PRB: Security Exception when Launching an Applet with Images

• Microsoft Win32 Virtual Machine for Java

SYMPTOMS

When trying to launch a Java Applet with animation support from outside the DevStudio environment, the applet fails to launch properly and the Java log shows the following AppletSecurityException error:

   *** Security Exception: Couldn't connect to with origin from file
   ****com.ms.applet.AppletSecurity.checkConnect at
   com/ms/applet/BrowserAppletFrame.getImageFromHash at
   com/ms/applet/BrowserAppletContext.getImage at
   java/applet/Applet.getImage...

RESOLUTION

To work around the problem, you can use either of the following methods:

• Use a build of the Microsoft Java VM newer than 1516. You can find a newer build at http://www.microsoft.com/java.

  -or-

• You can load the applet from a Web server, since it will not be a file URL and is allowed to connect to the host from which it was loaded. NOTE: the image files need to also exist on the server in the same or subordinate folder of the applet.

  -or-

• You can run the applet from DevStudio, which relaxes the security restrictions imposed on an applet. Essentially, placing the class files of the applet in the system classpath

  -or-

• You can place the applet in a signed CAB file, again to relax the security restrictions imposed on an applet.

MORE INFORMATION

This problem happens only under the Microsoft VM build 1516, when loading the applet via a file URL.

Steps to Reproduce Behavior

1. Install the Microsoft Java VM build 1516.

2. Create a default Applet Wizard applet, with animation support.

3. Launch Internet Explorer outside of Developer Studio by clicking on the project's HTML page.

REFERENCES

For more information on Cab&Sign, please refer to the Sample CabAndSign that comes with the Visual J++.

For additional information on the current release of the VM, please refer to the following Knowledge Base article:

   ARTICLE-ID: Q163637
   TITLE     : INFO: Availability of Current Build of Microsoft VM
               for Java

   http://support.microsoft.com/support/visualj/
   http://support.microsoft.com/support/java/

Keywords          : kberrmsg JVM VJMisc
Technology        : kbInetDev
Platform          : WINDOWS
Issue type        : kbprb