Problem in web.xml -- servletcontext

Pls look at the code and web.xml file for invoking servlet.
index.html
<html>
<head>
<title>Servlet Context Example</title>
</head>
<body>
<form method="get" action="callservlet">
<input type="submit" value="Submit">
</form>
</body>
</html>ServletConExample.java
package com.servletcontext;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ServletConExample extends HttpServlet {
     private static final long serialVersionUID = 1L;
     ServletContext con;
     public void init()
          con = getServletContext();
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException
          con.setAttribute("logname", "shobhit");
          response.sendRedirect("./com.servletcontext.TestServCon");
}TestServCon.java
package com.servletcontext;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TestServCon extends HttpServlet {
     private static final long serialVersionUID = 1L;
     ServletContext con;
     public void init()
          con = getServletContext();
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException
          String str = (String)con.getAttribute("logname");
          response.getWriter().println("value of attribute logname is "+str);
}web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app>
     <servlet>
          <servlet-name>servletcontext</servlet-name>
          <servlet-class>com.servletcontext.ServletConExample</servlet-class>
     </servlet>
     <servlet-mapping>
          <servlet-name>servletcontext</servlet-name>
          <url-pattern>/callservlet</url-pattern>
     </servlet-mapping>
     <Welcome-file-list>
          <Welcome-file>index.html</Welcome-file>
     </Welcome-file-list>
</web-app>Error Page:
HTTP Status 404 - /ServletContext/com.servletcontext.TestServCon
type Status report
message /ServletContext/com.servletcontext.TestServCon
description The requested resource (/ServletContext/com.servletcontext.TestServCon) is not available.
Apache Tomcat/5.5.26 I think problem is in web.xml file. Can any help me to resolve this problem.
Thanks,
Shobhit

You must declare TestServCon.java on web.xml as you did for the first servlet
and in the sendRedirect use the following code :
response.sendRedirect("TestServCon");// TestServCon is the servlet mapping you declared in web.xml
//or this
response.sendRedirect("./TestServCon");

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i have some dificulty to post here. but can somebody help my with my web.xml files?
thanks for your help.
have a nice day!

Be careful with the place of your files and folders. It's possible that you've just mentioned the cause of your problem.
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-- Rob
WLS Blog http://dev2dev.bea.com/blog/rwoollen/

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<filter-mapping>
<filter-name>extensionsFilter</filter-name>
<url-pattern>/faces/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>Seam Redirect Filter</filter-name>
<url-pattern>*.jsf</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>KTServletFilter</filter-name>
<url-pattern>*.jsf</url-pattern>
</filter-mapping>

<listener>
<listener-class>org.jboss.seam.servlet.SeamListener</listener-class>
</listener>
<listener>
<listener-class>com.kenexa.kr.web.KRServletListener</listener-class>
</listener>
<servlet>
<servlet-name>faces</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>faces</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/rc/systemError.jsf</location>
</error-page>
</web-app>
As per the configuration, when exception is thrown out of the application, container tries to display systemError.jsp page. If we want to include the JSF tags in systemError.jsp page, the request should pass through FacesServlet, so in the <error-page> <location> tag systemError page is specified with the extention systemError.jsf though it's actual extention is .jsp
When exception is thrown from the application container invoke the error page but, while rendering systemError.jsf page exception is thrown saying "Exception processing error page "systemError.jsp" "
To solve this problem i've gone through several forums, materials.
In one forum a guy said, JSF1.1 spec has some problem in displaying error pages. To solve this don't write <f:view> tags in the error page, use <f:subview> intstead. By reading this, i again changed the contents of systemError.jsp page replacing <f:view> by <f:subview>. But the error is still repeating.
Finally what i found is, when we use Ajax4jsf in the application, its AjaxViewRender class is throwing exception while rendering error pages configured through web.xml.
So what i did is i changed error page extention from .jsf to .jsp in the <location> tag. Now jsf won't come in the picture and remove JSF related tags from the systemError.jsp page.
<error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/rc/systemError.jsp</location>
</error-page>
Any comments are welcome----------------------------------------------------------------

