ChunkSize**: Specifies the chunk size in bytes when using chunked encoding.This is applicable only when [UseChunkedEncoding](#UseChunkedEncoding) is True. This setting specifies the chunk size in bytes to be used when posting data. The default value is 16384. **CompressHTTPRequest**: Set to true to compress the body of a PUT or POST request.If set to True, the body of a *PUT* or *POST* request will be compressed into gzip format before sending the request. The "Content-Encoding" header is also added to the outgoing request. The default value is False. **EncodeURL**: If set to True the URL will be encoded by the component.If set to True, the URL passed to the component will be URL encoded. The default value is False. **FollowRedirects**: Determines what happens when the server issues a redirect.This option determines what happens when the server issues a redirect. Normally, the component returns an error if the server responds with an "Object Moved" message. If this property is set to 1 (always), the new URL for the object is retrieved automatically every time. If this property is set to 2 (Same Scheme), the new URL is retrieved automatically only if the URL Scheme is the same; otherwise, the component throws an exception. **Note:** Following the HTTP specification, unless this option is set to 1 (Always), automatic redirects will be performed only for *GET* or *HEAD* requests. Other methods potentially could change the conditions of the initial request and create security vulnerabilities. Furthermore, if either the new URL server or port are different from the existing one, User and Password are also reset to empty, unless this property is set to 1 (Always), in which case the same credentials are used to connect to the new server. A Redirect event is fired for every URL the product is redirected to. In the case of automatic redirections, the Redirect event is a good place to set properties related to the new connection (e.g., new authentication parameters). The default value is 0 (Never). In this case, redirects are never followed, and the component throws an exception instead. Following are the valid options: - 0 - Never - 1 - Always - 2 - Same Scheme **GetOn302Redirect**: If set to True the component will perform a GET on the new location.The default value is False. If set to True, the component will perform a *GET* on the new location. Otherwise, it will use the same HTTP method again. **HTTP2HeadersWithoutIndexing**: HTTP2 headers that should not update the dynamic header table with incremental indexing.HTTP/2 servers maintain a dynamic table of headers and values seen over the course of a connection. Typically, these headers are inserted into the table through incremental indexing (also known as HPACK, defined in RFC 7541). To tell the component not to use incremental indexing for certain headers, and thus not update the dynamic table, set this configuration option to a comma-delimited list of the header names. **HTTPVersion**: The version of HTTP used by the component.This property specifies the HTTP version used by the component. Possible values are as follows: - "1.0" - "1.1" (default) - "2.0" - "3.0" When using HTTP/2 ("2.0") or HTTP/3 ("3.0"), additional restrictions apply. Please see the following notes for details. **HTTP/2 Notes** When using HTTP/2, a secure Secure Sockets Layer/Transport Layer Security (TLS/SSL) connection is required. Attempting to use a plaintext URL with HTTP/2 will result in an error. If the server does not support HTTP/2, the component will automatically use HTTP/1.1 instead. This is done to provide compatibility without the need for any additional settings. To see which version was used, check [NegotiatedHTTPVersion](#NegotiatedHTTPVersion) after calling a method. The [AllowHTTPFallback](#AllowHTTPFallback) setting controls whether this behavior is allowed (default) or disallowed. HTTP/2 is supported on all versions of Windows. If the Windows version is an earlier version than Windows 8.1/Windows Server 2012 R2, the internal security implementation will be used. If the Windows version is Window 8.1/Windows Server 2012 R2 or later, the system security libraries will be used by default. **HTTP/3 Notes** HTTP/3 is supported only in .NET and Java. When using HTTP/3, a secure (TLS/SSL) connection is required. Attempting to use a plaintext URL with HTTP/3 will result in an error. **IfModifiedSince**: A date determining the maximum age of the desired document.If this setting contains a nonempty string, an If-Modified-Since HTTP header is added to the request. The value of this header is used to make the HTTP request conditional: if the requested documented has not been modified since the time specified in the field, a copy of the document will not be returned from the server; instead, a 304 (not modified) response will be returned by the server and the component throws an exception The format of the date value for IfModifiedSince is detailed in the HTTP specs. For example: ```text Sat, 29 Oct 2017 19:43:31 GMT. ``` **KeepAlive**: Determines whether the HTTP connection is closed after completion of the request.If *true*, the component will not send the *Connection: Close* header. The absence of the Connection header indicates to the server that HTTP persistent connections should be used if supported. NOTE: Not all servers support persistent connections. If *false*, the connection will be closed immediately after the server response is received. The default value for [KeepAlive](#KeepAlive) is *false*. **KerberosSPN**: The Service Principal Name for the Kerberos Domain Controller.If the Service Principal Name on the Kerberos Domain Controller is not the same as the URL that you are authenticating to, the Service Principal Name should be set here. **LogLevel**: The level of detail that is logged.This configuration setting controls the level of detail that is logged through the [Log](#log-event-backblazeb2-component) event. Possible values are as follows: | | | | --- | --- | | 0 (None) | No events are logged. | | 1 (Info - default) | Informational events are logged. | | 2 (Verbose) | Detailed data are logged. | | 3 (Debug) | Debug data are logged. | The value 1 (Info) logs basic information, including the URL, HTTP version, and status details. The value 2 (Verbose) logs additional information about the request and response. The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any). **MaxHeaders**: Instructs component to save the amount of headers specified that are returned by the server after a Header event has been fired.This configuration setting should be set when the TransferredHeaders collection is to be populated when a [Header](#header-event-backblazeb2-component) event has been fired. This value represents the number of headers that are to be saved in the collection. To save all items to the collection, set this configuration setting to -1. If no items are wanted, set this to 0, which will not save any items to the collection. The default for this configuration setting is -1, so all items will be included in the collection. **MaxHTTPCookies**: Instructs component to save the amount of cookies specified that are returned by the server when a SetCookie event is fired.This configuration setting should