SignalR: Error during WebSocket handshake: Unexpected response code: 400

Question

I have just started working with SignalR. I have implemented real-time data reflection on my site using signalr. I was getting \"Error during Web-Socket handshake: Unexpecte

Answer 1

If you're behind Nginx, add these three lines (the ones starting with proxy_):

server {       
    listen       443; # Or 80 or whatever
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    ...
}

HTTPS/HTTP is not the issue. WSS will be automatically used on HTTPS pages, and WS used on HTTP, without any manual setting.