How to let Flash app communicate with server?

What's an easy and secure way to let my Flash app communicate with my back-end server?

The Flash app, whi开发者_StackOverflow中文版ch is a video player, should retrieve the person's username and send back an ID. How would I do this?

Note: Back-end is written in Javascript.

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If you want to connect flash with JS to actionscript use ExternalInterface. If you want to connect to e.g. PHP use NetConnection or UrlLoader

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I've used XML-RPC in a Flash client before. I've gotten it to work pretty well too.

I've personally used this Action Script 3 implementation:

http://danielmclaren.com/2007/08/03/xmlrpc-for-actionscript-30-free-library

Of course, the server I was talking with was Java/Tomcat. However, I'm pretty sure there are XML-RPC implementations for JavaScript; a quick search found this:

http://phpxmlrpc.sourceforge.net/jsxmlrpc/

Don't know how much setup/overhead it would be for you server-wise, but I've had success with that protocol.