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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
| commit | fe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch) | |
| tree | b80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /docs/manual/mod/mod_cgi.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip | |
Adding upstream version 2.4.56.upstream/2.4.56
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/mod/mod_cgi.html.en')
| -rw-r--r-- | docs/manual/mod/mod_cgi.html.en | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_cgi.html.en b/docs/manual/mod/mod_cgi.html.en new file mode 100644 index 0000000..915f083 --- /dev/null +++ b/docs/manual/mod/mod_cgi.html.en @@ -0,0 +1,294 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>mod_cgi - Apache HTTP Server Version 2.4</title> +<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> +<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> +<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<link href="../images/favicon.ico" rel="shortcut icon" /></head> +<body> +<div id="page-header"> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</p> +<img alt="" src="../images/feather.png" /></div> +<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> +<div id="path"> +<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache Module mod_cgi</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_cgi.html" title="English"> en </a> | +<a href="../fr/mod/mod_cgi.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | +<a href="../ja/mod/mod_cgi.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | +<a href="../ko/mod/mod_cgi.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Execution of CGI scripts</td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>cgi_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_cgi.c</td></tr></table> +<h3>Summary</h3> + + <p>Any file that has the handler + <code>cgi-script</code> will be treated + as a CGI script, and run by the server, with its output being + returned to the client. Files acquire this handler either by + having a name containing an extension defined by the + <code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code> directive, or by being + in a <code class="directive"><a href="../mod/mod_alias.html#scriptalias">ScriptAlias</a></code> + directory.</p> + + <p>For an introduction to using CGI scripts with Apache, see + our tutorial on <a href="../howto/cgi.html">Dynamic Content + With CGI</a>.</p> + + <p>When using a multi-threaded MPM under unix, the module + <code class="module"><a href="../mod/mod_cgid.html">mod_cgid</a></code> should be used in place of + this module. At the user level, the two modules are essentially + identical.</p> + + <p>For backward-compatibility, the cgi-script handler will also be activated + for any file with the mime-type <code>application/x-httpd-cgi</code>. The + use of the magic mime-type is deprecated.</p> +</div> +<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Topics</h3> +<ul id="topics"> +<li><img alt="" src="../images/down.gif" /> <a href="#env">CGI Environment variables</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#cgi-debug">CGI Debugging</a></li> +</ul><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#scriptlog">ScriptLog</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#scriptlogbuffer">ScriptLogBuffer</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#scriptloglength">ScriptLogLength</a></li> +</ul> +<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_cgi">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_cgi">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><code class="directive"><a href="../mod/core.html#acceptpathinfo">AcceptPathInfo</a></code></li> +<li><code class="directive"><a href="../mod/core.html#options">Options</a></code> ExecCGI</li> +<li><code class="directive"><a href="../mod/mod_alias.html#scriptalias">ScriptAlias</a></code></li> +<li><code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code></li> +<li><a href="../suexec.html">Running CGI programs under different + user IDs</a></li> +<li><a href="http://www.ietf.org/rfc/rfc3875">CGI Specification</a></li> +<li><a href="#comments_section">Comments</a></li></ul></div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="env" id="env">CGI Environment variables</a></h2> + <p>The server will set the CGI environment variables as described + in the <a href="http://www.ietf.org/rfc/rfc3875">CGI specification</a>, + with the following provisions:</p> + + <dl> + <dt>PATH_INFO</dt> + + <dd>This will not be available if the <code class="directive"><a href="../mod/core.html#acceptpathinfo">AcceptPathInfo</a></code> directive is explicitly set to + <code>off</code>. The default behavior, if <code class="directive">AcceptPathInfo</code> is not given, is that <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code> will accept path info (trailing <code> + /more/path/info</code> following the script filename in the URI), + while the core server will return a 404 NOT FOUND error for requests + with additional path info. Omitting the <code class="directive">AcceptPathInfo</code> directive has the same effect as setting + it <code>On</code> for <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code> requests.</dd> + + <dt>REMOTE_HOST</dt> + + <dd>This will only be set if <code class="directive"><a href="../mod/core.html#hostnamelookups">HostnameLookups</a></code> is set to <code>on</code> (it + is off by default), and if a reverse DNS lookup of the accessing + host's address indeed finds a host name.</dd> + + <dt>REMOTE_IDENT</dt> + + <dd>This will only be set if <code class="directive"><a href="../mod/mod_ident.html#identitycheck">IdentityCheck</a></code> is set to + <code>on</code> and the accessing host supports the ident + protocol. Note that the contents of this variable cannot be + relied upon because it can easily be faked, and if there is a + proxy between the client and the server, it is usually + totally useless.</dd> + + <dt>REMOTE_USER</dt> + + <dd>This will only be set if the CGI script is subject to + authentication.</dd> + + </dl> + <p>This module also leverages the core functions + <a href="https://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__SCRIPT.html#ga0e81f9571a8a73f5da0e89e1f46d34b1">ap_add_common_vars</a> and + <a href="https://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__SCRIPT.html#ga6b975cd7ff27a338cb8752381a4cc14f">ap_add_cgi_vars</a> + to add environment variables like:</p> + <dl> + <dt>DOCUMENT_ROOT</dt> + + <dd>Set with the content of the related <code class="directive"><a href="../mod/core.html#documentroot">DocumentRoot</a></code> directive.