Upload Part - Copy
描述：通过拷贝方式创建上传一个分片（不上传具体的文件内容。而是通过COPY方式对系统内另一文件进行复制）。
请求格式：
PUT /<ObjectName>?partNumber=PartNumber&uploadId=UploadId HTTP/1.1
Host: <Your-Bucket-Name>.ss.bscstorage.com
Date: <date>
x-amz-copy-source: </source-bucket/source-object>
Authorization: <authorization string> #请参照《签名算法》
- 响应：
HTTP/1.1 200 OK
Date: Tue, 08 Apr 2014 02:59:47 GMT
Connection: keep-alive
ETag: "<文件的MD5值>"
x-amz-request-id: 0000106c-1608-0810-4621-00163e000064
x-amz-s2-requester: <Your UserName>
<?xml version="1.0" encoding="UTF-8"?>
<CopyObjectResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<LastModified>Mon, 08 Aug 2016 05:04:10 GMT</LastModified>
<ETag>870c06c00566c4fb1861bb10f34d1904</ETag>
</CopyObjectResult>
- Request Parameters(请求参数)：
| Parameter | Description | Required |
|---|---|---|
| partNumber | 文件分片的序号，从1开始 | Yes |
| uploadId | 通过Initiate Multipart Upload（大文件分片上传初始化接口）获得的uploadId值 | Yes |
- Request Headers（请求头）：
| Name | Description | Required |
|---|---|---|
| x-amz-copy-source | 被copy的文件地址。格式：/source-bucket/source-object，需要整体进行urlencode编码. | Yes |
| Content-Length | 必须是0 | =0 |
| x-amz-copy-source-if-match | 如果指定的ETag与源文件的ETag匹配, 则可copy源文件, 否则返回412(PreconditionFailed) | No |
| x-amz-copy-source-if-nonematch | 如果指定的ETag与源文件的ETag不匹配, 则可copy源文件, 否则返回412(PreconditionFailed) | No |
| x-amz-copy-source-if-unmodified-since | 如果指定的时间开始源文件没有修改, 则可copy源文件, 否则返回412(PreconditionFailed) | No |
| x-amz-copy-source-if-modified-since | 如果指定的时间开始源文件有修改, 则可copy源文件, 否则返回412(PreconditionFailed) | No |
Response Body（响应XML Body）：
Name Description CopyObjectResult 包含ETag和LastModified元素 ETag 文件的ETag CopyObjectResult 文件的最后修改时间 请求示例：
curl -v -X PUT -H "x-amz-copy-source: /bucket-123/path/to/file123.txt" -H "Date:
Sat, 20 Nov 2286 17:46:39 GMT" -H "Authorization: AWS <access_key>:<ssig>" "http://<Your-Bucket-Name>.ss.bscstorage.com/path/to/myfile.txt?partNumber=<PartNumber>&uploadId=<UploadId>"