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https://issues.jboss.org/browse/JBSEAM-5093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772428#comment-12772428
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Marek Novotny commented on JBSEAM-5093:
---------------------------------------
I don't know how to check already written partial-response in response output
stream, so I clear the buffer with not committed content and let
MockExternalContext.redirect(String url) to add the partial-response data. The
tests - ErrorHandlingTest and ExceptionRedirectTest passes and booking demo
behaves correctly again. I will commit the change and will try to launch
functional tests to confirm it doesn't affect something else.
> Seam produces malformed partial response on ViewExpiredException with Ajax
> --------------------------------------------------------------------------
>
> Key: JBSEAM-5093
> URL: https://issues.jboss.org/browse/JBSEAM-5093
> Project: Seam 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.3.0.Final
> Environment: Seam 2.3.1-SNAPSHOT 2013-05-02
> 082f3b3459893b1c4200b7bd8ce99556f87f0dd0
> Reporter: Marek Schmidt
> Assignee: Marek Novotny
> Fix For: 2.3.1.CR1
>
>
> When ViewExpiredException occurs in an Ajax request, the response is
> malformed, containing duplicate partial-response element. This results in the
> response not being parsed (and in this case, redirect not being followed).
> {noformat}
> <?xml version='1.0' encoding='UTF-8'?>
> <partial-response><redirect
> url="/seam-booking/home.seam?cid=22"></redirect></partial-response><?xml
> version="1.0" encoding="UTF-8"?>
> <partial-response><redirect
> url="/seam-booking/home.seam?cid=22"/></partial-response>
> {noformat}
> This seems to happen, because there are two rules for the redirection in
> pages.xml:
> - main.xhtml has login required, handled in Pages.redirectToLoginView()
> <page view-id="/main.xhtml" login-required="true">
> - exception handler for ViewExpiredException, handled in ExceptionFilter
> <exception class="javax.faces.application.ViewExpiredException">
> <redirect view-id="/home.xhtml">
> ...
> </exception>
> None of the Seam's components involved (ExceptionFilter, Pages, Exceptions,
> RedirectHandler, MockExternalContext, ... ?) checks whether the response has
> already been written and the redirect partial response gets written twice.
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