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app.py
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app.py
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import random
from flask import Flask, request
from pymessenger.bot import Bot
app = Flask(__name__) # Initializing our Flask application
ACCESS_TOKEN = 'GENERATED_TOKEN_FROM_FACEBOOK'
VERIFY_TOKEN = 'UNIQE_TOKEN'
bot = Bot(ACCESS_TOKEN)
# Importing standard route and two requst types: GET and POST.
# We will receive messages that Facebook sends our bot at this endpoint
@app.route('/', methods=['GET', 'POST'])
def receive_message():
if request.method == 'GET':
# Before allowing people to message your bot Facebook has implemented a verify token
# that confirms all requests that your bot receives came from Facebook.
token_sent = request.args.get("hub.verify_token")
return verify_fb_token(token_sent)
# If the request was not GET, it must be POSTand we can just proceed with sending a message
# back to user
else:
# get whatever message a user sent the bot
output = request.get_json()
for event in output['entry']:
messaging = event['messaging']
for message in messaging:
if message.get('message'):
# Facebook Messenger ID for user so we know where to send response back to
recipient_id = message['sender']['id']
if message['message'].get('text'):
response_sent_text = get_message()
send_message(recipient_id, response_sent_text)
# if user send us a GIF, photo, video or any other non-text item
if message['message'].get('attachments'):
response_sent_text = get_message()
send_message(recipient_id, response_sent_text)
return "Message Processed"
def verify_fb_token(token_sent):
# take token sent by Facebook and verify it matches the verify token you sent
# if they match, allow the request, else return an error
if token_sent == VERIFY_TOKEN:
return request.args.get("hub.challenge")
return 'Invalid verification token'
def get_message():
sample_responses = ["You are stunning!", "We're proud of you",
"Keep on being you!", "We're greatful to know you :)"]
# return selected item to the user
return random.choice(sample_responses)
# Uses PyMessenger to send response to the user
def send_message(recipient_id, response):
# sends user the text message provided via input response parameter
bot.send_text_message(recipient_id, response)
return "success"
# Add description here about this if statement.
if __name__ == "__main__":
app.run()