Display error page using web.xml <error-page>
I need to dispaly error page when IOException in thrown. How to do that with web.xml error-page tag?
start.jsf
public String doButton1Action()throws IOException{
String value = getText1().getValue().toString();
try{
File f =new File(value);
InputStream in =new FileInputStream(f);
...
}catch (IOException e){
thrownew IOException();
}
return"success";
}
I have this in web.xml:
<error-page>
<exception-type>java.io.IOException</exception-type>
<location>/ioerror.jsp</location>
</error-page>
[1123 byte] By [
basti78a] at [2007-11-27 2:28:35]
# 1
You have to catch error-code 500, this is because the Exception is caught by the FacesServlet.
Also see http://wiki.apache.org/myfaces/Handling_Server_Errors
By the way, it's not a good practice to suppress or overwrite exceptions, you'll never get the cause and the trace of the originating exception then.
So, remove the whole try/catch block or just gently do a "throw e;" instead of "throw new IOException();".
# 2
Ok, I removed try/catch block and changed exception-type to error-code
<error-page>
<error-code>500</error-code>
<location>/error.jsp</location>
</error-page>
Now I get Error Page Exception:
Error page exception
The server cannot use the error page specified for your application to handle the Original Exception printed below. Please see the Error Page Exception below for a description of the problem with the specified error page.
Is it enough to use just a plain jsp page with some text as an error page?
# 3
Depends on your design requirements :)You can apply some layout however. This article describes just a basic example.
# 4
Let's say I want (for now) just a page with simple text, nothing else, just to make it work first.
Part of my web.xml:
<servlet id="Servlet_1169826798543">
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>
javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>-1</load-on-startup>
</servlet>
<servlet id="Servlet_1169826805063">
<servlet-name>JavaScript Resource Servlet</servlet-name>
<servlet-class>
com.ibm.faces.webapp.JSResourceServlet</servlet-class>
<load-on-startup>-1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.faces</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>JavaScript Resource Servlet</servlet-name>
<url-pattern>/.ibmjsfres/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<error-page>
<error-code>500</error-code>
<location>/errorPage.jsp</location>
</error-page>
So I keep getting this error page from server, when trying to direct error to my error page:
Error page exception
The server cannot use the error page specified for your application to handle the Original Exception printed below. Please see the Error Page Exception below for a description of the problem with the specified error page.
Original Exception:
Error Message: #{pc_Start.doButton1Action}: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:/temp/ghostfile.txt
Error Code: 500
Target Servlet: Faces Servlet
Error Stack:
javax.faces.FacesException: #{pc_Start.doButton1Action}: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:/temp/ghostfile.txt
...
Error Page Exception:
Error Message: Cannot find FacesContext
Error Code: 0
Target Servlet: null
Error Stack:
javax.servlet.jsp.JspException: Cannot find FacesContext
Am I missing something here?
# 5
> Error Message: Cannot find FacesContext
> Error Code: 0
> Target Servlet: null
> Error Stack:
> javax.servlet.jsp.JspException: Cannot find
> FacesContext
You need to apply url-pattern of the FacesServlet on the errorpage. *.faces or /faces/ so that the FacesServlet gets invoked.
Replace<location>/errorPage.jsp</location>
by<location>/errorPage.faces</location>
# 6
I tried that earlier but then I get error just printed to console and HTTP 500 - Internal server error -page, bubt not my errorPage.
[26.1.2007 21:19:16:543 EET] 00000038 jsfE com.sun.faces.lifecycle.InvokeApplicationPhase execute #{pc_Start.doButton1Action}: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:\temp\ghostfile.jpg
javax.faces.FacesException: #{pc_Start.doButton1Action}: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:\temp\ghostfile.jpg
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:79)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:298)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:412)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:220)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:92)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:93)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:194)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:741)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:863)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1510)
Caused by: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:\temp\ghostfile.jpg
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:131)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
... 25 more
# 7
Ok, I got it working now. Thanx for your help.
# 8
What was the solution?
# 9
Last line at error dump:
0000003d ServletWrappe ISRVE0242I: [ErrorTestEAR] [/ErrorTest] [/errorPage.jsp]: Initialization successful.
Page was loaded ok but was not displayed. I was using IE. Then I tried with Firefox and it worked fine. I tried to change IE's confoguration and unchecked 'Show friendly HTTP error messages' check box. Then my custom error page worked also in IE.
