Bug 17699 - fmt tags and c:import remote ignore formatting rules
Summary: fmt tags and c:import remote ignore formatting rules
Alias: None
Product: Taglibs
Classification: Unclassified
Component: Standard Taglib (show other bugs)
Version: 1.0.2
Hardware: Other other
: P3 normal (vote)
Target Milestone: ---
Assignee: Tomcat Developers Mailing List
Depends on:
Reported: 2003-03-05 22:30 UTC by Serge Knystautas
Modified: 2004-11-16 19:05 UTC (History)
0 users

Simple use of fmt:formatDate tag (303 bytes, text/plain)
2003-03-05 22:31 UTC, Serge Knystautas
Using c:import remotely on test1.jsp causes problems (548 bytes, text/plain)
2003-03-05 22:31 UTC, Serge Knystautas

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Description Serge Knystautas 2003-03-05 22:30:45 UTC
Unfortunately I haven't been able to diagnose what is causing this, but
basically... if you have a page with a <fmt> tag, it works fine, and if you do a
<c:import> to that page locally, the results come across fine.  However, if you
use <c:import> to make a remote call to that page, the <fmt> tag ignores both
pattern and type attributes, and just looks like it prints the Date.toString().
 I'll attach test1.jsp and test2.jsp that demonstrate this behavior for me.

This was tested with 1.0.3 (version not available in bugzilla).
Comment 1 Serge Knystautas 2003-03-05 22:31:33 UTC
Created attachment 5170 [details]
Simple use of fmt:formatDate tag
Comment 2 Serge Knystautas 2003-03-05 22:31:57 UTC
Created attachment 5171 [details]
Using c:import remotely on test1.jsp causes problems
Comment 3 Serge Knystautas 2003-03-05 22:35:00 UTC
One more note... if you specify javax.servlet.jsp.jstl.fmt.fallbackLocale in
web.xml, then the pattern and type attributes are no longer ignored and it
behaves as one would expect.
Comment 4 Pierre Delisle 2003-06-18 21:31:22 UTC

As specified in section 7.4 of the spec (under 'Absolute URL'),

  When using an absolute URL to import a resource, none of the current execution
  environment (e.g. request and session attributes) is made available to the target
  resource, even if that absolute URL resolves to the same host and context path.
  Therefore, the request parameters of the importing page are not propagated to the
  target absolute URL.

This explains why the locale used by the formatting tags won't necessarily be
the same when importing a resource with an absolute URL. 

    -- Pierre
Comment 5 Serge Knystautas 2003-06-19 02:47:44 UTC

I see how this bug could be determined as invalid.

To me though, since the first page request is having a locale set by the
information in the browser's request, I would expect the c:import to carry the
necessary information for that same locale detection.  As you can see from the
test JSPs, I am not depending on request or session attributes.

I believe what would need to happen is passing the appropriate header(s) through
to have locale detection in the imported page.  I understand this is part of
execution context that's not supposed to be passed, but this is generally
something a developer has any control over.  Also, I don't see an easy way to
pass this locale information to the imported page.
Comment 6 Pierre Delisle 2003-06-19 23:09:25 UTC

I've added this issue to the TODO list for JSTL.next.
Hopefully, you'll join the new JSR to help us resolve the
issue appropriately :-)

[A workaround is to use a relative URL, but I understand this might
not be possible in your specific situation...]