Object / Action / copy_from

copy_from#

S3.Object.copy_from(**kwargs)#

Creates a copy of an object that is already stored in Amazon S3.

Note

You can store individual objects of up to 5 TB in Amazon S3. You create a copy of your object up to 5 GB in size in a single atomic action using this API. However, to copy an object greater than 5 GB, you must use the multipart upload Upload Part - Copy (UploadPartCopy) API. For more information, see Copy Object Using the REST Multipart Upload API.

All copy requests must be authenticated. Additionally, you must have read access to the source object and write access to the destination bucket. For more information, see REST Authentication. Both the Region that you want to copy the object from and the Region that you want to copy the object to must be enabled for your account.

A copy request might return an error when Amazon S3 receives the copy request or while Amazon S3 is copying the files. If the error occurs before the copy action starts, you receive a standard Amazon S3 error. If the error occurs during the copy operation, the error response is embedded in the 200 OK response. This means that a 200 OK response can contain either a success or an error. Design your application to parse the contents of the response and handle it appropriately.

If the copy is successful, you receive a response with information about the copied object.

Note

If the request is an HTTP 1.1 request, the response is chunk encoded. If it were not, it would not contain the content-length, and you would need to read the entire body.

The copy request charge is based on the storage class and Region that you specify for the destination object. For pricing information, see Amazon S3 pricing.

Warning

Amazon S3 transfer acceleration does not support cross-Region copies. If you request a cross-Region copy using a transfer acceleration endpoint, you get a 400 Bad Request error. For more information, see Transfer Acceleration.

Metadata

When copying an object, you can preserve all metadata (default) or specify new metadata. However, the ACL is not preserved and is set to private for the user making the request. To override the default ACL setting, specify a new ACL when generating a copy request. For more information, see Using ACLs.

To specify whether you want the object metadata copied from the source object or replaced with metadata provided in the request, you can optionally add the x-amz-metadata-directive header. When you grant permissions, you can use the s3:x-amz-metadata-directive condition key to enforce certain metadata behavior when objects are uploaded. For more information, see Specifying Conditions in a Policy in the Amazon S3 User Guide. For a complete list of Amazon S3-specific condition keys, see Actions, Resources, and Condition Keys for Amazon S3.

x-amz-copy-source-if Headers

To only copy an object under certain conditions, such as whether the Etag matches or whether the object was modified before or after a specified date, use the following request parameters:

  • x-amz-copy-source-if-match

  • x-amz-copy-source-if-none-match

  • x-amz-copy-source-if-unmodified-since

  • x-amz-copy-source-if-modified-since

If both the x-amz-copy-source-if-match and x-amz-copy-source-if-unmodified-since headers are present in the request and evaluate as follows, Amazon S3 returns 200 OK and copies the data:

  • x-amz-copy-source-if-match condition evaluates to true

  • x-amz-copy-source-if-unmodified-since condition evaluates to false

If both the x-amz-copy-source-if-none-match and x-amz-copy-source-if-modified-since headers are present in the request and evaluate as follows, Amazon S3 returns the 412 Precondition Failed response code:

  • x-amz-copy-source-if-none-match condition evaluates to false

  • x-amz-copy-source-if-modified-since condition evaluates to true

Note

All headers with the x-amz- prefix, including x-amz-copy-source, must be signed.

Server-side encryption

When you perform a CopyObject operation, you can optionally use the appropriate encryption-related headers to encrypt the object using server-side encryption with Amazon Web Services managed encryption keys (SSE-S3 or SSE-KMS) or a customer-provided encryption key. With server-side encryption, Amazon S3 encrypts your data as it writes it to disks in its data centers and decrypts the data when you access it. For more information about server-side encryption, see Using Server-Side Encryption.

If a target object uses SSE-KMS, you can enable an S3 Bucket Key for the object. For more information, see Amazon S3 Bucket Keys in the Amazon S3 User Guide.

Access Control List (ACL)-Specific Request Headers

When copying an object, you can optionally use headers to grant ACL-based permissions. By default, all objects are private. Only the owner has full access control. When adding a new object, you can grant permissions to individual Amazon Web Services accounts or to predefined groups defined by Amazon S3. These permissions are then added to the ACL on the object. For more information, see Access Control List (ACL) Overview and Managing ACLs Using the REST API.

