I have created a messenger chatbot with flask, pymessenger and wit.ai.
I want to add facebook provided templates (like buttons, adding images and sound media)(https://developers.facebook.com/docs/messenger-platform/reference/template/button/)
There using some curl and json thing which I do not understand. Can some one help me, where should I put these snippet in my python code.
#app.route('/', methods=['POST'])
def webhook():
data = request.get_json()
log(data)
if data['object'] == 'page':
for entry in data['entry']:
for messaging_event in entry['messaging']:
sender_id = messaging_event['sender']['id']
recipient_id = messaging_event['recipient']['id']
if messaging_event.get('message'):
if 'text' in messaging_event['message']:
messaging_text = messaging_event['message']['text']
else:
messaging_text = 'no text'
response = None
entity, value = wit_response(messaging_text)
if entity == 'newstype':
response = "OK. I will send you {} news".format(str(value))
elif entity == 'cust_greet':
response = get_message()
elif entity == 'cust_bye':
response = "Bye! Have a Good Day!".format(str(value))
elif entity == 'cust_option':
response = "Option 1: Option 2:"
bot.send_text_message(sender_id, response)
return "ok", 200
def log(message):
print(message)
sys.stdout.flush()
HTTP requests use one of these two formats:
GET: All the request information is in the url
POST: Some information is sent via a JSON format to the url
What we see in the Facebook API is a POST request: the url is defined as
https://graph.facebook.com/v2.6/me/messages?access_token=<PAGE_ACCESS_TOKEN>
...and there is POST request information in the JSON section underneath
Curl is a program used to send HTTP requests from the terminal. If you install Curl, you can fill in the JSON/url information, run the command (which sends the POST request), and see the buttons pop up for the recipient. Just as you want your chatbot to do!
However, Curl is a tool, not a Python library!
To do this in Python, you can send the request through Python's built in libraries, or install a package which makes this easier (such as requests), look into "sending http requests via python".
Below is an example (adapted from this question):
from urllib.parse import urlencode
from urllib.request import Request, urlopen
# the url we are sending the request to
url = "https://graph.facebook.com/v2.6/me/..."
# the POST request data
request_data = {
"recipient": {
"id": "<PSID>"
},
"message": {
"attachment": {
...
}
}
}
# create the request with the url and the data
post_request = Request(url, urlencode(request_data).encode())
# send it to Facebook! Response is the API response from Facebook
response = urlopen(post_request).read().decode()
Related
I'm trying to login to a website via python to print the info. So I don't have to keep logging into multiple accounts.
In the tutorial I followed, he just had a login and password, but this one has
Website Form Data
Does the _wp attributes change each login?
The code I use:
mffloginurl = ('https://myforexfunds.com/login-signup/')
mffsecureurl = ('https://myforexfunds.com/account-2')
payload = {
'log': '*****#gmail.com',
'pdw': '*****'
'''brandnestor_action':'login',
'_wpnonce': '9d1753c0b6',
'_wp_http_referer': '/login-signup/',
'_wpnonce': '9d1753c0b6',
'_wp_http_referer': '/login-signup/'''
}
r = requests.post(mffloginurl, data=payload)
print(r.text)
using the correct details of course, but it doesn't login.
I tried without the extra wordpress elements and also with them but it still just goes to the signin page.
python output
different site addresses, different login details
Yeah the nonce will change with every new visit to the page.
I would use request.session() so that it automatically stores session cookies and all that good stuff.
Do a session.GET('some_login_page.com')
Parse with the response content with BeautifulSoup to retrieve the nonce.
Then add that into the payload of your POST request when you login.
A very quick and dirty example:
import requests
from bs4 import BeautifulSoup as bs
email = 'test#email.com'
password = 'password1234'
url = 'https://myforexfunds.com/account-2/'
# Start a session
with requests.session() as session:
# Send a GET request to the login page
r = session.get(url)
# Check if the request was successful
if r.status_code != 200:
print("Get Request Failed")
# Parse the HTML content of the page
soup = bs(r.content, 'lxml')
# Extract the value of the nonce from the HTML
nonce = soup.find(id='woocommerce-login-nonce')['value']
# Set up the login form data
params ={
"username": email,
"password": password,
"woocommerce-login-nonce": nonce,
"_wp_http_referer": "/account-2/",
"login": "Log+in"
}
# Send a POST request with the login form data
r = session.post(url, params=params)
# Check if the request was successful
if r.status_code != 200:
print("Login Failed")
I am trying to create a new table on Airtable with the aid of the post method. I have the following code :
# importing the requests library
import requests
# defining the api-endpoint
API_ENDPOINT = "https://api.airtable.com/v0/appa3r2UUo4JxpjSv/Table%201?api_key=MYKEY"
# data to be sent to api
data = {
'fields': {
'Name': 'Andromachis Row'
}
}
# sending post request and saving response as response object
r = requests.post(url = API_ENDPOINT, data = data)
# extracting response text
print(r.text)
Despite that when I run the script I get an error saying:
(mypyth) PS C:\Users\andri\PythonProjects\mypyth> py post_API.py
{"error":{"type":"INVALID_REQUEST_UNKNOWN","message":"Invalid request: parameter validation failed. Check your request data."}}
Does anyone understand why this happens? I am really desperate! Thanks in advance
I am creating a self built Python chatbot that does not use a chatbot platform such as Dialogflow. The issue is that there is no easy integration with messaging apps such as Messenger to connect it too. I am trying to create a webhook to Messenger using the Messenger Send API. I am looking at the documentation and it shows me how to request a POST api call. However when I look at examples online they all seem to deal with json values called "entry" and "messaging" which I can't find anywhere and can't seem to see why it is necessary. I was wondering how exactly the input body of a Messenger Send API looks like so I can call it appropriately and what json objects are in its body. This is what I have so far from following online examples. I am using Flask. And am using Postman to test this
#app.route("/webhook", methods=['GET','POST'])
def listen():
if request.method == 'GET':
return verify_webhook(request)
if request.method == 'POST':
payload = request.json
event = payload['entry'][0]['messaging']
for x in event:
if is_user_message(x):
text = x['message']['text']
sender_id = x['sender']['id']
respond(sender_id, text)
return "ok"
Below is what I think the body of the request looks like:
{
"object":"page",
"entry":[
{
"id":"1234",
"time":1458692752478,
"messaging":[
{
"message":{
"text":"book me a cab"
},
"sender":{
"id":"1234"
}
}
]
}
]
}
But it is unable to read this and gives me an error of:
File"/Users/raphael******/Documents/*****_Project_Raphael/FacebookWebHookEdition.py", line 42, in listen
event = payload['entry'][0]['messaging']
TypeError: 'NoneType' object is not subscriptable
Where am I going wrong that the webhook is not registering the body correctly as json objects?
