Help & DocumentationCloud Object StorageAPI DocumentationObject APIsMultipart UploadUpload Part - Copy

Upload Part - Copy

Last updated: 2019-12-16 18:11:51

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Description

This API is used to copy the parts of an object from the source path to the destination path. You can use x-cos-copy-source to specify the source object and use x-cos-copy-source-range to specify the byte range (allowed part size: 5 MB - 5 GB).

  • If the destination object and the source object are in different regions, and the part size of the destination object will exceed 5 GB, you will need to use multipart upload or multipart copy API to copy the object.
  • To upload an object in parts, you must first initialize the multipart upload. A unique descriptor (upload ID) will be returned in the response of multipart upload initialization, which needs to be carried in the multipart upload request.

Version

If versioning is enabled for the bucket, x-cos-copy-source identifies the current version of the object to be copied. If the current version is a delete marker and no version is specified for x-cos-copy-source, COS will consider the object as a deleted object and return a 404 error. If you specify a versionId in x-cos-copy-sourceand and the versionId is a delete marker, COS will return an HTTP 400 error as it is not allowed to use a delete marker as the version of x-cos-copy-source.

Request

Sample Request

PUT /examplebucket?partNumber=PartNumber&uploadId=UploadId  HTTP/1.1
Host: <Bucketname-APPID>.cos.<Region>.myqcloud.com
Date: GMT Date
Authorization: Auth String
x-cos-copy-source: <Bucketname>-<APPID>.cos.<Region>.myqcloud.com/filepath
x-cos-copy-source-range: bytes=first-last
x-cos-copy-source-if-match: etag
x-cos-copy-source-if-none-match : etag
x-cos-copy-source-if-unmodified-since: time_stamp
x-cos-copy-source-if-modified-since: time_stamp

Authorization: Auth String (see Request Signature for more information).

Request Headers

Common Headers

The implementation of this operation uses common request headers. For more information on common request headers, see Common Request Headers.

Special Headers

Required Headers

The implementation of this operation uses the following required request headers:

Name Description Type Required
x-cos-copy-source URL path to the source object. A historical version can be specified using the versionId subresource String Yes

Recommended Headers

The implementation of this operation uses the following recommended request headers:

Name Description Type Required
x-cos-copy-source-range Byte range of the source object. The range value must be in the format of bytes=first-last, where both first and last are offsets starting from 0.
For example, bytes=0-9 means that you want to copy the first 10 bytes of data of the source object. If this parameter is not specified, the entire object will be copied		 String No
x-cos-copy-source-If-Modified-Since If the object is modified after the specified time, the operation will be performed; otherwise, 412 will be returned.
This header can be used together with x-cos-copy-source-If-None-Match. If it is used together with other conditions, a conflict will be returned		 String No
x-cos-copy-source-If-Unmodified-Since If the object is not modified after the specified time, the operation will be performed; otherwise, 412 will be returned.
This header can be used together with x-cos-copy-source-If-Match. If it is used together with other conditions, a conflict will be returned		 String No
x-cos-copy-source-If-Match If the Etag of the object is the same as the specified one, the operation will be performed; otherwise, 412 will be returned.
This header can be used together with x-cos-copy-source-If-Unmodified-Since. If it is used together with other conditions, a conflict will be returned		 String No
x-cos-copy-source-If-None-Match If the Etag of the object is different from the specified one, the operation will be performed; otherwise, 412 will be returned.
This header can be used together with x-cos-copy-source-If-Modified-Since. If it is used together with other conditions, a conflict will be returned		 string No

Request Parameters

Name Description Type Required
partNumber Part number String Yes
uploadId To upload a file in parts, you must first initialize the multipart upload. A unique descriptor (upload ID) will be returned in the response of multipart upload initialization, which needs to be carried in the multipart upload request String Yes

Request Body

The request body of this request is empty.

Response

Response Headers

Common Response Headers

This response contains common response headers. For more information on common response headers, see Common Response Headers.

Special Response Headers

Name Description Type
x-cos-copy-source-version-id Version of the copied source object if versioning is enabled for the source bucket String
x-cos-server-side-encryption If the object is stored with COS-managed server-side encryption, the response will contain this header and the value of the encryption algorithm used (AES256) String

Response Body

This response body returns application/xml data. The following contains all the node data:

<?xml version="1.0" encoding="UTF-8" ?>
<CopyPartResult>
   <ETag>"ba82b57cfdfda8bd17ad4e5879ebb4fe"</ETag>
   <LastModified>2017-09-04T04:45:45</LastModified>
</CopyPartResult>

The data are described in details below:

Name Description Type
CopyPartResult Returns the result of the copy String
ETag Returns the MD5 checksum of the object. The value of ETag can be used to check whether the object content has changed String
LastModified Returns the last modified time of the object in GMT time String

Example

Request

PUT /exampleobject?partNumber=1&uploadId=1505706248ca8373f8a5cd52cb129f4bcf85e11dc8833df34f4f5bcc456c99c42cd1ffa2f9 HTTP/1.1
User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.13.1.0 zlib/1.2.3 libidn/1.18 libssh2/1.2.2
Accept: */*
x-cos-copy-source:examplebucket-1250000000.cos.ap-shanghai.myqcloud.com/exampleobject1
x-cos-copy-source-range: bytes=10-100
Host: examplebucket-1250000000.cos.ap-shanghai.myqcloud.com
Authorization:q-sign-algorithm=sha1&q-ak=AKIDDNMEycgLRPI2axw9xa2Hhx87wZ3MqQCn&q-sign-time=1507530223;1508530223&q-key-time=1507530223;1508530223&q-header-list=&q-url-param-list=&q-signature=d02640c0821c49293e5c289fa07290e6b2f05cb2

Response

HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: 133 
Connection: keep-alive 
Date: Mon, 04 Sep 2017 04:45:45 GMT
Server: tencent-cos
x-cos-request-id: NTlkYjFjYWJfMjQ4OGY3MGFfNGIzZV9k

<CopyPartResult>
   <ETag>"ba82b57cfdfda8bd17ad4e5879ebb4fe"</ETag>
   <LastModified>2017-09-04T04:45:45</LastModified>
</CopyPartResult>