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Security exception, only inside the web page: why?

Posted on 2002-05-30
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Last Modified: 2010-03-31
I've an applet that open a socket with the server to read datas.

This class runs good in the appletviewer, but if i open the HTML page witch have the applet inside, i have a Security exception.

What's wrong?
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Question by:fab1970
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9 Comments
 
LVL 92

Expert Comment

by:objects
ID: 7045789
Applets can only make network connections to the server that they were loaded from.
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Author Comment

by:fab1970
ID: 7046345
Right. So my applet connect to my PC ip address.

I've build a supertiny winsock "bridge" with VB (that i know a lot more!): it listen on my pc ip address, connect to a intranet ip address, and echoes everything.

The question is always the same: if my applet (that is loaded from my pc) can open a connection with my pc in the applet viewer, why it can't from the HTML page?
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Accepted Solution

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objects earned 300 total points
ID: 7046350
Because applet viewer has less security restrictions than IE or NS.
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LVL 92

Expert Comment

by:objects
ID: 7046353
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LVL 92

Expert Comment

by:objects
ID: 7046356
You can remove this restriction by 'signing' the applet.
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Expert Comment

by:heyhey_
ID: 7046655
> I've an applet that open a socket with the server to read datas.

usually applet is allowed to open sockets to it's web server machine only.

new Socket(getCodeBase().getHost(), port) should work fine.
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Expert Comment

by:objects
ID: 7048204
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Expert Comment

by:girionis
ID: 8813336
No comment has been added lately, so it's time to clean up this TA.

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- points to objects@idg

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