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83 lines
2.6 KiB
83 lines
2.6 KiB
4 months ago
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<HTML>
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<!-- SECTION: Getting Started -->
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<HEAD>
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<TITLE>Using CGI Programs</TITLE>
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<LINK REL="STYLESHEET" TYPE="text/css" HREF="../cups-printable.css">
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</HEAD>
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<BODY>
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<H1 CLASS="title">Using CGI Programs</H1>
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<P>CUPS provides a dynamic web interface through dedicated CGI programs that
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are executed when users open special directories on the CUPS server. Each CGI
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performs administration, class, help, job, and printer functions as directed by
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the user, but the actual programs that are run and functions that are available
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are limited to those that were originally designed into the scheduler.</P>
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<P>CUPS also supports CGI programs and specific scripting languages (Java, Perl,
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PHP, and Python) for pages you want to provide. The interpreters for these
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languages are currently configured at compile time and are associated with
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MIME media types. <a href="#TABLE1">Table 1</a> shows the MIME media types that
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are reserved for each type of page and are the same as those used by the Apache
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web server.</P>
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<DIV CLASS="table"><TABLE SUMMARY="CGI MIME Media Types">
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<CAPTION><A NAME="TABLE1">Table 1</A>: CGI MIME Media Types</CAPTION>
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<TR>
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<TH>MIME Media Type</TH>
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<TH>Description</TH>
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</TR>
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<TR>
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<TD>application/x-httpd-cgi</TD>
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<TD>CGI script/program</TD>
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</TR>
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<TR>
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<TD>application/x-httpd-java</TD>
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<TD>Java program</TD>
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</TR>
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<TR>
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<TD>application/x-httpd-perl</TD>
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<TD>Perl script</TD>
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</TR>
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<TR>
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<TD>application/x-httpd-php</TD>
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<TD>PHP script</TD>
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</TR>
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<TR>
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<TD>application/x-httpd-python</TD>
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<TD>Python script</TD>
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</TR>
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</TABLE></DIV>
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<H2><A NAME="CONFIG">Configuring the Server</A></H2>
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<P>In order to enable the corresponding type, you must create a
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new <VAR>/etc/cups/cgi.types</VAR> file which maps the filename
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extensions to the appropriate MIME types, for example:</P>
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<PRE CLASS="command">
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application/x-httpd-cgi cgi
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application/x-httpd-java class
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application/x-httpd-perl pl
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application/x-httpd-php php
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application/x-httpd-python py
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</PRE>
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<P>CGI scripts/programs (application/x-httpd-cgi) also must be owned by root, have execution permissions, and not have world or group write permissions to be treated as a CGI script or program.</P>
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<H2><A NAME="LIMITS">Limitations</A></H2>
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<P>CUPS implements most of the CGI/1.1 specification, with the
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following exceptions:</P>
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<UL>
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<LI>No PATH_INFO or PATH_TRANSLATED support</LI>
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<LI>Limited HTTP field support; only the Content-Length (CONTENT_LENGTH), Content-Type (CONTENT_TYPE), Cookie (HTTP_COOKIE), Referrer (HTTP_REFERRER), and User-Agent (HTTP_USER_AGENT) fields are placed in environment variables at this time</LI>
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</UL>
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</BODY>
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</HTML>
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