Flask, Python 3, and WebSockets

Question

How can I serve a websockets endpoint from Flask running on Python 3? This seems near impossible. Note, I do not want SocketsIO or anything like that. Just want to be able, from plain JavaScript following the very simple HTML5 standard, connect to to a Flask endpoint and upgrade it to a Websocket for bidirectional communication. Example JS below

var ws = new WebSocket("ws://localhost:5000/echo");

I assumed this would be a simple matter of pip install ing the right module, but no. Any ideas? Should I write my own Python module for this?

Answer 1

Unfortunately this is currently not supported. Possible workarounds below

• Go node.js.
• Go python2
• Fix the existing flask-sockets module, issue here .
• Take it on yourself to write a python3 aware python module

Answer 2

您是否查看过Flask-SocketIO提供的功能？

pip install flask-socketio