be set when populating the Cookies collection as a result of an HTTP request. This value represents the number of cookies that are to be saved in the collection. To save all items to the collection, set this configuration setting to -1. If no items are wanted, set this to 0, which will not save any items to the collection. The default for this configuration setting is -1, so all items will be included in the collection. **MaxRedirectAttempts**: Limits the number of redirects that are followed in a request.When FollowRedirects is set to any value other than frNever, the component will follow redirects until this maximum number of redirect attempts are made. The default value is 20. **NegotiatedHTTPVersion**: The negotiated HTTP version.This configuration setting may be queried after the request is complete to indicate the HTTP version used. When HTTPVersion is set to "2.0" (if the server does not support "2.0"), then the component will fall back to using "1.1" automatically. This setting will indicate which version was used. **OtherHeaders**: Other headers as determined by the user (optional).This configuration setting can be set to a string of headers to be appended to the HTTP request headers. The headers must follow the format "header: value" as described in the HTTP specifications. Header lines should be separated by CRLF (*"\r\n"*) . Use this configuration setting with caution. If this configuration setting contains invalid headers, HTTP requests may fail. This configuration setting is useful for extending the functionality of the component beyond what is provided. **ProxyAuthorization**: The authorization string to be sent to the proxy server.This is similar to the [Authorization](#Authorization) configuration setting, but is used for proxy authorization. If this configuration setting contains a nonempty string, a *Proxy-Authorization* HTTP request header is added to the request. This header conveys proxy Authorization information to the server. If [User](#Proxy_f_User) and [Password](#Proxy_f_Password) are specified, this value is calculated using the algorithm specified by [AuthScheme](#Proxy_f_AuthScheme). **ProxyAuthScheme**: The authorization scheme to be used for the proxy.This configuration setting is provided for use by components that do not directly expose Proxy properties. **ProxyPassword**: A password if authentication is to be used for the proxy.This configuration setting is provided for use by components that do not directly expose Proxy properties. **ProxyPort**: Port for the proxy server (default 80).This configuration setting is provided for use by components that do not directly expose Proxy properties. **ProxyServer**: Name or IP address of a proxy server (optional).This configuration setting is provided for use by components that do not directly expose Proxy properties. **ProxyUser**: A user name if authentication is to be used for the proxy.This configuration setting is provided for use by components that do not directly expose Proxy properties. **SentHeaders**: The full set of headers as sent by the client.This configuration setting returns the complete set of raw headers as sent by the client. **StatusCode**: The status code of the last response from the server.This configuration setting contains the result code of the last response from the server. **StatusLine**: The first line of the last response from the server.This setting contains the first line of the last response from the server. The format of the line will be *[HTTP version] [Result Code] [Description]*. **TransferredData**: The contents of the last response from the server.This configuration setting contains the contents of the last response from the server. **TransferredDataLimit**: The maximum number of incoming bytes to be stored by the component.If [TransferredDataLimit](#TransferredDataLimit) is set to 0 (default), no limits are imposed. Otherwise, this reflects the maximum number of incoming bytes that can be stored by the component. **TransferredHeaders**: The full set of headers as received from the server.This configuration setting returns the complete set of raw headers as received from the server. **TransferredRequest**: The full request as sent by the client.This configuration setting returns the full request as sent by the client. For performance reasons, the request is not normally saved. Set this configuration setting to ON before making a request to enable it. Following are examples of this request: .NET ```text Http http = new Http(); http.Config("TransferredRequest=on"); http.PostData = "body"; http.Post("http://someserver.com"); Console.WriteLine(http.Config("TransferredRequest")); ``` C++ ```text HTTP http; http.Config("TransferredRequest=on"); http.SetPostData("body", 5); http.Post("http://someserver.com"); printf("%s\r\n", http.Config("TransferredRequest")); ``` **UseChunkedEncoding**: Enables or Disables HTTP chunked encoding for transfers.If [UseChunkedEncoding](#UseChunkedEncoding) is set to True, the component will use HTTP-chunked encoding when posting, if possible. HTTP-chunked encoding allows large files to be sent in chunks instead of all at once. If set to False, the component will not use HTTP-chunked encoding. The default value is False. NOTE: Some servers (such as the ASP.NET Development Server) may not support chunked encoding. **UseIDNs**: Whether to encode hostnames to internationalized domain names.This configuration setting specifies whether hostnames containing non-ASCII characters are encoded to internationalized domain names. When set to True, if a hostname contains non-ASCII characters, it is encoded using Punycode to an IDN (internationalized domain name). The default value is False and the hostname will always be used exactly as specified. **UsePlatformDeflate**: Whether to use the platform implementation to decompress compressed responses.This configuration setting specifies whether the platform's deflate-algorithm implementation is used to decompress responses that use compression. If set to *True* (default), the platform implementation is used. If set to *False*, an internal implementation is used. **UsePlatformHTTPClient**: Whether or not to use the platform HTTP client.When using this configuration setting, if True, the component will use the default HTTP client for the platform (*URLConnection* in Java, *WebRequest* in .NET, or CFHTTPMessage in Mac/iOS) instead of the internal HTTP implementation. This is important for environments in which direct access to sockets is limited or not allowed (e.g., in the Google AppEngine). **UseProxyAutoConfigURL**: Whether to use a Proxy auto-config file when attempting a connection.This configuration specifies whether the component will attempt to use the Proxy auto-config URL when establishing a connection and [AutoDetect](#Proxy_f_AutoDetect) is set to *True*. When *True* (default), the component will check for the existence of a Proxy auto-config URL, and if found, will determine the appropriate proxy to use. **UserAgent**: Information about the user agent (browser).This is the value supplied in the HTTP User-Agent header. The default setting is "IPWorks HTTP Component - www.nsoftware.com". Override the default with the name and version of your