You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: hub.go
    path of file: ./repos/v2ray-core/transport/internet/websocket
    
    the code of the file until where you have to start completion: // +build !confonly

package websocket

import (
	"context"
	"crypto/tls"
	"net/http"
	"sync"
	"time"

	"github.com/gorilla/websocket"
	"github.com/pires/go-proxyproto"

	"v2ray.com/core/common"
	"v2ray.com/core/common/net"
	http_proto "v2ray.com/core/common/protocol/http"
	"v2ray.com/core/common/session"
	"v2ray.com/core/transport/internet"
	v2tls "v2ray.com/core/transport/internet/tls"
)

type requestHandler struct {
	path string
	ln   *Listener
}

var upgrader = &websocket.Upgrader{
	ReadBufferSize:   4 * 1024,
	WriteBufferSize:  4 * 1024,
	HandshakeTimeout: time.Second * 4,
	CheckOrigin: func(r *http.Request) bool {
		return true
	},
}

func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
	if request.URL.Path != h.path {
		writer.WriteHeader(http.StatusNotFound)
		return
	}
	conn, err := upgrader.Upgrade(writer, request, nil)
	if err != nil {
		newError("failed to convert to WebSocket connection").Base(err).WriteToLog()
		return
	}

	forwardedAddrs := http_proto.ParseXForwardedFor(request.Header)
	remoteAddr := conn.RemoteAddr()
	if len(forwardedAddrs) > 0 && forwardedAddrs[0].Family().IsIP() {
		remoteAddr.(*net.
    
func ListenWS(ctx context.Context, address net.Address, port net.Port, streamSettings *internet.MemoryStreamConfig, addConn internet.ConnHandler) (internet.Listener, error) {
	listener, err := internet.ListenSystem(ctx, &net.TCPAddr{
		IP:   address.IP(),
		Port: int(port),
	}, streamSettings.SocketSettings)
	if err != nil {
		return nil, newError("failed to listen TCP(for WS) on", address, ":", port).Base(err)
	}
	newError("listening TCP(for WS) on ", address, ":", port).WriteToLog(session.ExportIDToError(ctx))

	wsSettings := streamSettings.ProtocolSettings.(*Config)

	if wsSettings.AcceptProxyProtocol {
		policyFunc := func(upstream net.Addr) (proxyproto.Policy, error) { return proxyproto.REQUIRE, nil }
		listener = &proxyproto.Listener{Listener: listener, Policy: policyFunc}
		newError("accepting PROXY protocol").AtWarning().WriteToLog(session.ExportIDToError(ctx))
	}

	if config := v2tls.ConfigFromStreamSettings(streamSettings); config != nil {
		if tlsConfig := config.GetTLSConfig(); tlsConfig != nil {
			listener = tls.NewListener(listener, tlsConfig)
		}
	}

	l := &Listener{
		config:   wsSettings,
		addConn:  addConn,
		listener: listener,
	}

	l.server = http.Server{
		Handler: &requestHandler{
			path: wsSettings.GetNormalizedPath(),
			ln:   l,
		},
		ReadHeaderTimeout: time.Second * 4,
		MaxHeaderBytes:    2048,
	}

	go func() {
		if err := l.server.Serve(l.listener); err != nil {
			newError("failed to serve http for WebSocket").Base(err).AtWarning().WriteToLog(session.ExportIDToError(ctx))
		}
	}()

	return l, err
}