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<modulesynopsis metafile="mod_info.xml.meta">

<name>mod_info</name>
<description>Provides a comprehensive overview of the server
configuration</description>
<status>Extension</status>
<sourcefile>mod_info.c</sourcefile>
<identifier>info_module</identifier>

<summary>
    <p>To configure <module>mod_info</module>, add the following to your
    <code>httpd.conf</code> file.</p>

    <example>
      &lt;Location /server-info&gt;<br />
      <indent>
        SetHandler server-info<br />
      </indent>
      &lt;/Location&gt;
    </example>

    <p>You may wish to use <module>mod_authz_host</module> inside the
    <directive type="section" module="core">Location</directive>
    directive to limit access to your server configuration
    information:</p>

    <example>
      &lt;Location /server-info&gt;<br />
      <indent>
        SetHandler server-info<br />
        Order deny,allow<br />
        Deny from all<br />
        Allow from yourcompany.com<br />
      </indent>
      &lt;/Location&gt;
    </example>

    <p>Once configured, the server information is obtained by
    accessing <code>http://your.host.example.com/server-info</code></p>
</summary>

<section id="security"><title>Security Issues</title>
    <p>Once <module>mod_info</module> is loaded into the server, its
    handler capability is available in <em>all</em> configuration
    files, including per-directory files (<em>e.g.</em>,
    <code>.htaccess</code>). This may have security-related
    ramifications for your site.</p>

    <p>In particular, this module can leak sensitive information
    from the configuration directives of other Apache modules such as
    system paths, usernames/passwords, database names, etc. Therefore,
    this module should <strong>only</strong> be
    used in a controlled environment and always with caution.</p>

    <p>You will probably want to use <module>mod_authz_host</module> 
    to limit access to your server configuration information.</p>
      
    <example><title>Access control</title>
      &lt;Location /server-info&gt;<br />
      <indent>
        SetHandler server-info<br />
        Order allow,deny<br />
        # Allow access from server itself<br />
        Allow from 127.0.0.1<br />
        # Additionally, allow access from local workstation<br />
        Allow from 192.168.1.17<br />
      </indent>
      &lt;/Location&gt;
    </example>
</section>

<section id="queries"><title>Selecting the information shown</title>
    <p>By default, the server information includes a list of
    all enabled modules, and for each module, a description of
    the directives understood by that module, the hooks implemented
    by that module, and the relevant directives from the current
    configuration.</p>
    
    <p>Other views of the configuration information are available by
    appending a query to the <code>server-info</code> request. For
    example, <code>http://your.host.example.com/server-info?config</code>
    will show all configuration directives.</p>
    
    <dl>
        <dt><code>?&lt;module-name&gt;</code></dt>
            <dd>Only information relevant to the named module</dd>
        <dt><code>?config</code></dt>
            <dd>Just the configuration directives, not sorted by module</dd>
        <dt><code>?hooks</code></dt>
            <dd>Only the list of Hooks each module is attached to</dd>
        <dt><code>?list</code></dt>
            <dd>Only a simple list of enabled modules</dd>
        <dt><code>?server</code></dt>
            <dd>Only the basic server information</dd>
    </dl>
</section>

<section id="limitations"><title>Known Limitations</title>
    <p><module>mod_info</module> provides its information by reading the
    parsed configuration, rather than reading the original configuration
    file. There are a few limitations as a result of the way the parsed
    configuration tree is created:</p>
    <ul>
      <li>Directives which are executed immediately rather than being
          stored in the parsed configuration are not listed. These include
          <directive module="core">ServerRoot</directive>,
          <directive module="mod_so">LoadModule</directive>, and
          <directive module="mod_so">LoadFile</directive>.</li>
      <li>Directives which control the configuration file itself, such as
          <directive module="core">Include</directive>,
          <directive module="core">&lt;IfModule&gt;</directive> and
          <directive module="core">&lt;IfDefine&gt;</directive> are not
          listed, but the included configuration directives are.</li>
      <li>Comments are not listed. (This may be considered a feature.)</li>
      <li>Configuration directives from <code>.htaccess</code> files are
          not listed (since they do not form part of the permanent server
          configuration).</li>
      <li>Container directives such as
          <directive module="core">&lt;Directory&gt;</directive>
          are listed normally, but <module>mod_info</module> cannot figure
          out the line number for the closing
          <directive module="core">&lt;/Directory&gt;</directive>.</li>
      <li>Directives generated by third party modules such as
          <a href="http://perl.apache.org">mod_perl</a>
          might not be listed.</li>
    </ul>
</section>

<directivesynopsis>
<name>AddModuleInfo</name>
<description>Adds additional information to the module
information displayed by the server-info handler</description>
<syntax>AddModuleInfo <var>module-name</var> <var>string</var></syntax>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>
<compatibility>Apache 1.3 and above</compatibility>

<usage>
    <p>This allows the content of <var>string</var> to be shown as
    HTML interpreted, <strong>Additional Information</strong> for
    the module <var>module-name</var>. Example:</p>

    <example>
      AddModuleInfo mod_deflate.c 'See &lt;a \<br />
      <indent>
        href="http://www.apache.org/docs/&httpd.docs;/mod/mod_deflate.html"&gt;\<br />
        http://www.apache.org/docs/&httpd.docs;/mod/mod_deflate.html&lt;/a&gt;'
      </indent>
    </example>
</usage>

</directivesynopsis>
</modulesynopsis>
