How to run an external SWF inside a Flex Application?

问题

EDIT: Due to the answer I change the code posted. I've added the Security.allowDomain("*") line and that line throws me an error. So, how can that be made?

I want to run an Action Script 3.0 Application into a Flex Application. To do this I've done the following:

<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication windowComplete="loadSwfApplication()" xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        <![CDATA[
            private function loadSwfApplication()
            {
                // The next line throws me an error.
                Security.allowDomain("*");

                var urlRequest:URLRequest = new URLRequest("path/to/the/application.swf");
                swfLoader.addEventListener(Event.COMPLETE, loadComplete);
                swfLoader.load(urlRequest);
            }

            private function loadComplete(completeEvent:Event)
            {
                var swfApplication:* = completeEvent.target.content;
                swfApplication.init();  // this is a Function that I made it in the Root class of swfApplication
            }
        ]]>
    </mx:Script>

    <mx:SWFLoader id="sfwLoader"/>

</mx:WindowedApplication>

The problem is that in the calling of swfApplication.init(); the AIR Player throws me an exception:

Security sandbox violation: caller file:///path/to/the/application.swf cannot access Stage owned by app:/SWFApplicationLoader.swf.

This is because somewhere in application.swf I use the stage like this:

if (root.stage != null)
    root.stage.addEventListener(Event.REMOVED, someFunction);
root.stage.stageFocusRect = false;

How can I load this swf application and USE the stage without any problems?

回答1:

You can try to load your SWF temporarily into a ByteArray and then load it with your SWFLoader.

Don't forget to set allowCodeImport to true since your SWF has as code inside.

Of course be sure that your loaded swf is secure enough for your application since it will have access at all your property.

private function loadSwfApplication():void {
  // load the file with URLLoader into a bytearray
  var loader:URLLoader=new URLLoader();

  // binary format since it a SWF
  loader.dataFormat=URLLoaderDataFormat.BINARY;
  loader.addEventListener(Event.COMPLETE, onSWFLoaded);

  //load the file
  loader.load(new URLRequest("path/to/the/application.swf"));
}
private function onSWFLoaded(e:Event):void {
 // remove the event
 var loader:URLLoader=URLLoader(e.target);
 loader.removeEventListener(Event.COMPLETE, onSWFLoaded);

 // add an Application context and allow bytecode execution 
 var context:LoaderContext=new LoaderContext();
 context.allowCodeImport=true;

 // set the new context on SWFLoader
 sfwLoader.loaderContext = context;

 sfwLoader.addEventListener(Event.COMPLETE, loadComplete);

 // load the data from the bytearray
 sfwLoader.load(loader.data);
}

// your load complete function
private function loadComplete(completeEvent:Event):void {
 var swfApplication:* = completeEvent.target.content;
 swfApplication.init();  // this is a Function that I made it in the Root 
                         // class of swfApplication
}

回答2:

If they are being loaded from different domains you are going to have to add a security exception - http://livedocs.adobe.com/flex/3/html/help.html?content=05B_Security_08.html

if its being run locally youre probably going to have to add them to the list of trusted files or folders in the settings manager - http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04.html#117502

回答3:

Assuming that the external SWF is also in the application directory, you could try loading it using the app:/ scheme:

var urlRequest:URLRequest = new URLRequest("app:/path/application.swf");

That may put it into the same security context as the main application.

回答4:

One thing you may want to consider is that if you are trying to run a SWF from inside your application directory in AIR, AIR restricts execution of files. If you copy the file to a temp file and the run it (along with allowLoadBytesCodeExecution set to true) then it works.

var file:File = File.applicationDirectory.resolvePath("myFile.swf");
this.tmpFile = File.createTempDirectory().resolvePath("myFile.swf");
file.copyTo(this.tmpFile);

imagePreview.loaderContext = lc;
imagePreview.source = tmpFile.url;