Calling JNLP file via Servlet

Hi Folks,
I need to pass runtime parameters to my jnlp file from URL param, like ?requestNum=12345&mergeId=1.
So I created a Servlet to process the request and add the requestParams at runtime in the JNLP file,
In the doGet Method I have teh following piece of code,
String[] args = new String[]{"requsetNum",request.getParameter("requestNum"),"mergeId",request.getParameter("mergeId")};
response.setContentType("application/x-java-jnlp-file");
PrintWriter out = response.getWriter();
//It writes the jnlp content prperly in console, System.out.println(JnlpFileContentBase.readBeforeArgElementsContent()+JnlpFileContentBase.populateArguments(args)+JnlpFileContentBase.readAfterArgElementsContent());
//I split the jnlp file content before and after the argument area out.println(JnlpFileContentBase.readBeforeArgElementsContent()+JnlpFileContentBase.populateArguments(args)+JnlpFileContentBase.readAfterArgElementsContent());
out.close();
But when i run on server the above the jnlp is not starting up,
Am i missing something in the doGet method? is the PrintWriter out object is enough to write back the content?
Please help me to find out what am missing out here.
Thanks
Subash

Hi Andrew,
Thanks for notifying that, but that due to my testings with several combinations, I copied the file and kept direcly under WEB-INF and under the webapps/ElemFinder and several places to see it could be retried or not. And hence copied one of the errors. Nothing worked btw.
I suspected initially it could be because of calling another jnlp file, but now i have my consolidated single jnlp file, but still have the FileNotFoundException for the jar file I have,
sb.append("<jar href=\"WEB-INF/org.eclipse.equinox.launcher_1.0.101.R34x_v20081125.jar\"/>\n"); // code from Servlet
This is the firs jar resource under the resource elements
Where I get the Exception,
java.io.FileNotFoundException: http://localhost:8080/ElemFinder/ElemFinderEngineInvoker/WEB-INF/org.eclipse.equinox.launcher_1.0.101.R34x_v20081125.jar
I think its basically issues with reading the resource files,
I tried with several options for this file either, placing under WEB-INF, under webapps/ElemFinder ... etc. Nothing seems to be working,
Any entries to be put in web.xml for this?
Pls help me to get rid of this....
Thanks
Subash
PS: BTW i dint try in teh util u gave sice the jnlp already is downloading from my App, do you think still needed to check in the util?

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