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I'm trying to make a turn-based game in Godot that is hosted on an external server to prevent cheating. Websockets seem to be the best solution and Heroku apparently supports websockets. I'm trying to use flask-sockets to accomplish this but cannot get anything to work. I keep getting this error in my Heroku logs:

2022-08-10T01:13:42.934964+00:00 app[web.1]: Traceback (most recent call last):
2022-08-10T01:13:42.934997+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gevent/pywsgi.py", line 999, in handle_one_response
2022-08-10T01:13:42.934998+00:00 app[web.1]: self.run_application()
2022-08-10T01:13:42.935002+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/geventwebsocket/handler.py", line 75, in run_application
2022-08-10T01:13:42.935002+00:00 app[web.1]: self.run_websocket()
2022-08-10T01:13:42.935004+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/geventwebsocket/handler.py", line 52, in run_websocket
2022-08-10T01:13:42.935005+00:00 app[web.1]: list(self.application(self.environ, lambda s, h, e=None: []))
2022-08-10T01:13:42.935017+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 2548, in __call__
2022-08-10T01:13:42.935018+00:00 app[web.1]: return self.wsgi_app(environ, start_response)
2022-08-10T01:13:42.935029+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask_sockets.py", line 40, in __call__
2022-08-10T01:13:42.935029+00:00 app[web.1]: handler, values = adapter.match()
2022-08-10T01:13:42.935039+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/werkzeug/routing/map.py", line 622, in match
2022-08-10T01:13:42.935040+00:00 app[web.1]: raise WebsocketMismatch() from None
2022-08-10T01:13:42.935067+00:00 app[web.1]: werkzeug.routing.exceptions.WebsocketMismatch: 400 Bad Request: The browser (or proxy) sent a request that this server could not understand.
2022-08-10T01:13:42.935181+00:00 app[web.1]: 2022-08-10T01:13:42Z {'REMOTE_ADDR': '10.1.31.248', 'REMOTE_PORT': '12800', 'HTTP_HOST': 'reversertesterheroku.herokuapp.com', (hidden keys: 33)} failed with WebsocketMismatch

Here is my Flask app:

from flask import Flask
from flask_sockets import Sockets

app = Flask(__name__)
sockets = Sockets(app)

@sockets.route('/reverse')
def echo_socket(ws):
    while not ws.closed:
        message = ws.receive()
        ws.send(message[::-1])

@app.route('/')
def hello():
    return "Hello World!"

Every websocket testing method I use does not work so I am almost 100% certain something is wrong on the server side.

This is all of my Heroku files if everything above isn't enough. PLEASE help me find a solution or a working alternative.

General Grievance
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h1d34uz3hunt3r
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  • The `flask-sockets` module appears to be unmaintained: the [original repository](https://github.com/heroku-python/flask-sockets) has been archived, and the [fork linked from pypi](https://github.com/kennethreitz/flask-sockets) had the last release in 2016. I think you're going to need to look for an alternative solution. – larsks Aug 10 '22 at 02:38
  • @larsks Thanks, that's really unfortunate as the official [Heroku tutorial](https://devcenter.heroku.com/articles/python-websockets) uses this library. – h1d34uz3hunt3r Aug 10 '22 at 02:42
  • It looks like there is a mechanism for providing feedback at the bottom of that page. Probably worth mentioning it to them. – larsks Aug 10 '22 at 02:51

0 Answers0