Load cups into easysw/current.

[thirdparty/cups.git] / CGI.txt

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-CGI - CUPS v1.1.21 - 06/29/2004
--------------------------------
-
-This file describes the experimental scripting/CGI support
-provided by CUPS starting with CUPS 1.1.19.
-
-WARNING: CGI support is not complete; you may run into problems
-and limitations in the implementation of CGI in CUPS that are
-not present in full-featured web servers like Apache.
-
-
-OVERVIEW OF CGI SUPPORT IN CUPS
-
-CUPS has traditionally provided a dynamic web interface through
-four CGI programs that are executed when users open special
-directories on the CUPS server.  Each CGI performs
-administration, class, job, and printer functions as directed by
-the user, but the actual programs that are run and functions
-that are available are limited to those that were originally
-designed into the scheduler.
-
-Starting with CUPS 1.1.19, support is now available for CGI
-programs and specific scripting languages, currently Java, Perl,
-PHP, and Python.  The interpreters for these languages are
-currently configured at compile time.  Future versions may
-expand the interface to allow for generic support of scripting
-languages similar to the Apache "AddHandler" directive, but with
-external programs instead of modules.
-
-The following MIME types are reserved for the CGI support in
-CUPS (the names have been chosen to mirror those used by
-Apache):
-
-    application/x-httpd-cgi      CGI script/program
-    application/x-httpd-java     Java program
-    application/x-httpd-perl     Perl script
-    application/x-httpd-php      PHP script
-    application/x-httpd-python   Python script
-
-In order to enable the corresponding type, you must create a new
-/etc/cups/cgi.types file which maps the filename extensions to
-the appropriate MIME type, for example:
-
-    application/x-httpd-cgi cgi
-    application/x-httpd-php php
-
-CGI scripts/programs (application/x-httpd-cgi) also must have
-execution permissions to be treated as a CGI script or program.
-
-
-LIMITATIONS
-
-CUPS implements most of the CGI/1.1 specification, with the
-following limitations:
-
-    - No Location: redirection support.
-    - No PATH_INFO or PATH_TRANSLATED support.
-    - Limited HTTP field support; only the Content-Length
-      (CONTENT_LENGTH), Cookie (HTTP_COOKIE), and User-Agent
-      (HTTP_USER_AGENT) fields are placed in environment
-      variables at this time.
-
-
-REPORTING PROBLEMS
-
-If you have problems, READ THE DOCUMENTATION FIRST!  If the
-documentation does not solve your problems please send an email
-to "cups-support@cups.org".  Include your operating system and
-version, compiler and version, and any errors or problems you've
-run into. The "/var/log/cups/error_log" file should also be sent,
-as it often helps to determine the cause of your problem.
-
-If you are running a version of Linux, be sure to provide the
-Linux distribution you have, too.
-
-Please note that the "cups-support@cups.org" email address goes
-to the CUPS developers; they are busy people, so your email may
-go unanswered for days or weeks.  In general, only general build
-or distribution problems will actually get answered - for
-end-user support see the "README.txt" for a summary of the
-resources available.