add requirements.txt and switch to flask

Author: proppy

Dockerfile

@@ -3,5 +3,7 @@
 FROM google/appengine-python27
 
 RUN apt-get update && apt-get install -y fortunes
+ADD requirements.txt /home/vmagent/app/
+RUN pip install -r requirements.txt
 
 ADD . /home/vmagent/app/

main.py

@@ -1,20 +1,16 @@
-import webapp2
+from flask import Flask, helpers
 import subprocess
 
-MESSAGES = '/tmp/messages.txt'
+app = Flask(__name__)
 
-class HelloHandler(webapp2.RequestHandler):
-  def get(self):
-    msg = subprocess.check_output('/usr/games/fortune')
-    with open(MESSAGES, 'a') as f: f.write(msg)
-    self.response.headers['Content-Type'] = 'text/plain'
-    self.response.out.write(msg)
+MESSAGES = '/tmp/messages.txt'
 
-class MessagesHandler(webapp2.RequestHandler):
-  def get(self):
-    with open(MESSAGES, 'r') as f:
-      for msg in f: self.response.out.write(msg)
+@app.route("/")
+def fortune():
+  msg = subprocess.check_output('/usr/games/fortune')
+  with open(MESSAGES, 'a') as f: f.write(msg)
+  return msg
 
-app = webapp2.WSGIApplication([('/', HelloHandler),
-                               ('/messages', MessagesHandler)],
-                               debug=True)
+@app.route("/messages")
+def messages():
+  return helpers.send_file(MESSAGES)