I too iam facing the same problem could you advise if you have found any solutions
-Ram

Problem in uri references in web.xml

There are quite a few instances where external URIs are referenced in various sorts of files in WebAdmin. For example:
index.jsp:
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:bean="BEAN" xmlns:logic="LOGIC" xmlns:html="HTML" xmlns:nested="NESTED" xmlns:custom="CUSTOM" xmlns:c="C" version="1.2">
web.xml:
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
If Tomcat is running behind a firewall where the URIs are unreachable, it is very likely that Tomcat/WebAdmin will not start or will, at best, start in an impaired state.
Cache all these external reference to local files.
If it is, then download the external reference and update the URI to point to a local resource. For example:
old:
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd
new:
http://emg-vip:12300/xml/ns/j2ee/web-app_2_4.xsd

thank you for these possible problems and solutions.
But are you really sure this problem occurs ?
And URI is not an URL and normally the resources referenced by the URI's are not downloaded anyway.

Problem with mime type in web.xml file

Hi everybody,
I actually got a problem with mime types on Weblogic 6.0 under Linux.
I read the documentation so I added the next lines in the web.xml file in
the WEB-INF directory of my server :
<mime-mapping>
<extension>
doc
</extension>
<mime-type>
application/msword
</mime-type>
</mime-mapping>
<mime-mapping>
<extension>
ppt
</extension>
<mime-type>
application/vnd.ms-powerpoint
</mime-type>
</mime-mapping>
Why can't I retrieve a .doc or .ppt files with an internet browser correctly
? I get only text/plain ...
Can someone help me ?
Regards,
Alexis Berger

I am having the same problem with doc and xsl. I have added this
<mime-mapping>
<extension>xls</extension>
<mime-type>application/vnd.ms-excel</mime-type>
</mime-mapping>
<mime-mapping>
<extension>doc</extension>
<mime-type>application/msword</mime-type>
</mime-mapping>
to my web.xml. I even restarted the server. I still see doc and xsl in binary.
Is there some other setting that needs to take place?
I am using WL6.1 with fixpack 1.
I can see the doc and excel files in the browser if I don't go through the weblogic
server. That just confirms it's not my browser.
Kumar Allamraju <[email protected]> wrote:
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
It works fine for me in 6.1 SP1.
<br><br>
If the following doesn't work , can you
<br>try application/winword instead of application/msword?
<p>--
<br>Kumar
<p>Siming Mu wrote:
<blockquote TYPE=CITE>Hi,
<p>I setup in my web.xml a mime mapping as follows,
<p><mime-mapping>
<br><extension>doc</extension><mime-type>application/msword</mime-type>
<br></mime-mapping>
<p>When I specify a test.doc url, the doc file appears in my browser
as
binary data
<br>instead of download.
<p>Please reference change request 055002, which decribes this problem.
According
<br>to edocs, it has been fixed in wls6.1sp1.
<p>But I am seeing it fixed. Am I doing anything wrong? Thanks.
<p>Siming</blockquote>
</html>

Problems with jsp-error page in web.xml

Hello everybody, I have a confusing problem concerning the use of jsps as error pages for 404-errors.
I inserted the following lines in my web.xml file:
<error-page>
<error-code>404</error-code>
<location>/personal404.jsp</location>
</error-page>
The problem is: when an 404 occurs, instead of showin the personal404.jsp, the browser tells me that it tries to download a file which it can't (it tries to download the mis-spelled file). When I try to redirect the 404 to a static html-page, as in
<error-page>
<error-code>404</error-code>
<location>/personal404.html</location>
</error-page>
everything works fine.
Please, does anybody have any idea or suggestion, what I am doing wrong?
Thanks in advance,
Sebastian

