Example of Socket.io proxy config for NGINX (version 1.3.13+)

gistfile1.txt

upstream backend {
    server 127.0.0.1:3000;
}

server {
    listen 80;

    access_log /var/log/nginx/yoursite.access.log;
    error_log /var/log/nginx/yoursite.error.log;

    server_name api.yoursite.com

    # prevents 502 bad gateway error
    large_client_header_buffers 8 32k;

    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        # prevents 502 bad gateway error
        proxy_buffers 8 32k;
        proxy_buffer_size 64k;

        proxy_pass http://backend;
        proxy_redirect off;

        # enables WS support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
    }
}

Doesnt work for me.
I got more errors than before :O

404 not found.

Fixed in https://gist.github.com/Bubelbub/0a942a0d51a3d329897d
Line 32.

Thank you, this solved a totally different issue for me.

Excellent gist, thanks. Was having trouble until I added the "proxy_redirect off;" (client was complaining of "unknown code 301").