If the bucket that you’re copying objects to uses the bucket owner enforced setting for S3 Object Ownership, ACLs are disabled and no longer affect permissions. Buckets that use this setting only accept PUT requests that don’t specify an ACL or PUT requests that specify bucket owner full control ACLs, such as the bucket-owner-full-control canned ACL or an equivalent form of this ACL expressed in the XML format.

For more information, see Controlling ownership of objects and disabling ACLs in the Amazon S3 User Guide.

Note

If your bucket uses the bucket owner enforced setting for Object Ownership, all objects written to the bucket by any account will be owned by the bucket owner.

Checksums

When copying an object, if it has a checksum, that checksum will be copied to the new object by default. When you copy the object over, you may optionally specify a different checksum algorithm to use with the x-amz-checksum-algorithm header.

Storage Class Options

You can use the CopyObject action to change the storage class of an object that is already stored in Amazon S3 using the StorageClass parameter. For more information, see Storage Classes in the Amazon S3 User Guide.

Versioning

By default, x-amz-copy-source identifies the current version of an object to copy. If the current version is a delete marker, Amazon S3 behaves as if the object was deleted. To copy a different version, use the versionId subresource.

If you enable versioning on the target bucket, Amazon S3 generates a unique version ID for the object being copied. This version ID is different from the version ID of the source object. Amazon S3 returns the version ID of the copied object in the x-amz-version-id response header in the response.

If you do not enable versioning or suspend it on the target bucket, the version ID that Amazon S3 generates is always null.

If the source object’s storage class is GLACIER, you must restore a copy of this object before you can use it as a source object for the copy operation. For more information, see RestoreObject.

The following operations are related to CopyObject:

For more information, see Copying Objects.

See also: AWS API Documentation

Request Syntax

response = object.copy_from(
    ACL='private'|'public-read'|'public-read-write'|'authenticated-read'|'aws-exec-read'|'bucket-owner-read'|'bucket-owner-full-control',
    CacheControl='string',
    ContentDisposition='string',
    ContentEncoding='string',
    ContentLanguage='string',
    ContentType='string',
    CopySource='string' or {'Bucket': 'string', 'Key': 'string', 'VersionId': 'string'},
    CopySourceIfMatch='string',
    CopySourceIfModifiedSince=datetime(2015, 1, 1),
    CopySourceIfNoneMatch='string',
    CopySourceIfUnmodifiedSince=datetime(2015, 1, 1),
    Expires=datetime(2015, 1, 1),
    GrantFullControl='string',
    GrantRead='string',
    GrantReadACP='string',
    GrantWriteACP='string',
    Metadata={
        'string': 'string'
    },
    MetadataDirective='COPY'|'REPLACE',
    TaggingDirective='COPY'|'REPLACE',
    RetentionDirective='COPY'|'REPLACE',
    RetentionExpirationDate=datetime(2015, 1, 1),
    RetentionLegalHoldId='string',
    RetentionPeriod=123,
    ServerSideEncryption='AES256',
    StorageClass='ACCELERATED'|'STANDARD'|'REDUCED_REDUNDANCY'|'STANDARD_IA'|'ONEZONE_IA'|'INTELLIGENT_TIERING'|'GLACIER'|'DEEP_ARCHIVE'|'OUTPOSTS'|'GLACIER_IR',
    WebsiteRedirectLocation='string',
    SSECustomerAlgorithm='string',
    SSECustomerKey='string',
    SSEKMSKeyId='string',
    CopySourceSSECustomerAlgorithm='string',
    CopySourceSSECustomerKey='string',
    RequestPayer='requester',
    Tagging='string',
    ObjectLockMode='GOVERNANCE'|'COMPLIANCE',
    ObjectLockRetainUntilDate=datetime(2015, 1, 1),
    ObjectLockLegalHoldStatus='ON'|'OFF',
    ExpectedBucketOwner='string',
    ExpectedSourceBucketOwner='string'
)
Parameters:

  • ACL (string) –

    The canned access control list (ACL) to apply to the object.

    When you copy an object, the ACL metadata is not preserved and is set to private by default. Only the owner has full access control. To override the default ACL setting, specify a new ACL when you generate a copy request. For more information, see Using ACLs.

    If the destination bucket that you’re copying objects to uses the bucket owner enforced setting for S3 Object Ownership, ACLs are disabled and no longer affect permissions. Buckets that use this setting only accept PUT requests that don’t specify an ACL or PUT requests that specify bucket owner full control ACLs, such as the bucket-owner-full-control canned ACL or an equivalent form of this ACL expressed in the XML format. For more information, see Controlling ownership of objects and disabling ACLs in the Amazon S3 User Guide.

