Wasabi Class

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The Wasabi class provides an easy way to interface with the Wasabi service.

Syntax

cloudstorage.Wasabi

Remarks

Wasabi has an API that is fully compatible with that of Amazon S3, allowing you to store arbitrary data using the same bucket-and-object paradigm that S3 uses. Wasabi adds additional functionality on top of the S3 API. Whether you're doing simple bucket-and-object data manipulation, or leveraging Wasabi-exclusive API features, the Wasabi class makes it easy to access the Wasabi service quickly and securely.

Wasabi's API additions range in scale; the simplest example is the ability to rename buckets, objects, and folders. The most notable API additions, however, are two full-blown headline features: Composition and Compliance. Composition allows you to concatenate (or, "compose") together objects which are already on the server; it's a simpler, cheaper, and more flexible alternative to S3's multipart uploads. The Compliance system gives you the ability to define policies that dictate how long objects must be retained before they can be modified or deleted. We recommend referring to Wasabi's website for more details about these features.

To use the Wasabi class, you will first need to sign up for the Wasabi service and obtain an AccessKey and a SecretKey. Then you can start creating buckets in your account using CreateBucket. The buckets are place holders for your objects allowing you to access them by http URLs. You can then add objects to any of your buckets using CreateObject.

The ComposeObjects and UpdateCompliance methods' documentation provide extensive usage details and examples for composition and compliance; the RenameBucket, RenameObject, and RenameFolder methods speak for themselves; and the standard bucket-and-object manipulation features are available through methods such as ListBuckets, ListObjects, GetObject, DeleteObject, GetLink, 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.

Method List

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

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.

Config Settings

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

AccessKey Property (Wasabi Class)

The access key to use for authentication.

Syntax

public String getAccessKey();
public void setAccessKey(String accessKey);

Default Value

""

Remarks

This property specifies the access key that should be used for authentication. Both this property and SecretKey must be set before attempting any operations which connect to the server.

AccessPolicy Property (Wasabi Class)

The canned access policy to apply to a bucket or object.

Syntax

public int getAccessPolicy();
public void setAccessPolicy(int accessPolicy);

Enumerated values:
  public final static int ptPrivate = 0;
  public final static int ptPublicRead = 1;
  public final static int ptPublicReadWrite = 2;
  public final static int ptAuthenticatedRead = 3;
  public final static int ptBucketOwnerRead = 4;
  public final static int ptBucketOwnerFullControl = 5;
  public final static int ptNone = 6;

Default Value

0

Remarks

This property specifies the canned access policy that should be applied to a bucket or object when one of the following methods is called:

• CopyObject (for the destination object)
• CreateBucket
• CreateObject
• StartMultipartUpload
• UpdateBucketACL
• UpdateObjectACL

Valid values are:

Bucket Property (Wasabi Class)

Selects a bucket.

Syntax

public String getBucket();
public void setBucket(String bucket);

Default Value

""

Remarks

This property selects a bucket, by name, for the class to operate against. It must be set before attempting most operations.

BucketCompliance Property (Wasabi Class)

Represents a bucket's compliance settings.

Syntax

public WasabiBucketCompliance getBucketCompliance();
public void setBucketCompliance(WasabiBucketCompliance bucketCompliance);

Remarks

This type is used to hold a bucket's compliance settings.

Refer to the UpdateCompliance documentation for more information about compliance.

Buckets Property (Wasabi Class)

A collection of buckets.

Syntax

public S3BucketList getBuckets();

Remarks

This collection holds a list of S3Bucket items.

Calling ListBuckets will populate this collection.

This property is read-only and not available at design time.

ContentDisposition Property (Wasabi Class)

Content disposition to send for an object.

Syntax

public String getContentDisposition();
public void setContentDisposition(String contentDisposition);

Default Value

""

Remarks

This property can be set before calling CreateObject to have its value submitted as the object's Content-Disposition header value. This same value will then be returned in the Content-Disposition header by the server anytime the object is downloaded.

This property is not available at design time.

ContentType Property (Wasabi Class)

Content type to send for an object.

Syntax

public String getContentType();
public void setContentType(String contentType);

Default Value

""

Remarks

This property can be set before calling CreateObject to have its value submitted as the object's Content-Type header value. This same value will then be returned in the Content-Type header by the server anytime the object is downloaded.

This property is not available at design time.

EncryptionAlgorithm Property (Wasabi Class)

The encryption algorithm.

Syntax

public int getEncryptionAlgorithm();
public void setEncryptionAlgorithm(int encryptionAlgorithm);

Enumerated values:
  public final static int eaAES = 0;
  public final static int eaBlowfish = 1;
  public final static int eaCAST = 2;
  public final static int eaDES = 3;
  public final static int eaIDEA = 4;
  public final static int eaRC2 = 5;
  public final static int eaRC4 = 6;
  public final static int eaTEA = 7;
  public final static int eaTripleDES = 8;
  public final static int eaTwofish = 9;
  public final static int eaRijndael = 10;
  public final static int eaChaCha = 11;
  public final static int eaXSalsa20 = 12;

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:

EncryptionPassword Property (Wasabi Class)

The encryption password.

Syntax

public String getEncryptionPassword();
public void setEncryptionPassword(String encryptionPassword);

Default Value

""

Remarks

If this property is populated when UploadFile or DownloadFile is called, the class will attempt to encrypt or decrypt the data before uploading or after downloading it.

The class 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 and 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.

Firewall Property (Wasabi Class)

A set of properties related to firewall access.

Syntax

public Firewall getFirewall();
public void setFirewall(Firewall firewall);

Remarks

This is a Firewall-type property, which contains fields describing the firewall through which the class will attempt to connect.

FollowRedirects Property (Wasabi Class)

Determines what happens when the server issues a redirect.

Syntax

public int getFollowRedirects();
public void setFollowRedirects(int followRedirects);

Enumerated values:
  public final static int frNever = 0;
  public final static int frAlways = 1;
  public final static int frSameScheme = 2;

Default Value

0

Remarks

This property specifies how the class should behave when the server returns a redirect response (e.g. "Object Moved"). Valid values are:

Idle Property (Wasabi Class)

The current status of the class.

Syntax

public boolean isIdle();

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 (Wasabi Class)

The location of the local file.

Syntax

public String getLocalFile();
public void setLocalFile(String localFile);

Default Value

""

Remarks

This property specifies the location of a file on disk. This is used as the source file when calling CreateObject or UploadPart; and as the destination file when calling GetObject.

Note: Setting this property to a non-empty value will discard any streams set using SetDownloadStream and SetUploadStream. Similarly, passing a non-null value to either of the aforementioned methods will clear this property.

LocalHost Property (Wasabi Class)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

public String getLocalHost();
public void setLocalHost(String localHost);

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 class initiate connections (or accept in the case of server classs) 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 class 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 (Wasabi Class)

A collection of metadata items.

Syntax

public S3MetadataList getMetadata();
public void setMetadata(S3MetadataList metadata);

Remarks

This collection holds a list of S3Metadata items.

This collection is populated when GetObjectInfo is called; and its items are used anytime CreateObject, CopyObject, or StartMultipartUpload is called.

