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29 <h1 class="SECT1"><a name="TEMPLATES" id="TEMPLATES">10. Privoxy's Template Files</a></h1>
30 <p>All <span class="APPLICATION">Privoxy</span> built-in pages, i.e. error pages such as the <a href=
31 "http://show-the-404-error.page" target="_top"><span class="QUOTE">"404 - No Such Domain"</span> error page</a>,
32 the <a href="http://ads.bannerserver.example.com/nasty-ads/sponsor.html" target="_top"><span class=
33 "QUOTE">"BLOCKED"</span> page</a> and all pages of its <a href="http://config.privoxy.org/" target="_top">web-based
34 user interface</a>, are generated from <span class="emphasis"><i class="EMPHASIS">templates</i></span>.
35 (<span class="APPLICATION">Privoxy</span> must be running for the above links to work as intended.)</p>
36 <p>These templates are stored in a subdirectory of the <a href="config.html#CONFDIR">configuration directory</a>
37 called <tt class="FILENAME">templates</tt>. On Unixish platforms, this is typically <a href=
38 "file:///etc/privoxy/templates/" target="_top"><tt class="FILENAME">/etc/privoxy/templates/</tt></a>.</p>
39 <p>The templates are basically normal HTML files, but with place-holders (called symbols or exports), which
40 <span class="APPLICATION">Privoxy</span> fills at run time. It is possible to edit the templates with a normal text
41 editor, should you want to customize them. (<span class="emphasis"><i class="EMPHASIS">Not recommended for the
42 casual user</i></span>). Should you create your own custom templates, you should use the <tt class=
43 "FILENAME">config</tt> setting <a href="config.html#TEMPLDIR">templdir</a> to specify an alternate location, so
44 your templates do not get overwritten during upgrades.</p>
45 <p>Note that just like in configuration files, lines starting with <tt class="LITERAL">#</tt> are ignored when the
46 templates are filled in.</p>
47 <p>The place-holders are of the form <tt class="LITERAL">@name@</tt>, and you will find a list of available
48 symbols, which vary from template to template, in the comments at the start of each file. Note that these comments
49 are not always accurate, and that it's probably best to look at the existing HTML code to find out which symbols
50 are supported and what they are filled in with.</p>
51 <p>A special application of this substitution mechanism is to make whole blocks of HTML code disappear when a
52 specific symbol is set. We use this for many purposes, one of them being to include the beta warning in all our
53 user interface (CGI) pages when <span class="APPLICATION">Privoxy</span> is in an alpha or beta development
55 <table border="0" bgcolor="#E0E0E0" width="100%">
58 <pre class="SCREEN"><!-- @if-unstable-start -->
60 ... beta warning HTML code goes here ...
62 <!-- if-unstable-end@ --></pre>
66 <p>If the "unstable" symbol is set, everything in between and including <tt class="LITERAL">@if-unstable-start</tt>
67 and <tt class="LITERAL">if-unstable-end@</tt> will disappear, leaving nothing but an empty comment:</p>
68 <table border="0" bgcolor="#E0E0E0" width="100%">
71 <pre class="SCREEN"><!-- --></pre>
75 <p>There's also an if-then-else construct and an <tt class="LITERAL">#include</tt> mechanism, but you'll sure find
76 out if you are inclined to edit the templates ;-)</p>
77 <p>All templates refer to a style located at <a href="http://config.privoxy.org/send-stylesheet" target=
78 "_top"><tt class="LITERAL">http://config.privoxy.org/send-stylesheet</tt></a>. This is, of course, locally served
79 by <span class="APPLICATION">Privoxy</span> and the source for it can be found and edited in the <tt class=
80 "FILENAME">cgi-style.css</tt> template.</p>
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