    Note

    • If your destination bucket uses the bucket owner enforced setting for Object Ownership, all objects written to the bucket by any account will be owned by the bucket owner.

    • This functionality is not supported for directory buckets.

    • This functionality is not supported for Amazon S3 on Outposts.

  • CacheControl (string) – Specifies the caching behavior along the request/reply chain.

  • ContentDisposition (string) – Specifies presentational information for the object. Indicates whether an object should be displayed in a web browser or downloaded as a file. It allows specifying the desired filename for the downloaded file.

  • ContentEncoding (string) – Specifies what content encodings have been applied to the object and thus what decoding mechanisms must be applied to obtain the media-type referenced by the Content-Type header field.

  • ContentLanguage (string) – The language the content is in.

  • ContentType (string) – A standard MIME type that describes the format of the object data.

  • CopySource (str or dict) – [REQUIRED] The name of the source bucket, key name of the source object, and optional version ID of the source object. You can either provide this value as a string or a dictionary. The string form is {bucket}/{key} or {bucket}/{key}?versionId={versionId} if you want to copy a specific version. You can also provide this value as a dictionary. The dictionary format is recommended over the string format because it is more explicit. The dictionary format is: {‘Bucket’: ‘bucket’, ‘Key’: ‘key’, ‘VersionId’: ‘id’}. Note that the VersionId key is optional and may be omitted. To specify an S3 access point, provide the access point ARN for the Bucket key in the copy source dictionary. If you want to provide the copy source for an S3 access point as a string instead of a dictionary, the ARN provided must be the full S3 access point object ARN (i.e. {accesspoint_arn}/object/{key})

  • CopySourceIfMatch (string) –

    Copies the object if its entity tag (ETag) matches the specified tag.

    If both the x-amz-copy-source-if-match and x-amz-copy-source-if-unmodified-since headers are present in the request and evaluate as follows, Amazon S3 returns 200 OK and copies the data:

    • x-amz-copy-source-if-match condition evaluates to true

    • x-amz-copy-source-if-unmodified-since condition evaluates to false

  • CopySourceIfModifiedSince (datetime) –

    Copies the object if it has been modified since the specified time.

    If both the x-amz-copy-source-if-none-match and x-amz-copy-source-if-modified-since headers are present in the request and evaluate as follows, Amazon S3 returns the 412 Precondition Failed response code:

    • x-amz-copy-source-if-none-match condition evaluates to false

    • x-amz-copy-source-if-modified-since condition evaluates to true

  • CopySourceIfNoneMatch (string) –

    Copies the object if its entity tag (ETag) is different than the specified ETag.

    If both the x-amz-copy-source-if-none-match and x-amz-copy-source-if-modified-since headers are present in the request and evaluate as follows, Amazon S3 returns the 412 Precondition Failed response code:

    • x-amz-copy-source-if-none-match condition evaluates to false

    • x-amz-copy-source-if-modified-since condition evaluates to true

  • CopySourceIfUnmodifiedSince (datetime) –

    Copies the object if it hasn’t been modified since the specified time.

    If both the x-amz-copy-source-if-match and x-amz-copy-source-if-unmodified-since headers are present in the request and evaluate as follows, Amazon S3 returns 200 OK and copies the data:

    • x-amz-copy-source-if-match condition evaluates to true

    • x-amz-copy-source-if-unmodified-since condition evaluates to false

  • Expires (datetime) – The date and time at which the object is no longer cacheable.

  • GrantFullControl (string) –

    Gives the grantee READ, READ_ACP, and WRITE_ACP permissions on the object.

    This action is not supported by Amazon S3 on Outposts.

  • GrantRead (string) –

    Allows grantee to read the object data and its metadata.

    This action is not supported by Amazon S3 on Outposts.

  • GrantReadACP (string) –

    Allows grantee to read the object ACL.

    This action is not supported by Amazon S3 on Outposts.

  • GrantWriteACP (string) –

    Allows grantee to write the ACL for the applicable object.

    This action is not supported by Amazon S3 on Outposts.

  • Metadata (dict) –

    A map of metadata to store with the object in S3.

    • (string) –

      • (string) –

  • MetadataDirective (string) –

    Specifies whether the metadata is copied from the source object or replaced with metadata that’s provided in the request. When copying an object, you can preserve all metadata (the default) or specify new metadata. If this header isn’t specified, COPY is the default behavior.

