Modifying Object Metadata
Functions
This operation modifies, deletes, or adds metadata to uploaded objects in a bucket.
Request Syntax
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PUT /ObjectName?metadata HTTP/1.1
Host: bucketname.obs.cn-north-4.myhuaweicloud.com
Content-Type: application/xml
Content-Length: length
Authorization: authorization
Date: date
<Optional Additional Header>
<object Content>
|
Request Parameters
|
Parameter |
Description |
Mandatory |
|---|---|---|
|
versionId |
Object version ID Type: string |
No |
Request Headers
OBS supports the six HTTP request headers: Cache-Control, Expires, Content-Encoding, Content-Disposition, Content-Type, and Content-Language. It saves these header values in the metadata of the object. When the object is downloaded or queried, the saved values are set for corresponding HTTP headers and returned to the client.
|
Header |
Description |
Mandatory |
|---|---|---|
|
x-obs-metadata-directive |
Metadata operation indicator. The value can be REPLACE_NEW or REPLACE. REPLACE_NEW: The metadata that has an existing value is replaced. A value is assigned to the metadata that does not have a value. The metadata that is not specified remains unchanged. (Note: a header with custom metadata is replaced.) REPLACE: Use the header field carried in the current request to replace the original metadata. The metadata that is not specified (except x-obs-storage-class) will be deleted. Type: string |
Yes |
|
Cache-Control |
Specifies the cache behavior of the web page when the object is downloaded. Type: string |
No |
|
Content-Disposition |
Specifies the name of the object when it is downloaded. Type: string |
No |
|
Content-Encoding |
Specifies the content encoding format when an object is being uploaded. Type: string |
No |
|
Content-Language |
Specifies the content language format when an object is downloaded. Type: string |
No |
|
Content-Type |
Object file type. Type: string |
No |
|
Expires |
Specifies the cache expiration time of the web page when the object is downloaded. Type: string |
No |
|
x-obs-website-redirect-location |
When the bucket is configured with the website redirection, the request for obtaining the object can be redirected to another object or an external URL in the bucket. In the following example, the request header sets the redirection to an object (anotherPage.html) in the same bucket: x-obs-website-redirect-location:/anotherPage.html In the following example, the request header sets the object redirection to an external URL: x-obs-website-redirect-location:http://www.example.com/ Type: string Constraint: The value must be prefixed by a slash (/), http://, or https://. The length of the value cannot exceed 2 KB. |
No |
|
x-obs-storage-class |
Specifies the storage class of an object. Type: string OBS provides three storage classes: Standard (STANDARD), Infrequent Access (WARM), and Archive (COLD). Therefore, values for this element can be STANDARD, WARM, and COLD. The spell of these values is case sensitive. Example: x-obs-storage-class: STANDARD |
No |
|
x-obs-meta-* |
A message header starting with x-obs-meta- can be added to a request to add custom metadata for object management. Custom metadata will be returned in the response header when you retrieve or query the metadata of the object. For more information, see Managing Object Metadata. Type: string Example: x-obs-meta-test: test metadata |
No |
Request Elements
This request involves no elements.
Response Syntax
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HTTP/1.1 status_code
Content-Type: type
Date: date
Content-Length: length
Etag: etag
Last-Modified: time
|
Response Headers
|
Header |
Description |
|---|---|
|
x-obs-metadata-directive |
Metadata operation indicator. The value can be REPLACE_NEW or REPLACE. Type: string |
|
Cache-Control |
Specifies the cache behavior of the web page when the object is downloaded. If the request carries this header field, the response message must contain this header field. Type: string |
|
Content-Disposition |
Specifies the name of the object when it is downloaded. If the request carries this header field, the response message must contain this header field. Type: string |
|
Content-Encoding |
Specifies the content encoding format when an object is being uploaded. If the request carries this header field, the response message must contain this header field. Type: string |
|
Content-Language |
Specifies the content language format when an object is downloaded. If the request carries this header field, the response message must contain this header field. Type: string |
|
Content-Type |
Object file type. If the request carries this header field, the response message must contain this header field. Type: string |
|
Expires |
Specifies the cache expiration time of the web page when the object is downloaded. If the request carries this header field, the response message must contain this header field. Type: string |
|
x-obs-website-redirect-location |
When the bucket is configured with the website redirection, the request for obtaining the object can be redirected to another object or an external URL in the bucket. If the request carries this header field, the response message must contain this header field. Type: string |
|
x-obs-storage-class |
Specifies the storage class of an object. If the request carries this header field, the response message must contain this header field. Type: string |
|
x-obs-meta-* |
Custom metadata is used to manage objects in a customized manner. If the request carries this header field, the response message must contain this header field. Type: string |
Response Elements
This response involves no elements.
