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diff --git a/APACHE_1_3_42/htdocs/manual/mod/mod_cgi.html.en b/APACHE_1_3_42/htdocs/manual/mod/mod_cgi.html.en new file mode 100644 index 0000000000..d87c3675b3 --- /dev/null +++ b/APACHE_1_3_42/htdocs/manual/mod/mod_cgi.html.en @@ -0,0 +1,218 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> + +<html xmlns="http://www.w3.org/1999/xhtml"> + <head> + <meta name="generator" content="HTML Tidy, see www.w3.org" /> + + <title>Apache module mod_cgi</title> + </head> + <!-- Background white, links blue (unvisited), navy (visited), red (active) --> + + <body bgcolor="#FFFFFF" text="#000000" link="#0000FF" + vlink="#000080" alink="#FF0000"> + <!--#include virtual="header.html" --> + + <h1 align="CENTER">Module mod_cgi</h1> + + <p>This module provides for execution of CGI scripts.</p> + + <p><a href="module-dict.html#Status" + rel="Help"><strong>Status:</strong></a> Base<br /> + <a href="module-dict.html#SourceFile" + rel="Help"><strong>Source File:</strong></a> mod_cgi.c<br /> + <a href="module-dict.html#ModuleIdentifier" + rel="Help"><strong>Module Identifier:</strong></a> + cgi_module</p> + + <h2>Summary</h2> + <!-- XXX: Should have references to CGI definition/RFC --> + Any file that has the mime type + <code>application/x-httpd-cgi</code> or handler + <code>cgi-script</code> (Apache 1.1 or later) will be treated + as a CGI script, and run by the server, with its output being + returned to the client. Files acquire this type either by + having a name containing an extension defined by the <a + href="mod_mime.html#addtype">AddType</a> directive, or by being + in a <a href="mod_alias.html#scriptalias">ScriptAlias</a> + directory. Files that are not in a <a + href="mod_alias.html#scriptalias">ScriptAlias</a> directory, + but which are of type <code>application/x-httpd-cgi</code> by + virtue of an <code>AddType</code> directive, will still not be + executed by the server unless <code>Options ExecCGI</code> is + enabled. See the <a + href="core.html#options"><code>Options</code></a> directive for + more details. + + <p>When the server invokes a CGI script, it will add a variable + called <code>DOCUMENT_ROOT</code> to the environment. This + variable will contain the value of the <a + href="core.html#documentroot">DocumentRoot</a> configuration + variable.</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> + + <h2>Directives</h2> + + <ul> + <li><a href="#scriptlog">ScriptLog</a></li> + + <li><a href="#scriptloglength">ScriptLogLength</a></li> + + <li><a href="#scriptlogbuffer">ScriptLogBuffer</a></li> + </ul> + + <p>See also: <a href="core.html#options">Options</a>, <a + href="mod_alias.html#scriptalias">ScriptAlias</a>, <a + href="mod_mime.html#addtype">AddType</a> and <a + href="mod_mime.html#addhandler">AddHandler</a>.</p> + + <h2>CGI Environment variables</h2> + The server will set the CGI environment variables as described + in the <a href="http://hoohoo.ncsa.uiuc.edu/cgi/">CGI + specification</a>, with the following provisions: + + <dl> + <dt>REMOTE_HOST</dt> + + <dd>This will only be set if <a + href="core.html#hostnamelookups"><code>HostnameLookups</code></a> + 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 <a + href="core.html#identitycheck">IdentityCheck</a> 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> + + <h2><a id="cgi_debug" name="cgi_debug">CGI Debugging</a></h2> + 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, included in Apache 1.2 and later, + provide more detailed logging of errors when they occur. + + <h2>CGI Logfile Format</h2> + 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: +<pre> + %% [<em>time</em>] <em>request-line</em> + %% <em>HTTP-status</em> <em>CGI-script-filename</em> +</pre> + If the error is that CGI script cannot be run, the log file + will contain an extra two lines: +<pre> + %%error + <em>error-message</em> +</pre> + 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: +<pre> + %request + <em>All HTTP request headers received</em> + <em>POST or PUT entity (if any)</em> + %response + <em>All headers output by the CGI script</em> + %stdout + <em>CGI standard output</em> + %stderr + <em>CGI standard error</em> +</pre> + (The %stdout and %stderr parts may be missing if the script did + not output anything on standard output or standard error). + <hr /> + + <h3><a id="scriptlog" name="scriptlog">ScriptLog</a> + directive</h3> + <a href="directive-dict.html#Syntax" + rel="Help"><strong>Syntax:</strong></a> ScriptLog + <em>filename</em><br /> + <a href="directive-dict.html#Default" + rel="Help"><strong>Default:</strong></a> none<br /> + <a href="directive-dict.html#Context" + rel="Help"><strong>Context:</strong></a> server config<br /> + <a href="directive-dict.html#Status" + rel="Help"><strong>Status:</strong></a> mod_cgi + + <p>The <tt>ScriptLog</tt> directive sets the CGI script error + logfile. If no ScriptLog 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 server root.</p> + + <p>This log will be opened as the user the child processes run + as, ie. the user specified in the main <a + href="core.html#user">User</a> 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> + <hr /> + + <h3><a id="scriptloglength" + name="scriptloglength">ScriptLogLength</a> directive</h3> + <a href="directive-dict.html#Syntax" + rel="Help"><strong>Syntax:</strong></a> ScriptLogLength + <em>bytes</em><br /> + <a href="directive-dict.html#Default" + rel="Help"><strong>Default:</strong></a> 10385760<br /> + <a href="directive-dict.html#Context" + rel="Help"><strong>Context:</strong></a> server config<br /> + <a href="directive-dict.html#Status" + rel="Help"><strong>Status:</strong></a> mod_cgi + + <p><tt>ScriptLogLength</tt> 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> + <hr /> + + <h3><a id="scriptlogbuffer" + name="scriptlogbuffer">ScriptLogBuffer</a></h3> + <a href="directive-dict.html#Syntax" + rel="Help"><strong>Syntax:</strong></a> ScriptLogBuffer + <em>bytes</em><br /> + <a href="directive-dict.html#Default" + rel="Help"><strong>Default:</strong></a> 1024<br /> + <a href="directive-dict.html#Context" + rel="Help"><strong>Context:</strong></a> server config<br /> + <a href="directive-dict.html#Status" + rel="Help"><strong>Status:</strong></a> mod_cgi + + <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. <!--#include virtual="footer.html" --> + </p> + </body> +</html> + |