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**Modified from original example by Sharriff Aina**

I would explain with a very simple example how you can create Flash RPC applications using Web2py as a RPC service provider. I expect you to be familiar with the following topics as they are beyond the scope of this HowTo: Actionscript programming

- RPC Web services
- AMF
- Web2PY programming

Lets create a simple service that takes 2 numerical values, adds them together and returns the sum. We would call the service ``addNumbers``. Create a flash file using Adobe Flash (all versions as from MX 2004), in the first frame of the file, add these lines:
	
    import mx.remoting.Service;
    import mx.rpc.RelayResponder;
    import mx.rpc.FaultEvent;
    import mx.rpc.ResultEvent;
    import mx.remoting.PendingCall;

val1 = 23;
    val2 = 86;

service = new Service("http://localhost:8000/pyamf_test/default/run/amfrpc", null, null, null, null);
    var pc:PendingCall = service.addNumbers(val1, val2);
    pc.responder = new RelayResponder(this, "onResult", "onFault");

function onResult(re:ResultEvent):Void {
        trace("Result : " + re.result);
        txt_result.text = re.result;
    }

function onFault(fault:FaultEvent):Void {
        trace("Fault: " + fault.fault.faultstring);
    }
    stop();

The last thing to do would be to create a dynamic text field called ``txt_result`` and place it on the stage.

As you have noticed, we have imported the mx remoting classes to enable Remoting in Flash, you can get them here. I would be using the Actionscript version 2 version of the classes. Add the path of the classes to your class path in the Adobe Flash IDE or just place the ``mx`` folder next to the newly created file. Compile and export(publish) the swf flash file as ``pyamf_test.swf``.

Lets set up the gateway in Web2Py as we defined in our Flash file, create a new appliance, ``pyamf_test``, in the ``default`` controller, create a function called ``gateway`` and add these lines to it:

from gluon.tools import Service
    service=Service(globals())

# expose all services
    def call(): return service()

# define a Flax (AMF) service
    @service.amfrpc
    def addNumbers(val1, val2):
        return val1 + val2

Next, place the pyamf_test.amf, pyamf_test.html, AC_RunActiveContent.js, crossdomain.xml files in the ``static`` folder of the pyamf_test controller,fireup web2py using 8000 as the server port, point your browser to
<http://localhost:8000/pyamf_test/static/pyamf_test.html>
and see the result of the ``addNumbers`` function displayed in the textfield.

AlterEgo

old web2py blog

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