Hi,
I'm trying to use UrlRewriteFilter (
http://code.google.com/p/urlrewritefilter/ - basically Apache mod_rewrite
implemented in a filter) with Guice. I've found that request parameters seem
to get stripped off when dispatching to a Guice managed Servlet.
I wrote a simple servlet to confirm this:
Non Guice-managed servlet, mapped in web.xml to "/test"
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
RequestDispatcher rd =
request.getRequestDispatcher("/album?username=hello");
rd.forward(request, response);
}
Guice mapping:
serve("/album*").with(AlbumController.class);
Guice-managed Servlet:
String albumOwnerUsername = req.getParameter("username");
System.out.println(req.getParameterMap());
System.out.println(albumOwnerUsername);
If I visit /test, I get the following outputted:
{}
null
(ie, the parameter has been lost. Visting "/album?username=hello" works
correctly)
I've seen a few previous postings about this, but never a resolution or a
real explanation for why this should(?) happen.
I did some browsing in the Guice code, and found the following comment -
which might be totally unrelated - or might indicate this behaviour is by
design.
// TODO(dhanji): check servlet spec to see if the following is legal or
not.
// Need to strip query string if requested...
http://code.google.com/p/google-guice/source/browse/trunk/extensions/servlet/src/com/google/inject/servlet/ManagedServletPipeline.java#11<http://code.google.com/p/google-guice/source/browse/trunk/extensions/servlet/src/com/google/inject/servlet/ManagedServletPipeline.java#116>
5
(I can't actually see where the parameters are being stripped, though)
Either way - is this a bug? Or can someone please explain why Guice needs to
strip the parameters?
Thanks
Nick
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