Table 1 describes headers common to OBS REST responses.

**Table 1** Common response headers
Header	Description
Content-Length	Indicates the length (in bytes) of a response body. Type: String Default: None
Connection	Indicates whether the connection to the server is opened or closed. Type: String. Valid values: keep-alive \| close Default: None
Date	Indicates the date and time at which OBS responds to a request. Type: String Default: None
ETag	Indicates the hash value of an object. The entity tag (ETag) only reflects changes to the contents of an object, not its metadata. Type: String
x-amz-id-2	Indicates a special token that helps OBS troubleshoot faults. Type: String Default: None
x-amz-request-id	Indicates the value created by OBS to uniquely identify a request. OBS uses this value to troubleshoot faults. Type: String Default: None
x-reserved	Indicates the copyright. Type: String Default: None

Common Response Headers