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<div id="preamble"><h1>Apache Module mod_usertrack</h1>
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<p><span>Available Languages: </span><a href="../en/mod/mod_usertrack.html" title="English"> en </a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>
<em>Clickstream</em> logging of user activity on a site
</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module營dentifier:</a></th><td>usertrack_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source燜ile:</a></th><td>mod_usertrack.c</td></tr></table>
<h3>Summary</h3>
<p>Previous releases of Apache have included a module which
generates a 'clickstream' log of user activity on a site using
cookies. This was called the "cookies" module, mod_cookies. In
Apache 1.2 and later this module has been renamed the "user
tracking" module, mod_usertrack. This module has been
simplified and new directives added.</p>
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<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#cookiedomain">CookieDomain</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cookieexpires">CookieExpires</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cookiename">CookieName</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cookiestyle">CookieStyle</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cookietracking">CookieTracking</a></li>
</ul>
<h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#logging">Logging</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cookiedate">2-digit or 4-digit dates for cookies?</a></li>
</ul></div>
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<h2><a name="logging" id="logging">Logging</a></h2>
<p>Previously, the cookies module (now the user tracking
module) did its own logging, using the <code class="directive">CookieLog</code>
directive. In this release, this module does no logging at all.
Instead, a configurable log format file should be used to log
user click-streams. This is possible because the logging module
now allows multiple log files. The cookie itself is logged by
using the text <code>%{cookie}n</code> in the log file format. For
example:</p>
<div class="example"><p><code>
CustomLog logs/clickstream "%{cookie}n %r %t"
</code></p></div>
<p>For backward compatibility the configurable log module
implements the old <code class="directive"><a href="../mod/mod_log_config.html#cookielog">CookieLog</a></code> directive, but this
should be upgraded to the above <code class="directive"><a href="../mod/mod_log_config.html#customlog">CustomLog</a></code> directive. </p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="cookiedate" id="cookiedate">2-digit or 4-digit dates for cookies?</a></h2>
<p>(the following is from message
<022701bda43d$9d32bbb0$1201a8c0@christian.office.sane.com>
in the new-httpd archives) </p>
<pre>
From: "Christian Allen" <christian@sane.com>
Subject: Re: Apache Y2K bug in mod_usertrack.c
Date: Tue, 30 Jun 1998 11:41:56 -0400
Did some work with cookies and dug up some info that might be useful.
True, Netscape claims that the correct format NOW is four digit dates, and
four digit dates do in fact work... for Netscape 4.x (Communicator), that
is. However, 3.x and below do NOT accept them. It seems that Netscape
originally had a 2-digit standard, and then with all of the Y2K hype and
probably a few complaints, changed to a four digit date for Communicator.
Fortunately, 4.x also understands the 2-digit format, and so the best way to
ensure that your expiration date is legible to the client's browser is to
use 2-digit dates.
However, this does not limit expiration dates to the year 2000; if you use
an expiration year of "13", for example, it is interpreted as 2013, NOT
1913! In fact, you can use an expiration year of up to "37", and it will be
understood as "2037" by both MSIE and Netscape versions 3.x and up (not sure
about versions previous to those). Not sure why Netscape used that
particular year as its cut-off point, but my guess is that it was in respect
to UNIX's 2038 problem. Netscape/MSIE 4.x seem to be able to understand
2-digit years beyond that, at least until "50" for sure (I think they
understand up until about "70", but not for sure).
Summary: Mozilla 3.x and up understands two digit dates up until "37"
(2037). Mozilla 4.x understands up until at least "50" (2050) in 2-digit
form, but also understands 4-digit years, which can probably reach up until
9999. Your best bet for sending a long-life cookie is to send it for some
time late in the year "37".
</pre>
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<div class="directive-section"><h2><a name="CookieDomain" id="CookieDomain">CookieDomain</a> <a name="cookiedomain" id="cookiedomain">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The domain to which the tracking cookie applies</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CookieDomain <em>domain</em></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_usertrack</td></tr>
</table>
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