在IE中从Java调用JavaScript函数时，访问被拒绝异常

Question

I am getting Access Denied exception when I am calling a Java Script Function from Java Applet only in IE. ( modified my original question with updated information.)

Here is my HTML code

<script type="text/javascript">
   function uploadComplete() {
       alert("in Upload Complete");
       ju.doneUpload(true);
   }
</script>

ju is declared globally in the same page which calls the doneUpload from a different JavaScript file. I have included MAYSCRIPT in my applet Tag.

Java Code [After adding AccessController] :

 AccessController.doPrivileged(new PrivilegedAction<Object>() {
 public Object run() {

JSObject scriptObject = getScriptObject(uploadDialogBox.applet);
if(scriptObject != null) {
    try {
        // this is the call where it   throws an exception
       **scriptObject.call("uploadComplete", null);**
    } catch(JSException e) {
        System.out.println("exception " + e.getMessage() 
            + " WrappendException " + e.getWrappedException()
            + " stack trace " + e.getStackTrace());
    }
}
return null;
}

});

private JSObject getScriptObject(JApplet appletInstance) {
    JSObject result = null;
    // JSObject doc = null;
    try {
        result = JSObject.getWindow(appletInstance);
        // doc = (JSObject) result.getMember("document");
    } catch (JSException e) {
        System.out.println("Exception in getScriptObject : " + e.getMessage()
            + " Wrappend exception " + e.getWrappedException());
    }
    return result;
}

It throws an JSException: Access is denied

The alert function in uploadComplete is not called. What am I doing wrong here?

Answer 1

Does this help?

A summary from that answer on the Sun forums:

Hello, I had same problem. I solved it, you just need to implement applets method like this:

public void f() {
   AccessController.doPrivileged(new PrivilegedAction<Object>() {
      public Object run() {
         // do something
         return null;
      }
   });
}

The only problem with this approach is that when you call method for the first time, it takes pretty long time to respond (4-5s), and every next time, response is immediately.

: OK, a second potential solution is to use getDocument() as described in this article . One word of warning, in our testing, we have seen that this is not always reliable on Firefox on the Mac. The essence of this method is to do:

getAppletContext().showDocument(new URL("javascript:uploadComplete()"));