Hello world Plivo example using Flask

helloworld.py

############################################
# host/port binding for http server
HOST = '0.0.0.0'
PORT = 5000
############################################

from flask import Flask, render_template
import plivohelper
import os


response_server = Flask("ResponseServer")
response_server.debug = True

"""
This is a simple example which demonstrate how easy you can build a light HTTP
server using Flask which will return formatted XML to command the Plivo Server

By default the HTTP Server will be listening on http://127.0.0.1:5000

The following URLs are implemented:
    * /answered/
    * /hangup/
"""


@response_server.route('/heartbeat/', methods=['POST'])
def heartbeat():
    return "OK"

@response_server.route('/hangup/', methods=['POST'])
def hangup():
    return "OK"

@response_server.route('/answered/', methods=['POST'])
def answered():
    r = plivohelper.Response()
    r.addSpeak("Hello world")

    print "RESTXML Response => %s" % r
    return render_template('response_template.xml', response=r)


if __name__ == '__main__':
    if not os.path.isfile("templates/response_template.xml"):
        print "Error : Can't find the XML template : templates/response_template.xml"
    else:
        response_server.run(host=HOST, port=PORT)