software. ### TCPClient Config Settings **CloseStreamAfterTransfer**: If true, the component will close the upload or download stream after the transfer.This configuration setting determines whether the input or output stream is closed after the transfer completes. When set to True (default), all streams will be closed after a transfer is completed. To keep streams open after the transfer of data, set this to False. The default value is True. **ConnectionTimeout**: Sets a separate timeout value for establishing a connection.When set, this configuration setting allows you to specify a different timeout value for establishing a connection. Otherwise, the component will use [Timeout](#timeout-property-backblazeb2-component) for establishing a connection and transmitting/receiving data. **FirewallAutoDetect**: Tells the component whether or not to automatically detect and use firewall system settings, if available.This configuration setting is provided for use by components that do not directly expose Firewall properties. **FirewallHost**: Name or IP address of firewall (optional).If a [FirewallHost](#FirewallHost) is given, requested connections will be authenticated through the specified firewall when connecting. If the [FirewallHost](#FirewallHost) setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the [FirewallHost](#FirewallHost) setting is set to the corresponding address. If the search is not successful, an error is returned. NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **FirewallHTTPVersion**: The HTTP version to be used when connecting through a tunneling proxy.When [FirewallType](#FirewallType) is set to a tunneling proxy, this setting dictates which HTTP version is used when connecting. **FirewallListener**: If true, the component binds to a SOCKS firewall as a server (TCPClient only).This entry is for TCPClient only and does not work for other components that descend from TCPClient. If this entry is set, the component acts as a server. RemoteHost and RemotePort are used to tell the SOCKS firewall in which address and port to listen to. The firewall rules may ignore RemoteHost, and it is recommended that RemoteHost be set to empty string in this case. RemotePort is the port in which the firewall will listen to. If set to 0, the firewall will select a random port. The binding (address and port) is provided through the ConnectionStatus event. The connection to the firewall is made by calling the Connect method. **FirewallPassword**: Password to be used if authentication is to be used when connecting through the firewall.If [FirewallHost](#FirewallHost) is specified, the [FirewallUser](#FirewallUser) and [FirewallPassword](#FirewallPassword) settings are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception. NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **FirewallPort**: The TCP port for the FirewallHost;.The [FirewallPort](#FirewallPort) is set automatically when [FirewallType](#FirewallType) is set to a valid value. NOTE: This configuration setting is provided for use by components that do not directly expose Firewall properties. **FirewallType**: Determines the type of firewall to connect through.Possible values are as follows: | | | | --- | --- | | 0 | No firewall (default setting). | | 1 | Connect through a tunneling proxy. [FirewallPort](#FirewallPort) is set to 80. | | 2 | Connect through a SOCKS4 Proxy. [FirewallPort](#FirewallPort) is set to 1080. | | 3 | Connect through a SOCKS5 Proxy. [FirewallPort](#FirewallPort) is set to 1080. | | 10 | Connect through a SOCKS4A Proxy. [FirewallPort](#FirewallPort) is set to 1080. | NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **FirewallUser**: A user name if authentication is to be used connecting through a firewall.If the [FirewallHost](#FirewallHost) is specified, the [FirewallUser](#FirewallUser) and [FirewallPassword](#FirewallPassword) settings are used to connect and authenticate to the Firewall. If the authentication fails, the component throws an exception. NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **KeepAliveInterval**: The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.When set, [TCPKeepAlive](#TCPKeepAlive) will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by [KeepAliveTime](#KeepAliveTime). If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This configuration setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. This system default if this value is not specified here is 1 second. NOTE: This value is not applicable in macOS. **KeepAliveTime**: The inactivity time in milliseconds before a TCP keep-alive packet is sent.When set, [TCPKeepAlive](#TCPKeepAlive) will automatically be set to True. By default, the operating system will determine the time a connection is idle before a Transmission Control Protocol (TCP) keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds. **Linger**: When set to True, connections are terminated gracefully.This property controls how a connection is closed. The default is True. In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if [LingerTime](#LingerTime) is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires. In the second scenario, if [LingerTime](#LingerTime) is a positive value, the system will attempt to send pending data until the specified [LingerTime](#LingerTime) is reached. If this attempt fails, then the system will reset the connection. The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the component returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes). Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action. **LingerTime**: Time in seconds to have the connection linger. LingerTime is the time, in seconds, the socket connection will linger. This value is 0 by default, which means it will use the default IP timeout. **LocalHost**: The name of the local host through which connections are initiated or accepted. The [LocalHost](#localhost-property-backblazeb2-component) setting contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address. In multihomed hosts (machines with more than one IP interface), setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. If the component is connected, the [LocalHost](#localhost-property-backblazeb2-component) setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface). **LocalPort**: The port in the local host where the component binds. This configuration setting must be set before a connection is attempted. It instructs the component to bind to a specific port (or communication endpoint) in the local machine. Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established. LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error. This configuration setting is useful when trying to connect to services that require a trusted port on the client side. An example is the remote shell (rsh) service in UNIX systems. **MaxLineLength**: The maximum amount of data to accumulate when no EOL is found.