I am using python socketio for communication and it works well for http. Have a problem when upgraded it to work with SSL.
I made a self-signed root certificate (CA), and issued server.cert and server.key. I told the computer to trust the CA. After that, I added the server.cert and server.key on the flask-socketio server side. And the code looks like this:
from flask import Flask, render_template
from flask_socketio import SocketIO
from flask_socketio import Namespace
app = Flask(__name__, template_folder="templates")
app.config['SECRET_KEY'] = 'secret!'
socketio = SocketIO(app)
# Create a URL route in our application for "/"
@app.route('/')
def home():
"""
This function loads the homepage
"""
return render_template('index.html')
class MyCustomNamespace(Namespace):
def on_connect(self):
print("Client just connected")
def on_disconnect(self):
print("Client just left")
def on_messages(self, data):
print(f"\nReceived data from client: \n {data}\n")
return data
socketio.on_namespace(MyCustomNamespace('/channel_A'))
if __name__ == "__main__":
socketio.run(app, host="192.168.0.28", port=2000, certfile="server.crt", keyfile="server.key", server_side=True, debug=True)
#socketio.run(app, host="192.168.0.28", port=2000, debug=True)
The code for client connection is simply:
import socketio
sio = socketio.Client()
def message_received(data):
print(f"Message {data} received")
@sio.on('connect', namespace="/channel_A")
def on_connect():
print("Connect...")
@sio.on('disconnect', namespace="/channel_A")
def on_disconnect():
print(f"Disconnected from server")
if __name__ == '__main__':
sio.connect('https://192.168.0.28:2000', namespaces="/channel_A")
emit_times = 0
is_emit = True
data = '{"data": "foobar"}'
while is_emit:
sio.emit("messages", data, namespace="/channel_A", callback=message_received)
emit_times += 1
if emit_times > 1:
is_emit = False
sio.disconnect()
I am using python-socketio (https://python-socketio.readthedocs.io/en/latest/client.html#disconnecting-from-the-server) for client end.
When the server gets started, the website works well and the connection is secure. The command line looks like this:
* Restarting with stat
* Debugger is active!
* Debugger PIN: 142-782-563
(3484) wsgi starting up on https://192.168.0.28:2000
When SocketIO client tries to connect with the server, the connection is refused and on the server end, the error is finally thrown like this:
ssl.SSLError: [SSL: TLSV1_ALERT_UNKNOWN_CA] tlsv1 alert unknown ca (_ssl.c:2488)
I think I probably miss something. Any ideas? Thanks in advance!
