HTTP header field

In 2011, another Standards Track RFC described Metalink in HTTP header fields.

This status check web API should return 303 See Other to the caller when the task is complete, along with a URI from which to retrieve the result in the Location HTTP header field.

The X-Forwarded-For (XFF) HTTP header field is a de facto standard for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer.

The Do Not Track (DNT) header is the proposed HTTP header field that requests that a web application disable either its tracking or cross-site user tracking (the ambiguity remains unresolved) of an individual user.

For increased convenience, the multiple download locations for a file (FTP/HTTP/P2P) and other metadata are made available in HTTP header fields and/or an XML file with the extension or .

Metalink in HTTP header fields makes use of existing standard HTTP header fields such as ETags, Link header fields (for mirrors and P2P), and Instance Digests (for hashes).