HAProxy to Nginx (Web + V2Ray WebSocket) + OpenConnect + SSH + ShadowsocksR (TLS OBFS)

haproxy.cfg

defaults
    timeout connect 5s
    timeout client 24h
    timeout server 24h

global
    log /dev/log local0

frontend ssl
    log global
    mode tcp
    option tcplog
    option dontlognull
    bind 0.0.0.0:443

    tcp-request inspect-delay 3s
    tcp-request content accept if { req.ssl_hello_type 1 }

    acl tls req.ssl_hello_type 1
    acl has_sni req.ssl_sni -m found
    acl ssh_payload payload(0,7) -m bin 5353482d322e30

    use_backend ocserv if tls !has_sni
    use_backend shadowsocksr if tls { req.ssl_sni -i your.tls.obfuscation.domain }
    use_backend nginx if tls has_sni
    use_backend openssh if ssh_payload
    use_backend openssh if !tls { req.len 0 }
    default_backend nginx

backend openssh
    mode tcp
    timeout server 3h
    server openssh your.host.internal.ip:22

backend ocserv
    mode tcp
    server sslvpn ocserv:443 send-proxy-v2

backend nginx
    mode tcp
    timeout server 5m
    server webserver nginx:443 send-proxy

backend shadowsocksr
    mode tcp
    server socks ssr:443

你好，我按照你的配置haproxy反代nginx，nginx再反代v2ray，网站和可以正常访问，v2ray可以正常接收到客户端的请求数据，但是服务器会错：[Warning] Transport|Internet|WebSocket: failed to serve http for WebSocket > accept tcp 本地ip:端口: use of closed network connection，请问是不是nginx还需要配置什么？