    General purpose bucket - For general purpose buckets, when you grant permissions, you can use the s3:x-amz-metadata-directive condition key to enforce certain metadata behavior when objects are uploaded. For more information, see Amazon S3 condition key examples in the Amazon S3 User Guide.

    Note

    x-amz-website-redirect-location is unique to each object and is not copied when using the x-amz-metadata-directive header. To copy the value, you must specify x-amz-website-redirect-location in the request header.

  • TaggingDirective (string) – Specifies whether the object tag-set are copied from the source object or replaced with tag-set provided in the request.

  • RetentionDirective (string) – This header controls how the Protection state of the source object is copied to the destination object.If copied, the retention period and all legal holds are copied onto the new object. The legal hold date’s is set to the date of the copy.

  • RetentionExpirationDate (datetime) – Date on which it will be legal to delete or modify the object. This field can only be specified if Retention-Directive is REPLACE. You can only specify this or the Retention-Period header. If both are specified a 400 error will be returned. If neither is specified the bucket’s DefaultRetention period will be used.

  • RetentionLegalHoldId (string) – A single legal hold to apply to the object. This field can only be specified if Retention-Directive is REPLACE. A legal hold is a character long string of max length 64. The object cannot be overwritten or deleted until all legal holds associated with the object are removed.

  • RetentionPeriod (integer) – Retention period to store on the object in seconds. This field can only be specified if Retention-Directive is REPLACE. If this field and Retention-Expiration-Date are specified a 400 error is returned. If neither is specified the bucket’s DefaultRetention period will be used. 0 is a legal value assuming the bucket’s minimum retention period is also 0.

  • ServerSideEncryption (string) –

    The server-side encryption algorithm used when storing this object in Amazon S3 (for example, AES256, aws:kms, aws:kms:dsse). Unrecognized or unsupported values won’t write a destination object and will receive a 400 Bad Request response.

    Amazon S3 automatically encrypts all new objects that are copied to an S3 bucket. When copying an object, if you don’t specify encryption information in your copy request, the encryption setting of the target object is set to the default encryption configuration of the destination bucket. By default, all buckets have a base level of encryption configuration that uses server-side encryption with Amazon S3 managed keys (SSE-S3). If the destination bucket has a default encryption configuration that uses server-side encryption with Key Management Service (KMS) keys (SSE-KMS), dual-layer server-side encryption with Amazon Web Services KMS keys (DSSE-KMS), or server-side encryption with customer-provided encryption keys (SSE-C), Amazon S3 uses the corresponding KMS key, or a customer-provided key to encrypt the target object copy.

    When you perform a CopyObject operation, if you want to use a different type of encryption setting for the target object, you can specify appropriate encryption-related headers to encrypt the target object with an Amazon S3 managed key, a KMS key, or a customer-provided key. If the encryption setting in your request is different from the default encryption configuration of the destination bucket, the encryption setting in your request takes precedence.

    With server-side encryption, Amazon S3 encrypts your data as it writes your data to disks in its data centers and decrypts the data when you access it. For more information about server-side encryption, see Using Server-Side Encryption in the Amazon S3 User Guide.

    Note

    For directory buckets, only server-side encryption with Amazon S3 managed keys (SSE-S3) ( AES256) is supported.

  • StorageClass (string) –

    If the x-amz-storage-class header is not used, the copied object will be stored in the STANDARD Storage Class by default. The STANDARD storage class provides high durability and high availability. Depending on performance needs, you can specify a different Storage Class.

    Note

    • Directory buckets - For directory buckets, only the S3 Express One Zone storage class is supported to store newly created objects. Unsupported storage class values won’t write a destination object and will respond with the HTTP status code 400 Bad Request.

    • Amazon S3 on Outposts - S3 on Outposts only uses the OUTPOSTS Storage Class.

    You can use the CopyObject action to change the storage class of an object that is already stored in Amazon S3 by using the x-amz-storage-class header. For more information, see Storage Classes in the Amazon S3 User Guide.

    Before using an object as a source object for the copy operation, you must restore a copy of it if it meets any of the following conditions:

    • The storage class of the source object is GLACIER or DEEP_ARCHIVE.

    • The storage class of the source object is INTELLIGENT_TIERING and it’s S3 Intelligent-Tiering access tier is Archive Access or Deep Archive Access.

    For more information, see RestoreObject and Copying Objects in the Amazon S3 User Guide.

