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   8 <title>mod_info - Apache HTTP Server</title>
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  15 <p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
  16 <p class="apache">Apache HTTP Server Version 2.1</p>
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  20 <a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs-project/">Documentation</a> &gt; <a href="../">Version 2.1</a> &gt; <a href="./">Modules</a></div>
  21 <div id="page-content">
  22 <div id="preamble"><h1>Apache Module mod_info</h1>
  23 <div class="toplang">
  24 <p><span>Available Languages: </span><a href="../en/mod/mod_info.html" title="English">&nbsp;en&nbsp;</a> |
  25 <a href="../ja/mod/mod_info.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
  26 <a href="../ko/mod/mod_info.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
  27 </div>
  28 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides a comprehensive overview of the server
  29 configuration</td></tr>
  30 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  31 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>info_module</td></tr>
  32 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_info.c</td></tr></table>
  33 <h3>Summary</h3>
  34
  35     <p>To configure <code class="module"><a href="../mod/mod_info.html">mod_info</a></code>, add the following to your
  36     <code>httpd.conf</code> file.</p>
  37
  38     <div class="example"><p><code>
  39       &lt;Location /server-info&gt;<br />
  40       <span class="indent">
  41         SetHandler server-info<br />
  42       </span>
  43       &lt;/Location&gt;
  44     </code></p></div>
  45
  46     <p>Once configured, the server information is obtained by
  47     accessing <code>http://your.host.example.com/server-info</code></p>
  48 </div>
  49 <div id="quickview"><h3 class="directives">Directives</h3>
  50 <ul id="toc">
  51 <li><img alt="" src="../images/down.gif" /> <a href="#addmoduleinfo">AddModuleInfo</a></li>
  52 </ul>
  53 <h3>Topics</h3>
  54 <ul id="topics">
  55 <li><img alt="" src="../images/down.gif" /> <a href="#security">Security Issues</a></li>
  56 <li><img alt="" src="../images/down.gif" /> <a href="#queries">Selecting the information shown</a></li>
  57 <li><img alt="" src="../images/down.gif" /> <a href="#limitations">Known Limitations</a></li>
  58 </ul></div>
  59 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  60 <div class="section">
  61 <h2><a name="security" id="security">Security Issues</a></h2>
  62     <p>Once <code class="module"><a href="../mod/mod_info.html">mod_info</a></code> is loaded into the server, its
  63     handler capability is available in <em>all</em> configuration
  64     files, including per-directory files (<em>e.g.</em>,
  65     <code>.htaccess</code>). This may have security-related
  66     ramifications for your site.</p>
  67
  68     <p>In particular, this module can leak sensitive information
  69     from the configuration directives of other Apache modules such as
  70     system paths, usernames/passwords, database names, etc. Therefore,
  71     this module should <strong>only</strong> be
  72     used in a controlled environment and always with caution.</p>
  73
  74     <p>You will probably want to use <code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</a></code>
  75     to limit access to your server configuration information.</p>
  76
  77     <div class="example"><h3>Access control</h3><p><code>
  78       &lt;Location /server-info&gt;<br />
  79       <span class="indent">
  80         SetHandler server-info<br />
  81         Order allow,deny<br />
  82         # Allow access from server itself<br />
  83         Allow from 127.0.0.1<br />
  84         # Additionally, allow access from local workstation<br />
  85         Allow from 192.168.1.17<br />
  86       </span>
  87       &lt;/Location&gt;
  88     </code></p></div>
  89 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  90 <div class="section">
  91 <h2><a name="queries" id="queries">Selecting the information shown</a></h2>
  92     <p>By default, the server information includes a list of
  93     all enabled modules, and for each module, a description of
  94     the directives understood by that module, the hooks implemented
  95     by that module, and the relevant directives from the current
  96     configuration.</p>
  97
  98     <p>Other views of the configuration information are available by
  99     appending a query to the <code>server-info</code> request. For
 100     example, <code>http://your.host.example.com/server-info?config</code>
 101     will show all configuration directives.</p>
 102
 103     <dl>
 104         <dt><code>?&lt;module-name&gt;</code></dt>
