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   8 <title>mod_logio - Apache HTTP Server</title>
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  21 <div id="page-content">
  22 <div id="preamble"><h1>Apache Module mod_logio</h1>
  23 <div class="toplang">
  24 <p><span>Available Languages: </span><a href="../en/mod/mod_logio.html" title="English">&nbsp;en&nbsp;</a> |
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  28 </div>
  29 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Logging of input and output bytes per request</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>logio_module</td></tr>
  32 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_logio.c</td></tr></table>
  33 <h3>Summary</h3>
  34
  35
  36     <p>This module provides the logging of input and output number of
  37     bytes received/sent per request. The numbers reflect the actual bytes
  38     as received on the network, which then takes into account the
  39     headers and bodies of requests and responses. The counting is done
  40     before SSL/TLS on input and after SSL/TLS on output, so the numbers
  41     will correctly reflect any changes made by encryption.</p>
  42
  43     <p>This module requires <code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code>.</p>
  44
  45 </div>
  46 <div id="quickview"><h3 class="directives">Directives</h3>
  47 <p>This module provides no directives.</p>
  48 <h3>Topics</h3>
  49 <ul id="topics">
  50 <li><img alt="" src="../images/down.gif" /> <a href="#formats">Custom Log Formats</a></li>
  51 </ul><h3>See also</h3>
  52 <ul class="seealso">
  53 <li><code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code></li>
  54 <li><a href="../logs.html">Apache Log Files</a></li>
  55 </ul></div>
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  57 <div class="section">
  58 <h2><a name="formats" id="formats">Custom Log Formats</a></h2>
  59
  60
  61     <p>This modules adds two new logging directives. The characteristics of the
  62     request itself are logged by placing "<code>%</code>" directives in
  63     the format string, which are replaced in the log file by the values as
  64     follows:</p>
  65
  66     <table class="bordered"><tr class="header"><th>Format&nbsp;String</th>
  67         <th>Description</th></tr>
  68 <tr><td><code>%...I</code></td>
  69         <td>Bytes received, including request and headers, cannot be
  70         zero.</td></tr>
  71 <tr class="odd"><td><code>%...O</code></td>
  72         <td>Bytes sent, including headers, cannot be zero.</td></tr>
  73 </table>
  74
  75     <p>Usually, the functionality is used like this:</p>
  76
  77     <dl>
  78       <dt>Combined I/O log format:</dt>
  79       <dd><code>"%h %l %u %t \"%r\" %&gt;s %b \"%{Referer}i\"
  80       \"%{User-agent}i\" %I %O"</code></dd>
  81     </dl>
  82 </div>
  83 </div>
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  90 <p class="apache">Copyright 2009 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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