Detect allowNetworking parameter in Flash

Greetings,

This is regarding a Flash security/sandbox issue. I was wondering if there was a way for the loaded Flash .swf object to know whether allowNetworking="internal" is set for it, possibly using ActionScript (2.0 or 3.0).

I found a solution, but it does not differentiate whether the restrictio开发者_如何学Cns are from allowNetworking or allowScriptAccess settings.

I am not particularly looking for a work around (although that would be interesting too), but just to be able to detect whether specifically allowNetworking is set to "internal" or at least something other than "all".

Cheers :)

You can test for the networking API restrictions by trying to execute specific restricted APIs and seeing if a SecurityError is thrown.

public static function getNetworkingRestriction():String {

            var result:String = "all"; // default level

            try {
                // first try SharedObject.  If it throws a SecurityError, then allowNetworking="none"
                SharedObject.getLocal("test"); 

                try {
                    // SharedObject didn't throw a SecurityError. 
                    //If ExternalInterface.call() throws a SecurityError then allowNetworking="internal"
                    ExternalInterface.call(""); 
                }
                catch (e:SecurityError) {
                    result = "internal";
                }

            }
            catch (e:SecurityError) {
                result = "none";        
            }

            return result;

        }

A list of the restricted networking APIs can be found here