[ http://issues.apache.org/jira/browse/TAPESTRY-730?page=comments#action_12359635 ]
Tom Oehser commented on TAPESTRY-730: ------------------------------------- I get this problem whenever an error occurs, such as a bad ognl expression. WL813, Tapestry 4-rc1. So, first is the expected problem: 2005-12-07 15:36:04,114 WARN tapestry.error.RequestExceptionReporter Unable to process client request: Unable to read OGNL expression '<parsed OGNL expression>' of $BasePage_ [EMAIL PROTECTED]: request But then is this bug... Unable to present exception page: Attempt to change ContentType after calling getWriter() (cannot change charset from 'UTF8' to 'UTF-8') I assume it is the same bug... Any chance of applying the fix to check if the response is already committed by 4? I think Bea is wrong to fail this, the Servlet spec implies it should just be ignored, but would like it fixed in Tapestry... -Thanks, -Tom > Cannot change charset from 'UTF8' to 'UTF-8 during Redirection > -------------------------------------------------------------- > > Key: TAPESTRY-730 > URL: http://issues.apache.org/jira/browse/TAPESTRY-730 > Project: Tapestry > Type: Bug > Components: Framework > Versions: 4.0 > Environment: Windows XP - Bea Weblogic 8.1 SP2 - Jdk 142_06 - Tapestry 4.0b11 > Reporter: Paolo Donà > > I'm trying to run this simple page on WLS81 : > public abstract class Test extends org.apache.tapestry.html.BasePage { > > // do nothing, just redirect to Home when invoked > public Test(){ > addPageBeginRenderListener(new PageBeginRenderListener(){ > public void pageBeginRender(PageEvent event) { > throw new RedirectException("Home"); > } > }); > } > } > I've got two html templates: "Home.html" and "Test.html". both of them do not > have components, just plain html. > I wanna perform a redirection from Test to Home, so I try to call > http://localhost:8080/app?page=Test&service=page > On tomcat this call perform the redirection to the "Home" page. > On WLS 81 I get this exception instead: > org.apache.hivemind.ApplicationRuntimeException: Attempt to change > ContentType after calling getWriter() (cannot change charset from 'UTF8' to > 'UTF-8') > at > org.apache.tapestry.error.ExceptionPresenterImpl.presentException(ExceptionPresenterImpl.java:64) > at > $ExceptionPresenter_1073673e5c3.presentException($ExceptionPresenter_1073673e5c3.java) > at > $ExceptionPresenter_1073673e5c2.presentException($ExceptionPresenter_1073673e5c2.java) > at > org.apache.tapestry.engine.AbstractEngine.activateExceptionPage(AbstractEngine.java:121) > at > org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:280) > at > org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:60) > at > $WebRequestServicer_1073673e61a.service($WebRequestServicer_1073673e61a.java) > at > $WebRequestServicer_1073673e616.service($WebRequestServicer_1073673e616.java) > at > org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:56) > at > $ServletRequestServicer_1073673e5fa.service($ServletRequestServicer_1073673e5fa.java) > at > org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55) > at > $ServletRequestServicerFilter_1073673e5f6.service($ServletRequestServicerFilter_1073673e5f6.java) > at > $ServletRequestServicer_1073673e5fc.service($ServletRequestServicer_1073673e5fc.java) > at > org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52) > at > $ServletRequestServicerFilter_1073673e5f4.service($ServletRequestServicerFilter_1073673e5f4.java) > at > $ServletRequestServicer_1073673e5fc.service($ServletRequestServicer_1073673e5fc.java) > at > org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53) > at > $ServletRequestServicerFilter_1073673e5f8.service($ServletRequestServicerFilter_1073673e5f8.java) > at > $ServletRequestServicer_1073673e5fc.service($ServletRequestServicer_1073673e5fc.java) > at > $ServletRequestServicer_1073673e5ec.service($ServletRequestServicer_1073673e5ec.java) > at > org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:141) > at > org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:97) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) > at > weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971) > at > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402) > at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28) > at > weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) > at org.apache.tapestry.RedirectFilter.doFilter(RedirectFilter.java:103) > at > weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) > at > weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6356) > at > weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317) > at > weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118) > at > weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635) > at > weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585) > at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197) > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170) > Caused by: java.lang.IllegalStateException: Attempt to change ContentType > after calling getWriter() (cannot change charset from 'UTF8' to 'UTF-8') > at > weblogic.servlet.internal.ServletResponseImpl.setEncoding(ServletResponseImpl.java:848) > at > weblogic.servlet.internal.ServletResponseImpl.setHeader(ServletResponseImpl.java:674) > at > weblogic.servlet.internal.ServletResponseImpl.setContentType(ServletResponseImpl.java:269) > at > org.apache.tapestry.web.ServletWebResponse.getPrintWriter(ServletWebResponse.java:77) > at > $WebResponse_1073673e6ea.getPrintWriter($WebResponse_1073673e6ea.java) > at > $WebResponse_1073673e5ba.getPrintWriter($WebResponse_1073673e5ba.java) > at > org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:67) > at > $ResponseRenderer_1073673e5d4.renderResponse($ResponseRenderer_1073673e5d4.java) > at > org.apache.tapestry.error.ExceptionPresenterImpl.presentException(ExceptionPresenterImpl.java:46) > ... 36 more > It seems that the servletResponse is already committed during redirection. > The ServletWebResponse.getPrintWriter(ContentType) method try to reset the > contentType and get a new writer without checking if it needs to or not... > I think ServletWebResponse.getPrintWriter code should be modified this way: > public PrintWriter getPrintWriter(ContentType contentType) throws > IOException { > Defense.notNull(contentType, "contentType"); > if (_needsReset) > reset(); > _needsRes et = true; > if (!_servletResponse.isCommited( )) > _servletResponse.setContentType(contentType.toString()); > } > try { > return _servletResponse.getWriter(); > } catch (IOException ex) { > throw new ... > } > } > Paolo -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
