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This class of status codes indicates the action requested by the client was received, understood, and accepted. [2] 200 OK Standard response for successful HTTP requests. The actual response will depend on the request method used. In a GET request, the response will contain an entity corresponding to the requested resource.
The request/response message consists of the following: Request line, such as GET /logo.gif HTTP/1.1 or Status line, such as HTTP/1.1 200 OK, Headers; An empty line; Optional HTTP message body data; The request/status line and headers must all end with <CR><LF> (that is, a carriage return followed by a line feed).
Superseded by the traceparent header [45] X-Request-ID: f058ebd6-02f7-4d3f-942e-904344e8cde5: Save-Data [46] The Save-Data client hint request header available in Chrome, Opera, and Yandex browsers lets developers deliver lighter, faster applications to users who opt-in to data saving mode in their browser. Save-Data: on: Sec-GPC [47]
Each response header field has a defined meaning which can be further refined by the semantics of the request method or response status code. HTTP/1.1 example of request / response transaction Below is a sample HTTP transaction between an HTTP/1.1 client and an HTTP/1.1 server running on www.example.com , port 80.
Data connection already open; transfer starting. 150: File status okay; about to open data connection. 200 Series: The requested action has been successfully completed. 202: Command not implemented, superfluous at this site. 211: System status, or system help reply. 212: Directory status. 213: File status. 214: Help message.
The request has been rejected because it was anonymous. [17] 436 Bad Identity-Info The request has an Identity-Info header, and the URI scheme in that header cannot be dereferenced. [14]: p11 437 Unsupported Certificate The server was unable to validate a certificate for the domain that signed the request. [14]: p11 438 Invalid Identity Header
A simple PURL works by responding to an HTTP GET request by returning a response of type 302 (equivalent to the HTTP status code 302, meaning "Found"). The response contains an HTTP "Location" header, the value of which is a URL that the client should subsequently retrieve via a new HTTP GET request.
The X-Forwarded-For (XFF) HTTP header field is a common method for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer. The X-Forwarded-For HTTP request header was introduced by the Squid caching proxy server's developers. [citation needed]