Why IE doesn’t drop Flash NetConnections / NetStreams and how to fix it.
The Adobe Flash Player ActiveX control for Internet Explorer 7 (I don’t know about IE6) will not disconnect NetConnections if the connection was made by a swf instance loaded in a tab and only that tab was closed. If IE itself is closed though the NetConnection will be dropped. This could lead to hung “ghost” connections where you won’t hear any audio, etc. but your Wowza Media Server (and maybe Flash Media Server, who knows?) will still think the client is connected.
Explanation
Laziness on the part of two large corporations.
Solution
Register a JS handler function for window.onbeforeunload that uses the Flash ExternalInterface to call a function in your swf that manually closes the NetConnection. The event “onbeforeunload” is recognized and executed by IE, Safari and Firefox before the onunload event is fired. It is apparently not handled by Opera AFAIK but that’s ok since IE is the only one that actually needs this fix.
In your ActionScript 3 code somewhere:
import flash.external.ExternalInterface;
....
private someFunction():void{
if( ExternalInterface.available ){
ExternalInterface.addCallback("disconnect", disconnect);
}
}
private function disconnect():void {
_my_net_connection1.close();
}
In your Javascript code for the page that loads your swf:
window.onbeforeunload = function(){
// pure JS
var swf = document.getElementById('mySwf');
swf.disconnect();
// jQuery 1.2.6 version
$("#mySwf")[0].disconnect();
}
The End
(image originally from visualizeus)
Tags: "actionscript 3", ActionScript, bug, disconnect, flash, ie, jQuery, netconnection
June 23rd, 2009 at 6:51 am
ok!!!
my Flash function passes variables to PHP which removes XML nods in XML file. It is kinde online user list for flash chat. In Flash it works great wen Log Out button pressed!!!! So when i call the function from Javascript it works but only onLoad, not “onbeforeunload”. it seems that flash can’t pass the data to PHP befor browser window closed!!!!! this is making me crazy!!!!! i cant figure it out!!!! Could You please Help me!!!!!!!!!!!!!!???????
Thanks a lot!!!!!!!!!!!!!!!
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September 21st, 2011 at 1:50 pm
Any idea how to do this with a VideoPlayer Component? Thanks!
November 25th, 2011 at 10:53 am
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November 27th, 2011 at 11:46 am
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[...]VOKLE | the awesomest blog in the universe! » Blog Archive » Why IE doesn’t drop Flash NetConnections / NetStreams and how to fix it.[...]…