Leaving A Message For A Rockstar with Python and Twilio

from flask import Flask, request
from twilio.twiml.voice_response import VoiceResponse, Gather


app = Flask(__name__)


@app.route("/voice", methods=['GET', 'POST'])
def welcome():
    """
    Twilio voice webhook for incoming calls.
    Respond with a welcome message and ask them to press 1
    to record a message for the band.
    """
    # Start our TwiML response
    resp = VoiceResponse()

    # <Say> a welcome message
    resp.say("Welcome to the band's line")
    resp.say("Press 1 to record a message for the band")

    # <Gather> a response from the caller
    resp.gather(numDigits=1, action='/start-recording')

    return str(resp)

@app.route('/start-recording', methods=['GET', 'POST'])
def start_recording():
    """Processes the caller's <Gather> input from the welcome view"""
    # Start our TwiML response
    resp = VoiceResponse()

    # If the caller pressed one, start the recording
    if 'Digits' in request.values and request.values['Digits'] == '1':
        resp.say('Awesome. Leave a message after the tone.')
        resp.record(max_length="30", action="/end-call")

    # Otherwise, say we didn't understand the caller and ask them to try again
    else:
        resp.say("Sorry, I didn't understand that.")
        resp.say("Press 1 to record a message for the band")
        resp.gather(numDigits=1, action='/start-recording')

    return str(resp)

@app.route('/end-call', methods=['GET', 'POST'])
def end_call():
    """Thanks a caller for their recording and hangs up"""
    # Start our TwiML response
    resp = VoiceResponse()

    # <Say> thanks to the caller
    # (Add your signoff as you see fit)
    resp.say("Thanks for your message. The band will be stoked.")
    resp.hangup()

    return str(resp)

if __name__ == "__main__":
    app.run(debug=True)