done with exercise 2 up to creating the submit button

src/02-shipping/PlainText.mxml

@@ -1,9 +1,47 @@
 <mx:Application name=""
-    xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
-    <mx:Label x="54" y="25" text="Zip Code"/>
-    <mx:Label x="65" y="51" text="Weight"/>
-    <mx:TextInput x="128" y="23" id="zipcode"/>
-    <mx:TextInput x="128" y="49" id="weight_lb"/>
-    <mx:Button x="128" y="79" label="Get Shipping Options"/>
-    <mx:TextArea x="339" y="24" width="198" height="77" id="shippingOptions"/>
+    xmlns:mx="http://www.adobe.com/2006/mxml"
+    layout="absolute"
+    backgroundColor="#FFFFFF"
+    backgroundImage="">
+
+  <mx:Script>
+  <![CDATA[
+
+    import mx.rpc.events.ResultEvent;
+    import mx.rpc.events.FaultEvent;
+    import mx.controls.Alert;
+
+
+    private function handlePlain(event:ResultEvent):void
+    {
+        shippingOptions.htmlText = event.result.toString();
+    }
+
+
+    private function handleFault(event:FaultEvent):void
+    {
+        Alert.show(event.fault.faultString, "Error");
+    }
+
+  ]]>
+  </mx:Script>
+
+  <mx:HTTPService id="plainRPC" url="http://localhost:18080/text"
+      result="handlePlain(event)"
+      fault="handleFault(event)"
+      resultFormat="text">
+    <mx:request xmlns="">
+      <zipcode>{zipcode.text}</zipcode>
+      <pounds>{weight_lb.text}</pounds>
+    </mx:request>
+  </mx:HTTPService>
+
+  <mx:Label x="54" y="25" text="Zip Code"/>
+  <mx:Label x="65" y="51" text="Weight"/>
+  <mx:TextInput x="128" y="23" id="zipcode"/>
+  <mx:TextInput x="128" y="49" id="weight_lb"/>
+  <mx:Button x="128" y="79" label="Get Shipping Options"
+      click="plainRPC.send();" />
+  <mx:TextArea x="339" y="24" width="198" height="77" id="shippingOptions"/>
+
 </mx:Application>

src/02-shipping/shipping.py

@@ -19,6 +19,7 @@ def shipping_app(environ, start_response):
     handler = {
         'text': plaintext_handler,
         'xml': xml_handler,
+        'crossdomain.xml': crossdomain_xml_handler,
     }.get(path_info)
 
     if handler:
@@ -48,8 +49,8 @@ def get_params(environ):
 
 def xml_handler(environ, start_response):
     params = get_params(environ)
-    zipcode = int(params.get('zipcode', 0))
-    pounds = int(params.get('pounds', 0))
+    zipcode = int(float(params.get('zipcode', 0)))
+    pounds = int(float(params.get('pounds', 0)))
 
     ret = ['<options>']
     for service, price in get_shipping_options(zipcode, pounds).iteritems():
@@ -67,8 +68,8 @@ def xml_handler(environ, start_response):
 
 def plaintext_handler(environ, start_response):
     params = get_params(environ)
-    zipcode = int(params.get('zipcode', 0))
-    pounds = int(params.get('pounds', 0))
+    zipcode = int(float(params.get('zipcode', 0)))
+    pounds = int(float(params.get('pounds', 0)))
 
     ret = []
     for service, price in get_shipping_options(zipcode, pounds).iteritems():
@@ -82,6 +83,21 @@ def plaintext_handler(environ, start_response):
     return [body]
 
 
+def crossdomain_xml_handler(environ, start_response):
+    start_response('200 OK', [
+        ('content-type', 'text/xml'),
+        ('content-length', str(len(XD_XML))),
+    ])
+    return [XD_XML]
+
+
+XD_XML = """\
+<cross-domain-policy>
+  <allow-access-from domain="*"/>
+</cross-domain-policy>
+"""
+
+
 def get_shipping_options(zipcode, pounds):
     base_cost = (float(zipcode) / 10000.0) + (pounds * 5.0)
     return {