- HTTP standard attributes
Name Description Cache-Control Cache action of the web page when the object is downloaded Content-Disposition Name of the object when downloaded Content-Encoding Content encoding format when the object is downloaded Content-Language Specifies the content language encoding when the object is downloaded Expires Expiry time Content-Length Size of the object Content-Type File type of the object Last-Modified Time of last modification
- User Meta
This attribute allows you to enrich the description of objects using custom metadata. In OSS, all parameters prefixed with "x-oss-meta-" are considered as User Meta, such as x-oss-meta-location. A single object can have multiple similar parameters, but the total size of all User Meta cannot exceed 8 KB. User Meta information is returned in the HTTP header during GetObject or HeadObject operations.
Set object Meta when uploading objects
You can set object Meta when uploading objects.
You can set object Meta when using multipart uploads.
Modify object Meta after uploading objects
To modify the object metadata without modifying the actual data, using the copy object interface is recommended. In this way, you only need to apply the new metadata in the HTTP header and set the copy source and destination addresses to the current address of the object.
Retrieve object Meta
This feature applies when you must retrieve object Meta, but not the object data.