Can't catch SecurityException?
Hello,
I have an photo book Applet that I use to search and download images, it mostly works but sometimes will fail with a SecurityException when it attempts to download certain images.
I've tried this in a try { } catch { } but it just ignores it and still throws the SecurityException.
I have not altered my security or permissions, and am running the applet on my computer rather than on a site.
I've read about 'SecurityManager' and some AllPermission setting but am not sure how that fits in or to implement it?
Any help would be fantastic,thanks!
[595 byte] By [
not_terrya] at [2007-11-27 1:18:04]
# 1
Have you looked at the calling stacks for the SecurityException? Maybe it does not come from your own code therefore you cannot catch it.
As for AllPermission things, read http://java.sun.com/javase/6/docs/technotes/guides/plugin/developer_guide/security.html to find out how to sign an applet.
# 2
Hey,It doesn't - you are right... is there a quick way to just allow all permissions, no matter what, in Java? I looked at AllPermissions and SecurityManager but am not sure how that fits in...Thanks
# 3
The easiest way is to sign the applet:
1. pack the class into a jar
2. use keytool to generate a keypair
3. sign the jar with the keypair
Every time you want to run a signed applet, the browser will ask you if you trust it. Since this applet is written by yourself, I suppose you can safely trust it and then it will have AllPermission.
# 5
Sorry, don't know about Eclipse.You can follow the steps in http://java.sun.com/javase/6/docs/technotes/guides/plugin/developer_guide/rsa_signing.html. Note that you needn't get a real certificate, you can skip the 2,3,4 of keytool.
