There may be additional implementation-defined CGI header fields,
   whose field names SHOULD begin with "X-CGI-".  The server MAY ignore
   (and delete) any unrecognised header fields with names beginning "X-
   CGI-" that are received from the script.









 
RFC 3875                    CGI Version 1.1                 October 2004


6.4.  Response Message-Body

   The response message-body is an attached document to be returned to
   the client by the server.  The server MUST read all the data provided
   by the script, until the script signals the end of the message-body
   by way of an end-of-file condition.  The message-body SHOULD be sent
   unmodified to the client, except for HEAD requests or any required
   transfer-codings, content-codings or charset conversions.

      response-body = *OCTET

7.  System Specifications

7.1.  AmigaDOS

   Meta-Variables
      Meta-variables are passed to the script in identically named
      environment variables.  These are accessed by the DOS library
      routine GetVar().  The flags argument SHOULD be 0.  Case is
      ignored, but upper case is recommended for compatibility with
      case-sensitive systems.

   The current working directory
      The current working directory for the script is set to the
      directory containing the script.

   Character set
      The US-ASCII character set [9] is used for the definition of
      meta-variables, header fields and values; the newline (NL)
      sequence is LF; servers SHOULD also accept CR LF as a newline.

7.2.  UNIX

   For UNIX compatible operating systems, the following are defined:

   Meta-Variables
      Meta-variables are passed to the script in identically named
      environment variables.  These are accessed by the C library
      routine getenv() or variable environ.

   The command line
      This is accessed using the argc and argv arguments to main().  The
      words have any characters which are 'active' in the Bourne shell
      escaped with a backslash.

   The current working directory
      The current working directory for the script SHOULD be set to the
      directory containing the script.




 
RFC 3875                    CGI Version 1.1                 October 2004


   Character set
      The US-ASCII character set [9], excluding NUL, is used for the
      definition of meta-variables, header fields and CHAR values; TEXT
      values use ISO-8859-1.  The PATH_TRANSLATED value can contain any
      8-bit byte except NUL.  The newline (NL) sequence is LF; servers
      should also accept CR LF as a newline.

7.3.  EBCDIC/POSIX

   For POSIX compatible operating systems using the EBCDIC character
   set, the following are defined:

   Meta-Variables
      Meta-variables are passed to the script in identically named
      environment variables.  These are accessed by the C library
      routine getenv().

   The command line
      This is accessed using the argc and argv arguments to main().  The
      words have any characters which are 'active' in the Bourne shell
      escaped with a backslash.

   The current working directory
      The current working directory for the script SHOULD be set to the
      directory containing the script.