Java applet socket server permissions

Question

• I want to make a Java applet, which functions as a socket server (local network ips, or 127 range is fine).
• I want this applet to run in a webpage.
• the browser can ideally load the webpage from the file system (file://...), but I could install an HTTP server if required.
• The applet will need to be able to interact with JavaScript.

I'm having trouble wading through all the docs. Is the above possible? I'm not familiar with java's security model. If I need to sign the applet, or set some special security or configuration settings, that's fine.

edit- In case anyones curious, the applet does very little. I just want to use it as a bridge so that another program running on the local computer can communicate via sockets. That program supplies values, which javascript will use to update the ui in real time. The ui is complicated, and building it in html/javascript will be a huge time saver. I'd prefer the applet function as the socket server opposed to a socket client, because otherwise then I need to write a seperate program to act as a server in between the applet and the other program.

Answer 1

Is the above possible?

Sure. If you control the security/policy files for that applet & the firewall, it is a single browser deal, it should be doable. You might need to wrap some of the applet methods in a PrivilegedAction if called from JS.