Hey there! I have a problem with CRC in account activity api for twitter api premium version 1.1 i basically copy the CRC code (Securing webhooks | Docs | Twitter Developer Platform) modules i use: hmac, hashlib, base64. I also use flask for the webapp and also replit’s IDE for the coding process.
My Code:
@app.route('/webhook/twitter', methods=['GET'])
def webhook_challenge():
sha256_hash_digest = hmac.new(os.environ["api_key_secret"], msg=request.args.get('crc_token'), digestmod=hashlib.sha256).digest()
response = {
'response_token': 'sha256=' + base64.b64encode(sha256_hash_digest)
}
return json.dumps(response)
The Error:
* Serving Flask app 'app' (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
* Running on all addresses.
WARNING: This is a development server. Do not use it in a production deployment.
* Running on http://172.18.0.25:8080/ (Press CTRL+C to quit)
[2021-12-05 09:42:18,995] ERROR in app: Exception on /webhook/twitter [GET]
Traceback (most recent call last):
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py", line 2070, in wsgi_app
response = self.full_dispatch_request()
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py", line 1515, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py", line 1513, in full_dispatch_request
rv = self.dispatch_request()
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py", line 1499, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
File "main.py", line 33, in webhook_challenge
sha256_hash_digest = hmac.new(os.environ["api_key_secret"], msg=request.args.get('crc_token'), digestmod=hashlib.sha256).digest()
File "/usr/lib/python3.8/hmac.py", line 153, in new
return HMAC(key, msg, digestmod)
File "/usr/lib/python3.8/hmac.py", line 48, in __init__
raise TypeError("key: expected bytes or bytearray, but got %r" % type(key).__name__)
TypeError: key: expected bytes or bytearray, but got 'str'
Note: twitter actually make the get request, flask log it and send it in my terminal, the problem is in the hmac. Because of this the api returns with this: Non-200 response code during CRC GET request (i.e. 404, 500, etc)
File “/usr/lib/python3.8/hmac.py”, line 48, in init
raise TypeError(“key: expected bytes or bytearray, but got %r” % type(key).name)
TypeError: key: expected bytes or bytearray, but got ‘str’
I think hmac.new takes bytes objects not strings, like this: convert String to Bytes object for hmac.new() in python 3 - Stack Overflow
Ahh yes my bad, my question is something like, which argument require bytes. Anyway thanks for the help Igor! Always come to help people 
Alright. I have another error saying my webhook url doesn’t match the requirements.
raceback (most recent call last):
File "main.py", line 58, in <module>
res = client.register_webhook("https://PyTweet.thekungfuchuck.repl.co/webhook/twitter", "Development")
File "/home/runner/PyTweet/pytweet/client.py", line 574, in register_webhook
res = self.http.request(
File "/home/runner/PyTweet/pytweet/http.py", line 190, in request
check_error(response)
File "/home/runner/PyTweet/pytweet/http.py", line 71, in check_error
raise BadRequests(response)
pytweet.errors.BadRequests: Request returned an Exception (status code: 400): Webhook URL does not meet the requirements. Invalid CRC token or json response format.
My code:
@app.route('/webhook/twitter', methods=['GET'])
def webhook_challenge():
key = os.environ["api_key_secret"].encode("utf-8")
msg = request.args.get('crc_token').encode("utf-8")
key = base64.b64encode(key)
sha256_hash_digest = hmac.new(
key,
msg=msg,
digestmod=hashlib.sha256
).digest()
response = {
'response_token': 'sha256=' + base64.b64encode(sha256_hash_digest).decode("utf-8")
}
return json.dumps(response)
Its probably invalid, but i tried the old way doing it (where it was explained in the docs) but it doesnt work probably because th packages are outdated, so do you know how am i able to make CRC challenge?
system
Closed
#7
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.
