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<title>Class: Rack::CommonLogger</title>
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<td><strong>Class</strong></td>
<td class="class-name-in-header">Rack::CommonLogger</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../../files/lib/rack/commonlogger_rb.html">
lib/rack/commonlogger.rb
</a>
<br />
</td>
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<td><strong>Parent:</strong></td>
<td>
Object
</td>
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<p>
<a href="CommonLogger.html">Rack::CommonLogger</a> forwards every request
to the given <tt>app</tt>, and logs a line in the <a
href="http://httpd.apache.org/docs/1.3/logs.html#common">Apache common log
format</a> to the <tt>logger</tt>.
</p>
<p>
If <tt>logger</tt> is nil, <a href="CommonLogger.html">CommonLogger</a>
will fall back +rack.errors+, which is an instance of <a
href="NullLogger.html">Rack::NullLogger</a>.
</p>
<p>
<tt>logger</tt> can be any class, including the standard library <a
href="Logger.html">Logger</a>, and is expected to have either
<tt>write</tt> or +<<+ method, which accepts the
CommonLogger::FORMAT. According to the SPEC, the error stream must also
respond to <tt>puts</tt> (which takes a single argument that responds to
<tt>to_s</tt>), and <tt>flush</tt> (which is called without arguments in
order to make the error appear for sure)
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<a href="#M000191">call</a>
<a href="#M000190">new</a>
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<h3 class="section-bar">Constants</h3>
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<td class="context-item-name">FORMAT</td>
<td>=</td>
<td class="context-item-value">%{%s - %s [%s] "%s %s%s %s" %d %s %0.4f\n}</td>
<td width="3em"> </td>
<td class="context-item-desc">
Common Log Format: <a
href="http://httpd.apache.org/docs/1.3/logs.html#common">httpd.apache.org/docs/1.3/logs.html#common</a>
<pre>
lilith.local - - [07/Aug/2006 23:58:02 -0400] "GET / HTTP/1.1" 500 -
%{%s - %s [%s] "%s %s%s %s" %d %s\n} %
</pre>
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<span class="method-name">new</span><span class="method-args">(app, logger=nil)</span>
</a>
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</div>
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<h3 class="section-bar">Public Instance methods</h3>
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<span class="method-name">call</span><span class="method-args">(env)</span>
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