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From Nikolay Rychkov <nikolay.rych...@gmail.com>
Subject Programmatically redirection causes error on GAE.
Date Sun, 17 Oct 2010 16:56:07 GMT
*Hello Sirs,*

*
*

*In my experimental project **http://www.agost.ru* <http://www.agost.ru>* I
use redirection to main page
**http://www.agost.ru/to.do*<http://www.agost.ru/to.do>
* .*

*I have to do it this way because user should obtain session. I use
PrimeFaces to ajax login that does not work without session. *

*
*

*Sources:*

Index.xhtml:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"      xmlns:h="
http://java.sun.com/jsf/html"     >

<h:head>

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>

    <title</title>

</h:head>

<h:body>

    #{redirectBean.redirect}

</h:body>

</html>

RedirectBean:



import javax.faces.bean.ManagedBean;

import javax.faces.bean.RequestScoped;

import javax.faces.context.FacesContext;

import java.io.IOException;

@ManagedBean

@RequestScoped

public class RedirectBean {

    public String getRedirect(){

        try {


FacesContext.getCurrentInstance().getExternalContext().redirect("to.do");



        } catch (IOException e) {

            e.printStackTrace();

        }

        return "";

    }

}

Part of web.xml:

<welcome-file-list>

        <welcome-file>index.do</welcome-file>

 </welcome-file-list>

    <context-param>

        <param-name>javax.faces.DEFAULT_SUFFIX</param-name>

        <param-value>.xhtml</param-value>

    </context-param>

    <servlet-mapping>

        <servlet-name>Faces Servlet</servlet-name>

        <url-pattern>*.do</url-pattern>

    </servlet-mapping>



*Redirection works, but every time I have this error in log:*

*
*

java.lang.IllegalStateException: STREAM

                at org.mortbay.jetty.Response.getWriter(Response.java:616)

                at
javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:115)

                at
org.apache.myfaces.context.servlet.ServletExternalContextImpl.getResponseOutputWriter(ServletExternalContextImpl.java:184)

                at
org.apache.myfaces.shared_impl.view.JspViewDeclarationLanguageBase.renderView(JspViewDeclarationLanguageBase.java:154)

                at
org.apache.myfaces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:263)

                at
org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:85)

                at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:239)

                at
javax.faces.webapp.FacesServlet.service(FacesServlet.java:191)

                at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)

                at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)

                at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

                at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)

                at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)

                at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)

                at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)

                at
org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)

                at
org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)

                at
com.google.appengine.tools.development.StaticFileUtils.serveWelcomeFileAsForward(StaticFileUtils.java:80)

                at
com.google.appengine.tools.development.LocalResourceFileServlet.maybeServeWelcomeFile(LocalResourceFileServlet.java:247)

                at
com.google.appengine.tools.development.LocalResourceFileServlet.doGet(LocalResourceFileServlet.java:120)

                at
javax.servlet.http.HttpServlet.service(HttpServlet.java:693)

                at
javax.servlet.http.HttpServlet.service(HttpServlet.java:806)

                at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)

                at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)

                at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)

                at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

                at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)

                at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

                at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)

                at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

                at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)

                at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

                at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)

                at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)

                at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)

                at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)

                at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

                at
com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:349)

                at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

                at org.mortbay.jetty.Server.handle(Server.java:326)

                at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)

                at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)

                at
org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)

                at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)

                at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)

                at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)

                at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)


*Is that a bug or I do something wrong?*

*Thanks in advance*

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