app.py

import os

from flask import Flask
from flask import render_template
from flask import url_for
from flask import request

from twilio import twiml
from twilio.rest import TwilioRestClient
from twilio.util import TwilioCapability


# Declare and configure application
app = Flask(__name__, static_url_path='/static')
app.config.from_pyfile('local_settings.py')


# Voice Request URL
@app.route('/voice', methods=['GET', 'POST'])
def voice():
    message = request.args['message']
    language = request.args['language']
    response = twiml.Response()
    response.say(message, voice="woman", language=language)
    return str(response)


# SMS Request URL
@app.route('/sms', methods=['GET', 'POST'])
def sms():
    response = twiml.Response()
    response.sms("Congratulations! You deployed the Twilio Hackpack" \
            " for Heroku and Flask.")
    return str(response)


# Twilio Client demo template
@app.route('/client')
def client():
    configuration_error = None
    for key in ('TWILIO_ACCOUNT_SID', 'TWILIO_AUTH_TOKEN', 'TWILIO_APP_SID',
            'TWILIO_CALLER_ID'):
        if not app.config[key]:
            configuration_error = "Missing from local_settings.py: " \
                    "%s" % key
            token = None
    if not configuration_error:
        capability = TwilioCapability(app.config['TWILIO_ACCOUNT_SID'],
            app.config['TWILIO_AUTH_TOKEN'])
        capability.allow_client_incoming("joey_ramone")
        capability.allow_client_outgoing(app.config['TWILIO_APP_SID'])
        token = capability.generate()
    params = {'token': token}
    return render_template('client.html', params=params,
            configuration_error=configuration_error)


# Installation success page
@app.route('/')
def index():
    params = {
        'Voice Request URL': url_for('.voice', _external=True),
        'SMS Request URL': url_for('.sms', _external=True),
        'Client URL': url_for('.client', _external=True)}
    return render_template('index.html', params=params,
            configuration_error=None)

@app.route('/callmemaybe', methods=['GET', 'POST'])
def callmemaybe():
    configuration_error = None
    for key in ('TWILIO_ACCOUNT_SID', 'TWILIO_AUTH_TOKEN', 'TWILIO_APP_SID',
            'TWILIO_CALLER_ID'):
        if not app.config[key]:
            configuration_error = "Missing from local_settings.py: " \
                    "%s" % key
            token = None
    if not configuration_error:
        try:
            message = request.form['message']
            number = request.form['number']
            language = request.form['language']
        except Exception:
            message = False
        if message:
            client = TwilioRestClient(app.config['TWILIO_ACCOUNT_SID'],
                    app.config['TWILIO_AUTH_TOKEN'])
            call = client.calls.create(to=number,
                    from_=app.config['TWILIO_CALLER_ID'],
                    url=url_for('.voice',
                        message=message,
                        language=language,
                        _external=True))
    return render_template('callmemaybe.html',
            configuration_error=configuration_error)

# If PORT not specified by environment, assume development config.
if __name__ == '__main__':
    port = int(os.environ.get("PORT", 5000))
    if port == 5000:
        app.debug = True
    app.run(host='0.0.0.0', port=port)