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The HTTP Location header field is returned in responses from an HTTP server under two circumstances: #To ask a web browser to load a different web page (URL redirection). In this circumstance, the Location header should be sent with an HTTP status code of 3xx. It is passed as part of the response by a web server when the requested URI has: # * Moved temporarily; # * Moved permanently; or # * Processed a request, e.g. a POSTed form, and is providing the result of that request at a different URI #To provide information about the location of a newly created resource. In this circumstance, the Location header should be sent with an HTTP status code of 201 or 202. An obsolete version of the HTTP 1.1 specifications (IETF RFC 2616) required a complete absolute URI for redirection. The IETF HTTP working group found that the most popular web browsers tolerate the passing of a relative URL〔(IETF HTTPbis Working Group Ticket 185 )〕 and, consequently, the updated HTTP 1.1 specifications (IETF RFC 7231) relaxed the original constraint, allowing the use of relative URLs in Location headers. == Examples == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「The HTTP Location header field is returned in responses from an HTTP server under two circumstances:」の詳細全文を読む スポンサード リンク
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