 105             <dd>Only information relevant to the named module</dd>
 106         <dt><code>?config</code></dt>
 107             <dd>Just the configuration directives, not sorted by module</dd>
 108         <dt><code>?hooks</code></dt>
 109             <dd>Only the list of Hooks each module is attached to</dd>
 110         <dt><code>?list</code></dt>
 111             <dd>Only a simple list of enabled modules</dd>
 112         <dt><code>?server</code></dt>
 113             <dd>Only the basic server information</dd>
 114     </dl>
 115 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 116 <div class="section">
 117 <h2><a name="limitations" id="limitations">Known Limitations</a></h2>
 118     <p><code class="module"><a href="../mod/mod_info.html">mod_info</a></code> provides its information by reading the
 119     parsed configuration, rather than reading the original configuration
 120     file. There are a few limitations as a result of the way the parsed
 121     configuration tree is created:</p>
 122     <ul>
 123       <li>Directives which are executed immediately rather than being
 124           stored in the parsed configuration are not listed. These include
 125           <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>,
 126           <code class="directive"><a href="../mod/mod_so.html#loadmodule">LoadModule</a></code>, and
 127           <code class="directive"><a href="../mod/mod_so.html#loadfile">LoadFile</a></code>.</li>
 128       <li>Directives which control the configuration file itself, such as
 129           <code class="directive"><a href="../mod/core.html#include">Include</a></code>,
 130           <code class="directive"><a href="../mod/core.html#&lt;ifmodule&gt;">&lt;IfModule&gt;</a></code> and
 131           <code class="directive"><a href="../mod/core.html#&lt;ifdefine&gt;">&lt;IfDefine&gt;</a></code> are not
 132           listed, but the included configuration directives are.</li>
 133       <li>Comments are not listed. (This may be considered a feature.)</li>
 134       <li>Configuration directives from <code>.htaccess</code> files are
 135           not listed (since they do not form part of the permanent server
 136           configuration).</li>
 137       <li>Container directives such as
 138           <code class="directive"><a href="../mod/core.html#&lt;directory&gt;">&lt;Directory&gt;</a></code>
 139           are listed normally, but <code class="module"><a href="../mod/mod_info.html">mod_info</a></code> cannot figure
 140           out the line number for the closing
 141           <code class="directive"><a href="../mod/core.html#&lt;/directory&gt;">&lt;/Directory&gt;</a></code>.</li>
 142       <li>Directives generated by third party modules such as <code class="module"><a href="../mod/mod_perl.html">mod_perl</a></code>
 143           might not be listed.</li>
 144     </ul>
 145 </div>
 146 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 147 <div class="directive-section"><h2><a name="AddModuleInfo" id="AddModuleInfo">AddModuleInfo</a> <a name="addmoduleinfo" id="addmoduleinfo">Directive</a></h2>
 148 <table class="directive">
 149 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Adds additional information to the module
 150 information displayed by the server-info handler</td></tr>
 151 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AddModuleInfo <var>module-name</var> <var>string</var></code></td></tr>
 152 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
 153 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 154 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_info</td></tr>
 155 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Apache 1.3 and above</td></tr>
 156 </table>
 157     <p>This allows the content of <var>string</var> to be shown as
 158     HTML interpreted, <strong>Additional Information</strong> for
 159     the module <var>module-name</var>. Example:</p>
 160
 161     <div class="example"><p><code>
 162       AddModuleInfo mod_deflate.c 'See &lt;a \<br />
 163       <span class="indent">
 164         href="http://www.apache.org/docs-2.1/mod/mod_deflate.html"&gt;\<br />
 165         http://www.apache.org/docs-2.1/mod/mod_deflate.html&lt;/a&gt;'
 166       </span>
 167     </code></p></div>
 168
 169 </div>
 170 </div>
 171 <div class="bottomlang">
 172 <p><span>Available Languages: </span><a href="../en/mod/mod_info.html" title="English">&nbsp;en&nbsp;</a> |
 173 <a href="../ja/mod/mod_info.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
 174 <a href="../ko/mod/mod_info.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
 175 </div><div id="footer">
 176 <p class="apache">Copyright 1999-2004 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>
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