This property is not available at design time.

ObjectCompliance Property (Wasabi Class)

Represents an object's compliance settings.

Syntax

public WasabiObjectCompliance getObjectCompliance();
public void setObjectCompliance(WasabiObjectCompliance objectCompliance);

Remarks

This type is used to hold an object's compliance settings.

Refer to the UpdateCompliance documentation for more information about compliance.

ObjectData Property (Wasabi Class)

The data that was downloaded, or that should be uploaded.

Syntax

public byte[] getObjectData();
public void setObjectData(byte[] objectData);

Default Value

""

Remarks

This property is populated with object data after calling GetObject if SetDownloadStream and LocalFile are not set.

This property can also be set before calling CreateObject or UploadPart; its data will be uploaded if SetUploadStream and LocalFile are not set.

This property is not available at design time.

ObjectDelimiter Property (Wasabi Class)

The delimiter string to use when listing objects.

Syntax

public String getObjectDelimiter();
public void setObjectDelimiter(String objectDelimiter);

Default Value

""

Remarks

If this property is non-empty when ListObjects or ListVersions is called, any objects (or object versions) whose names contain the same string between the specified ObjectPrefix and the first occurrence of the specified delimiter that follow will be rolled up into a "common prefix" element, which is returned in place of the individual objects themselves.

The PrefixList event will fire once for each common prefix returned. If the StorePrefixList configuration setting is enabled, the class will also populate the PrefixCount and Prefix[i] configuration settings

Object Hierarchy Traversal

By using the ObjectDelimiter and ObjectPrefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of objects (or object versions) as if it were a filesystem. For example, assume that objects with the following names exist within a bucket:

• MyCompany/
• MyCompany/Department1/
• MyCompany/Department2/
• MyCompany/Department2/EmployeeA
• MyCompany/Department2/EmployeeB

With ObjectDelimiter set to /, we can set ObjectPrefix to successively "deeper" values before calling ListObjects or ListVersions for the following effect:

This property is not available at design time.

ObjectMarker Property (Wasabi Class)

A marker indicating what page of objects to return next.

Syntax

public String getObjectMarker();
public void setObjectMarker(String objectMarker);

Default Value

""

Remarks

This property will be populated when ListObjects is called if the results are paged and there are more pages. To list all objects, continue to call ListObjects until this property returns empty string.

Refer to ListObjects for more information.

This property is not available at design time.

ObjectPrefix Property (Wasabi Class)

A prefix used to restrict the results returned when listing objects.

Syntax

public String getObjectPrefix();
public void setObjectPrefix(String objectPrefix);

Default Value

""

Remarks

This property, if non-empty, is used to restrict the results returned by ListObjects (or ListVersions) to only the objects (or object versions) whose names begin with the given value.

Object Hierarchy Traversal

By using the ObjectDelimiter and ObjectPrefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of objects (or object versions) as if it were a filesystem. For example, assume that objects with the following names exist within a bucket:

• MyCompany/
• MyCompany/Department1/
• MyCompany/Department2/
• MyCompany/Department2/EmployeeA
• MyCompany/Department2/EmployeeB

With ObjectDelimiter set to /, we can set ObjectPrefix to successively "deeper" values before calling ListObjects or ListVersions for the following effect:

This property is not available at design time.

Objects Property (Wasabi Class)

A collection of objects.

Syntax

public S3ObjectList getObjects();
public void setObjects(S3ObjectList objects);

Remarks

This collection holds a list of S3Object items.

Calling GetObjectInfo, ListObjects, ListVersions, or ListMultipartUploads will populate this collection.

This property is not available at design time.

OtherHeaders Property (Wasabi Class)

Other headers as determined by the user (optional).

Syntax

public String getOtherHeaders();
public void setOtherHeaders(String otherHeaders);

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 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 class beyond what is provided.

This property is not available at design time.

Overwrite Property (Wasabi Class)

Determines if local files are overwritten.

Syntax

public boolean isOverwrite();
public void setOverwrite(boolean overwrite);

Default Value

False

Remarks

This property controls whether local files are overwritten when calling GetObject. It is only applicable to local files. The default value is false.

ParsedHeaders Property (Wasabi Class)

This property includes a collection of headers returned from the last request.

Syntax

public HeaderList getParsedHeaders();

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 in this collection contains information describing that header.

MaxHeaders can be used to control the maximum number of headers saved.

This collection is indexed from 0 to size -1.

This property is read-only and not available at design time.

PartMarker Property (Wasabi Class)

A marker indicating what page of parts to return next.

Syntax

public String getPartMarker();
public void setPartMarker(String partMarker);

Default Value

""

Remarks

This property will be populated when ListParts is called if the results are paged and there are more pages. To list all parts, continue to call ListParts until this property returns empty string.

Refer to ListParts for more information.

This property is not available at design time.

Parts Property (Wasabi Class)

A collection of multipart upload parts.

Syntax

public S3PartList getParts();

Remarks

This collection holds a list of S3Part items.

Calling ListParts will populate this collection.

This property is read-only and not available at design time.

Proxy Property (Wasabi Class)

A set of properties related to proxy access.

Syntax

public Proxy getProxy();
public void setProxy(Proxy proxy);

Remarks

This property contains fields describing the proxy through which the class will attempt to connect.

QueryParams Property (Wasabi Class)

Additional query parameters to be included in the request.

Syntax

public QueryParamList getQueryParams();
public void setQueryParams(QueryParamList queryParams);

Remarks

This is a collection of query parameters that will be added to the request. Parameters can be added via the AddQueryParam method.

Range Property (Wasabi Class)

The range of bytes to request.

Syntax

public String getRange();
public void setRange(String range);

Default Value

""

Remarks

This property specifies the range of bytes to request from the server. If this property is non-empty when a GetObject 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 property is greater than zero when GetObject is called (i.e., when a download is being resumed), and this property is non-empty, the class will automatically advance the StartByte value in the specified range by StartByte 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.

Region Property (Wasabi Class)

The region the class will make requests against.

Syntax

public String getRegion();
public void setRegion(String region);

Default Value

"us-east-1"

Remarks

This property control which region the class will make requests against. By default the class uses us-east-1, the US East (Ashburn, VA) region. This property should be changed to create or access resources in other regions.

Regions:

The class will always convert this property's value to lowercase. If this property is cleared, the class will reset it to the default value.

SecretKey Property (Wasabi Class)

The secret key to use for authentication.

Syntax

public String getSecretKey();
public void setSecretKey(String secretKey);

Default Value

""

Remarks

This property specifies the secret key that should be used for authentication. Both this property and AccessKey must be set before attempting any operations which connect to the server.

SSLAcceptServerCert Property (Wasabi Class)

Instructs the class to unconditionally accept the server certificate that matches the supplied certificate.

Syntax

public Certificate getSSLAcceptServerCert();
public void setSSLAcceptServerCert(Certificate SSLAcceptServerCert);

Remarks

If it finds any issues with the certificate presented by the server, the class 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.

SSLCert Property (Wasabi Class)

The certificate to be used during Secure Sockets Layer (SSL) negotiation.

