Java Web Start Launch Failed. Why????

Kingp35

Hi everyone

Im using Java Web Start to start an application which allows a user to select an image on their machine. it will eventually do more but for testing purposes i just want to get this part working.

However when i try to run it i get these exceptions:

JNLPException[category: Download Error : Exception: java.io.IOException: HTTP response 404 : LaunchDesc: null ]
at com.sun.javaws.cache.DownloadProtocol.doDownload(Unknown Source)
at com.sun.javaws.cache.DownloadProtocol.getDownloadSize(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source)

at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)

at com.sun.javaws.Launcher.downloadResources(Unknown Source)

at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)

at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)

at com.sun.javaws.Launcher.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

here is a copy of my jnlp file to run the application>

<?xml version="1.0" encoding="utf-8"?>
<!-- JNLP File for FileChooserDemo2 -->
<jnlp
  spec="1.0+"
  codebase="http://performancecars.ie/Fatcamp/Chooser2"
  href="FileChooserDemo2.jnlp">
  <information>
    <title>Choose an Image</title>
    <vendor> Image Labs </vendor>
    <homepage href="http://performancecars.ie/fatcamp"/>
    <description>Image File Chooser</description>
    <description kind="short">Choose an image file on your computer.</description>
    <offline-allowed/>
  </information>
  <security>
  <all-permissions/>
  </security>
  <resources>
    <j2se href="http://java.sun.com/products/autodl/j2se" version="1.4+"/>
    <jar href="http://performancecars.ie/Fatcamp/Chooser2/allclasses.jar" download="eager" main="false"/>
    <jar href="http://performancecars.ie/Fatcamp/Chooser2/images.jar" download="eager main="false"/>
  </resources>
  <application-desc main-class="FileChooserDemo2"/>
</jnlp> 

all my jars are signed so I dont think that is the problem. I have searched the internet for answers to this and i cant find any. One answer was that my browser does not support the MIME type application/x-java-jnlp-file but i have successfully run .jnlp examples from the sun website so I dont think this is the case.

One guy said he had the same problem and solved it by changing the java webstart proxy settings but i dont use a proxy server so im really stuck. I have put all the resources needed on line and im having serious problems.

Im on a really tight time schedule so any help would be great im getting desperate have been at this for couple of days and just cant get it.

Thanks alot
Patrick

Kingp35

does anyone have any ideas at all.it would be a huge help to me.

rsynnott

Is the jar actually at the codebase address when you run the jnlp? Is the jnlp there? I had this problem recently ,adn it was something along those lines. It's a bloody fussy system. It's probably something to do iwth paths. it works when run from the JAR, right?

madramor

404 error means cannot find what its looking for
as before
make sure directory http://performancecars.ie/Fatcamp/Chooser2 contains
FileChooserDemo2.jnlp
allclasses.jar
images.jar

also, ref mime type, did you setup the server to serve the mime type

rsynnott

One other thing on this topic. You realise that on a UNIX server, such as the one you're using, http://performancecars.ie/Fatcamp/ and http://performancecars.ie/fatcamp/ are different entities? In your case, Fatcamp doesn't exist.
Rob.

Kingp35

ok im not entirely sure this is the problem but I made sure all of the items that i need are in the correct codebase thanks to rsynnott and i corrected my codebase so now all of the correct resources are in the right codebase which is http://performancecars.ie/fatcamp/Chooser2.

This is the exact url that i have in my jnlp file for the codebase but when i run the jnlp file it is reading the codebase in as http://performancecars.ie/fatcamp/chooser2 for some reason. Its reading Chooser2 with a small c instead of a large C and I think this could be the problem. The error its giving me is

An error occurred while launching/running the application.

Title: Choose an Image
Vendor: Image Labs
Category: Download Error

Unable to load resource: http://performancecars.ie/fatcamp/chooser2/FileChooserDemo2.jnlp

and then the same 404 exception as above as well. I have tried to correct the codebase to read it in as a large C but doesnt seem to be working.

Could this be my problem and does anyone know how to fix this. Maybe making a completely new jnlp file might work??