response.out.write in python, google app engine not displaying on local host

Question

my yaml file:

application: testprogram
version: 1
runtime: python
api_version: 1

handlers:
- url: /.*
  script: main.py

my python file:

import webapp2

class MainPage(webapp2.RequestHandler):
    def get(self):
        self.reponse.headers['Content-Type'] = 'text/plain'
        self.response.out.write("Hurray for cake!")

app = webapp2.WSGIApplication([('/', MainPage)],debug=True)

from the sever:

$ dev_appserver.py testprogram
WARNING  2016-09-01 05:42:36,253 application_configuration.py:165] The "python" runtime specified in "testprogram/app.yaml" is not supported - the "python27" runtime will be used instead. A description of the differences between the two can be found here:
https://developers.google.com/appengine/docs/python/python25/diff27
INFO     2016-09-01 05:42:36,265 sdk_update_checker.py:229] Checking for updates to the SDK.
INFO     2016-09-01 05:42:36,400 sdk_update_checker.py:257] The SDK is up to date.
WARNING  2016-09-01 05:42:36,635 simple_search_stub.py:1146] Could not read search indexes from /tmp/appengine.testprogram.rickus/search_indexes
INFO     2016-09-01 05:42:36,639 api_server.py:205] Starting API server at: http://localhost:40100
INFO     2016-09-01 05:42:36,642 dispatcher.py:197] Starting module "default" running at: http://localhost:8080
INFO     2016-09-01 05:42:36,643 admin_server.py:116] Starting admin server at: http://localhost:8000
INFO     2016-09-01 05:42:51,325 module.py:788] default: "GET / HTTP/1.1" 200 -

sever is up. Local host is up. But nothing is being written out. I am doing udacitys course so I have just began. What could the hang up be. Been checking the docs and still lost.

Answer 1

In the .yaml file, point the routing handler to main.app (not main.py).

You also have have typo in your python file. response is missing the first 's':

self.reponse.headers['Content-Type'] = 'text/plain'

should be

self.response.headers['Content-Type'] = 'text/plain'

Answer 2

You have a problem in app.yaml file in the handlers section:

Yours:

application: testprogram
version: 1
runtime: python
api_version: 1

handlers:
- url: /.*
  script: main.py

but you should have:

application: testprogram
version: 1
runtime: python27
api_version: 1
threadsafe: yes

handlers:
- url: /.*
  script: main.app