Cairngorm Code

package samples
{
    import com.adobe.cairngorm.task.Task;

    import mx.rpc.events.FaultEvent;
    import mx.rpc.events.ResultEvent;
    import mx.rpc.http.HTTPService;

    /**
     * A task that performs a REST-ful request. This can be used directly in
     * task groups or else extended to create more specific tasks.
     */
    public class RestfulRequest extends Task
    {
        //------------------------------------------------------------------------
        //
        //  Private Variables
        //
        //------------------------------------------------------------------------

        private var service:HTTPService;

        //------------------------------------------------------------------------
        //
        //  Public Properties
        //
        //------------------------------------------------------------------------

        [Bindable]
        public var url:String;

        [Bindable]
        public var parameters:Object;

        [Bindable]
        public var resultFormat:String;

        [Bindable]
        public var resultData:Object;

        //------------------------------------------------------------------------
        //
        //  Implementation : WorkItem
        //
        //------------------------------------------------------------------------

        override protected function performTask():void
        {
            if (url == null)
                fault();

            service = new HTTPService();
            service.method = parameters == null ? "get" : "post";
            service.resultFormat = resultFormat;
            service.url = url;

            service.addEventListener(ResultEvent.RESULT, onResult);
            service.addEventListener(FaultEvent.FAULT, onFault);

            service.send(parameters);
        }

        //------------------------------------------------------------------------
        //
        //  Protected Methods
        //
        //------------------------------------------------------------------------

        protected function handleResultData(data:Object):void
        {
            // for optional overriding
        }

        protected function handleFaultInfo(info:Object):void
        {
            // for optional overriding
        }

        //------------------------------------------------------------------------
        //
        //  Event Handlers
        //
        //------------------------------------------------------------------------

        private function onResult(event:ResultEvent):void
        {
            cleanUp();
            resultData = event.result;
            handleResultData(resultData);
            complete();
        }

        private function onFault(event:FaultEvent):void
        {
            cleanUp();
            handleFaultInfo(event);
            fault(event.fault.faultString);
        }

        private function cleanUp():void
        {
            service.removeEventListener(ResultEvent.RESULT, onResult);
            service.removeEventListener(FaultEvent.FAULT, onFault);
            service = null;
        }
    }
}