Flex Reader on Google App Engine

<?xml version="1.0" encoding="utf-8"?>
<iic:ClosableTitleWindow xmlns:mx="http://www.adobe.com/2006/mxml" title="Add Comment"
    xmlns:iic="net.ivanidris.flex.components.*">
   <mx:Script>
        <![CDATA[
            import flash.net.navigateToURL;
          import flash.net.URLRequest;
          import flash.net.URLVariables;
 
 
            public function onAdd():void {
                useHttpService();
            }
 
            public function useHttpService():void {
                var request:URLRequest = new URLRequest("/addComment.py");
                request.method = URLRequestMethod.POST;
                var variables:URLVariables = new URLVariables();
               variables.comments = this.comments.text;
               variables.url = this.url.text;
               variables.title = this.t.text;
                variables.rating = this.rating.value; 
               request.data = variables;
               navigateToURL(request);
 
                removeMe();
            }
        ]]>
    </mx:Script>
    <mx:Form>
      <mx:FormItem label="Fill in comment">
         <mx:TextArea id="comments"/>
      </mx:FormItem>
      <mx:FormItem label="Rating">
         <mx:NumericStepper id='rating'/>
      </mx:FormItem>
      <mx:FormItem>
         <mx:Button id="addComment" label="Add Comment" click="onAdd();"/> 
      </mx:FormItem>
   </mx:Form>
    <mx:Label x="63" y="170" text="Label" enabled="true" id="url" visible="false"/>
    <mx:Label x="97" y="205" text="Label" id="t" visible="false" enabled="true"/>
</iic:ClosableTitleWindow>

import cgi
from net.ivanidris.flexreader import Feed
from google.appengine.api import users
from google.appengine.ext import webapp
from google.appengine.ext.webapp.util import run_wsgi_app
 
class MainPage(webapp.RequestHandler):
  def post(self):
    user = users.get_current_user()
 
    if user:
        self.putComment()
    else:
      self.redirect(users.create_login_url(self.request.uri))
 
  def putComment(self):
   form = cgi.FieldStorage()
   comments = form.getfirst("comments", "")
   rating = form.getfirst("rating", "0")
   url = form.getfirst("url", "")
   title = form.getfirst("title", "")
 
   comment = Feed.EntryComment(key_name = url, link = url, title = title, 
                               rating = int(rating), comments = comments, user = users.get_current_user())
   comment.put()
 
application = webapp.WSGIApplication(
                                     [('/addComment.py', MainPage)],
                                     debug=True)
 
def main():
  run_wsgi_app(application)
 
if __name__ == "__main__":
  main()