</dd> + + <dt>SERVER_NAME</dt> + + <dd>The fully qualified domain name related to the request.</dd> + + <dt>SERVER_ADDR</dt> + + <dd>The IP address of the Virtual Host serving the request.</dd> + + <dt>SERVER_ADMIN</dt> + + <dd>Set with the content of the related <code class="directive"><a href="../mod/core.html#serveradmin">ServerAdmin</a></code> directive.</dd> + </dl> + <p>For an exhaustive list it is suggested to write a basic CGI script + that dumps all the environment variables passed by Apache in a convenient format. + </p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="cgi-debug" id="cgi-debug">CGI Debugging</a></h2> + <p>Debugging CGI scripts has traditionally been difficult, mainly + because it has not been possible to study the output (standard + output and error) for scripts which are failing to run + properly. These directives provide more detailed logging of errors + when they occur.</p> + + <h3>CGI Logfile Format</h3> + <p>When configured, the CGI error log logs any CGI which does not + execute properly. Each CGI script which fails to operate causes + several lines of information to be logged. The first two lines + are always of the format:</p> + + <div class="example"><p><code> + %% [<var>time</var>] <var>request-line</var><br /> + %% <var>HTTP-status</var> <var>CGI-script-filename</var> + </code></p></div> + + <p>If the error is that CGI script cannot be run, the log file + will contain an extra two lines:</p> + + <div class="example"><p><code> + %%error<br /> + <var>error-message</var> + </code></p></div> + + <p>Alternatively, if the error is the result of the script + returning incorrect header information (often due to a bug in + the script), the following information is logged:</p> + + <div class="example"><p><code> + %request<br /> + <var>All HTTP request headers received</var><br /> + <var>POST or PUT entity (if any)</var><br /> + %response<br /> + <var>All headers output by the CGI script</var><br /> + %stdout<br /> + <var>CGI standard output</var><br /> + %stderr<br /> + <var>CGI standard error</var><br /> + </code></p></div> + + <p>(The %stdout and %stderr parts may be missing if the script did + not output anything on standard output or standard error).</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="ScriptLog" id="ScriptLog">ScriptLog</a> <a name="scriptlog" id="scriptlog">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Location of the CGI script error logfile</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ScriptLog <var>file-path</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td><code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>, <code class="module"><a href="../mod/mod_cgid.html">mod_cgid</a></code></td></tr> +</table> + <p>The <code class="directive">ScriptLog</code> directive sets the CGI + script error logfile. If no <code class="directive">ScriptLog</code> is given, + no error log is created. If given, any CGI errors are logged into the + filename given as argument. If this is a relative file or path it is + taken relative to the <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>. + </p> + + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">ScriptLog logs/cgi_log</pre> +</div> + + <p>This log will be opened as the user the child processes run + as, <em>i.e.</em> the user specified in the main <code class="directive"><a href="../mod/mod_unixd.html#user">User</a></code> directive. This means that + either the directory the script log is in needs to be writable + by that user or the file needs to be manually created and set + to be writable by that user. If you place the script log in + your main logs directory, do <strong>NOT</strong> change the + directory permissions to make it writable by the user the child + processes run as.</p> + + <p>Note that script logging is meant to be a debugging feature + when writing CGI scripts, and is not meant to be activated + continuously on running servers. It is not optimized for speed + or efficiency, and may have security problems if used in a + manner other than that for which it was designed.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="ScriptLogBuffer" id="ScriptLogBuffer">ScriptLogBuffer</a> <a name="scriptlogbuffer" id="scriptlogbuffer">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maximum amount of PUT or POST requests that will be recorded +in the scriptlog</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ScriptLogBuffer <var>bytes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ScriptLogBuffer 1024</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td><code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>, <code class="module"><a href="../mod/mod_cgid.html">mod_cgid</a></code></td></tr> +</table> + <p>The size of any PUT or POST entity body that is logged to + the file is limited, to prevent the log file growing too big + too quickly if large bodies are being received. By default, up + to 1024 bytes are logged, but this can be changed with this + directive.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="ScriptLogLength" id="ScriptLogLength">ScriptLogLength</a> <a name="scriptloglength" id="scriptloglength">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Size limit of the CGI script logfile</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ScriptLogLength <var>bytes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ScriptLogLength 10385760</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td><code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>, <code class="module"><a href="../mod/mod_cgid.html">mod_cgid</a></code></td></tr> +</table> + <p><code class="directive">ScriptLogLength</code> can be used to limit the + size of the CGI script logfile. Since the logfile logs a lot of + information per CGI error (all request headers, all script output) + it can grow to be a big file. To prevent problems due to unbounded + growth, this directive can be used to set an maximum file-size for + the CGI logfile. If the file exceeds this size, no more + information will be written to it.</p> + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_cgi.html" title="English"> en </a> | +<a href="../fr/mod/mod_cgi.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | +<a href="../ja/mod/mod_cgi.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | +<a href="../ko/mod/mod_cgi.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> +</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_cgi.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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