[MaxLineLength](#MaxLineLength) is the size of an internal buffer, which holds received data while waiting for an EOL string. If an EOL string is found in the input stream before [MaxLineLength](#MaxLineLength) bytes are received, the DataIn event is fired with the *EOL* parameter set to True, and the buffer is reset. If no EOL is found, and [MaxLineLength](#MaxLineLength) bytes are accumulated in the buffer, the DataIn event is fired with the *EOL* parameter set to False, and the buffer is reset. The minimum value for [MaxLineLength](#MaxLineLength) is 256 bytes. The default value is 2048 bytes. **MaxTransferRate**: The transfer rate limit in bytes per second.This configuration setting can be used to throttle outbound TCP traffic. Set this to the number of bytes to be sent per second. By default, this is not set and there is no limit. **ProxyExceptionsList**: A semicolon separated list of hosts and IPs to bypass when using a proxy.This configuration setting optionally specifies a semicolon-separated list of hostnames or IP addresses to bypass when a proxy is in use. When requests are made to hosts specified in this property, the proxy will not be used. For instance: *www.google.com;www.example.com* **TCPKeepAlive**: Determines whether or not the keep alive socket option is enabled.If set to True, the socket's keep-alive option is enabled and keep-alive packets will be sent periodically to maintain the connection. Set [KeepAliveTime](#KeepAliveTime) and [KeepAliveInterval](#KeepAliveInterval) to configure the timing of the keep-alive packets. NOTE: This value is not applicable in Java. **TcpNoDelay**: Whether or not to delay when sending packets. When set to True, the socket will send all data that are ready to send at once. When set to False, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm. By default, this configuration setting is set to False. **UseIPv6**: Whether to use IPv6.When set to *0* (default), the component will use IPv4 exclusively. When set to *1*, the component will use IPv6 exclusively. To instruct the component to prefer IPv6 addresses, but use IPv4 if IPv6 is not supported on the system, this setting should be set to *2*. The default value is *0*. Possible values are as follows: | | | | --- | --- | | 0 | IPv4 only | | 1 | IPv6 only | | 2 | IPv6 with IPv4 fallback | **UseNTLMv2**: Whether to use NTLM V2.When authenticating with NTLM, this setting specifies whether NTLM V2 is used. By default this value is True and NTLM V2 will be used. Set this to False to use NTLM V1. ### SSL Config Settings **CACertFilePaths**: The paths to CA certificate files when using Mono on Unix/Linux.This configuration setting specifies the paths on disk to certificate authority (CA) certificate files when using Mono on Unix/Linux. It is not applicable in any other circumstances. The value is formatted as a list of paths separated by semicolons. The component will check for the existence of each file in the order specified. When a file is found, the CA certificates within the file will be loaded and used to determine the validity of server or client certificates. The default value is as follows: */etc/ssl/ca-bundle.pem;/etc/pki/tls/certs/ca-bundle.crt;/etc/ssl/certs/ca-certificates.crt;/etc/pki/tls/cacert.pem* **LogSSLPackets**: Controls whether SSL packets are logged when using the internal security API.When [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal*, this configuration setting controls whether Secure Sockets Layer (SSL) packets should be logged. By default, this configuration setting is *False*, as it is useful only for debugging purposes. When enabled, SSL packet logs are output using the [SSLStatus](#sslstatus-event-backblazeb2-component) event, which will fire each time an SSL packet is sent or received. Enabling this configuration setting has no effect if [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Platform*. **ReuseSSLSession**: Determines if the SSL session is reused. If set to True, the component will reuse the context if and only if the following criteria are met: - The target host name is the same. - The system cache entry has not expired (default timeout is 10 hours). - The application process that calls the function is the same. - The logon session is the same. - The instance of the component is the same. **SSLCACerts**: A newline separated list of CA certificates to be included when performing an SSL handshake.When [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal*, this configuration setting specifies one or more CA certificates to be included with the [SSLCert](#sslcert-property-backblazeb2-component) property. Some servers or clients require the entire chain, including CA certificates, to be presented when performing SSL authentication. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **SSLCheckCRL**: Whether to check the Certificate Revocation List for the server certificate.This configuration setting specifies whether the component will check the Certificate Revocation List (CRL) specified by the server certificate. If set to 1 or 2, the component will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The component will then make HTTP requests to each CRL endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the component throws an exception. When set to 0 (default), the CRL check will not be performed by the component. When set to 1, it will attempt to perform the CRL check, but it will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported. This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems. **SSLCheckOCSP**: Whether to use OCSP to check the status of the server certificate.This configuration setting specifies whether the component will use OCSP to check the validity of the server certificate. If set to 1 or 2, the component will first obtain the Online Certificate Status Protocol (OCSP) URL from the server certificate's OCSP extension. The component will then locate the issuing certificate and make an HTTP request to the OCSP endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation, the component throws an exception. When set to 0 (default), the component will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but it will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported. This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems. **SSLCipherStrength**: The minimum cipher strength used for bulk encryption. This minimum cipher strength is largely dependent on the security modules installed on the system. If the cipher strength specified is not supported, an error will be returned when connections are initiated. NOTE: This configuration setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the [SSLStatus](#sslstatus-event-backblazeb2-component) event. Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application. When the provider is OpenSSL, [SSLCipherStrength](#SSLCipherStrength) is currently not supported. This functionality is instead made available through the [OpenSSLCipherList](#OpenSSLCipherList) configuration setting. **SSLClientCACerts**: A newline separated list of CA certificates to use during SSL client certificate validation.This configuration setting is only applicable to server components (e.g., TCPServer) see [SSLServerCACerts](#SSLServerCACerts) for client components (e.g., TCPClient). This setting can be used to optionally specify one or more CA certificates to be used when verifying the client certificate that is presented by the client during the SSL handshake when SSLAuthenticateClients is enabled. When verifying the client's certificate, the certificates trusted by the system will be used as part of the verification process. If the client's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the client's CA certificates are not already trusted on the system and cannot be installed to the trusted system store. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **SSLEnabledCipherSuites**: The cipher suite to be used in an SSL negotiation.This configuration setting enables the cipher suites to be used in SSL negotiation. By default, the enabled cipher suites will include all available ciphers ("*"). The special value "*" means that the component will pick all of the supported cipher suites. If [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is set to any other value, only the specified cipher suites will be considered. Multiple cipher suites are separated by semicolons. Example values when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Platform* include the following: ```text obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=CALG_AES_256"); obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES"); ``` Possible values when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Platform* include the following: - CALG_3DES - CALG_3DES_112 - CALG_AES - CALG_AES_128 - CALG_AES_192 - CALG_AES_256 - CALG_AGREEDKEY_ANY - CALG_CYLINK_MEK - CALG_DES - CALG_DESX - CALG_DH_EPHEM - CALG_DH_SF - CALG_DSS_SIGN - CALG_ECDH - CALG_ECDH_EPHEM - CALG_ECDSA - CALG_ECMQV - CALG_HASH_REPLACE_OWF - CALG_HUGHES_MD5 - CALG_HMAC - CALG_KEA_KEYX - CALG_MAC - CALG_MD2 - CALG_MD4 - CALG_MD5 - CALG_NO_SIGN - CALG_OID_INFO_CNG_ONLY - CALG_OID_INFO_PARAMETERS - CALG_PCT1_MASTER - CALG_RC2 - CALG_RC4 - CALG_RC5 - CALG_RSA_KEYX - CALG_RSA_SIGN - CALG_SCHANNEL_ENC_KEY - CALG_SCHANNEL_MAC_KEY - CALG_SCHANNEL_MASTER_HASH - CALG_SEAL - CALG_SHA - CALG_SHA1 - CALG_SHA_256 - CALG_SHA_384 - CALG_SHA_512 - CALG_SKIPJACK - CALG_SSL2_MASTER - CALG_SSL3_MASTER - CALG_SSL3_SHAMD5 - CALG_TEK - CALG_TLS1_MASTER - CALG_TLS1PRF Example values when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal*include the following: ```text obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA"); ``` Possible values when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal* include the following: - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 - TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 - TLS_RSA_WITH_AES_256_GCM_SHA384 - TLS_RSA_WITH_AES_128_GCM_SHA256 - TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 - TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 - TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 - TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 - TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 - TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 - TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 - TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 - TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 - TLS_RSA_WITH_AES_256_CBC_SHA256 - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 - TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 - TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 - TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 - TLS_RSA_WITH_AES_128_CBC_SHA256 - TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 - TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 - TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 - TLS_RSA_WITH_AES_256_CBC_SHA - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA - TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA - TLS_DHE_RSA_WITH_AES_256_CBC_SHA - TLS_ECDH_RSA_WITH_AES_256_CBC_SHA - TLS_DHE_DSS_WITH_AES_256_CBC_SHA - TLS_RSA_WITH_AES_128_CBC_SHA - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA - TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA - TLS_ECDH_RSA_WITH_AES_128_CBC_SHA - TLS_DHE_RSA_WITH_AES_128_CBC_SHA - TLS_DHE_DSS_WITH_AES_128_CBC_SHA - TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA - TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA - TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA - TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA - TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA - TLS_RSA_WITH_3DES_EDE_CBC_SHA - TLS_RSA_WITH_DES_CBC_SHA - TLS_DHE_RSA_WITH_DES_CBC_SHA - TLS_DHE_DSS_WITH_DES_CBC_SHA - TLS_RSA_WITH_RC4_128_MD5 - TLS_RSA_WITH_RC4_128_SHA When TLS 1.3 is negotiated (see [SSLEnabledProtocols](#SSLEnabledProtocols)), only the following cipher suites are supported: - TLS_AES_256_GCM_SHA384 - TLS_CHACHA20_POLY1305_SHA256 - TLS_AES_128_GCM_SHA256 [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is used together with [SSLCipherStrength](#SSLCipherStrength). **SSLEnabledProtocols**: Used to enable/disable the supported security protocols.This configuration setting is used to enable or disable the supported security protocols. Not all supported protocols are enabled by default. The default value is *4032* for client components, and *3072* for server components. To specify a combination of enabled protocol versions set this config to the binary *OR* of one or more of the following values: | | | | --- | --- | | TLS1.3 | 12288 (Hex 3000) | | TLS1.2 | 3072 (Hex C00) (Default - Client and Server) | | TLS1.1 | 768 (Hex 300) (Default - Client) | | TLS1 | 192 (Hex C0) (Default - Client) | | SSL3 | 48 (Hex 30) | | SSL2 | 12 (Hex 0C) | Note that only TLS 1.2 is enabled for server components that accept incoming connections. This adheres to industry standards to ensure a secure connection. Client components enable TLS 1.0, TLS 1.1, and TLS 1.2 by default and will negotiate the highest mutually supported version when connecting to a server, which should be TLS 1.2 in most cases. **SSLEnabledProtocols: Transport Layer Security (TLS) 1.3 Notes:** By default when TLS 1.3 is enabled, the component will first try to use the platform TLS 1.3 implementation when the [SSLProvider](#sslprovider-property-backblazeb2-component) is set to Automatic for all editions. If the platform TLS 1.3 implementation is not available, the internal implementation will be used. In editions that are designed to run on Windows, [SSLProvider](#sslprovider-property-backblazeb2-component) can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is supported only on Windows 11/Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version. If set to *1* (Platform provider), please be aware of the following notes: - The platform provider is available only on Windows 11/Windows Server 2022 and up. - [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) and other similar SSL configuration settings are not supported. - If [SSLEnabledProtocols](#SSLEnabledProtocols) includes both TLS 1.3 and TLS 1.2, these restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions. **SSLEnabledProtocols: SSL2 and SSL3 Notes: ** SSL 2.0 and 3.0 are not supported by the component when the [SSLProvider](#sslprovider-property-backblazeb2-component) is set to internal. To use SSL 2.0 or SSL 3.0, the platform security API must have the protocols enabled and [SSLProvider](#sslprovider-property-backblazeb2-component) needs to be set to platform. **SSLEnableRenegotiation**: Whether the renegotiation_info SSL extension is supported.This