  • WebsiteRedirectLocation (string) – If the destination bucket is configured as a website, redirects requests for this object copy to another object in the same bucket or to an external URL. Amazon S3 stores the value of this header in the object metadata. This value is unique to each object and is not copied when using the x-amz-metadata-directive header. Instead, you may opt to provide this header in combination with the x-amz-metadata-directive header.

  • SSECustomerAlgorithm (string) – Specifies the algorithm to use to when encrypting the object (for example, AES256).

  • SSECustomerKey (string) – Specifies the customer-provided encryption key for Amazon S3 to use in encrypting data. This value is used to store the object and then it is discarded; Amazon S3 does not store the encryption key. The key must be appropriate for use with the algorithm specified in the x-amz-server-side-encryption-customer-algorithm header.

  • SSECustomerKeyMD5 (string) –

    Specifies the 128-bit MD5 digest of the encryption key according to RFC 1321. Amazon S3 uses this header for a message integrity check to ensure that the encryption key was transmitted without error.

    Please note that this parameter is automatically populated if it is not provided. Including this parameter is not required

  • SSEKMSKeyId (string) – Specifies the Amazon Web Services KMS key ID to use for object encryption. All GET and PUT requests for an object protected by Amazon Web Services KMS will fail if not made via SSL or using SigV4. For information about configuring using any of the officially supported Amazon Web Services SDKs and Amazon Web Services CLI, see Specifying the Signature Version in Request Authentication in the Amazon S3 User Guide.

  • CopySourceSSECustomerAlgorithm (string) – Specifies the algorithm to use when decrypting the source object (for example, AES256).

  • CopySourceSSECustomerKey (string) – Specifies the customer-provided encryption key for Amazon S3 to use to decrypt the source object. The encryption key provided in this header must be one that was used when the source object was created.

  • CopySourceSSECustomerKeyMD5 (string) –

    Specifies the 128-bit MD5 digest of the encryption key according to RFC 1321. Amazon S3 uses this header for a message integrity check to ensure that the encryption key was transmitted without error.

    Please note that this parameter is automatically populated if it is not provided. Including this parameter is not required

  • RequestPayer (string) – Ignored by COS if present.

  • Tagging (string) – The tag-set for the object destination object this value must be used in conjunction with the TaggingDirective. The tag-set must be encoded as URL Query parameters.

  • ObjectLockMode (string) – The Object Lock mode that you want to apply to the copied object.

  • ObjectLockRetainUntilDate (datetime) – The date and time when you want the copied object’s Object Lock to expire.

  • ObjectLockLegalHoldStatus (string) – Specifies whether you want to apply a Legal Hold to the copied object.

  • ExpectedBucketOwner (string) – Ignored by COS if present.

  • ExpectedSourceBucketOwner (string) – Ignored by COS if present.

Return type:

dict

Returns:

Response Syntax

{
    'CopyObjectResult': {
        'ETag': 'string',
        'LastModified': datetime(2015, 1, 1)
    },
    'Expiration': 'string',
    'CopySourceVersionId': 'string',
    'VersionId': 'string',
    'ServerSideEncryption': 'AES256',
    'SSECustomerAlgorithm': 'string',
    'SSECustomerKeyMD5': 'string',
    'SSEKMSKeyId': 'string',
    'RequestCharged': 'requester'
}

Response Structure

  • (dict) –

    • CopyObjectResult (dict) –

      Container for all response elements.

      • ETag (string) –

        Returns the ETag of the new object. The ETag reflects only changes to the contents of an object, not its metadata.

      • LastModified (datetime) –

        Creation date of the object.

    • Expiration (string) –

      If the object expiration is configured, the response includes this header.

    • CopySourceVersionId (string) –

      Version of the copied object in the destination bucket.

    • VersionId (string) –

      Version ID of the newly created copy.

    • ServerSideEncryption (string) –

      The server-side encryption algorithm used when storing this object in Amazon S3 (for example, AES256, aws:kms).

    • SSECustomerAlgorithm (string) –

      If server-side encryption with a customer-provided encryption key was requested, the response will include this header confirming the encryption algorithm used.

    • SSECustomerKeyMD5 (string) –

      If server-side encryption with a customer-provided encryption key was requested, the response will include this header to provide round-trip message integrity verification of the customer-provided encryption key.

    • SSEKMSKeyId (string) –

      If present, specifies the ID of the Amazon Web Services Key Management Service (Amazon Web Services KMS) symmetric customer managed key that was used for the object.

    • RequestCharged (string) – Not returned by COS.