OneDrive Class

Properties Methods Events Configuration Settings Errors

The OneDrive component provide an easy way to upload, download, and manage files and folders with Microsoft OneDrive.

Syntax

OneDrive

Remarks

The OneDrive class provides a simple interface to working with Microsoft OneDrive. Capabilities include uploading and downloading files, strong encryption support, creating folders, moving and copying resource, and more.

To begin, first create an account and register your application with OneDrive. Consult the OneDrive documentation for instructions on this process.

Authentication

Authentication is performed via OAuth 2.0. Use the OAuth class included in the toolkit, or any other OAuth implementation to perform authentication and retrieve an authorization string. Once you've obtained an authorization string like:

Bearer ya29.AHES6ZSZEJzATdZYjeihDn5W-VrXSsxEZu5p0pclxGdKKQ

Assign this value to the Authorization property before attempting any operations. Consult the OneDrive documentation for this particular service for more information about supported scope values and more details on OAuth authentication.

Listing Resources

ListResources lists resources within the drive at the specified path.

Calling this method without specifying ResourceParentId or ResourceParentPath will list all resources in the drive's root. To list resources of a specific folder set either ResourceParentId or ResourceParentPath prior to calling this method. When ResourceParentId is set, it takes precedence over ResourceParentPath.

When either ResourceParentId or ResourceParentPath, children of the specified parent folder will be listed. These two properties can be set before calling this method to navigate the drive. If both are specified ResourceParentId takes precedence. If both are unspecified the drive root is assumed.

After calling this method set ResourceIndex to a value from 0 to ResourceCount - 1. Setting ResourceIndex populates other Resource properties to provide information about the resource. After calling this method the following resource properties are populated:

If the results are paged ResourceMarker will be populated. Call ListResources again to retrieve the next page of results. Continue calling ListResources until ResourceMarker is empty string to retrieve all pages.

onedrive.ListResources();
for (int i = 0; i < onedrive.ResourceCount; i++)
{
  onedrive.ResourceIndex = i;
  Console.WriteLine(onedrive.ResourceName);
  Console.WriteLine(onedrive.ResourceSize);
  Console.WriteLine(onedrive.ResourceModifiedDate);
}

Downloading Files

The DownloadFile method downloads a specific file.

Any of the following properties may be set to specify the file to download:

If LocalFile is set the file will be saved to the specified location. If LocalFile is not set the file data will be held by ResourceData.

To decrypt an encrypted file set EncryptionAlgorithm and EncryptionPassword before calling this method.

onedrive.ResourceId = fileId;
onedrive.LocalFile = "../MyFile.zip";
onedrive.DownloadFile();

Resuming Downloads

The class also supports resuming failed downloads by using the StartByte property. If the download was interrupted, set StartByte to the appropriate offset before calling this method to resume the download.

onedrive.ResourceId = fileId;
onedrive.LocalFile = downloadFile;
onedrive.DownloadFile();

//The transfer is interrupted and DownloadFile() above fails. Later, resume the download:

//Get the size of the partially download file
onedrive.StartByte = new FileInfo(downloadFile).Length; 
onedrive.ResourceId = fileId;
onedrive.LocalFile = downloadFile;
onedrive.DownloadFile();

Resuming Encrypted File Downloads

Resuming encrypted file downloads is only supported when LocalFile was set in the initial download attempt. When beginning an encrypted download if LocalFile is set the class will create a temporary file in TempPath to hold the encrypted data until it is complete.

If the download is interrupted DownloadTempFile will be populated with the temporary file holding the partial data. When resuming, DownloadTempFile must be populated along with StartByte 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.

onedrive.ResourceId = fileId;
onedrive.LocalFile = downloadFile;
onedrive.EncryptionPassword = "password";
onedrive.DownloadFile();

//The transfer is interrupted and DownloadFile() above fails. Later, resume the download:

//Get the size of the partially download temp file
onedrive.StartByte = new FileInfo(onedrive.Config("DownloadTempFile")).Length; 
onedrive.ResourceId = fileId;
onedrive.LocalFile = downloadFile;
onedrive.EncryptionPassword = "password";
onedrive.DownloadFile();

Uploading Files

LocalFile specifies the file to upload. The data to upload may also be set in ResourceData .

The FileTitle parameter of UploadFile specifies the name of the file to be written in the drive.