Syntax

public Certificate getSSLCert();
public void setSSLCert(Certificate SSLCert);

Remarks

This property includes the digital certificate that the class 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 field to the encoded certificate. To select a certificate, use the store and subject fields.

SSLProvider Property (Wasabi Class)

The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.

Syntax

public int getSSLProvider();
public void setSSLProvider(int SSLProvider);

Enumerated values:
  public final static int sslpAutomatic = 0;
  public final static int sslpPlatform = 1;
  public final static int sslpInternal = 2;

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 class 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:

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected, the platform implementation is used by default. When TLS 1.3 is enabled via SSLEnabledProtocols, the internal implementation is used.

SSLServerCert Property (Wasabi Class)

The server certificate for the last established connection.

Syntax

public Certificate getSSLServerCert();

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.

StartByte Property (Wasabi Class)

The byte offset from which to resume the upload or download.

Syntax

public long getStartByte();
public void setStartByte(long startByte);

Default Value

0

Remarks

This property specifies the byte offset from which to resume an automatic multipart upload initiated by CreateObject, or a download initiated by GetObject. Refer to those methods' documentation for more information about resuming uploads and downloads.

When uploading from a stream, the class will always seek forward in the stream if the value of StartByte is greater than 0 when CreateObject is called. Keep this in mind when resuming interrupted object uploads.

This property is not available at design time.

Timeout Property (Wasabi Class)

The timeout for the class.

Syntax

public int getTimeout();
public void setTimeout(int timeout);

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 class will wait for the operation to complete before returning control.

The class 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 class 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.

UseSSL Property (Wasabi Class)

Whether to use SSL/TLS when connecting.

Syntax

public boolean isUseSSL();
public void setUseSSL(boolean useSSL);

Default Value

True

Remarks

This property specifies whether the class should use SSL/TLS when connecting.

This property is not available at design time.

UseVirtualHosting Property (Wasabi Class)

Determines which style request to use.

Syntax

public boolean isUseVirtualHosting();
public void setUseVirtualHosting(boolean useVirtualHosting);

Default Value

True

Remarks

If set to true (default), buckets will be referenced in the request using the hosted-style request: http://yourbucket.s3.wasabisys.com/yourobject. If false, the class will use the path-style request: http://s3.wasabisys.com/yourbucket/yourobject.

NOTE: When set to true, there are more limitations when choosing a bucket name due to DNS server naming restrictions. Wasabi follows Amazon's naming restrictions, so refer to Amazon's S3 documentation for more information.

This property is not available at design time.

VersionId Property (Wasabi Class)

The object version to make requests against.

Syntax

public String getVersionId();
public void setVersionId(String versionId);

Default Value

""

Remarks

This property can be set to the Id of a specific object version before calling the following methods in order to make requests against the specified object version instead of the base object; refer to each one's documentation for more information:

• CopyObject (to copy from a specific object version)
• DeleteObject
• GetLink (to build a link for a specific object version)
• GetObject
• GetObjectInfo
• SendCustomRequest
• UpdateObjectACL

Refer to Amazon's Versioning documentation for more information about versioning.

This property is not available at design time.

VersionMarker Property (Wasabi Class)

A marker indicating what page of object versions to return next.

Syntax

public String getVersionMarker();
public void setVersionMarker(String versionMarker);

Default Value

""

Remarks

This property will be populated when ListVersions is called if the results are paged and there are more pages. To list all object versions, continue to call ListVersions until this property returns empty string.

Refer to ListVersions for more information.

This property is not available at design time.

AbortMultipartUpload Method (Wasabi Class)

Aborts a multipart upload.

Syntax

public void abortMultipartUpload(String objectName, String uploadId);

Remarks

This method aborts the multipart upload of the object named ObjectName specified by UploadId.

When this method is called, all parts that have been uploaded for the multipart upload are deleted from the server. (Note that if any part uploads are currently in progress, it may be necessary to call this method again after they complete.)

If this method is called successfully, the specified UploadId will no longer be valid.

AddMetadata Method (Wasabi Class)

Adds a metadata item to the Metadata properties.

Syntax

public void addMetadata(String name, String value);

Remarks

This method adds a metadata item to the Metadata collection. Name specifies the name of the item, and Value specifies the value of the item. Keep in mind that the server stores metadata names in lowercase.

If Name begins with a service-specific metadata (e.g., x-amz-meta-, x-goog-meta-, etc.), it will be stripped off. The class will take care of prepending it when sending metadata to the server.

AddQueryParam Method (Wasabi Class)

Adds a query parameter to the QueryParams properties.

Syntax

public void addQueryParam(String name, String value);

Remarks

This method is used to add a query parameter to the QueryParams collection. Name specifies the name of the parameter, and Value specifies the value of the parameter.

All specified Values will be URL encoded by the class automatically. Consult the service documentation for details on the available parameters.

AppendObject Method (Wasabi Class)

Appends data onto an object on the server.

Syntax

public void appendObject(String objectName);

Remarks

This method will append the content of the file specified by LocalFile into the bucket specified by the Bucket property. If LocalFile is empty, the contents of the ObjectData property will be uploaded instead. SetUploadStream may also be used to specify the data to upload.

You may only append to an object that already exists. To create a new object, use the CreateObject method.

Note: Appending is a form of object composition, so the same restrictions that apply for object composition also apply when appending to objects; refer to ComposeObjects for more information.

BucketExists Method (Wasabi Class)

Checks whether the bucket exists.

Syntax

public boolean bucketExists();

Remarks

This method checks whether the bucket specified by Bucket exists, returning true if so or false if not.

CheckVersioningEnabled Method (Wasabi Class)

Checks whether versioning is enabled for the currently selected bucket.

Syntax

public boolean checkVersioningEnabled();

Remarks

This method can be used to check whether the bucket currently selected by Bucket has versioning enabled.

Note that if Bucket is empty, or refers to a bucket that does not exist, this method will always return false when queried.

Refer to Amazon's Versioning documentation for more information about versioning.

CompleteMultipartUpload Method (Wasabi Class)

Completes a multipart upload by assembling previously uploaded parts.

Syntax

public void completeMultipartUpload(String objectName, String uploadId);

Remarks

This method completes the multipart upload specified by UploadId. The server will assemble all of the parts that have been uploaded into an object named ObjectName.

Note that this method automatically calls ListParts internally to obtain the information needed to complete the multipart upload. This process does not alter the Parts collection, nor does it cause the PartList event to fire.

ComposeObjects Method (Wasabi Class)

Creates a composed object using multiple objects already on the server.

Syntax

public void composeObjects(String composedObjectName);

Remarks

This method is used to compose objects on the server. Object composition is a server-side method of building an object by concatenating multiple existing objects together. This feature is a simpler alternative to the typical multipart-upload method of building objects.

A composed object looks and acts just like a regular object. However, its data is determined by its component objects (that is, the objects that make it up) and the order in which they are composed together.

