bot.py

import os
from flask import Flask
from flask import request
import json
import requests
import urllib2, urllib

import config

app = Flask(__name__)

def send_message(sender_id, text):
  try:
    str = urllib.quote(text)
    opener = urllib2.build_opener()
    opener.addheaders = [("X-Mashape-Authorization", config.MASHAPE_AUTHORIZATION)]
    socket = opener.open('https://yoda.p.mashape.com/yoda?sentence=' +
      str)
    content = socket.read()
    text = "Yoda says: " + content
    json_data = {
  		"recipient": {"id": sender_id},
  		"message": {"text": text}
  	}
    params = {
  		"access_token": config.FB_MESSENGER_TOKEN
  	}
    r = requests.post('https://graph.facebook.com/v2.6/me/messages', json=json_data, params=params)
    print(r, r.status_code, r.text)
  except:
    pass


@app.route("/", methods=['POST', 'GET'])
def main():
  if request.method == 'GET':
    verification_code = 'bot_this_is_of_yoda'
    verify_token = request.args.get("hub.verify_token")
    if verification_code == verify_token:
      return request.args.get("hub.challenge")
    else:
      return 'hello world'

  elif request.method == 'POST':
    print 'hello'
    body = request.data
    print "BODY" + body
    messaging_events = json.loads(body)['entry'][0]['messaging']
    for event in messaging_events:
      sender = event['sender']['id']
      if event.get('message') and event['message'].get('text'):
        text = event['message']['text']
        # sender = messaging_events[0]['sender']['id']
        # text = messaging_events[0]['message']['text']
        send_message(sender, text)
    return 'received'
  else:
		return 'Error'


if __name__ == "__main__":
	# The default port of 5000 that a Flask app starts on does not work
	# for a Heroku deployment. Instead, you need to get the PORT environment
	# variable (that is set in each Heroku deployment environment, or dyno) 
	# and start the app listening on that port
	# Read http://virantha.com/2013/11/14/starting-a-simple-flask-app-with-heroku/
	app.debug = True
	port = int(os.environ.get("PORT", 8000))
	app.run(host='0.0.0.0', port=port)