haproxy config to work with miksago's node-websocket-server

haproxy_nodejs_websocket

global
    maxconn 4096
    user haproxy
    group haproxy
    debug

defaults
    timeout client 60000
    timeout server 30000
    timeout connect 4000

frontend http_in
    mode http
    bind *:80

    option http-server-close

    acl is_websocket hdr(Upgrade)  -i WebSocket #check the Upgrade header
    acl is_websocket hdr_beg(Host) -i ws        #also check the host
    use_backend node_ws if is_websocket

    default_backend nginx_static

backend node_ws
    mode http
    option http-pretend-keepalive
    server node_ws_1 127.0.0.1:8585 check

backend nginx_static
    mode http
    server nginx_static_1 127.0.0.1:8000 check