Supported Common Response Headers

The following table identifies the response headers that are common to most Amazon S3 responses.

Table 1-9 Common Supported Response Headers

Supported Response Header	Description
Content-Length	The Content-Length header field identifies the response body length in bytes. Type: String Default: None
Content-Type	The Content-Type header field identifies the MIME type of the content. For example, Content-Type: text/html; charset=utf-8 Type: String Default: None
Date	The Date header field identifies the data and time of the S3 response. For example, Wed, 01 Mar 2018 12:00:00 GMT. Type: String Default: None
ETag	The ETag header field identifies a specific version of a resource (a hash of the object). The ETag reflects changes only to the contents of an object, not its metadata. The ETag is an MD5 digest of the object data. Type: String
Server	The Server header field identifies the name of the server that created the response. Type: String Valid Value: Apache
x-amz-delete-marker	The x-amz-delete-marker identifies whether the object returned was a delete marker (true) or not (false). Type: Boolean Valid Values: true | false Default: false
x-amz-request-id	The x-amz-request-id is a value that is created by Amazon S3 to uniquely identify a request for troubleshooting purposes. Type: String Default: None
x-amz-version-id	When versioning is enabled, the x-amz-version-id identifies the version of the object. When versioning is suspended, the version ID is always null. Type: String Valid Values: null | string Default: null
x-amz-tagging-count	When the count is greater than zero, the x-amz-tagging-count returns the count of the tags associated with the object. Type: String Default: None