To use this method, specify the names of the objects that should be composed together using the Objects property. When this method is called, the ComposedObjectName parameter determines what name is given to the resulting composed object. See the following code snippet for examples: // Upload some objects to start with. Let's assume we have some text files to upload. for (int i = 1; i <= 3; i++) { wasabi.LocalFile = "file" + i + ".txt"; wasabi.CreateObject("file" + i + ".txt"); } // Compose a new object. SetObjectNames("file1.txt", "file2.txt", "file3.txt"); wasabi.ComposeObjects("composed1.txt"); // Compose a new object using a composed object. SetObjectNames("file1.txt", "composed1.txt"); wasabi.ComposeObjects("composed2.txt"); // Compose onto an existing composed object. // (Similar to appending, but all server-side, no uploading needed.) SetObjectNames("file1.txt", "file2.txt"); wasabi.ComposeObjects("composed3.txt"); SetObjectNames("composed3.txt", "file3.txt"); wasabi.ComposeObjects("composed3.txt"); // Compose a new object using the same object twice. SetObjectNames("file1.txt", "file1.txt"); wasabi.ComposeObjects("composed4.txt"); // Compose a composed object onto itself. SetObjectNames("composed4.txt", "composed4.txt"); wasabi.ComposeObjects("composed4.txt"); Assume we have this helper method for the above code: void SetObjectNames(params string[] names) { wasabi.Objects.Clear(); foreach (string name in names) wasabi.Objects.Add(new S3Object(name, "", 0, "", "", "", "", "")); }

Object composition is a powerful and flexible feature. However, there are some things to keep in mind when doing object composition:

• The order of the object names in the Objects property is the order that they will be concatenated in when they are composed.
• Objects from multiple buckets cannot be composed together.
• No more than 32 object names may be specified in a single compose request.
• No more than 1024 original objects may be composed together. This is a transitive limit, it cannot be circumvented by composing together composed objects.

Wasabi does not make copies of data when composing objects, it uses references, so there are no extra data charges. Even if the original objects are deleted, a single copy of the data is kept until there are no longer any composed objects which reference it. Refer to the Wasabi documentation for more information.

Config Method (Wasabi Class)

Sets or retrieves a configuration setting.

Syntax

public String config(String configurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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, you must call Config("PROPERTY"). The value will be returned as a string.

CopyObject Method (Wasabi Class)

Copies an object.

Syntax

public void copyObject(String srcObjectName, String destBucket, String destObjectName);

Remarks

This method copies the object specified by SrcObjectName (in the bucket currently selected by Bucket) to the object specified by DestObjectName in DestBucket. If DestBucket is empty, the bucket specified by Bucket is used as the destination bucket.

If the VersionId property is non-empty, the specified version of the source object will be used as the copy source. In this case, DestObjectName may be the same as SrcObjectName to "promote" the version, copying its contents back to the base object.

If there are any metadata items present in the Metadata collection, they will set on the destination object; otherwise, the server will copy any metadata items present on the source object to the destination object.

Notes:

• Objects may only be copied to buckets that exist within the same region.
• Objects larger than 5GB cannot be copied using this method. To copy such objects, start a new multipart upload for the destination object using StartMultipartUpload, and then use the CopyPart method to create parts for said multipart upload using the source object's data.

CopyPart Method (Wasabi Class)

Copies the specified object as a part of a multipart upload.

Syntax

public void copyPart(String srcObjectName, String destBucket, String destObjectName, int destPartNumber, String destUploadId);

Remarks

This method copies data from the object specified by SrcObjectName (in the bucket currently selected by Bucket) to a new multipart upload part for DestObjectName in DestBucket.

The DestPartNumber and DestUploadId parameters should be used in the same manner as the UploadPart method's PartNumber and UploadId parameters.

To copy a specific range of bytes from the source object, set the CopyPartRange configuration setting before calling this method.

CreateBucket Method (Wasabi Class)

Creates a new bucket.

Syntax

public void createBucket();

Remarks

This method creates a new bucket using the name specified by the Bucket property. The bucket is created in the region specified by the Region property.

CreateObject Method (Wasabi Class)

Creates a new object in the currently selected bucket.

Syntax

public void createObject(String objectName);

Remarks

This method creates a new object named Object in the bucket currently selected by Bucket. If there are any metadata items present in the Metadata collection, they will included in the creation request.

If SetUploadStream has been used to set an upload stream, it will take priority as the data source. If LocalFile is set the file will be uploaded from the specified path. If LocalFile is not set the data in ObjectData will be used.

To encrypt the file before uploading it, set EncryptionAlgorithm and EncryptionPassword.

This method can automatically handle the multipart upload of objects (See Below). If it is desired to manually take control of the multipart upload process see StartMultipartUpload.

Automatic Multipart Uploads

If more than SimpleUploadLimit bytes of data are provided, the class will automatically perform a multipart upload by splitting the data up into parts (sized according to the FragmentSize configuration setting) and uploading them individually. To accomplish this, the class automatically makes calls to StartMultipartUpload, UploadPart, and CompleteMultipartUpload internally; tracks upload state information using the ResumableUploadState configuration setting; and tracks how much data has been uploaded using the StartByte property. The FragmentComplete 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 and StartByte contain the same values as they did when the upload was interrupted.

When an automatic multipart upload completes successfully, ResumableUploadState is cleared and StartByte is reset to 0.

DeleteBucket Method (Wasabi Class)

Deletes a bucket.

Syntax

public void deleteBucket();

Remarks

This method deletes the bucket currently selected by Bucket. Note that bucket names share a global namespace, and it may not be possible to recreate a deleted bucket if its name has been taken by another user in the meantime.

DeleteObject Method (Wasabi Class)

Deletes an object.

Syntax

public void deleteObject(String objectName);

Remarks

This method deletes the object specified by ObjectName in the bucket currently selected by Bucket.

If the VersionId property is non-empty, this method deletes the specified version of the object instead.

Deleting Versioned Objects

If an object's latest version is a delete marker, then the server treats the object as if it didn't exist (i.e., it doesn't appear when listing objects, cannot be downloaded, etc.). However, all of the previous versions of the object (including one that existed just before the delete marker was created) still exist; they can be listed using ListVersions, and explicitly interacted with by setting VersionId and calling an appropriate method.

To permanently delete objects in a versioning-enabled bucket, each version of the object must be explicitly deleted by setting VersionId before calling this method. This includes any delete marker versions, which can be deleted like any other version.

Refer to Amazon's Deleting Object Versions, Working with Delete Markers, and Removing Delete Markers articles for more information.

DisableVersioning Method (Wasabi Class)

Disables versioning for the currently selected bucket.

Syntax

public void disableVersioning();

Remarks

This method can be used to disable versioning for the bucket currently selected by Bucket.

Refer to Amazon's Versioning documentation for more information about versioning.

DoEvents Method (Wasabi Class)

This method processes events from the internal message queue.

Syntax

public void doEvents();

Remarks

When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

EnableVersioning Method (Wasabi Class)

Enables versioning for the currently selected bucket.

Syntax

public void enableVersioning();

Remarks

This method can be used to enable versioning for the bucket currently selected by Bucket.

Refer to Amazon's Versioning documentation for more information about versioning.

