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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  3. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    The practice of employing fake 404 errors as a means to conceal censorship has also been reported in Thailand [7] and Tunisia. [8] In Tunisia, where censorship was severe before the 2011 revolution, people became aware of the nature of the fake 404 errors and created an imaginary character named "Ammar 404" who represents "the invisible censor ...

  4. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    In HTTP version 1.x, header fields are transmitted after the request line (in case of a request HTTP message) or the response line (in case of a response HTTP message), which is the first line of a message.

  5. Web server directory index - Wikipedia

    en.wikipedia.org/wiki/Web_server_directory_index

    If a server is configured to support server-side scripting, the list will usually include entries allowing dynamic content to be used as the index page (e.g. index.cgi, index.pl, index.php, index.shtml, index.jsp, default.asp) even though it may be more appropriate to still specify the HTML output (index.html.php or index.html.aspx), as this ...

  6. HTTP message body - Wikipedia

    en.wikipedia.org/wiki/HTTP_message_body

    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

  7. Persistent uniform resource locator - Wikipedia

    en.wikipedia.org/wiki/Persistent_uniform...

    A persistent uniform resource locator (PURL) is a uniform resource locator (URL) (i.e., location-based uniform resource identifier or URI) that is used to redirect to the location of the requested web resource.

  8. .htaccess - Wikipedia

    en.wikipedia.org/wiki/.htaccess

    An .htaccess (hypertext access) file is a directory-level configuration file supported by several web servers, used for configuration of website-access issues, such as URL redirection, URL shortening, access control (for different web pages and files), and more.

  9. X-Forwarded-For - Wikipedia

    en.wikipedia.org/wiki/X-Forwarded-For

    The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.