If the client request required HTTP Authentication [5] (e.g., the
   AUTH_TYPE meta-variable is set to "Basic" or "Digest"), then the
   value of the REMOTE_USER meta-variable MUST be set to the user-ID
   supplied.

4.1.12.  REQUEST_METHOD

   The REQUEST_METHOD meta-variable MUST be set to the method which
   should be used by the script to process the request, as described in
   section 4.3.

      REQUEST_METHOD   = method
      method           = "GET" | "POST" | "HEAD" | extension-method
      extension-method = "PUT" | "DELETE" | token

   The method is case sensitive.  The HTTP methods are described in
   section 5.1.1 of the HTTP/1.0 specification [1] and section 5.1.1 of
   the HTTP/1.1 specification [4].

4.1.13.  SCRIPT_NAME

   The SCRIPT_NAME variable MUST be set to a URI path (not URL-encoded)
   which could identify the CGI script (rather than the script's
   output).  The syntax is the same as for PATH_INFO (section 4.1.5)

      SCRIPT_NAME = "" | ( "/" path )

   The leading "/" is not part of the path.  It is optional if the path
   is NULL; however, the variable MUST still be set in that case.

   The SCRIPT_NAME string forms some leading part of the path component
   of the Script-URI derived in some implementation-defined manner.  No
   PATH_INFO segment (see section 4.1.5) is included in the SCRIPT_NAME
   value.

4.1.14.  SERVER_NAME

   The SERVER_NAME variable MUST be set to the name of the server host
   to which the client request is directed.  It is a case-insensitive
   hostname or network address.  It forms the host part of the
   Script-URI.

      SERVER_NAME = server-name
      server-name = hostname | ipv4-address | ( "[" ipv6-address "]" )








 
RFC 3875                    CGI Version 1.1                 October 2004


   A deployed server can have more than one possible value for this
   variable, where several HTTP virtual hosts share the same IP address.
   In that case, the server would use the contents of the request's Host
   header field to select the correct virtual host.

4.1.15.  SERVER_PORT

   The SERVER_PORT variable MUST be set to the TCP/IP port number on
   which this request is received from the client.  This value is used
   in the port part of the Script-URI.

      SERVER_PORT = server-port
      server-port = 1*digit

   Note that this variable MUST be set, even if the port is the default
   port for the scheme and could otherwise be omitted from a URI.

4.1.16.  SERVER_PROTOCOL

   The SERVER_PROTOCOL variable MUST be set to the name and version of
   the application protocol used for this CGI request.  This MAY differ
   from the protocol version used by the server in its communication
   with the client.

      SERVER_PROTOCOL   = HTTP-Version | "INCLUDED" | extension-version
      HTTP-Version      = "HTTP" "/" 1*digit "." 1*digit
      extension-version = protocol [ "/" 1*digit "." 1*digit ]
      protocol          = token

   Here, 'protocol' defines the syntax of some of the information
   passing between the server and the script (the 'protocol-specific'
   features).  It is not case sensitive and is usually presented in
   upper case.  The protocol is not the same as the scheme part of the
   script URI, which defines the overall access mechanism used by the
   client to communicate with the server.  For example, a request that
   reaches the script with a protocol of "HTTP" may have used an "https"
   scheme.

   A well-known value for SERVER_PROTOCOL which the server MAY use is
   "INCLUDED", which signals that the current document is being included
   as part of a composite document, rather than being the direct target
   of the client request.  The script should treat this as an HTTP/1.0