Java Web Start with Signed

Question

All,

I am having some trouble running a java web start application that has been generated by Netbeans 7.

I have migrated my existing java 6.9.1 application to Netbeans 7 and attempted to make it a web start application.

To do this I have checked the Enable Web Start option from the project properties.

For the codebase option I have Web Application Deployment selected. The Application descriptor is selected option which will point the JNLP application-desc element to my applications main class.

For signing, I have generated a key and pointed the Signing properties at this. I have the Mixed Code set to Trusted Only as my application will only used signed JARs.

When I compile, all referenced JAR files and the application JAR file are signed which is output in the console (for each one) as:

Signing JAR: D:\MyCode\dist\lib\somejarfile.jar to D:\MyCode\dist\lib\somejarfile.jar as signFiles
Enter Passphrase for keystore: Enter key password for signFiles: 

NOTE: signFiles is the alias I have used in the Signing properties in Netbeans.

The following files are created in my dist folder:

• lib
• jnlpcomponent1.jnlp
• launch.html
• launch.jnlp
• README.TXT
• My App.jar

I have copied these to my web folder that is hosted under tomcat which is C:\\Program Files\\Apache Software Foundation\\Tomcat 7.0\\webapps\\mywebapp.

I am running from the following URL in IE and Firefox: http://mylaptop:8080/mywebapp/launch.html

The following exception is thrown when I click the button in launch.html to launch the JNLP file:

com.sun.deploy.net.FailedDownloadException: Unable to load resource: file:/C:/Users/panderson/AppData/Local/Microsoft/Windows/Temporary Internet Files/Content.IE5/B3UCQV8C/$$codebase/launch.jnlp
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

My launch.jnlp file has the following:

<jnlp codebase="$$codebase" href="launch.jnlp" spec="1.0+">
...
<resources>
    <j2se version="1.6+"/>
    <jar href="My App.jar" main="true"/>
...

I am not too sure why it is looking under the temp folders in internet explorer for it...

... But I have tried putting the full url in the jnlp href to the launch.JNLP file http://mylaptop:8080/mywebapp/launch.jnlp then it throws the following exception:

com.sun.deploy.net.FailedDownloadException: Unable to load resource: file:/C:/Users/panderson/AppData/Local/Microsoft/Windows/Temporary Internet Files/Content.IE5/DR2O6URQ/$$codebase/My App.jar

If I then change the jar href to http://mylaptop:8080/mywebapp/My App.jar, the following exception is thrown when I click the button in the launch.html to run the launch.JNLP file.

BadFieldException[ The field <jnlp>codebase has an invalid value: $$codebase,$$codebase]

Any help or thoughts?

Cheers,

Andez

Answer 1

<jnlp codebase="$$codebase" href="launch.jnlp" spec="1.0+">

这些$$占位符值通常被转换为servlet或类似功能合理的东西。

Answer 2

This was suggested as a useful tool in the following question .

Try using JaNeLA and see if it finds any problems with your JNLP file.

Further double check and make sure the codebase url matches the url of your server/application.