chore: migrate from gorilla/websocket to gobwas/ws

component/tls/utls.go

@@ -99,10 +99,9 @@ func copyConfig(c *tls.Config) *utls.Config {
 	}
 }
 
-// WebsocketHandshake basically calls UConn.Handshake inside it but it will only send
+// BuildWebsocketHandshakeState it will only send http/1.1 in its ALPN.
-// http/1.1 in its ALPN.
 // Copy from https://github.com/XTLS/Xray-core/blob/main/transport/internet/tls/tls.go
-func (c *UConn) WebsocketHandshake() error {
+func (c *UConn) BuildWebsocketHandshakeState() error {
 	// Build the handshake state. This will apply every variable of the TLS of the
 	// fingerprint in the UConn
 	if err := c.BuildHandshakeState(); err != nil {
@@ -120,11 +119,11 @@ func (c *UConn) WebsocketHandshake() error {
 	if !hasALPNExtension { // Append extension if doesn't exists
 		c.Extensions = append(c.Extensions, &utls.ALPNExtension{AlpnProtocols: []string{"http/1.1"}})
 	}
-	// Rebuild the client hello and do the handshake
+	// Rebuild the client hello
 	if err := c.BuildHandshakeState(); err != nil {
 		return err
 	}
-	return c.Handshake()
+	return nil
 }
 
 func SetGlobalUtlsClient(Client string) {

go.mod

@@ -11,8 +11,8 @@ require (
 	github.com/go-chi/chi/v5 v5.0.10
 	github.com/go-chi/cors v1.2.1
 	github.com/go-chi/render v1.0.3
+	github.com/gobwas/ws v1.3.0
 	github.com/gofrs/uuid/v5 v5.0.0
-	github.com/gorilla/websocket v1.5.0
 	github.com/insomniacslk/dhcp v0.0.0-20230908212754-65c27093e38a
 	github.com/jpillora/backoff v1.0.0
 	github.com/klauspost/cpuid/v2 v2.2.5
@@ -69,6 +69,8 @@ require (
 	github.com/gaukas/godicttls v0.0.4 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/gobwas/httphead v0.1.0 // indirect
+	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/google/btree v1.1.2 // indirect
 	github.com/google/go-cmp v0.5.9 // indirect
 	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect

go.sum

@@ -49,6 +49,12 @@ github.com/go-ole/go-ole v1.3.0 h1:Dt6ye7+vXGIKZ7Xtk4s6/xVdGDQynvom7xCFEdWr6uE=
 github.com/go-ole/go-ole v1.3.0/go.mod h1:5LS6F96DhAwUc7C+1HLexzMXY1xGRSryjyPPKW6zv78=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
+github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
+github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
+github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
+github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
+github.com/gobwas/ws v1.3.0 h1:sbeU3Y4Qzlb+MOzIe6mQGf7QR4Hkv6ZD0qhGkBFL2O0=
+github.com/gobwas/ws v1.3.0/go.mod h1:hRKAFb8wOxFROYNsT1bqfWnhX+b5MFeJM9r2ZSwg/KY=
 github.com/gofrs/uuid/v5 v5.0.0 h1:p544++a97kEL+svbcFbCQVM9KFu0Yo25UoISXGNNH9M=
 github.com/gofrs/uuid/v5 v5.0.0/go.mod h1:CDOjlDMVAtN56jqyRUZh58JT31Tiw7/oQyEXZV+9bD8=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -63,8 +69,6 @@ github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
 github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 h1:yAJXTCF9TqKcTiHJAE8dj7HMvPfh66eeA2JYW7eFpSE=
 github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/tink/go v1.6.1 h1:t7JHqO8Ath2w2ig5vjwQYJzhGEZymedQc90lQXUBa4I=
-github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
-github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/hashicorp/yamux v0.1.1 h1:yrQxtgseBDrq9Y652vSRDvsKCJKOUD+GzTS4Y0Y8pvE=
 github.com/hashicorp/yamux v0.1.1/go.mod h1:CtWFDAQgb7dxtzFs4tWbplKIe2jSi3+5vKbgIO0SLnQ=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
@@ -237,6 +241,7 @@ golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=

hub/route/connections.go

@@ -11,7 +11,8 @@ import (
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
-	"github.com/gorilla/websocket"
+	"github.com/gobwas/ws"
+	"github.com/gobwas/ws/wsutil"
 )
 
 func connectionRouter() http.Handler {
@@ -23,13 +24,13 @@ func connectionRouter() http.Handler {
 }
 
 func getConnections(w http.ResponseWriter, r *http.Request) {
-	if !websocket.IsWebSocketUpgrade(r) {
+	if !(r.Header.Get("Upgrade") == "websocket") {
 		snapshot := statistic.DefaultManager.Snapshot()
 		render.JSON(w, r, snapshot)
 		return
 	}
 
