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From "Nathaniel Alfred" <Alfred.Nathan...@swx.com>
Subject RE: redirect's never return...
Date Tue, 25 Feb 2003 22:11:46 GMT
I think that you assume that cocoon:/directory/../_navigation.xml should
be
contracted to cocoon:/_navigation.xml and therefore match the first
pattern.

(Cocoon doesn't do this contraction for the good reason that /foo/bar/..
is not the same as /foo if /foo/bar is a symbolic link.)

So what is that the redirect-to matches the second pattern as 
directory/../_navigation.xml, then as directory/../../_navigation.xml
in an infinite recursion.

What you need to do, is to have three patterns:

<map:match pattern="_navigation.xml">
 <map:generate src="{defaults:content}/_null-navigation.xml"/>
 <map:serialize type="xml"/>
</map:match>

<map:match pattern="*/_navigation.xml">
 <map:act type="resource-exists">
  <map:parameter name="url"
value="{defaults:content}/{1}/_navigation.xml"/>
  <map:generate src="{defaults:content}/{../1}/_navigation.xml"/>
  <map:transform src="{defaults:design}/nav2xhtml.xsl"/>
  <map:serialize type="xml"/>
 </map:act>
 <map:redirect-to uri="cocoon:/_navigation.xml"/>
</map:match>

<map:match pattern="**/*/_navigation.xml">
 <map:act type="resource-exists">
  <map:parameter name="url"
value="{defaults:content}/{1}/{2}/_navigation.xml"/>
  <map:generate src="{defaults:content}/{../1}/{../2}/_navigation.xml"/>
  <map:transform src="{defaults:design}/nav2xhtml.xsl"/>
  <map:serialize type="xml"/>
 </map:act>
 <map:redirect-to uri="cocoon:/{1}/_navigation.xml"/>
</map:match>

This duplication of code may make you shudder too much.  I'm sure there
are
also more elegant solutions using a regexp matcher or map:call.  But it
will hardly require less lines.

HTH, Alfred.

-----Original Message-----
From: Ben Young [mailto:byoung@bju.edu]
Sent: Dienstag, 25. Februar 2003 19:49
To: cocoon-users@xml.apache.org
Subject: map:redirect's never return...


I have built a "looping" matcher in my root sitemap.xmap.

<map:match pattern="_navigation.xml">
 <map:generate src="{defaults:content}/_null-navigation.xml"/>
 <map:serialize type="xml"/>
</map:match>

<map:match pattern="**/_navigation.xml">
 <map:act type="resource-exists">
  <map:parameter name="url"
value="{defaults:content}/{1}/_navigation.xml"/>
  <map:generate src="{defaults:content}/{../1}/_navigation.xml"/>
  <map:transform src="{defaults:design}/nav2xhtml.xsl"/>
  <map:serialize type="xml"/>
 </map:act>
 <map:redirect-to uri="cocoon:/{1}/../_navigation.xml"/>
</map:match>

These matchers let you select part of use the cocoon:// psuedo-protocol
to
select the nearest _navigation.xml file. This allows the page to
"inherit"
the navigation from one of it's predecessors.

This works fine so long as I request it from the root sitemap (e.g.,
"cocoon:/"). If I request the _navigation.xml from a sub-sitemap, I get
a
StackOverflow error. It's almost as if the lopping some how changes the
context to the point that it never returns to the sub-sitemap.
Requesting a
cocoon:/directory/_navigation.xml in a cinclude tag cause the same sort
of
error.

Thanks for your help in advance,
Ben


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