Flask_Sockets is incompatible with Flask 2 causing Python server to fail

[priyankark]

User reported getting the following issue:

Traceback (most recent call last): File "C:\Users\MasterS\AppData\Roaming\Python\Python39\site-packages\gevent\pywsgi.py", line 999, in handle_one_response self.run_application() File "C:\Users\MasterS\AppData\Roaming\Python\Python39\site-packages\geventwebsocket\handler.py", line 75, in run_application self.run_websocket() File "C:\Users\MasterS\AppData\Roaming\Python\Python39\site-packages\geventwebsocket\handler.py", line 52, in run_websocket list(self.application(self.environ, lambda s, h, e=None: [])) File "C:\Users\MasterS\AppData\Roaming\Python\Python39\site-packages\flask\app.py", line 2088, in __call__ return self.wsgi_app(environ, start_response) File "C:\Users\MasterS\AppData\Roaming\Python\Python39\site-packages\flask_sockets.py", line 40, in __call__ handler, values = adapter.match() File "C:\Users\MasterS\AppData\Roaming\Python\Python39\site-packages\werkzeug\routing.py", line 2030, in match raise WebsocketMismatch() werkzeug.routing.WebsocketMismatch: 400 Bad Request: The browser (or proxy) sent a request that this server could not understand. 2021-05-28T20:45:50Z {'REMOTE_ADDR': '192.168.0.14', 'REMOTE_PORT': '43050', 'HTTP_HOST': '192.168.0.4:5000', (hidden keys: 26)} failed with WebsocketMismatch

[priyankark]

Related Issue 1
Related Issue 2

[priyankark]

Please use a version < 2 until this issue is fixed. Will close this issue once the root issue gets fixed.
You can also consider using the Node server instead.

[priyankark]

Fix for now: clone the repo.
pip uninstall flask #Uninstalls flask 2.x
pip install -r requirements.txt #force installs flask 1.1.4

The original issue needs to be fixed by the Flask_Socket team.

[rajeshr6r]

For me adding markupsafe along with downgrading Flask to 1.1.4 worked .

Flask==1.1.4
Flask-Sockets==0.2.1
google-cloud-speech==2.0.1
markupsafe==2.0.1