configuration setting specifies whether the renegotiation_info SSL extension will be used in the request when using the internal security API. This configuration setting is *false* by default, but it can be set to *true* to enable the extension. This configuration setting is applicable only when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal*. **SSLIncludeCertChain**: Whether the entire certificate chain is included in the SSLServerAuthentication event.This configuration setting specifies whether the Encoded parameter of the [SSLServerAuthentication](#sslserverauthentication-event-backblazeb2-component) event contains the full certificate chain. By default this value is False and only the leaf certificate will be present in the Encoded parameter of the [SSLServerAuthentication](#sslserverauthentication-event-backblazeb2-component) event. If set to True, all certificates returned by the server will be present in the Encoded parameter of the [SSLServerAuthentication](#sslserverauthentication-event-backblazeb2-component) event. This includes the leaf certificate, any intermediate certificate, and the root certificate. Note: When [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal* this value is automatically set to *true*. This is needed for proper validation when using the internal provider. **SSLKeyLogFile**: The location of a file where per-session secrets are written for debugging purposes.This configuration setting optionally specifies the full path to a file on disk where per-session secrets are stored for debugging purposes. When set, the component will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools, such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffic for debugging purposes. When writing to this file, the component will only append, it will not overwrite previous values. NOTE: This configuration setting is applicable only when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal*. **SSLNegotiatedCipher**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipher[connId]"); ``` **SSLNegotiatedCipherStrength**: Returns the negotiated cipher suite strength.This configuration setting returns the strength of the cipher suite negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipherStrength[connId]"); ``` **SSLNegotiatedCipherSuite**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake represented as a single string. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipherSuite[connId]"); ``` **SSLNegotiatedKeyExchange**: Returns the negotiated key exchange algorithm.This configuration setting returns the key exchange algorithm negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedKeyExchange[connId]"); ``` **SSLNegotiatedKeyExchangeStrength**: Returns the negotiated key exchange algorithm strength.This configuration setting returns the strength of the key exchange algorithm negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedKeyExchangeStrength[connId]"); ``` **SSLNegotiatedVersion**: Returns the negotiated protocol version.This configuration setting returns the protocol version negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedVersion[connId]"); ``` **SSLSecurityFlags**: Flags that control certificate verification.The following flags are defined (specified in hexadecimal notation). They can be ORed together to exclude multiple conditions: | | | | --- | --- | | 0x00000001 | Ignore time validity status of certificate. | | 0x00000002 | Ignore time validity status of CTL. | | 0x00000004 | Ignore non-nested certificate times. | | 0x00000010 | Allow unknown certificate authority. | | 0x00000020 | Ignore wrong certificate usage. | | 0x00000100 | Ignore unknown certificate revocation status. | | 0x00000200 | Ignore unknown CTL signer revocation status. | | 0x00000400 | Ignore unknown certificate authority revocation status. | | 0x00000800 | Ignore unknown root revocation status. | | 0x00008000 | Allow test root certificate. | | 0x00004000 | Trust test root certificate. | | 0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). | This functionality is currently not available in Java or when the provider is OpenSSL. **SSLServerCACerts**: A newline separated list of CA certificates to use during SSL server certificate validation.This configuration setting is only used by client components (e.g., TCPClient) see [SSLClientCACerts](#SSLClientCACerts) for server components (e.g., TCPServer). This configuration setting can be used to optionally specify one or more CA certificates to be used when connecting to the server and verifying the server certificate. When verifying the server's certificate, the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **TLS12SignatureAlgorithms**: Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.This configuration setting specifies the allowed server certificate signature algorithms when [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal* and [SSLEnabledProtocols](#SSLEnabledProtocols) is set to allow TLS 1.2. When specified the component will verify that the server certificate signature algorithm is among the values specified in this configuration setting. If the server certificate signature algorithm is unsupported, the component throws an exception. The format of this value is a comma-separated list of hash-signature combinations. For instance: ```csharp component.SSLProvider = TCPClientSSLProviders.sslpInternal; component.Config("SSLEnabledProtocols=3072"); //TLS 1.2 component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa"); ``` The default value for this configuration setting is *sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa*. To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent. **TLS12SupportedGroups**: The supported groups for ECC.This configuration setting specifies a comma-separated list of named groups used in TLS 1.2 for ECC. The default value is *ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1*. When using TLS 1.2 and [SSLProvider](#sslprovider-property-backblazeb2-component) is set to *Internal*, the values refer to the supported groups for ECC. The following values are supported: - "ecdhe_secp256r1" (default) - "ecdhe_secp384r1" (default) - "ecdhe_secp521r1" (default) **TLS13KeyShareGroups**: The groups for which to pregenerate key shares.This configuration setting specifies a comma-separated list of named groups used in TLS 1.3 for key exchange. The groups specified here will have key share data pregenerated locally before establishing a connection. This can prevent an additional roundtrip during the handshake if the group is supported by the server. The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result, only some groups are included by default in this configuration setting. NOTE: All supported groups can always be used during the handshake even if not listed here, but if a group is used that is not present in this list, it will incur an additional roundtrip and time to generate the key share for that group. In most cases, this configuration setting does not need to be modified. This should be modified only if there is a specific reason to do so. The default value is *ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072* The values are ordered from most preferred to least preferred. The