GetBucketLocation Method (Wasabi Class)

Gets a bucket's location.

Syntax

public String getBucketLocation();

Remarks

This method retrieves and returns the location (i.e., region) of the bucket currently selected by Bucket.

GetCompliance Method (Wasabi Class)

Gets the compliance settings for the current bucket or an object in it.

Syntax

public void getCompliance(String objectName);

Remarks

Calling this method and passing the empty string for ObjectName will cause BucketCompliance to be populated for the current bucket. Otherwise, this method will cause ObjectCompliance to be populated for the object with the given ObjectName (as long as such an object exists in the current bucket, and the bucket's compliance settings are enabled).

Refer to the UpdateCompliance documentation for more information about compliance.

GetLink Method (Wasabi Class)

Creates a link that provides access to an object for a specified amount of time.

Syntax

public String getLink(String objectName, int expires);

Remarks

This method creates and returns a pre-authenticated link that provides access to the object specified by ObjectName in the bucket currently selected by Bucket. If the VersionId property is non-empty, a link is created for the specified version of the object.

The Expires parameter specifies how many seconds the link should be valid for. The maximum validity period is seven days.

Note that this method is an offline method that simply generates a pre-signed URL; no communication with the server takes place.

GetObject Method (Wasabi Class)

Downloads an object.

Syntax

public void getObject(String objectName);

Remarks

This methods downloads the object specified by ObjectName in the bucket currently selected by Bucket. If the VersionId property is non-empty, the specified version of the object is downloaded instead. The Range property can be used to download a specific range of bytes from the object.

If a stream has been specified using SetDownloadStream, the object data will be sent through it. If a stream is not specified, and LocalFile is set, the object data will be saved to the specified location; otherwise, the object data will be held by ObjectData.

To download and decrypt an encrypted object, set EncryptionAlgorithm and EncryptionPassword before calling this method.

Download Notes

In the simplest use-case, downloading an object looks like this: s3.LocalFile = "../MyData.zip"; s3.GetObject(s3.Objects[0].Name);

Resuming Downloads

The class also supports resuming failed downloads by using the StartByte property. If a download is interrupted, set StartByte to the appropriate offset before calling this method to resume the download. string downloadFile = "../MyData.zip"; s3.LocalFile = downloadFile; s3.GetObject(s3.Objects[0].Name); //The transfer is interrupted and GetObject() above fails. Later, resume the download: //Get the size of the partially downloaded file s3.StartByte = new FileInfo(downloadFile).Length; s3.GetObject(s3.Objects[0].Name);

Resuming Encrypted File Downloads

Resuming encrypted file downloads is only supported when LocalFile was set in the initial download attempt.

If LocalFile is set when beginning an encrypted download, the class creates a temporary file in TempPath to hold the encrypted data until the download is complete. If the download is interrupted, DownloadTempFile will be populated with the path of the temporary file that holds the partial data.

To resume, 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. s3.LocalFile = "../MyData.zip"; s3.EncryptionPassword = "password"; s3.GetObject(s3.Objects[0].Name); //The transfer is interrupted and GetObject() above fails. Later, resume the download: //Get the size of the partially downloaded temp file s3.StartByte = new FileInfo(s3.Config("DownloadTempFile")).Length; s3.GetObject(s3.Objects[0].Name);

GetObjectInfo Method (Wasabi Class)

Gets an object's information and metadata.

Syntax

public void getObjectInfo(String objectName);

Remarks

This method gets information and metadata for the object specified by Object in the bucket currently selected by Bucket. If the VersionId property is non-empty, information and metadata for the specified version of the object is retrieved instead.

Calling this method will fire the ObjectList and MetadataList events, and will re-populate the Objects and Metadata collection properties.

Interrupt Method (Wasabi Class)

This method interrupts the current method.

Syntax

public void interrupt();

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

ListBuckets Method (Wasabi Class)

Lists all buckets in the account.

Syntax

public void listBuckets();

Remarks

This method lists all buckets in the account.

Calling this method will fire the BucketList event once for each bucket, and will also populate the Buckets collection.

ListMultipartUploads Method (Wasabi Class)

Lists the current multipart uploads.

Syntax

public void listMultipartUploads();

Remarks

This method lists the current multipart uploads in the bucket currently selected by Bucket.

Before calling this method, the ObjectPrefix property may be set in order to restrict the results to only the multipart uploads whose names begin with a given string. The ObjectDelimiter property can also be used to further tune the results returned. The MaxObjects configuration setting may be used to limit the number of results returned.

Calling this method will fire the ObjectList event once for each multipart upload, and will also populate the Objects collection.

If there are still more multipart uploads available to list when this method returns, the ObjectMarker property will be populated. Continue to call this method until ObjectMarker is empty to accumulate all pages of results in the Objects collection. Alternatively, the AccumulatePages configuration setting can be disabled to clear the Objects collection every time a page of results is returned.

ListObjects Method (Wasabi Class)

Lists the objects in a bucket.

Syntax

public void listObjects();

Remarks

This method lists the objects in the bucket currently selected by Bucket.

Before calling this method, the ObjectPrefix property may be set in order to restrict the results to only the objects whose names begin with a given string. The ObjectDelimiter property can also be used to further tune the results returned. The MaxObjects configuration setting may be used to limit the number of results returned.

Calling this method will fire the ObjectList event once for each object, and will also populate the Objects collection. It may also fire the PrefixList event, and populate the PrefixCount and Prefix[i] configuration settings, depending on how the properties discussed above are set.

If there are still more objects available to list when this method returns, the ObjectMarker property will be populated. Continue to call this method until ObjectMarker is empty to accumulate all pages of results in the Objects collection. Alternatively, the AccumulatePages configuration setting can be disabled to clear the Objects collection every time a page of results is returned.

Object Hierarchy Traversal

By using the ObjectDelimiter and ObjectPrefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of objects (or object versions) as if it were a filesystem. For example, assume that objects with the following names exist within a bucket:

• MyCompany/
• MyCompany/Department1/
• MyCompany/Department2/
• MyCompany/Department2/EmployeeA
• MyCompany/Department2/EmployeeB

With ObjectDelimiter set to /, we can set ObjectPrefix to successively "deeper" values before calling ListObjects or ListVersions for the following effect:

ListParts Method (Wasabi Class)

Lists the parts in a multipart upload.

Syntax

public void listParts(String objectName, String uploadId);

Remarks

This method lists the parts in the multipart upload of ObjectName specified by UploadId. The MaxParts configuration setting may be used to limit the number of results returned.

Calling this method will fire the PartList event once for each part, and will also populate the Parts collection.

If there are still more parts available to list when this method returns, the PartMarker property will be populated. Continue to call this method until PartMarker is empty to accumulate all pages of results in the Parts collection. Alternatively, the AccumulatePages configuration setting can be disabled to clear the Parts collection every time a page of results is returned.

Note that this method does not need to be called before attempting to complete a multipart upload with CompleteMultipartUpload; the class will automatically collect the necessary information internally. Refer to CompleteMultipartUpload for more information.

ListVersions Method (Wasabi Class)

Lists the object versions in a bucket.

