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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 2.3</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/">Documentation</a> &gt; <a href="../">Version 2.3</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="../fr/mod/mod_info.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
  26 <a href="../ja/mod/mod_info.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
  27 <a href="../ko/mod/mod_info.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
  28 </div>
  29 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides a comprehensive overview of the server
  30 configuration</td></tr>
  31 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  32 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>info_module</td></tr>
  33 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_info.c</td></tr></table>
  34 <h3>Summary</h3>
  35
  36     <p>To configure <code class="module"><a href="../mod/mod_info.html">mod_info</a></code>, add the following to your
  37     <code>httpd.conf</code> file.</p>
  38
  39     <div class="example"><p><code>
  40       &lt;Location /server-info&gt;<br />
  41       <span class="indent">
  42         SetHandler server-info<br />
  43       </span>
  44       &lt;/Location&gt;
  45     </code></p></div>
  46
  47     <p>You may wish to use <code class="module"><a href="../mod/mod_access.html">mod_access</a></code> inside the
  48     <code class="directive"><a href="../mod/core.html#location">&lt;Location&gt;</a></code>
  49     directive to limit access to your server configuration
  50     information:</p>
  51
  52     <div class="example"><p><code>
  53       &lt;Location /server-info&gt;<br />
  54       <span class="indent">
  55         SetHandler server-info<br />
  56         Require host yourcompany.com<br />
  57       </span>
  58       &lt;/Location&gt;
  59     </code></p></div>
  60
  61     <p>Once configured, the server information is obtained by
  62     accessing <code>http://your.host.example.com/server-info</code></p>
  63 </div>
  64 <div id="quickview"><h3 class="directives">Directives</h3>
  65 <ul id="toc">
  66 <li><img alt="" src="../images/down.gif" /> <a href="#addmoduleinfo">AddModuleInfo</a></li>
  67 </ul>
  68 <h3>Topics</h3>
  69 <ul id="topics">
  70 <li><img alt="" src="../images/down.gif" /> <a href="#security">Security Issues</a></li>
  71 <li><img alt="" src="../images/down.gif" /> <a href="#queries">Selecting the information shown</a></li>
  72 <li><img alt="" src="../images/down.gif" /> <a href="#limitations">Known Limitations</a></li>
  73 </ul></div>
  74 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  75 <div class="section">
  76 <h2><a name="security" id="security">Security Issues</a></h2>
  77     <p>Once <code class="module"><a href="../mod/mod_info.html">mod_info</a></code> is loaded into the server, its
  78     handler capability is available in <em>all</em> configuration
  79     files, including per-directory files (<em>e.g.</em>,
  80     <code>.htaccess</code>). This may have security-related
  81     ramifications for your site.</p>
  82
  83     <p>In particular, this module can leak sensitive information
  84     from the configuration directives of other Apache modules such as
  85     system paths, usernames/passwords, database names, etc. Therefore,
  86     this module should <strong>only</strong> be
  87     used in a controlled environment and always with caution.</p>
  88
  89     <p>You will probably want to use <code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</a></code>
  90     to limit access to your server configuration information.</p>
  91
  92     <div class="example"><h3>Access control</h3><p><code>
  93       &lt;Location /server-info&gt;<br />
  94       <span class="indent">
  95         SetHandler server-info<br />
  96         Order allow,deny<br />
  97         # Allow access from server itself<br />
  98         Allow from 127.0.0.1<br />
  99         # Additionally, allow access from local workstation<br />
 100         Allow from 192.168.1.17<br />
 101       </span>
 102       &lt;/Location&gt;
 103     </code></p></div>
 104 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 105 <div class="section">
 106 <h2><a name="queries" id="queries">Selecting the information shown</a></h2>
 107     <p>By default, the server information includes a list of
 108     all enabled modules, and for each module, a description of
 109     the directives understood by that module, the hooks implemented
 110     by that module, and the relevant directives from the current
 111     configuration.</p>
 112
 113     <p>Other views of the configuration information are available by
 114     appending a query to the <code>server-info</code> request. For
 115     example, <code>http://your.host.example.com/server-info?config</code>
 116     will show all configuration directives.</p>