To upload a file in a specific folder set ResourceParentId or ResourceParentPath to indicate the parent folder. If both are specified ResourceParentId takes precedence. If both are unspecified the drive root is assumed.

To encrypt a file before uploading set EncryptionAlgorithm and EncryptionPassword.

The UploadFile method returns the Id of the resource which was uploaded.

Upload Notes

Microsoft OneDrive offers two ways to upload a file. For smaller files a simple upload option is provided to upload data in one request. This is the default option. For larger files uploads can be fragmented into multiple pieces, allowing resuming of uploads that may be interrupted.

Simple

By default the class uses the simple upload mechanism. Only files up to 100 MB can be uploaded using the default simple upload.

onedrive.LocalFile = "../MyFile.zip";
onedrive.UploadFile("MyFile.zip");

The following properties are applicable when calling UploadFile and UseResumableUpload if False (default - simple upload):

Resumable

To enable resumable uploads set UseResumableUpload to True. This is recommended for files larger than 10 MB. The class will automatically fragment the specified file into smaller pieces and upload each individually. FragmentSize may be set to specify the size of the fragment if desired. The default fragment size is 10 MB.

When UseResumableUpload is set to True and UploadFile is called a resumable upload session is started by the class. ResumeURL is populated with the URL identifying the session. This value may be needed for additional operations if the upload does not complete normally. Additionally StartByte is updated as necessary by the class to indicate the current offset in the file.

If the upload is interrupted for any reason the upload may be resumed. To resume an upload verify that ResumeURL and StartByte are populated. If the same instance of the class is used these should already be populated and no special action is needed. Call UploadFile again to resume the upload at the specified StartByte offset.

If a resumable upload is interrupted for any reason, AbortUpload may be called to cancel the upload. If the upload is not resumed after some time the upload session will expire. UploadExpDate may be checked to determine when the upload session expires.

GetUploadStatus may be used to check the status of a resumable upload. The FragmentComplete event fires after each fragment is uploaded to indicate overall progress.

onedrive.LocalFile = "../MyFile.zip";
onedrive.UploadFile("MyFile.zip");

//The transfer is interrupted and UploadFile() above fails. Later, resume the download.
//Using the same instance StartByte and ResumeURL are already populated 
//from the previous upload attempt
onedrive.UploadFile("MyFile.zip");

The following properties are applicable when calling UploadFile and UseResumableUpload if True:

Additional Functionality

The OneDrive component offers advanced functionality beyond simple uploads and downloads. For instance:

Encrypt and decrypt files using EncryptionAlgorithm and EncryptionPassword.
Use CopyResource, MoveResource, DeleteResource, and UpdateResource to manage files and folders.
CreateLink creates shareable links to content.
ListChanges lists all changes in a drive from a given point to facilitate syncing local and remote copies.
Search can be used to search for matching content.
ListDrives provides the capability for multiple drives.
And more!

Property List

The following is the full list of the properties of the class with short descriptions. Click on the links for further details.