Syntax

public void listVersions();

Remarks

This method lists the object versions in the bucket currently selected by Bucket.

Before calling this method, the ObjectPrefix property may be set in order to restrict the results to only the object versions whose names begin with a given string. The ObjectDelimiter property can also be used to further tune the results returned. The MaxObjects configuration setting may be used to limit the number of results returned.

Calling this method will fire the ObjectList event once for each object version, and will also populate the Objects collection. It may also fire the PrefixList event, and populate the PrefixCount and Prefix[i] configuration settings, depending on how the properties discussed above are set.

If there are still more object versions available to list when this method returns, the VersionMarker property will be populated. Continue to call this method until VersionMarker is empty to accumulate all pages of results in the Objects collection. Alternatively, the AccumulatePages configuration setting can be disabled to clear the Objects collection every time a page of results is returned.

Object Hierarchy Traversal

By using the ObjectDelimiter and ObjectPrefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of objects (or object versions) as if it were a filesystem. For example, assume that objects with the following names exist within a bucket:

• MyCompany/
• MyCompany/Department1/
• MyCompany/Department2/
• MyCompany/Department2/EmployeeA
• MyCompany/Department2/EmployeeB

With ObjectDelimiter set to /, we can set ObjectPrefix to successively "deeper" values before calling ListObjects or ListVersions for the following effect:

RenameBucket Method (Wasabi Class)

Renames a bucket.

Syntax

public void renameBucket(String bucketName, String newName);

Remarks

This method renames the bucket named BucketName to the name NewName. NewName cannot already be in use by another bucket.

RenameFolder Method (Wasabi Class)

Renames a folder.

Syntax

public void renameFolder(String folderName, String newName);

Remarks

This method renames the folder named FolderName to the name NewName. If NewName is already in use by existing folders, it will be overwritten if the current bucket has versioning enabled, or if the OverwriteOnRename configuration setting is set to true (default).

Since "folders" are in fact just name prefixes formatted to mimic a traditional file system, this method can rename multiple levels of "folders" at once by renaming a prefix. For example, assume you have the following objects in a bucket:

• /pictures/animals/cats/cat1.jpg
• /pictures/animals/cats/cat2.jpg
• /pictures/animals/cats/cat3.jpg
• /pictures/animals/cats/cat4.jpg
• /pictures/animals/dogs/dog4.jpg
• /pictures/animals/dogs/dog5.jpg

Doing the following command would leave you with the following objects in the bucket:

wasabi.RenameFolder("/pictures/animals/cats/", "pictures/pets/dogs");

• /pictures/pets/dogs/cat1.jpg
• /pictures/pets/dogs/cat2.jpg
• /pictures/pets/dogs/cat3.jpg
• /pictures/pets/dogs/cat4.jpg
• /pictures/pets/dogs/dog4.jpg
• /pictures/pets/dogs/dog5.jpg

And doing this command instead would leave you with these objects in the bucket, since the prefix being renamed now includes part of the "filename", and since (by default) the original "dog4.jpg" will get overwritten when "cat4.jpg" is renamed:

wasabi.RenameFolder("/pictures/animals/cats/cat", "pictures/pets/dogs/dog");

• /pictures/pets/dogs/dog1.jpg
• /pictures/pets/dogs/dog2.jpg
• /pictures/pets/dogs/dog3.jpg
• /pictures/pets/dogs/dog4.jpg
• /pictures/pets/dogs/dog5.jpg

RenameObject Method (Wasabi Class)

Renames an object.

Syntax

public void renameObject(String objectName, String newName);

Remarks

This method renames the object named ObjectName to the name NewName. If NewName is already in use by an existing object, it will be overwritten if the current bucket has versioning enabled, or if the OverwriteOnRename configuration setting is set to true (default).

Reset Method (Wasabi Class)

Resets the class to its initial state.

Syntax

public void reset();

Remarks

This method resets the class to its initial state.

ResetHeaders Method (Wasabi Class)

Resets all HTTP headers, cookies, and LocalFile.

Syntax

public void resetHeaders();

Remarks

Resets all the HTTP headers as well as LocalFile to "" (empty string), and clears the Metadata and QueryParams collection properties.

Call this method before creating a new request, so that headers and query parameters from the previous request are not carried over to the next one.

SendCustomRequest Method (Wasabi Class)

Sends a custom request to the server.

Syntax

public void sendCustomRequest(String httpMethod, String objectName, String requestBody);

Remarks

This method can be used to send arbitrary requests to the server.

Valid values for HttpMethod are:

• GET (default if empty)
• HEAD
• POST
• PUT
• DELETE

The ObjectName and RequestBody parameters may be empty if not needed.

Usage

When this method is called, the class does the following:

1. Builds a request URL, including query parameters, based on the following:
   • UseSSL, Region, and UseVirtualHosting for the base URL.
     • Alternatively, if a custom URL has been specified using the URL configuration setting, it is used directly, and these properties are ignored.
   • Bucket (if non-empty)
   • ObjectName (if non-empty)
   • VersionId (if both it and ObjectName are non-empty)
   • QueryParams
2. Adds request headers from:
   • ContentDisposition
   • ContentType
   • OtherHeaders
   • ProductToken
   • SessionToken
   • UserToken
3. Signs the request (unless the SignCustomRequest configuration setting is disabled).
4. Sends the request, including RequestBody if non-empty.
5. Stores the response headers in the ParsedHeaders collection; and the response body in the stream specified using SetDownloadStream, the specified LocalFile, or ObjectData (using the same logic as GetObject).

If the response body is XML data, the XPath, XText, and other X* configuration settings can then be used to navigate and extract information from it.

SetDownloadStream Method (Wasabi Class)

Sets the stream to which downloaded data will be written.

Syntax

public void setDownloadStream(java.io.OutputStream downloadStream);

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 to be cleared. Similarly, setting LocalFile to a non-empty value will discard any stream set using this method.

SetUploadStream Method (Wasabi Class)

Sets the stream from which data is read when uploading.

Syntax

public void setUploadStream(java.io.InputStream uploadStream);

Remarks

If an upload stream is set before data is uploaded, the content of the stream will be read by the class 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 to be cleared. Similarly, setting LocalFile to a non-empty value will discard any stream set using this method.

StartMultipartUpload Method (Wasabi Class)

Starts a new manual multipart upload.

Syntax

public String startMultipartUpload(String objectName);

Remarks

This method starts a new "manual" multipart upload for an object named ObjectName, in the bucket currently selected by Bucket, and returns the upload Id that the server associates with it. For an "automatic" multipart upload see the CreateObject method. This upload Id can then be used to call the following methods:

• UploadPart
• CopyPart
• ListParts
• CompleteMultipartUpload
• AbortMultipartUpload

If there are any metadata items present in the Metadata collection, they will be included in the creation request, and will be applied to the final object after the multipart upload is completed with CompleteMultipartUpload.

Multipart uploads never expire, they must be explicitly completed or aborted using CompleteMultipartUpload or AbortMultipartUpload. The ListMultipartUploads method can be used to retrieve a list of current multipart uploads.