following values are supported: - "ecdhe_x25519" (default) - "ecdhe_x448" - "ecdhe_secp256r1" (default) - "ecdhe_secp384r1" (default) - "ecdhe_secp521r1" - "ffdhe_2048" (default) - "ffdhe_3072" (default) - "ffdhe_4096" - "ffdhe_6144" - "ffdhe_8192" **TLS13SignatureAlgorithms**: The allowed certificate signature algorithms.This configuration setting holds a comma-separated list of allowed signature algorithms. Possible values include the following: - "ed25519" (default) - "ed448" (default) - "ecdsa_secp256r1_sha256" (default) - "ecdsa_secp384r1_sha384" (default) - "ecdsa_secp521r1_sha512" (default) - "rsa_pkcs1_sha256" (default) - "rsa_pkcs1_sha384" (default) - "rsa_pkcs1_sha512" (default) - "rsa_pss_sha256" (default) - "rsa_pss_sha384" (default) - "rsa_pss_sha512" (default) The default value is *rsa_pss_sha256,rsa_pss_sha384,rsa_pss_sha512,rsa_pkcs1_sha256,rsa_pkcs1_sha384,rsa_pkcs1_sha512,ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384,ecdsa_secp521r1_sha512,ed25519,ed448*. This configuration setting is applicable only when [SSLEnabledProtocols](#SSLEnabledProtocols) includes TLS 1.3. **TLS13SupportedGroups**: The supported groups for (EC)DHE key exchange.This configuration setting specifies a comma-separated list of named groups used in TLS 1.3 for key exchange. This configuration setting should be modified only if there is a specific reason to do so. The default value is *ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192,mlkem_512,mlkem_768,mlkem_1024,x25519_mlkem_768,secp256r1_mlkem_768* The values are ordered from most preferred to least preferred. The following values are supported: - "ecdhe_x25519" (default) - "ecdhe_x448" (default) - "ecdhe_secp256r1" (default) - "ecdhe_secp384r1" (default) - "ecdhe_secp521r1" (default) - "ffdhe_2048" (default) - "ffdhe_3072" (default) - "ffdhe_4096" (default) - "ffdhe_6144" (default) - "ffdhe_8192" (default) - "mlkem_512" (default) - "mlkem_768" (default) - "mlkem_1024" (default) - "x25519_mlkem_768" (default) - "secp256r1_mlkem_768" (default) Post-quantum algorithms (*mlkem_512,mlkem_768,mlkem_1024,x25519_mlkem_768,secp256r1_mlkem_768*) in our components rely on the operating system's underlying cryptographic primitives. The following platforms are currently supported: - Windows Server 2025 - Windows 11 24H2 - Windows 11 25H2 ### Socket Config Settings **AbsoluteTimeout**: Determines whether timeouts are inactivity timeouts or absolute timeouts.If [AbsoluteTimeout](#AbsoluteTimeout) is set to True, any method that does not complete within [Timeout](#timeout-property-backblazeb2-component) seconds will be aborted. By default, *AbsoluteTimeout* is False, and the timeout is an inactivity timeout. NOTE: This option is not valid for User Datagram Protocol (UDP) ports. **FirewallData**: Used to send extra data to the firewall.When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g., headers for custom authentication schemes). **InBufferSize**: The size in bytes of the incoming queue of the socket.This is the size of an internal queue in the Transmission Control Protocol (TCP)/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. In some cases, increasing the value of the *InBufferSize* setting can provide significant improvements in performance. Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the *InBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small. **OutBufferSize**: The size in bytes of the outgoing queue of the socket.This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. In some cases, increasing the value of the *OutBufferSize* setting can provide significant improvements in performance. Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the *OutBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small. ### Base Config Settings **BuildInfo**: Information about the product's build.When queried, this setting will return a string containing information about the product's build. **GUIAvailable**: Whether or not a message loop is available for processing events.In a GUI-based application, long-running blocking operations may cause the application to stop responding to input until the operation returns. The component will attempt to discover whether or not the application has a message loop and, if one is discovered, it will process events in that message loop during any such blocking operation. In some non-GUI applications, an invalid message loop may be discovered that will result in errant behavior. In these cases, setting [GUIAvailable](#GUIAvailable) to *false* will ensure that the component does not attempt to process external events. **LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a component is using. It will return the following information: - Product: The product the license is for. - Product Key: The key the license was generated from. - License Source: Where the license was found (e.g., RuntimeLicense, License File). - License Type: The type of license installed (e.g., Royalty Free, Single Server). - Last Valid Build: The last valid build number for which the license will work. **MaskSensitiveData**: Whether sensitive data is masked in log messages.In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to *true* to mask sensitive data. The default is *true*. **UseFIPSCompliantAPI**: Tells the component whether or not to use FIPS certified APIs.When set to *true*, the component will utilize the underlying operating system's certified APIs. Java editions, regardless of OS, utilize Bouncy Castle Federal Information Processing Standards (FIPS), while all other Windows editions make use of Microsoft security libraries. FIPS mode can be enabled by setting the *UseFIPSCompliantAPI* configuration setting to *true*. This is a static setting that applies to all instances of all components of the toolkit within the process. It is recommended to enable or disable this setting once before the component has been used to establish a connection. Enabling FIPS while an instance of the component is active and connected may result in unexpected behavior. For more details, please see the [FIPS 140-2 Compliance](https://www.nsoftware.com/kb/articles/fips.rst) article. NOTE: This setting is applicable only on Windows. NOTE: Enabling FIPS compliance requires a special license; please contact [sales@nsoftware.com](mailto:sales@nsoftware.com) for details. **UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the component will use the system security libraries by default to perform cryptographic functions where applicable. In this case, calls to unmanaged code will be made. In certain environments, this is not desirable. To use a completely managed security implementation, set this setting to *true*. Setting this configuration setting to *true* tells the component to use the internal implementation instead of using the system security libraries. On Windows, this setting is set to *false* by default. On Linux/macOS, this setting is set to *true* by default. NOTE: This setting is static. The value set is applicable to all components used in the application. When this value is set, the product's system dynamic link library (DLL) is no longer required as a reference, as all unmanaged code is stored in that file. # Trappable Errors ([BackblazeB2](#backblazeb2-component) Component) ### Common Errors | | | | --- | --- | | 600 | A server error occurred, and/or the component was unable to process the server's response. Please refer to the error message for more information. | | 601 | An unsupported operation or action was attempted. | | 602 | The [RawRequest](#RawRequest) or [RawResponse](#RawResponse) configuration setting was queried without first setting the TransferredRequest configuration setting to ON. | | 603 | The login credentials specified were invalid. Please refer to the error message for more information. | | 604 | An invalid remote resource identifier (i.e., a name, path, Id, etc.) was specified. | | 605 | An invalid index was specified. | | 606 | An upload was aborted by the user before it could finish. | | 607 | The specified resource is a folder and cannot be downloaded. | | 608 | A download failed because the specified [LocalFile](#localfile-property-backblazeb2-component) already exists and [Overwrite](#overwrite-property-backblazeb2-component) is false. | | 609 | The component could not resume a download or upload. Please refer to the error message for more information. | | 610 | An encrypted download could not be resumed because the [DownloadTempFile](#DownloadTempFile) configuration setting is not set. | | 611 | An exception occurred while working with the specified [LocalFile](#localfile-property-backblazeb2-component) (or the current value of [LocalFile](#localfile-property-backblazeb2-component) is invalid). Please refer to the error message for more information. | | 612 | An exception occurred while working with the specified upload or download stream. Please refer to the error message for more information. | ### BackblazeB2 Errors | | | | --- | --- | | 700 | The current [Account](#account-property-backblazeb2-component).[AuthToken](#B2Account_f_AuthToken) has expired or is otherwise no longer valid; call [Authorize](#authorize-method-backblazeb2-component) to obtain a new one. | | 701 | The specified [DownloadAuthToken](#DownloadAuthToken) has expired or is otherwise no longer valid. | | 702 | The request failed due to a temporary server error; try again, using exponential backoff if necessary. | The component may also return one of the following error codes, which are inherited from other components. ### HTTP Errors | | | | --- | --- | | 118 | Firewall error. The error description contains the detailed message. | | 143 | Busy executing current method. | | 151 | HTTP protocol error. The error message has the server response. | | 152 | No server specified in URL. | | 153 | Specified URLScheme is invalid. | | 155 | Range operation is not supported by server. | | 156 | Invalid cookie index (out of range). | | 301 | Interrupted. | | 302 | Cannot open AttachedFile. | The component may also return one of the following error codes, which are inherited from other components. ### TCPClient Errors | | | | --- | --- | | 100 | You cannot change the RemotePort at this time. A connection is in progress. | | 101 | You cannot change the RemoteHost (Server) at this time. A connection is in progress. | | 102 | The RemoteHost address is invalid (0.0.0.0). | | 104 | Already connected. If you want to reconnect, close the current connection first. | | 106 | You cannot change the LocalPort at this time. A connection is in progress. | | 107 | You cannot change the [LocalHost](#localhost-property-backblazeb2-component) at this time. A connection is in progress. | | 112 | You cannot change [MaxLineLength](#MaxLineLength) at this time. A connection is in progress. | | 116 | RemotePort cannot be zero. Please specify a valid service port number. | | 117 | You cannot change the UseConnection option while the component is active. | | 135 | Operation would block. | | 201 | Timeout. | | 211 | Action impossible in control's present state. | | 212 | Action impossible while not connected. | | 213 | Action impossible while listening. | | 301 | Timeout. | | 303 | Could not open file. | | 434 | Unable to convert string to selected CodePage. | | 1105 | Already connecting. If you want to reconnect, close the current connection first. | | 1117 | You need to connect first. | | 1119 | You cannot change the LocalHost at this time. A connection is in progress. | | 1120 | Connection dropped by remote host. | ### SSL Errors | | | | --- | --- | | 270 | Cannot load specified security library. | | 271 | Cannot open certificate store. | | 272 | Cannot find specified certificate. | | 273 | Cannot acquire security credentials. | | 274 | Cannot find certificate chain. | | 275 | Cannot verify certificate chain. | | 276 | Error during handshake. | | 280 | Error verifying certificate. | | 281 | Could not find client certificate. | | 282 | Could not find server certificate. | | 283 | Error encrypting data. | | 284 | Error decrypting data. | ### TCP/IP Errors | | | | --- | --- | | 10004 | [10004] Interrupted system call. | | 10009 | [10009] Bad file number. | | 10013 | [10013] Access denied. | | 10014 | [10014] Bad address. | | 10022 | [10022] Invalid argument. | | 10024 | [10024] Too many open files. | | 10035 | [10035] Operation would block. | | 10036 | [10036] Operation now in progress. | | 10037 | [10037] Operation already in progress. | | 10038 | [10038] Socket operation on nonsocket. | | 10039 | [10039] Destination address required. | | 10040 | [10040] Message is too long. | | 10041 | [10041] Protocol wrong type for socket. | | 10042 | [10042] Bad protocol option. | | 10043 | [10043] Protocol is not supported. | | 10044 | [10044] Socket type is not supported. | | 10045 | [10045] Operation is not supported on socket. | | 10046 | [10046] Protocol family is not supported. | | 10047 | [10047] Address family is not supported by protocol family. | | 10048 | [10048] Address already in use. | | 10049 | [10049] Cannot assign requested address. | | 10050 | [10050] Network is down. | | 10051 | [10051] Network is unreachable. | | 10052 | [10052] Net dropped connection or reset. | | 10053 | [10053] Software caused connection abort. | | 10054 | [10054] Connection reset by peer. | | 10055 | [10055] No buffer space available. | | 10056 | [10056] Socket is already connected. | | 10057 | [10057] Socket is not connected. | | 10058 | [10058] Cannot send after socket shutdown. | | 10059 | [10059] Too many references, cannot splice. | | 10060 | [10060] Connection timed out. | | 10061 | [10061] Connection refused. | | 10062 | [10062] Too many levels of symbolic links. | | 10063 | [10063] File name is too long. | | 10064 | [10064] Host is down. | | 10065 | [10065] No route to host. | | 10066 | [10066] Directory is not empty | | 10067 | [10067] Too many processes. | | 10068 | [10068] Too many users. | | 10069 | [10069] Disc Quota Exceeded. | | 10070 | [10070] Stale NFS file handle. | | 10071 | [10071] Too many levels of remote in path. | | 10091 | [10091] Network subsystem is unavailable. | | 10092 | [10092] WINSOCK DLL Version out of range. | | 10093 | [10093] Winsock is not loaded yet. | | 11001 | [11001] Host not found. | | 11002 | [11002] Nonauthoritative 'Host not found' (try again or check DNS setup). | | 11003 | [11003] Nonrecoverable errors: FORMERR, REFUSED, NOTIMP. | | 11004 | [11004] Valid name, no data record (check DNS setup). |