Run-time Error Handling for Flash App

I have been preparing an eSeminar on the topic of Flash Security. It was then I started reading about the subject of run-time error handling, like how to handle when security does not permit certain actions. Broadly speaking, there are asynchronous run-time error and synchronous run-time error.

Below is an example of handling async security run-time error when loading of external data is not permitted. As you can see the way to deal with this is to use event listener:

var xmlData:URLLoader = new URLLoader();

xmlData.load(new URLRequest(“http://localhost/FlashSecurity/fms_rss.xml“));

xmlData.addEventListener(Event.COMPLETE, doData);

function doData(e:Event):void

// use event listener to handle asynchronous error
xmlData.addEventListener(SecurityErrorEvent.SECURITY_ERROR, doError);

function doError(e:SecurityErrorEvent):void

Below is an example of handling sync security run-time error when cross-scripting is not permitted. As you can see the way to handle this is to use try/catch mechanism:

var swfContent:Loader = new Loader();
swfContent.x = swfContent.y = 0;

swfContent.load(new URLRequest(“http://localhost/FlashSecurity/b.swf“));

swfContent.contentLoaderInfo.addEventListener(Event.COMPLETE, doContent);

function doContent(e:Event):void
 // use a try and catch block to handle synchronous error
 catch (e:Error)

You can find more details description of error handling at the AS 3 help.


~ by brianchau on August 8, 2009.

One Response to “Run-time Error Handling for Flash App”

  1. cool! Thx

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