UpdateBucketACL Method (Wasabi Class)

Updates a bucket's canned access policy.

Syntax

public void updateBucketACL();

Remarks

This method updates the canned access policy of the bucket selected by Bucket to the value specified by AccessPolicy

UpdateCompliance Method (Wasabi Class)

Updates the compliance settings for the current bucket or an object in it.

Syntax

public void updateCompliance(String objectName);

Remarks

Calling this method and passing the empty string for ObjectName will cause the compliance settings stored in BucketCompliance to be applied to the current bucket. Otherwise, this method will cause the compliance settings stored in ObjectCompliance to be applied to the object with the given ObjectName (as long as such an object exists in the current bucket, and the bucket's compliance settings are enabled).

Compliance Notes

Compliance is a Wasabi feature that prevents objects from being modified or deleted before a specified time. The following tables and examples show what compliance settings are available at the bucket- and object-levels, what they do, and how they are used. Be sure to review the documentation for each of the individual settings for more information about them.

Bucket Compliance Settings

Compliance starts at the bucket level, it must be turned on for a bucket in order for the objects within that bucket to be under compliance. The class makes this easy to do: wasabi.Bucket = "MyBucket"; wasabi.BucketCompliance = new WasabiBucketCompliance("enabled", "", 10, "true", ""); wasabi.UpdateCompliance(""); This code turns on compliance settings for the bucket called "MyBucket", setting them so that objects are placed under conditional hold, and must be retained for 10 days after the conditional hold is released. The LockTime and DeleteAfterRetention settings are left alone, so they will default to "off" and "false" (respectively).

Important: Locking the compliance settings on a bucket using the LockTime setting is a one-way action. You cannot unlock a bucket's compliance settings without contacting the Wasabi support team. Refer to the Wasabi documentation for more information.

Object Compliance Settings

When an object's bucket has compliance enabled, all objects in that bucket are under compliance, and you can query any object's compliance settings using the GetCompliance method.

Any individual object can have its compliance settings updated as well. The LegalHold setting can be toggled to prevent (or allow) deletion; the object's ConditionalHold, if "true", can be released by setting to "false", at which time the object will begin its retention period. The object's RetentionTime can also be extended (but not reduced). For example, if you wanted to release an object from conditional hold: wasabi.Bucket = "MyBucket"; wasabi.ObjectCompliance = new WasabiObjectCompliance("", "false", ""); wasabi.UpdateCompliance("MyObject");

Further Information

Compliance is a powerful tool, but it must be handled carefully. These notes, and the documentation for the compliance-related properties, methods, and types, do not supersede Wasabi's documentation, and reviewing that documentation is highly recommended to gain a full understanding of how compliance works.

UpdateObjectACL Method (Wasabi Class)

Updates an object's canned access policy.

Syntax

public void updateObjectACL(String objectName);

Remarks

This method updates the caned access policy of the objects specified by ObjectName, in the bucket currently selected by Bucket, to the value specified by AccessPolicy.

If the VersionId property is non-empty, the canned access policy of the specified version of the object is updated instead.

UploadPart Method (Wasabi Class)

Uploads a multipart upload part.

Syntax

public void uploadPart(String objectName, int partNumber, String uploadId);

Remarks

This method uploads a part for the multipart upload of the object named ObjectName specified by UploadId.

PartNumber specifies the part's number; it must be a value in the range 1 to 10000, inclusive. If a part with the given number already exists in the specified multipart upload, it is replaced with the newly-uploaded part.

The data to upload is taken from either the stream set using SetUploadStream, LocalFile, or ObjectData (whichever data is found in first, when checked in that order). Each part must be at least 5MB in size, except for the last part in the overall multipart upload, which can be any non-zero size.

If the IncludePartMD5 configuration setting is true, the class will include an MD5 digest of its data when sending it to the server. The server will then verify that the data was received without corruption.

BucketList Event (Wasabi Class)

Fires once for each bucket returned when listing buckets.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void bucketList(WasabiBucketListEvent e) {}
  ...
}

public class WasabiBucketListEvent {
  public String bucketName;
  public String creationDate;
  public String ownerId;
  public String ownerName;
}

Remarks

This event fires once for each bucket returned when ListBuckets is called.

BucketName reflects the name of the bucket.

CreationDate reflects the bucket's creation date.

OwnerId and OwnerName reflect the Id and display name of the bucket's owner, respectively.

EndTransfer Event (Wasabi Class)

This event fires when a document finishes transferring.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void endTransfer(WasabiEndTransferEvent e) {}
  ...
}

public class WasabiEndTransferEvent {
  public int direction;
}

Remarks

The EndTransfer event is fired 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 (Wasabi Class)

Fired when information is available about errors during data delivery.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void error(WasabiErrorEvent e) {}
  ...
}

public class WasabiErrorEvent {
  public int errorCode;
  public String description;
}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class 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 section.

FragmentComplete Event (Wasabi Class)

Fires after each part in an automatic multipart upload is complete.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void fragmentComplete(WasabiFragmentCompleteEvent e) {}
  ...
}

public class WasabiFragmentCompleteEvent {
  public int fragmentNumber;
  public int fragmentCount;
  public boolean interrupt; //read-write
}

Remarks

If, when CreateObject is called, more than SimpleUploadLimit bytes of upload data are present, the class 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 CreateObject for more information.

Header Event (Wasabi Class)

Fired every time a header line comes in.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void header(WasabiHeaderEvent e) {}
  ...
}

public class WasabiHeaderEvent {
  public String field;
  public String value;
}

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 (Wasabi Class)

Fired once for each log message.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void log(WasabiLogEvent e) {}
  ...
}

public class WasabiLogEvent {
  public int logLevel;
  public String message;
  public String logType;
}

Remarks

This event is fired once for each log message generated by the class. The verbosity is controlled by the LogLevel setting.

LogLevel indicates the level of message. Possible values are as follows:

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 (Wasabi Class)

Fires once for each metadata item returned when object information and metadata is retrieved.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void metadataList(WasabiMetadataListEvent e) {}
  ...
}

public class WasabiMetadataListEvent {
  public String name;
  public String value;
}

Remarks

This event fires once for each metadata item returned when GetObjectInfo is called.

Name is the name of the metadata item, without the service-specific prefix (e.g., x-amz-meta-, x-goog-meta-, etc.). Keep in mind that the server stores metadata names in lowercase.

Value is the metadata item's value.

ObjectList Event (Wasabi Class)

Fires once for each object, object version, or multipart upload returned when listing such items.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void objectList(WasabiObjectListEvent e) {}
  ...
}

public class WasabiObjectListEvent {
  public String bucketName;
  public String objectName;
  public String lastModified;
  public long size;
  public String ETag;
  public String ownerId;
  public String ownerName;
  public String uploadId;
  public String versionId;
  public boolean latestVersion;
  public boolean deleted;
}

Remarks

This event fires once for each object, object version, or multipart upload returned when GetObjectInfo, ListObjects, ListVersions, or ListMultipartUploads is called.

BucketName reflects the name of the bucket that the object is in.

ObjectName reflects the name of the object.

