Error log on server side every time a WS is opened

When any new WebSocket connection is opened, on the server trace I see this error message about the non origin header..., but still it works as intended, the WS workflow happens as you can see with the WebSocket HANDSHAKING /ws-notifications/ [127.0.0.1:45222]:

$ python manage.py runserver
Performing system checks...

System check identified no issues (0 silenced).
April 06, 2018 - 15:10:23
Django version 2.0.4, using settings 'config.settings.local'
Starting ASGI/Channels development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
2018-04-06 15:10:23,742 - INFO - server - HTTP/2 support not enabled (install the http2 and tls Twisted extras)
2018-04-06 15:10:23,742 - INFO - server - Configuring endpoint tcp:port=8000:interface=127.0.0.1
2018-04-06 15:10:23,743 - INFO - server - Listening on TCP address 127.0.0.1:8000
non origin header: b'host'
non origin header: b'user-agent'
non origin header: b'accept'
non origin header: b'accept-language'
non origin header: b'accept-encoding'
non origin header: b'sec-websocket-version'
got origin header, val b'http://127.0.0.1:8000'
nuhost: '127.0.0.1'
non origin header: b'sec-websocket-protocol'
non origin header: b'sec-websocket-extensions'
non origin header: b'sec-websocket-key'
non origin header: b'cookie'
non origin header: b'connection'
non origin header: b'pragma'
non origin header: b'cache-control'
non origin header: b'upgrade'
origin header: 127.0.0.1
[2018/04/06 15:10:24] WebSocket HANDSHAKING /ws-notifications/ [127.0.0.1:45222]
[2018/04/06 15:10:24] WebSocket CONNECT /ws-notifications/ [127.0.0.1:45222]

I just used the consumer provided in the tutorial to see it working:

import json

from channels.generic.websocket import WebsocketConsumer


class NotificationsConsumer(WebsocketConsumer):
    """Consumer to manage WebSocket connections for the Notification app,
    called when the websocket is handshaking as part of initial connection.
    """
    def connect(self):
        if self.scope["user"].is_anonymous:
            # Reject the connection
            self.close()

        else:
            # Accept the connection
            self.accept()

    def disconnect(self, close_code):
        pass

    def receive(self, text_data):
        text_data_json = json.loads(text_data)
        message = text_data_json['message']
        self.send(text_data=json.dumps({
            'message': message
        }))

And this is the JS client, also a minimal one:

$(function () {
   // Correctly decide between ws:// and wss://
    var ws_scheme = window.location.protocol == "https:" ? "wss" : "ws";
    var ws_path = ws_scheme + '://' + window.location.host + "/ws-notifications/";
    var webSocket = new channels.WebSocketBridge();
    webSocket.connect(ws_path);


    // Helpful debugging
    webSocket.socket.onopen = function () {
        console.log("Connected to " + ws_path + " stream");
        webSocket.send({
            "message": "this is the message because you connected to " + ws_path,
        })
    };

    webSocket.socket.onclose = function () {
        console.error("Disconnected from " + ws_path + " stream");
    };

    webSocket.listen(function(event) {
        $("#notifications").addClass("btn-danger")
      });

});

I’m unable to find why this is happening.

[andrewgodwin]

They’ll be in the next release when I get to doing it, I am taking a few weeks off from most coding. The next one is big and so needs lots of prep in terms of release notes.

[andrewgodwin]

The string non origin header doesn’t appear in either the Channels or Daphne code base so it’s not coming from us. If you can find where the string is in the code of various libraries that will help work out where it’s coming from.