angular 2 app engine - front end post request to back end - angularjs

Question

Hi I have an angular 2 application which i would like to deploy to gae. So back end I am using app engine python. I am trying to do a simple post request from angular front end to app engine python. So following is my app.yaml
runtime: python27
api_version: 1
threadsafe: true
service: federation-bipedal-hominids
handlers:
- url: /.*
script: main.app
- url: (.*)/
static_files: federation-bipedal-hominids/src/app\1/index.html
upload: app
- url: (.*)
static_files: app/home\1
upload: app
main.py
import json
import webapp2
import time
# app = StaticURLParser("federation-bipedal-hominids")
def AsDict():
return {"Hello World !": "try now"}
class RestHandler(webapp2.RequestHandler):
def dispatch(self):
#time.sleep(1)
super(RestHandler, self).dispatch()
def SendJson(self, r):
self.response.headers['content-type'] = 'text/plain'
self.response.write(json.dumps(r))
class HelloWorld(RestHandler):
def post(self):
r = AsDict()
self.SendJson(r)
class QueryHandler(RestHandler):
def get(self):
r = AsDict()
self.SendJson(r)
app = webapp2.WSGIApplication([
('/HelloWorld', HelloWorld)
], debug=True)
now, how should i do it from angular front end ?