Here is how we do it:
# GET: validate facebook token
if request.method == 'GET':
valid = messenger.verify_request(request)
if not valid:
abort(400, 'Invalid Facebook Verify Token')
return valid
# POST: process message
output = request.get_json()
if 'entry' not in output:
return 'OK'
for entry in output['entry']:
if 'messaging' not in entry:
continue
for item in entry['messaging']:
# delivery notification (skip)
if 'delivery' in item:
continue
# get user
user = item['sender'] if 'sender' in item else None
if not user:
continue
else:
user_id = user['id']
# handle event
messenger.handle(user_id, item)
# message processed
return 'OK'
EDIT:
If you are using postman, please make sure to also set Content-Type header to application/json, otherwise Flask can't decode it with request.json. I guess that's where None comes from in your case.
I am using Facebook Messenger and its send API. I also use ngrok as the server to handle the traffic. My chatbot worked fine a few days ago but now after a bit of debugging it seems that Messenger, with every input from the user, sends multiple post request one after the other very quickly. I had a thought if it might be latency issues as my chatbot that responds does take a while to process. My chatbot takes a long time due to all the requests but after a while it does manage to answer all the requests with a 200 response. If so how do I make Messenger not send multiple Post requests and flood my ngrok webhook? If it's something else how do I deal with the issue?
This is the code that listens to the requests:
#app.route("/webhook", methods=['GET','POST'])
def listen():
"""This is the main function flask uses to
listen at the `/webhook` endpoint"""
if request.method == 'GET':
return verify_webhook(request)
if request.method == 'POST':
payload = request.get_json()
print(payload)
event = payload['entry'][0]['messaging']
for x in event:
if is_user_message(x):
text = x['message']['text']
sender_id = x['sender']['id']
respond(sender_id, text)
return "ok", 200
You can read about webhooks here. It does not look like you can change the timeout period.
Webhook Performance Requirements
Your webhook should meet the following minimum performance standards:
Respond to all webhook events with a 200 OK.
Respond to all webhook events in 20 seconds or less.
If you would want to implement a multiprocessing solution it may look like this:
from threading import Thread as Sub
#app.route("/webhook", methods=['GET','POST'])
def listen():
"""This is the main function flask uses to
listen at the `/webhook` endpoint"""
if request.method == 'GET':
return verify_webhook(request)
if request.method == 'POST':
payload = request.get_json()
print(payload)
event = payload['entry'][0]['messaging']
for x in event:
if is_user_message(x):
text = x['message']['text']
sender_id = x['sender']['id']
sub = Sub(target=respond, args=[sender_id, text])
sub.start()
return "ok", 200
If this gives you issues with shared scope or with flask itself, consider using multiprocessing instead. For this simply switch to
from multiprocessing import Process as Sub
I have a flask app deployed to Heroku and would like to receive text from Chatfuel (bot building platform) and send back texts in return.
Now, what I did is to use my heroku app as a web-hook, so that Chatfuel can make a simple GET or POST query to my API. The problem is that I have no experience with Flask or APIs, so I am not sure about how my app can receive information (in json format) and send it back to chatfuel.
This is what I wrote so far:
import os
import sys
import json
import requests
from flask import Flask, jsonify, render_template, request
app = Flask(__name__)
#app.route('/', methods=['GET'])
def verify():
# when the endpoint is registered as a webhook, it must echo back
# the 'hub.challenge' value it receives in the query arguments
if request.args.get("hub.mode") == "subscribe" and request.args.get("hub.challenge"):
if not request.args.get("hub.verify_token") == os.environ["VERIFY_TOKEN"]:
return "Verification token mismatch", 403
return request.args["hub.challenge"], 200
return "Hello world", 200
#app.route("/json", methods=['GET','POST'])
def json():
url = "chatfuel_api"
data = json.load(urllib2.urlopen(url))
if request.json:
mydata = request.json
return "Thanks",200
else:
return "no json received"
#app.route('/hello', methods = ['GET','POST'])
def api_echo():
if request.method == 'GET':
return "ECHO: GET\n",200
if __name__ == '__main__':
app.run(debug=True)
The verify() function works, as I see an 'Hello world' message if I run the app locally. However, both json() and api_echo() don't work, and when my server receives a get or post request from chatfuel, it returns a 404 error.
As you can see, I really have a lot of confusion, and your help would be really invaluable.
Thanks
You need to make sure you have registered the proper webhook url with Chatfuel. For the code you currently have, to hit the json endpoint the url would be https://www.your_server.com/json
The verify route looks like the hub challenge FB sends, so you would have to register the root of your site (that is, with your current code) with FB to hit the verify function. That url would look like this https://www.your_site.com/