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<p>If you are serving a long document from an Apache web server, we recommend you make
the following additions or changes to your <code class="filename">httpd.conf</code> or
<code class="filename">.htaccess</code> file. <em><span class="remark">TODO: Explain what each thing
does.</span></em></p><pre class="programlisting">AddDefaultCharSet UTF-8 # <a id="AddDefaultCharSet"></a><span><img src="../common/images/callouts/1.png" alt="1" border="0"></img></span>
# 480 weeks
&lt;FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$"&gt; # <a id="CachingSettings"></a><span><img src="../common/images/callouts/2.png" alt="2" border="0"></img></span>
Header set Cache-Control "max-age=290304000, public"
&lt;/FilesMatch&gt;
# 2 DAYS
&lt;FilesMatch "\.(xml|txt)$"&gt;
Header set Cache-Control "max-age=172800, public, must-revalidate"
&lt;/FilesMatch&gt;
# 2 HOURS
&lt;FilesMatch "\.(html|htm)$"&gt;
Header set Cache-Control "max-age=7200, must-revalidate"
&lt;/FilesMatch&gt;
# compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain # <a id="CompressSetting"></a><span><img src="../common/images/callouts/3.png" alt="3" border="0"></img></span>
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
# Or, compress certain file types by extension:
&lt;Files *.html&gt;
SetOutputFilter DEFLATE
&lt;/Files&gt;
</pre><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><p><a href="#AddDefaultCharSet"><span><img src="../common/images/callouts/1.png" alt="1" border="0"></img></span></a> </p></td><td valign="top" align="left"><p>See <a class="ulink" href="http://www.sagehill.net/docbookxsl/SpecialChars.html" target="_top">Odd
characters in HTML output</a> in Bob Stayton's book <em class="citetitle">DocBook XSL:
The Complete Guide</em> for more information about this setting.</p></td></tr><tr><td width="5%" valign="top" align="left"><p><a href="#CachingSettings"><span><img src="../common/images/callouts/2.png" alt="2" border="0"></img></span></a> </p></td><td valign="top" align="left"><p>These lines and those that follow cause the browser to cache various resources
such as bitmaps and JavaScript files. Note that caching JavaScript files could cause
your users to have stale search indexes if you update your document since the search
index is stored in JavaScript files.</p></td></tr><tr><td width="5%" valign="top" align="left"><p><a href="#CompressSetting"><span><img src="../common/images/callouts/3.png" alt="3" border="0"></img></span></a> </p></td><td valign="top" align="left"><p>These lines cause the the server to compress html, css, and JavaScript files and
the brower to uncompress them to improve download performance.</p></td></tr></table></div></div><script type="text/javascript" src="../common/main.js"></script><div class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch02s02.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02s02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch02s03.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> </td></tr></table></div></div><div id="sidebar"><div id="leftnavigation" style="padding-top:3px;"><div id="tabs"><ul><li><a href="#treeDiv" style="outline:0;" tabindex="1"><span class="contentsTab">Contents</span></a></li><li><a href="#searchDiv" style="outline:0;" tabindex="1" onclick="doSearch()"><span class="searchTab">Search</span></a></li></ul><div id="treeDiv"><img src="../common/images/loading.gif" alt="loading table of contents..." id="tocLoading" style="display:block;"></img><div id="ulTreeDiv" style="display:none"><ul id="tree" class="filetree"><li><span class="file"><a href="ch01.html" tabindex="1">Introduction</a></span></li><li><span class="file"><a href="ch02.html" tabindex="1">Using the package</a></span><ul><li><span class="file"><a href="ch02s01.html" tabindex="1">Generating webhelp output</a></span></li><li><span class="file"><a href="ch02s02.html" tabindex="1">Using and customizing the output</a></span><ul><li id="webhelp-currentid"><span class="file"><a href="ch02s02s01.html" tabindex="1">Recommended Apache configurations</a></span></li></ul></li><li><span class="file"><a href="ch02s03.html" tabindex="1">Search indexing</a></span></li><li><span class="file"><a href="ch02s04.html" tabindex="1">Adding support for other (non-CJKV) languages</a></span></li><li><span class="file"><a href="ch02s05.html" tabindex="1">Adding images</a></span></li></ul></li><li><span class="file"><a href="ch03.html" tabindex="1">Developer Docs</a></span><ul><li><span class="file"><a href="ch03s01.html" tabindex="1">Design</a></span></li><li><span class="file"><a href="ch03s02.html" tabindex="1">Search</a></span><ul><li><span class="file"><a href="ch03s02s01.html" tabindex="1">New Stemmers</a></span></li></ul></li></ul></li><li><span class="file"><a href="ch04.html" tabindex="1">FAQ</a></span></li></ul></div></div><div id="searchDiv"><div id="search"><form onsubmit="Verifie(searchForm);return false" name="searchForm" class="searchForm"><fieldset class="searchFieldSet"><legend>Search</legend><center><input id="textToSearch" name="textToSearch" type="search" class="searchText" tabindex="1"></input> &nbsp; <input onclick="Verifie(searchForm)" type="button" class="searchButton" value="Go" id="doSearch" tabindex="1"></input></center></fieldset></form></div><div id="searchResults"><center></center></div><p class="searchHighlight"><a href="#" onclick="toggleHighlight()">Search Highlighter (On/Off)</a></p></div></div></div></div></body></html>