Error Responses
No special error responses are returned. For details about error responses, see Table 2.
Sample Request 1
Adding Object Metadata
Add the following metadata to the object: Content-Type:application/zip and x-obs-meta-test:meta.
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PUT /object?metadata HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.cn-north-4.myhuaweicloud.com
Accept: */*
Date: WED, 01 Jul 2015 14:24:33 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:NxtSMS0jaVxlLnxlO9awaMTn47s=
x-obs-metadata-directive:REPLACE_NEW
Content-Type:application/zip
x-obs-meta-test:meta
|
Sample Response 1
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HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: 8DF400000163D3E4BB5905C41B6E65B6
Accept-Ranges: bytes
Content-Type: binary/octet-stream
x-obs-id-2: 32AAAQAAEAABAAAQAAEAABAAAQAAEAABCSD3nAiTaBoeyt9oHp9vTYtXnLDmwV6D
Date: WED, 01 Jul 2015 04:19:21 GMT
Content-Length: 0
x-obs-metadata-directive:REPLACE_NEW
Content-Type:application/zip
x-obs-meta-test:meta
|
Sample Request 2
Modifying Object Metadata
If metadata x-obs-meta-test:testmeta exists in the object and the value of x-obs-storage-class is WARM, change the metadata x-obs-meta-test of the object to newmeta and change x-obs-storage-class to COLD.
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PUT /object?metadata HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.cn-north-4.myhuaweicloud.com
Accept: */*
Date: WED, 01 Jul 2015 14:24:33 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:NxtSMS0jaVxlLnxlO9awaMTn47s=
x-obs-metadata-directive:REPLACE_NEW
x-obs-meta-test:newmeta
x-obs-storage-class:COLD
|
Sample Response 2
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HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: 8DF400000163D3E4BB5905C41B6E65B6
Accept-Ranges: bytes
Content-Type: binary/octet-stream
x-obs-id-2: 32AAAQAAEAABAAAQAAEAABAAAQAAEAABCSD3nAiTaBoeyt9oHp9vTYtXnLDmwV6D
Date: WED, 01 Jul 2015 04:19:21 GMT
Content-Length: 0
x-obs-metadata-directive:REPLACE_NEW
x-obs-meta-test:newmeta
x-obs-storage-class:COLD
|
Sample Request 3
Deleting Object Metadata
Metadata x-obs-meta-test:newmeta and Content-Type:application/zip exist in the object, and delete x-obs-meta-test.
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PUT /object?metadata HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.cn-north-4.myhuaweicloud.com
Accept: */*
Date: WED, 01 Jul 2015 14:24:33 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:NxtSMS0jaVxlLnxlO9awaMTn47s=
x-obs-metadata-directive:REPLACE
Content-Type:application/zip
|
Sample Response 3
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HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: 8DF400000163D3E4BB5905C41B6E65B6
Accept-Ranges: bytes
Content-Type: binary/octet-stream
x-obs-id-2: 32AAAQAAEAABAAAQAAEAABAAAQAAEAABCSD3nAiTaBoeyt9oHp9vTYtXnLDmwV6D
Date: WED, 01 Jul 2015 04:19:21 GMT
Content-Length: 0
x-obs-metadata-directive:REPLACE
Content-Type:application/zip
|
Last Article: Obtaining Object ACL Configuration
Next Article: Modifying an Object
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