I've done projects where I've dealt with this issue, and came up with solutions similar to what others have proposed.
However, ultimately I realized that this was basically wrong, at least for CSS and JS. For both of these, you're much better off serving a single cacheable file, rather than only including the files you need. This plays much better with typical web clients.
As to the general problem, I haven't run into it too often, and usually when I do it's not too complicated. The most common example is wanting to generate the <title> tag in a top-level autohandler and getting the title from the requested component. This is easily done with Mason's method system.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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