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POTo execute Flex cleanup function when browser is closed by user
 

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    <p>I have a Flex client application. I need a clean up function to run in Flex when the user closes the browser. I found the following solution on the net, but it only works half-way for me. How could I fix it? <em>Thanks in advance for any responses!</em> <br/></p> <h2>Symptoms</h2> <ul> <li><code>CustomEvent</code> triggered, but not executed. <br/> >> EventHandler for <code>CustomEvent.SEND_EVENTS</code> is defined by a Mate EventMap. All the handler does is to call an <code>HTTPServiceInvoker</code>. In debug console, I'm able to see the handler and HTTPServiceInvoker being triggered, but neither the <code>resultHandlers</code> nor the <code>faultHandlers</code> were called. I know this event handler has no problem because when I dispatch the same <code>CustomEvent.SEND_EVENTS</code> in a button click handler, it behaves exactly as I expected) <li>Browser seems to wait for cleanUp function to complete before it closes. (all traces were printed before browser closes down) </ul> <h2>Code</h2> <p>I added the following into the index.template.html</p> <pre><code>window.onbeforeunload = clean_up; function clean_up() { var flex = document.${application} || window.${application}; flex.cleanUp(); } </code></pre> <p>And used the following in the application MXML file</p> <pre><code>import flash.external.ExternalInterface; public function init():void { ExternalInterface.addCallback("cleanUp",cleanUp); } public function cleanUp():void { var newEvent:CustomEvent = new CustomEvent(CustomEvent.SEND_EVENTS); newEvent.requestObj = myFormModel; dispatchEvent(newEvent); // for testing purposes // to see whether the browser waits for Flex cleanup to finish before closing down var i:int; for (i=0; i&lt;10000; i++){ trace(i); } } </code></pre> <h2>My Setup</h2> <ul> <li>FlexBuilder 3 <li>Mate MVC Framework (Mate_08_9.swc) <li>FlashPlayer 10 </ul>
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