I tried using ws instead of http but the issue persists. This worked for me with Nginx, Node server and Angular 4 Edit your nginx web server config file as: server { Reply to this email directly, view it on GitHub It seems that even though the Websocket connection establishes correctly (indicated by the 101 Switching Protocols request), it still defaults to long-polling. In Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Thanks for this, I was able to connectand retrieve the list of apps. failed: Error during WebSocket handshake: Unexpected response code: 404 EC2 (Tomcat)+ALB Hope it helps. A response code 200 means that something in the chain, be it webfaction routing or a webserver you're running, doesn't support websockets. hello may i update this ? ai-tools-online.xyz is your domain, http://127.0.0.1:5000 is your socket server. Reply to this email directly, view it on GitHub Don't know why. You can use daphne server to manage http/ws or only ws connections. extend your origins by adding other patterns like. ***> wrote: I'm using Nginx and only one server for node, so it seems to be not a load balancing problem. Not the answer you're looking for? WebWebSocket connection to '' failed: Error during WebSocket handshake: Unexpected response code: 405. For other cases (supposedly most users), this is most likely a reverse proxy/server configuration problem. I was looking at your previous comments when you asked about these steps: - I run the command "daphne -p {port_number} {route:to:asgi:module:channel_ I just get this error in developer tools saying: WebSocket connection to 'wss:///socket.io/?EIO=3&transport=websocket&sid=2b_v_BXtbwzl5z2yAAAI' failed: Error during WebSocket handshake: Unexpected response code: 400. Once you have created the app take note of assigned port number to the app. Hi, You signed in with another tab or window. 2019-03-18 12:25:48.199:DBUG:oejs.session:qtp428746855-62: Session node019pwf1vjcvfue1v8aof9xmc56r0 accessed, stopping timer, active requests=3 In both cases you will need a webfaction application of type "Custom websockets app (listening on port)" created. This guide line for apache2 only no relavence with nginx, this answer for apache2+etherpad lovers. In future, you can ask requests like this on the django-users mailing list. Error during WebSocket handshake: Unexpected response code: 400, http://stackoverflow.com/questions/28025073/error-during-websocket-handshake-unexpected-response-code-400-with-nginx-proxy, https://chrislea.com/2013/02/23/proxying-websockets-with-nginx/, http://blog.flux7.com/web-apps-websockets-with-aws-elastic-load-balancing, figure out how to enable web sockets on ec2, http://stackoverflow.com/a/27534443/2044993, WebSocket connection to 'ws://file.pizza/socket.io/?EIO=3&transport=websocket&sid=