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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    Often the result of too much data being encoded as a query-string of a GET request, in which case it should be converted to a POST request. Called "Request-URI Too Long" previously. [16]: §10.4.15 415 Unsupported Media Type The request entity has a media type which the server or resource does not

  3. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    Content-Length: The length of the request body in octets (8-bit bytes). Content-Length: 348: Permanent RFC 9110: Content-MD5: A Base64-encoded binary MD5 sum of the content of the request body. Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ== Obsolete [15] RFC 1544, 1864, 4021: Content-Type: The Media type of the body of the request (used with POST and ...

  4. Basic access authentication - Wikipedia

    en.wikipedia.org/wiki/Basic_access_authentication

    In the context of an HTTP transaction, basic access authentication is a method for an HTTP user agent (e.g. a web browser) to provide a user name and password when making a request. In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic <credentials> , where <credentials> is the Base64 encoding of ID ...

  5. Query string - Wikipedia

    en.wikipedia.org/wiki/Query_string

    The length limits on request bodies are typically much higher than those on URL length. For example, the limit on POST size, by default, is 2 MB on IIS 4.0 and 128 KB on IIS 5.0. The limit is configurable on Apache2 using the LimitRequestBody directive, which specifies the number of bytes from 0 (meaning unlimited) to 2147483647 (2 GB) that are ...

  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; The request/status line and headers must all end with <CR><LF> (that is, a carriage return followed by a line feed).

  7. POST (HTTP) - Wikipedia

    en.wikipedia.org/wiki/POST_(HTTP)

    In computing, POST is a request method supported by HTTP used by the World Wide Web. By design, the POST request method requests that a web server accepts the data enclosed in the body of the request message, most likely for storing it. [1] It is often used when uploading a file or when submitting a completed web form.

  8. User-Agent header - Wikipedia

    en.wikipedia.org/wiki/User-Agent_header

    The user agent string format is currently specified by section 10.1.5 of HTTP Semantics. The format of the user agent string in HTTP is a list of product tokens (keywords) with optional comments. For example, if a user's product were called WikiBrowser, their user agent string might be WikiBrowser/1.0 Gecko/1.0. The "most important" product ...

  9. HTTP 403 - Wikipedia

    en.wikipedia.org/wiki/HTTP_403

    403.18 – Cannot execute request from that application pool; 403.19 – Cannot execute CGIs for the client in this application pool; 403.20 – Passport logon failed; 403.21 – Source access denied; 403.22 – Infinite depth is denied; 403.502 – Too many requests from the same client IP; Dynamic IP Restriction limit reached