LastModified reflects the last modified time of the object. Not applicable when ListMultipartUploads is called.

Size reflects the size, in bytes, of the object. Not applicable when ListMultipartUploads is called.

ETag reflects the object's ETag. Not applicable when ListMultipartUploads is called.

OwnerId and OwnerName reflect the Id and display name of the object's owner, respectively. Not applicable when GetObjectInfo is called.

UploadId reflects the Id of the multipart upload. Only applicable when ListMultipartUploads is called.

VersionId reflects the Id of the object version (note that the string null is a valid version Id). Only applicable when ListVersions is called, or when GetObjectInfo is called while VersionId is non-empty; empty in all other cases.

LatestVersion indicates whether this is the latest object version. Only applicable when ListVersions is called; true in all other cases.

Deleted indicates whether this object version is a delete marker (refer to DeleteObject for more information). Only applicable when ListVersions is called, or when GetObjectInfo is called while VersionId is non-empty; false in all other cases.

PartList Event (Wasabi Class)

Fires once for every part returned when listing a multipart upload's parts.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void partList(WasabiPartListEvent e) {}
  ...
}

public class WasabiPartListEvent {
  public int partNumber;
  public String objectName;
  public String lastModified;
  public long size;
  public String ETag;
  public String ownerId;
  public String ownerName;
}

Remarks

This event fires once for each multipart upload part returned when ListParts is called.

PartNumber reflects the part's number.

ObjectName reflects the name of the object the multipart upload is for.

LastModified reflects the last modified time of the part.

Size reflects the size, in bytes, of the part.

ETag reflects the part's ETag of the part.

OwnerId and OwnerName reflect the Id and display name of the part's owner, respectively.

PrefixList Event (Wasabi Class)

Fires once for each common prefix returned when listing objects.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void prefixList(WasabiPrefixListEvent e) {}
  ...
}

public class WasabiPrefixListEvent {
  public String bucketName;
  public String prefix;
}

Remarks

This event fires once for each common prefix returned when ListObjects or ListVersions is called when ObjectDelimiter is non-empty. Refer to ObjectDelimiter for more information.

BucketName reflects the name of the bucket that the prefix is in.

Prefix is the common prefix.

Progress Event (Wasabi Class)

Fires during an upload or download to indicate transfer progress.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void progress(WasabiProgressEvent e) {}
  ...
}

public class WasabiProgressEvent {
  public int direction;
  public long bytesTransferred;
  public long totalBytes;
  public int percentDone;
}

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 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 class 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 configuration setting, in which case the class 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 (Wasabi Class)

Fired after the server presents its certificate to the client.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void SSLServerAuthentication(WasabiSSLServerAuthenticationEvent e) {}
  ...
}

public class WasabiSSLServerAuthenticationEvent {
  public byte[] certEncoded;
  public String certSubject;
  public String certIssuer;
  public String status;
  public boolean accept; //read-write
}

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 (Wasabi Class)

Fired when secure connection progress messages are available.

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void SSLStatus(WasabiSSLStatusEvent e) {}
  ...
}

public class WasabiSSLStatusEvent {
  public String message;
}

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

StartTransfer Event (Wasabi Class)

This event fires when a document starts transferring (after the headers).

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void startTransfer(WasabiStartTransferEvent e) {}
  ...
}

public class WasabiStartTransferEvent {
  public int direction;
}

Remarks

The StartTransfer event is fired 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 (Wasabi Class)

Fired while a document transfers (delivers document).

Syntax

public class DefaultWasabiEventListener implements WasabiEventListener {
  ...
  public void transfer(WasabiTransferEvent e) {}
  ...
}

public class WasabiTransferEvent {
  public int direction;
  public long bytesTransferred;
  public int percentDone;
  public byte[] text;
}

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.

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.

Fields

Constructors

public Certificate();

public Certificate( certificateFile);

public Certificate( encoded);

public Certificate( storeType,  store,  storePassword,  subject);

public Certificate( storeType,  store,  storePassword,  subject,  configurationString);

public Certificate( storeType,  store,  storePassword,  encoded);

public Certificate( storeType,  store,  storePassword,  subject);

public Certificate( storeType,  store,  storePassword,  subject,  configurationString);

public Certificate( storeType,  store,  storePassword,  encoded);

Firewall Type

The firewall the class 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 and the FirewallType.

Fields

Constructors

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 type. This type contains a Field, and its corresponding Value.

Fields

Constructors

public Header();

public Header( field,  value);

Proxy Type

The proxy the class will connect to.

Remarks

When connecting through a proxy, this type is used to specify different properties of the proxy, such as the Server and the AuthScheme.

Fields

Constructors

public Proxy();

public Proxy( server,  port);

public Proxy( server,  port,  user,  password);

QueryParam Type

A query parameter to send in the request.

Remarks

This type represents a query parameter to send in the request.

Fields

Constructors

public QueryParam();

public QueryParam( name,  value);

S3Bucket Type

This type represents a bucket.

Remarks

This type represents a bucket.

Fields

Constructors

public S3Bucket();

public S3Bucket( name,  creationDate,  ownerId,  ownerDisplayName);

S3Metadata Type

This type represents Amazon's Simple Storage Service (S3) metadata item.

Remarks

This type represents an S3 metadata item.

Fields

Constructors

public S3Metadata();

public S3Metadata( name,  value);

S3Object Type

This type represents an object.

Remarks

This type represents an object.

Fields

Constructors

public S3Object();

public S3Object( name,  lastModified,  size,  storageClass,  ETag,  ownerId,  ownerDisplayName,  uploadId);

S3Part Type

This type represents a multipart upload part.

Remarks

This type represents a multipart upload part.

Fields

Constructors

public S3Part();

public S3Part( partNumber,  objectName,  lastModified,  size,  ETag,  ownerId,  ownerDisplayName);

WasabiBucketCompliance Type

Represents a bucket's compliance settings.

Remarks

This type is used to hold a bucket's compliance settings.

Refer to the UpdateCompliance documentation for more information about compliance.

Fields

Constructors

public WasabiBucketCompliance();

public WasabiBucketCompliance( status,  lockTime,  retentionDays,  conditionalHold,  deleteAfterRetention);

WasabiObjectCompliance Type

Represents an object's compliance settings.

Remarks

This type is used to hold an object's compliance settings.

Refer to the UpdateCompliance documentation for more information about compliance.

Fields

Constructors

public WasabiObjectCompliance();

public WasabiObjectCompliance( retentionTime,  conditionalHold,  legalHold);

Config Settings (Wasabi Class)

Wasabi Config Settings

<firstlevel>
  <one>value</one>
  <two>
    <item>first</item>
    <item>second</item>
  </two>
  <three>value three</three>
</firstlevel>

{
  "firstlevel": {
    "one": "value",
    "two": ["first", "second"],
    "three": "value three"
  }
}

HTTP Config Settings

TCPClient Config Settings

SSL Config Settings

-----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-----

-----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-----

-----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-----

Socket Config Settings

Base Config Settings

Trappable Errors (Wasabi Class)

Common Errors

Wasabi Errors

HTTP Errors

TCPClient Errors