Hi Ivan,
I tried it, but there wasn't any difference.
I'll try to explain in more detail what happens:
Imagine my application has the following root-path
http://myServerName:port/mainRoot/
When I try the following URL:
http://myServerName:port/mainRoot/pageThatDoesNotExist.jsp, the browser tells me, it tries to download the file pageThatDoesNotExist.jsp from myServerName and that it can't find that file.
The same happens, when I type http://myServerName:port/mainRoot/pathThatDoesNotExist/pageThatDOESExist.jsp, except that the browser tries to download the file pageThatDOESExist.jsp which (again) it can't.
I have located the files 404.jsp and 404.html in the same directory, so I don't think this is a path-related problem, because everything works fine, when I specify the 404.html as the target error page (i.e. the browser displays the 404.html when I type the URLs shown above).
I don't know if I'm making this clear, but maybe you get the idea.
Sebastian

Problems with error-page in web.xml and page caching

Having a few problems with error pages and web.xml with browsers caching the error pages and strange errors coming out of weblogic.servlet.intenal.WebAppServletContext
I'm trying to set a web app up so that all http errors and all exceptions are routed thruogh predefined resources. For now, I'm simply send 400 errors to 400.html and the ServletException, IOException and RuntimeException to respective html pages.
What I'm finding is that the error codes work fine but the exceptions are only be routed to the correct error page for the first call to the servlet after server restart.
So for example, I have my servlet throwing a ServletException as a test case. The weblogic server log shows that ServletException is thrown, and the correct error page for ServletExceptions is shown.
If I change the Servlet code to throw IOException in place of SevletException, the weblogic.log shows that IOExceptyion is being thrown (so the servlet has deployed successfully), however the Servletxception error page is shown on the browser.
I'm using IE6 and I've changed the setting such that a new page is requested every time using the tools-internet options-temp internet files-settings option to "check for new versions of stored pages: Every visit to the page".
Despite this, the servlet exception error page still appears.
If you clear the cache from the temp intenet files->delete files IE option, the correct errror page will be shown so it appears that the browser cache is being used after all.
everytime I delete the temp intenet files I get the correct error page on the first request after but then not after that.
I have implemented the service method for this test to throw the exceptions - does this make a differecne?
As a test, I have moved the imlpementation to the doGet method instead bu I now get a strange eror from weblogic comlpaining about an arrayOutOfBoundsException because eror codes in the web.xml are not supported! - see error above.
Any help is appreciated

After further investigation: -
There are no problems with error pages based on error codes, only error exceptions.
As a test case, I have a service method in a servlet throwing either one of the three exception types that servlets can throw (Runtime, Servlet & IO) the following rules apply. The exception to be thrown is hardcoded and is changed and the web app rebuilt each time. The correct web.xml has been deployed to the app server (checked through console). the webapp is being redeployed correctly - this can be seen in the weblogic log, where the correct exception is reported.
I am using WLS 8.1, Servlet 2.3, JDK 1.4.1_02
In all cases, the weblogic log reports that the servlet is throwing the exception as expected.
Despite having set error-page for exception javax.servlet.ServletException, the exceptions are diverted to the error page that has been set up for http error code 500
The error page for ServletException is therefore never reached.
I have the browser set to request pages every time it is asked.
Once the servlet has thrown an IOException, the only way to get the browser to report an IO or Runtime exception error-page is to clear the browser cache. Restarting the server has no effect.
Once the servlet has responded with ANY exception, it is not possible to get it to report a ServletException (which is incorrectly reported as a 500 anyway) unless the cache is cleared. Restarting the server has no effect.
In the case where the servlet throws ServletException, it has no root exception. The servlet 2.3 spec states that if ServletException is thrown but cannot be found in the error pages, the root excpetion will be extracted and the error page list traversed again. Knowing that the RuntimeException error page is correct shown when RuntimeException is throwm, I have nested this inside the ServletException, however error page for http error 500 is still shown.
I don't believe this is a WLS 8.1 problem, as the console shows that the correct exception is thrown each time. this is backed up by the fact that the correct exception page is thrown when the cache is cleared regardless of what exception was previousdly thrown by the servlet. This excludes ServletException which is always incorrectly thrown as a 500.

Problem in web.xml -- servletcontext

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