copy method

Creates a copy of an object stored in Object Storage. Objects up to 5 GB in size can be copied with a single copy operation. If the object is greater than 5 GB, use the copyPart operation.

To specify the copy source, use the x-amz-copy-source header. The copy request must not pass any data other than headers.

Note

Object Storage does not lock an object for writing and can simultaneously accept multiple requests that copy objects to the same resulting object. After all the requests are completed, the resulting object is the one whose copy operation was run last.

The object metadata is copied along with the object. If necessary, you can change the metadata by explicitly setting the appropriate headers.

You can also use headers to:

  • Change an object's storage class.
  • Add conditions for copying an object.

The user must have permission to read the source object and write data to the resulting bucket.

Request

PUT /{bucket}/{key} HTTP/1.1

Path parameters

Parameter Description
bucket Name of the resulting bucket.
key Key of the resulting object. ID that the object is saved with in Object Storage.

Headers

Required headers are listed in the table below.

Header Description
x-amz-copy-source The name of the bucket and the key of the object to copy, separated by the / character.

For example, x-amz-copy-source: /source_bucket/sourceObject.

You should also use the necessary common request headers.

Use the headers from the table below if you need to change the default behavior of the copy method.

Header Description
x-amz-metadata-directive Metadata copy mode.

If the header value is COPY, the object metadata is copied and all the x-amz-meta-* headers are ignored. Default behavior of the copy method.

If the header value is REPLACE, the object metadata is replaced with the metadata specified in the request.

The x-amz-storage-class header is not copied; add it to the request if necessary.
x-amz-copy-source-if-match Object copying criteria.

If the ETag of an object is the same as in the header, the object is copied.

If the criteria isn't met, Object Storage returns a 412 error.

Can be used with the x-amz-copy-source-if-unmodified-since header.
x-amz-copy-source-if-none-match Object copying criteria.

If the ETag of the object isn't the same as in the header, the object is copied.

If the criteria isn't met, Object Storage returns a 412 error.

Can be used with the x-amz-copy-source-if-modified-since method.
x-amz-copy-source-if-unmodified-since Object copying criteria.

The object is copied if it didn't change since the specified time.

If the criteria isn't met, Object Storage returns a 412 error.

Can be used with the x-amz-copy-source-if-match header.
x-amz-copy-source-if-modified-since Object copying criteria.

The object is copied if it changed since the specified time.

If the criteria isn't met, Object Storage returns a 412 error.

Can be used with the x-amz-copy-source-if-none-match header.
x-amz-storage-class Object storage class.

Possible values:
- STANDARD for uploading an object to standard storage.
- COLD, STANDARD_IA, and NEARLINE for uploading an object to cold storage.

If the header is omitted, the object is saved to the storage specified in the bucket settings.
x-amz-meta-* User-defined object metadata.

Object Storage considers all headers starting with x-amz-meta- as user-defined. It doesn't process these headers. Instead, it saves them in their original format.

The total size of user-defined headers must not exceed 2 KB. The size of user-defined data is determined as the length of the UTF-8 encoded string. Both request names and values are included in the size.

If x-amz-metadata-directive: COPY, such headers are ignored.

Response

Headers

A response may contain common response headers and the headers listed in the table below.

Header Description
x-amz-storage-class Object storage class.

Possible values:
- STANDARD for an object stored in standard storage.
- COLD for an object stored in cold storage.

Response codes

For the list of possible responses, see Responses.

Data schema

<CopyObjectResult>
   <LastModified>2019-02-15T14:32:00</LastModified>
   <ETag>"9bgh7535f2734ec974343yuc93985328"</ETag>
</CopyObjectResult>
Element Description
CopyObjectResult Contains response elements.

Path: /CopyObjectResult.
ETag ETag of the resulting object. Because metadata is not taken into account when calculating the ETag, the ETag of the source and resulting objects must match.

Path: /CopyObjectResult/ETag.
LastModified Date when the object was last modified.

Path: /CopyObjectResult/LastModified.