Authorization	OAuth 2.0 Authorization Token.
CopyPercentDone	The progress of the copy operation.
CopyStatus	The status of the copy operation.
DriveCount	The number of drives available to the user.
DriveDeletedSpace	The space consumed by deleted files in bytes.
DriveId	The unique id of the selected drive.
DriveIndex	Selects a drive.
DriveOwnerId	The Id of the drive owner.
DriveOwnerName	The name of the drive owner.
DriveRemainingSpace	The remaining unused space in bytes.
DriveState	The state of the drive space.
DriveTotalSpace	The total space of the drive in bytes.
DriveType	The type of drive.
DriveUsedSpace	The used space in bytes.
EncryptionAlgorithm	The encryption algorithm.
EncryptionPassword	The encryption password.
FirewallAutoDetect	This property tells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallType	This property determines the type of firewall to connect through.
FirewallHost	This property contains the name or IP address of firewall (optional).
FirewallPassword	This property contains a password if authentication is to be used when connecting through the firewall.
FirewallPort	This property contains the TCP port for the firewall Host .
FirewallUser	This property contains a user name if authentication is to be used connecting through a firewall.
LocalFile	The location of the local file.
LocalHost	The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
Overwrite	Whether to overwrite the local or remote file.
ProxyAuthScheme	This property is used to tell the component which type of authorization to perform when connecting to the proxy.
ProxyAutoDetect	This property tells the component whether or not to automatically detect and use proxy system settings, if available.
ProxyPassword	This property contains a password if authentication is to be used for the proxy.
ProxyPort	This property contains the TCP port for the proxy Server (default 80).
ProxyServer	If a proxy Server is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.
ProxySSL	This property determines when to use SSL for the connection to the proxy.
ProxyUser	This property contains a user name, if authentication is to be used for the proxy.
QueryParamsCount	The number of records in the QueryParams arrays.
QueryParamsName	This property contains the name of the parameter to be used in a Query request.
QueryParamsValue	This property contains the value of the parameter to be used in a Query request.
ResourceChildren	The number of immediate children in the selected folder.
ResourceCount	The number of files and folders.
ResourceCRC32Hash	The CRC32 hash value.
ResourceCreatedDate	The date when the item was created.
ResourceData	Holds the file data after downloading or sets the file data before uploading or updating.
ResourceDeleted	Whether the resource is deleted.
ResourceDescription	A short description of the file or folder.
ResourceDownloadURL	The URL used to download the file contents.
ResourceETag	The ETag of the resource.
ResourceId	The unique identifier of the resource.
ResourceIndex	Selects the file or folder.
ResourceMarker	The marker specifying the next set of results.
ResourceMIMEType	The MIME type of the file.
ResourceModifiedDate	The date when the item was modified.
ResourceName	The name of the resource.
ResourceParentId	The Id of the parent resource.
ResourceParentPath	The path of the parent resource.
ResourcePath	The full path to the specified resource.
ResourceSHA1Hash	The SHA-1 hash value.
ResourceSize	The size of the resource in bytes.
ResourceType	Indicates whether the current entry is a folder or a file.
ResourceWebURL	The URL to view the resource in a browser.
ResumeURL	The URL for the resumable upload.
SSLAcceptServerCertEncoded	The certificate (PEM/base64 encoded).
SSLCertEncoded	The certificate (PEM/base64 encoded).
SSLCertStore	The name of the certificate store for the client certificate.
SSLCertStorePassword	If the certificate store is of a type that requires a password, this property is used to specify that password in order to open the certificate store.
SSLCertStoreType	The type of certificate store for this certificate.
SSLCertSubject	The subject of the certificate used for client authentication.
SSLServerCertEncoded	The certificate (PEM/base64 encoded).
StartByte	The byte offset from which to start the upload or download.
Timeout	A timeout for the component.
URL	The server URL.
UseResumableUpload	Whether to use resumable uploads.

Method List

The following is the full list of the methods of the class with short descriptions. Click on the links for further details.


AbortUpload	Aborts the resumable upload session.
AddQueryParam	Adds a query parameter to the QueryParams properties.
Config	Sets or retrieves a configuration setting .
CopyResource	Copies the specified resource.
CreateFolder	Creates a new folder.
CreateLink	Creates a link for sharing the resource.
DeleteResource	Deletes the specified resource.
DownloadFile	Downloads the specified file.
GetCopyInfo	Gets information about the copy operation.
GetDriveInfo	Gets information about the drive.
GetResourceInfo	Gets information about the resource.
GetUploadStatus	Get the status of a resumable upload session.
Interrupt	Interrupt the current method.
ListChanges	Lists changes to the drive.
ListDrives	List drives available to the user.
ListResources	List resources in the current folder.
MoveResource	Moves the specified resource to a new folder.
Search	This method searches for resources matching the specified query.
UpdateResource	Updates the resource.
UploadFile	Uploads a file.

Event List

The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.


DriveList	Fired for each drive when ListDrives is called.
EndTransfer	Fired when a document finishes transferring.
Error	Information about errors during data delivery.
FragmentComplete	This event fires after each fragment of a resumable upload is completed.
ResourceList	Fired for each resource listed.
SSLServerAuthentication	Fired after the server presents its certificate to the client.
SSLStatus	Shows the progress of the secure connection.
StartTransfer	Fired when a document starts transferring (after the headers).
Transfer	Fired while a document transfers (delivers document).

Configuration Settings

The following is a list of configuration settings for the class with short descriptions. Click on the links for further details.


