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The HTTP Location header is used to force a web browser to load a different web page. It is passed as part of the Server Response by a web server when the requested URL has:
The HTTP Location header should be sent with a HTTP Response Code of 3xx. While the internet standard RFC 1945 (HTTP 1.0) requires a complete absolute URI for redirection[1][2], the most popular web browsers support the passing of a Relative URL as the value for a Location: header.[citation needed]
[edit] ExampleThe internet standard requires an absoluteURI token to follow a Location: header, which means it must contain a scheme[3] (e.g., http:, https:, telnet:, mailto:)[4] and conforms to scheme-specific syntax and semantics. For example, the HTTP scheme-specific syntax and semantics for HTTP URLs requires a "host" (web server address) and "absolute path", with optional components of "port" and "query". In the case that there is no absolute path present, it must be given as "/" when used as a Request-URI for a resource.[5] Client request: GET /index.html HTTP/1.1 Host: www.example.com Server response: HTTP/1.1 302 Found Location: http://www.wikipedia.org/index.php [edit] Relative URL ExampleThis example, while incorrect based on the internet standard[6], works in all popular browsers.[citation needed] Client request: GET /blog HTTP/1.1 Host: www.example.com Server response: HTTP/1.1 302 Found Location: /blog/ [edit] NotesNot to be confused with JavaScript location variable. [edit] References
[edit] See also |
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