Hi, We've have an application that has an applet to print label and barcodes to a Smart Lable Printer model 100. It works fine in I.E. when running under SUN's JDK and modifying the policy.java security file to grant permission to the application http//server. It also runs under the MS JVM in I.E. whem modifying the advance setting and using custom options. The problem is that the users desktops a locked down (crippled) so that custom setting can not be used and SUN's JDK can not be used. To try and get around this I created an applet .cab file and signed it with Authenticode and changed the applet code as follows;
Original code(works fine when modifying policy.java) APPLET_BEGIN_TAG = "<applet CODE=\"com/wfsc/rush/barcode/SLPApplet.class\" CODEBASE=\"../../\" ARCHIVE=\"slp_applet.jar\" HEIGHT=\"0\" WIDTH=\"0\">";
When the applet is called, the Authenticode dialog box appears as would be expected and after clicking RUN the applet does not load. The java console reports the following;
Microsoft (R) VM for Java, 5.0 Release 188.8.131.5210 ============================================== ? help c clear f run finalizers g garbage collect m memory usage q quit t thread list ============================================== java.lang.ClassNotFoundException: com.wfsc.rush.barcode.SLPApplet at com/ms/vm/loader/URLClassLoader.loadClass at com/ms/vm/loader/URLClassLoader.loadClass at com/ms/applet/AppletPanel.securedClassLoad at com/ms/applet/AppletPanel.processSentEvent at com/ms/applet/AppletPanel.processSentEvent at com/ms/applet/AppletPanel.run at java/lang/Thread.run
The SLPApplet class file and slp_applet.cab file are in the correct locations. What could be causing the applet not to be found?
Can you observe the network traffic to see whether the CAB file is actually downloaded? Can you download it manually?
Joined: Mar 31, 2006
Actually, I'm testing this locally on my pc as a local host using Tomcat and I can manually see and access all the files.
Joined: Mar 22, 2005
By "download" I meant download over HTTP, which is what the applet would be doing. I've never used the cabbase attribute, so I don't know how it interacts with the codebase attribute. You can take a look at the Tomcat logs to see whether it gets downloaded, and from which location the JVM actually tries to download it.