Restful Communication Between Flex And Rails (GET, POST, PUT)

  <mx:HTTPService id="svcShiftsCreate"
      contentType="application/xml"
      resultFormat="e4x"
      method="POST"
      fault="handleShiftsCreateFaultResult(event)"
      result="handleShiftsCreateResult(event)" 
    />  

  // HTTPService POST Request
  private function handleShiftCreated(event:ShiftControllerEvent):void {
    svcShiftsCreate.url = "/schedules/" + scheduleId + 
                          "/shifts.xml?authenticity_token="+authenticityToken;

    var xmlParams:XML = XML(
      '<shift>'+
        '<category_id>1</category_id>'+
      '</shift>'
    );

    svcShiftsCreate.send(xmlParams);
    ShiftSequencer.reDrawShifts();
  }  

  <mx:HTTPService id="svcShiftsUpdate"
      contentType="application/xml"  
      resultFormat="e4x"
      result="handleShiftsUpdateResult(event)"
      fault="handleShiftsUpdateFaultResult(event)"
    />