CopyStatusURL	The URL from which copy status info is obtained.
DownloadTempFile	The temporary file used when downloading encrypted data.
FragmentSize	The fragment size.
MaxResults	The maximum number of results to return when calling ListResources.
RenameIfExists	Whether to rename the uploaded file if it exists.
TempPath	The path to the directory where temporary files are created.
UploadExpDate	The expiration of the resumable upload session.
EncryptionIV	The initialization vector to be used for encryption/decryption.
EncryptionKey	The key to use during encryption/decryption.
XPath	Provides a way to point to a specific element in the returned XML response.
XElement	The name of the current element.
XParent	The parent of the current element.
XSubTree	A snapshot of the current element in the document.
XText	The text of the current element.
XChildCount	The number of child elements of the current element.
XChildName[x]	The name of the child element.
XChildXText[x]	The inner text of the child element.
AcceptEncoding	Used to tell the server which types of content encodings the client supports.
AllowHTTPCompression	This property enables HTTP compression for receiving data.
AllowIdenticalRedirectURL	Allow redirects to the same URL.
Append	Whether to append data to LocalFile.
Authorization	The Authorization string to be sent to the server.
BytesTransferred	Contains the number of bytes transferred in the response data.
EncodeURL	If set to true the URL will be encoded by the component.
FollowRedirects	Determines what happens when the server issues a redirect.
GetOn302Redirect	If set to true the component will perform a GET on the new location.
HTTPVersion	The version of HTTP used by the component.
IfModifiedSince	A date determining the maximum age of the desired document.
KeepAlive	Determines whether the HTTP connection is closed after completion of the request.
MaxRedirectAttempts	Limits the number of redirects that are followed in a request.
OtherHeaders	Other headers as determined by the user (optional).
ProxyAuthorization	The authorization string to be sent to the proxy server.
ProxyAuthScheme	The authorization scheme to be used for the proxy.
ProxyPassword	A password if authentication is to be used for the proxy.
ProxyPort	Port for the proxy server (default 80).
ProxyServer	Name or IP address of a proxy server (optional).
ProxyUser	A user name if authentication is to be used for the proxy.
TransferredDataLimit	The maximum number of incoming bytes to be stored by the component.
TransferredHeaders	The full set of headers as received from the server.
UseChunkedEncoding	Enables or Disables HTTP chunked encoding for transfers.
ChunkSize	Specifies the chunk size in bytes when using chunked encoding.
UserAgent	Information about the user agent (browser).
KerberosSPN	The Service Principal Name for the Kerberos Domain Controller.
ConnectionTimeout	Sets a separate timeout value for establishing a connection.
FirewallAutoDetect	Tells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHost	Name or IP address of firewall (optional).
FirewallPassword	Password to be used if authentication is to be used when connecting through the firewall.
FirewallPort	The TCP port for the FirewallHost;.
FirewallType	Determines the type of firewall to connect through.
FirewallUser	A user name if authentication is to be used connecting through a firewall.
KeepAliveTime	The inactivity time in milliseconds before a TCP keep-alive packet is sent.
KeepAliveInterval	The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
Linger	When set to True, connections are terminated gracefully.
LingerTime	Time in seconds to have the connection linger.
LocalHost	The name of the local host through which connections are initiated or accepted.
LocalPort	The TCP port in the local host where the component binds.
MaxLineLength	The maximum amount of data to accumulate when no EOL is found.
MaxTransferRate	The transfer rate limit in bytes per second.
RecordLength	The length of received data records.
TCPKeepAlive	Determines whether or not the keep alive socket option is enabled.
UseIPv6	Whether to use IPv6.
TcpNoDelay	Whether or not to delay when sending packets.
ReuseSSLSession	Determines if the SSL session is reused.
SSLCipherStrength	The minimum cipher strength used for bulk encryption.
SSLEnabledProtocols	Used to enable/disable the supported security protocols.
SSLProvider	The name of the security provider to use.
SSLSecurityFlags	Flags that control certificate verification.
OpenSSLCADir	The path to a directory containing CA certificates.
OpenSSLCAFile	Name of the file containing the list of CA's trusted by your application.
OpenSSLCipherList	A string that controls the ciphers to be used by SSL.
OpenSSLPrngSeedData	The data to seed the pseudo random number generator (PRNG).
AbsoluteTimeout	Determines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallData	Used to send extra data to the firewall.
InBufferSize	The size in bytes of the incoming queue of the socket.
OutBufferSize	The size in bytes of the outgoing queue of the socket.
CodePage	The system code page used for Unicode to Multibyte translations.