 117
 118     <dl>
 119         <dt><code>?&lt;module-name&gt;</code></dt>
 120             <dd>Only information relevant to the named module</dd>
 121         <dt><code>?config</code></dt>
 122             <dd>Just the configuration directives, not sorted by module</dd>
 123         <dt><code>?hooks</code></dt>
 124             <dd>Only the list of Hooks each module is attached to</dd>
 125         <dt><code>?list</code></dt>
 126             <dd>Only a simple list of enabled modules</dd>
 127         <dt><code>?server</code></dt>
 128             <dd>Only the basic server information</dd>
 129     </dl>
 130 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 131 <div class="section">
 132 <h2><a name="limitations" id="limitations">Known Limitations</a></h2>
 133     <p><code class="module"><a href="../mod/mod_info.html">mod_info</a></code> provides its information by reading the
 134     parsed configuration, rather than reading the original configuration
 135     file. There are a few limitations as a result of the way the parsed
 136     configuration tree is created:</p>
 137     <ul>
 138       <li>Directives which are executed immediately rather than being
 139           stored in the parsed configuration are not listed. These include
 140           <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>,
 141           <code class="directive"><a href="../mod/mod_so.html#loadmodule">LoadModule</a></code>, and
 142           <code class="directive"><a href="../mod/mod_so.html#loadfile">LoadFile</a></code>.</li>
 143       <li>Directives which control the configuration file itself, such as
 144           <code class="directive"><a href="../mod/core.html#include">Include</a></code>,
 145           <code class="directive"><a href="../mod/core.html#&lt;ifmodule&gt;">&lt;IfModule&gt;</a></code> and
 146           <code class="directive"><a href="../mod/core.html#&lt;ifdefine&gt;">&lt;IfDefine&gt;</a></code> are not
 147           listed, but the included configuration directives are.</li>
 148       <li>Comments are not listed. (This may be considered a feature.)</li>
 149       <li>Configuration directives from <code>.htaccess</code> files are
 150           not listed (since they do not form part of the permanent server
 151           configuration).</li>
 152       <li>Container directives such as
 153           <code class="directive"><a href="../mod/core.html#&lt;directory&gt;">&lt;Directory&gt;</a></code>
 154           are listed normally, but <code class="module"><a href="../mod/mod_info.html">mod_info</a></code> cannot figure
 155           out the line number for the closing
 156           <code class="directive"><a href="../mod/core.html#&lt;/directory&gt;">&lt;/Directory&gt;</a></code>.</li>
 157       <li>Directives generated by third party modules such as <a href="http://perl.apache.org">mod_perl</a>
 158           might not be listed.</li>
 159     </ul>
 160 </div>
 161 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 162 <div class="directive-section"><h2><a name="AddModuleInfo" id="AddModuleInfo">AddModuleInfo</a> <a name="addmoduleinfo" id="addmoduleinfo">Directive</a></h2>
 163 <table class="directive">
 164 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Adds additional information to the module
 165 information displayed by the server-info handler</td></tr>
 166 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AddModuleInfo <var>module-name</var> <var>string</var></code></td></tr>
 167 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
 168 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 169 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_info</td></tr>
 170 </table>
 171     <p>This allows the content of <var>string</var> to be shown as
 172     HTML interpreted, <strong>Additional Information</strong> for
 173     the module <var>module-name</var>. Example:</p>
 174
 175     <div class="example"><p><code>
 176       AddModuleInfo mod_deflate.c 'See &lt;a \<br />
 177       <span class="indent">
 178         href="http://www.apache.org/docs/trunk/mod/mod_deflate.html"&gt;\<br />
 179         http://www.apache.org/docs/trunk/mod/mod_deflate.html&lt;/a&gt;'
 180       </span>
 181     </code></p></div>
 182
 183 </div>
 184 </div>
 185 <div class="bottomlang">
 186 <p><span>Available Languages: </span><a href="../en/mod/mod_info.html" title="English">&nbsp;en&nbsp;</a> |
 187 <a href="../fr/mod/mod_info.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
 188 <a href="../ja/mod/mod_info.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
 189 <a href="../ko/mod/mod_info.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
 190 </div><div id="footer">
 191 <p class="apache">Copyright 2010 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>
 192 <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></div>
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