Objects: rewrite

Rewrites a source object to a destination object. Optionally overrides metadata. Try it now.

The authenticated user must have sufficient permission to use this method.

This method copies data using multiple requests so large objects can be copied with a normal length timeout per request rather than one very long timeout for a single request.

Keep the following in mind when using the rewrite method:

• ACLs that you want to retain from the original object must be included in the object resource that you provide in the request body.
• If the source and destination are the same location and storage class and use the same server-side encryption (either the default server-side encryption, or the same customer-supplied encryption key), the rewrite method returns in a single RPC, that is, you do not need to use additional calls specifying a rewriteToken.There are no additional I/O charges. If the source and destination are different locations or storage classes, or if they are encrypted differently, the rewrite method might require multiple calls and there will be I/O charges (see pricing).
• When you rewrite a composite object where the source and destination are different locations and/or storage classes, the result will be a composite object containing a single component (and, as always with composite objects, it will have only a crc32c checksum, not an MD5).
• You must complete rewrite operations within 1 week of when the rewriteToken was created. Attempts to use the token after it has expired fail with a 410 error.

To rewrite objects encrypted by a customer-supplied encryption key, use the headers listed on the Encryption page in your request.

Request

HTTP request

POST https://www.googleapis.com/storage/v1/b/sourceBucket/o/sourceObject/rewriteTo/b/destinationBucket/o/destinationObject

Parameters

Parameter name	Value	Description
Path parameters
destinationBucket	string	Name of the bucket in which to store the new object. Overrides the provided object metadata's bucket value, if any.
destinationObject	string	Name of the new object. Required when the object metadata is not otherwise provided. Overrides the object metadata's name value, if any. For information about how to URL encode object names to be path safe, see Encoding URI Path Parts.
sourceBucket	string	Name of the bucket in which to find the source object.
sourceObject	string	Name of the source object. For information about how to URL encode object names to be path safe, see Encoding URI Path Parts.
Optional query parameters
destinationKmsKeyName	string	Resource name of the Cloud KMS key that will be used to encrypt the object. Overrides the object metadata's kms_key_name value, if any. The Cloud KMS key must be located in same location as the object.
destinationPredefinedAcl	string	Apply a predefined set of access controls to the destination object. Acceptable values are: "authenticatedRead": Object owner gets OWNER access, and allAuthenticatedUsers get READER access. "bucketOwnerFullControl": Object owner gets OWNER access, and project team owners get OWNER access. "bucketOwnerRead": Object owner gets OWNER access, and project team owners get READER access. "private": Object owner gets OWNER access. "projectPrivate": Object owner gets OWNER access, and project team members get access according to their roles. "publicRead": Object owner gets OWNER access, and allUsers get READER access.
ifGenerationMatch	long	Makes the operation conditional on whether the destination object's current generation matches the given value. Setting to 0 makes the operation succeed only if there are no live versions of the object.
ifGenerationNotMatch	long	Makes the operation conditional on whether the destination object's current generation does not match the given value. If no live object exists, the precondition fails. Setting to 0 makes the operation succeed only if there is a live version of the object.
ifMetagenerationMatch	long	Makes the operation conditional on whether the destination object's current metageneration matches the given value.
ifMetagenerationNotMatch	long	Makes the operation conditional on whether the destination object's current metageneration does not match the given value.
ifSourceGenerationMatch	long	Makes the operation conditional on whether the source object's generation matches the given value.
ifSourceGenerationNotMatch	long	Makes the operation conditional on whether the source object's generation does not match the given value.
ifSourceMetagenerationMatch	long	Makes the operation conditional on whether the source object's current metageneration matches the given value.
ifSourceMetagenerationNotMatch	long	Makes the operation conditional on whether the source object's current metageneration does not match the given value.
maxBytesRewrittenPerCall	long	The maximum number of bytes that will be rewritten per rewrite request. Most callers shouldn't need to specify this parameter - it is primarily in place to support testing. If specified the value must be an integral multiple of 1 MiB (1048576). Also, this only applies to requests where the source and destination span locations and/or storage classes. Finally, this value must not change across rewrite calls else you'll get an error that the rewriteToken is invalid.
projection	string	Set of properties to return. Defaults to noAcl, unless the object resource specifies the acl property, when it defaults to full. Acceptable values are: "full": Include all properties. "noAcl": Omit the owner, acl property.
rewriteToken	string	Include this field (from the previous rewrite response) on each rewrite request after the first one, until the rewrite response 'done' flag is true. Calls that provide a rewriteToken can omit all other request fields, but if included those fields must match the values provided in the first rewrite request.
sourceGeneration	long	If present, selects a specific revision of the source object (as opposed to the latest version, the default).
userProject	string	The project to be billed for this request. Required for Requester Pays buckets.

Request body

In the request body, optionally supply metadata to apply to the rewritten object using an object resource.

Response

If successful, this method returns a response body with the following structure:

{
  "kind": "storage#rewriteResponse",
  "totalBytesRewritten": unsigned long,
  "objectSize": unsigned long,
  "done": boolean,
  "rewriteToken": string,
  "resource": objects Resource
}

Property name	Value	Description	Notes
kind	string	The kind of item this is.
totalBytesRewritten	unsigned long	The total bytes written so far, which can be used to provide a waiting user with a progress indicator. This property is always present in the response.
objectSize	unsigned long	The total size of the object being copied in bytes. This property is always present in the response.
done	boolean	true if the copy is finished; otherwise, false if the copy is in progress. This property is always present in the response.
rewriteToken	string	A token to use in subsequent requests to continue copying data. This token is present in the response only when there is more data to copy.
resource	nested object	A resource containing the metadata for the copied-to object. This property is present in the response only when copying completes.

Try it!

Use the APIs Explorer below to call this method on live data and see the response.