# Constants
Content negotiation.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
Range requests.
Caching.
Errors.
Authentication.
HTTP header constants, all in canonical format.
Connection management headers.
ConnectionClose is the value for the Connection header to indicate the sender would like to close the connection.
Downloads.
Message body.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
Connection management headers.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
Connection management headers.
HTTP header constants, all in canonical format.
Redirects.
X-Content-Type-Options header and its value.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.
X-Content-Type-Options header and its value.
Proxies.
HTTP header constants, all in canonical format.
HTTP header constants, all in canonical format.