-	conn, err := upgrader.Upgrade(w, r, nil)
+	conn, _, _, err := ws.UpgradeHTTP(r, w)
 	if err != nil {
 		return
 	}
@@ -55,7 +56,7 @@ func getConnections(w http.ResponseWriter, r *http.Request) {
 			return err
 		}
 
-		return conn.WriteMessage(websocket.TextMessage, buf.Bytes())
+		return wsutil.WriteMessage(conn, ws.StateServerSide, ws.OpText, buf.Bytes())
 	}
 
 	if err := sendSnapshot(); err != nil {

hub/route/server.go

@@ -5,6 +5,7 @@ import (
 	"crypto/subtle"
 	"crypto/tls"
 	"encoding/json"
+	"net"
 	"net/http"
 	"runtime/debug"
 	"strings"
@@ -21,7 +22,8 @@ import (
 	"github.com/go-chi/chi/v5/middleware"
 	"github.com/go-chi/cors"
 	"github.com/go-chi/render"
-	"github.com/gorilla/websocket"
+	"github.com/gobwas/ws"
+	"github.com/gobwas/ws/wsutil"
 )
 
 var (
@@ -29,12 +31,6 @@ var (
 	serverAddr   = ""
 
 	uiPath = ""
-
-	upgrader = websocket.Upgrader{
-		CheckOrigin: func(r *http.Request) bool {
-			return true
-		},
-	}
 )
 
 type Traffic struct {
@@ -166,7 +162,7 @@ func authentication(next http.Handler) http.Handler {
 		}
 
 		// Browser websocket not support custom header
-		if websocket.IsWebSocketUpgrade(r) && r.URL.Query().Get("token") != "" {
+		if r.Header.Get("Upgrade") == "websocket" && r.URL.Query().Get("token") != "" {
 			token := r.URL.Query().Get("token")
 			if !safeEuqal(token, serverSecret) {
 				render.Status(r, http.StatusUnauthorized)
@@ -197,10 +193,10 @@ func hello(w http.ResponseWriter, r *http.Request) {
 }
 
 func traffic(w http.ResponseWriter, r *http.Request) {
-	var wsConn *websocket.Conn
+	var wsConn net.Conn
-	if websocket.IsWebSocketUpgrade(r) {
+	if r.Header.Get("Upgrade") == "websocket" {
 		var err error
-		wsConn, err = upgrader.Upgrade(w, r, nil)
+		wsConn, _, _, err = ws.UpgradeHTTP(r, w)
 		if err != nil {
 			return
 		}
@@ -230,7 +226,7 @@ func traffic(w http.ResponseWriter, r *http.Request) {
 			_, err = w.Write(buf.Bytes())
 			w.(http.Flusher).Flush()
 		} else {
-			err = wsConn.WriteMessage(websocket.TextMessage, buf.Bytes())
+			err = wsutil.WriteMessage(wsConn, ws.StateServerSide, ws.OpText, buf.Bytes())
 		}
 
 		if err != nil {
@@ -240,10 +236,10 @@ func traffic(w http.ResponseWriter, r *http.Request) {
 }
 
 func memory(w http.ResponseWriter, r *http.Request) {
-	var wsConn *websocket.Conn
+	var wsConn net.Conn
-	if websocket.IsWebSocketUpgrade(r) {
+	if r.Header.Get("Upgrade") == "websocket" {
 		var err error
-		wsConn, err = upgrader.Upgrade(w, r, nil)
+		wsConn, _, _, err = ws.UpgradeHTTP(r, w)
 		if err != nil {
 			return
 		}
@@ -280,7 +276,7 @@ func memory(w http.ResponseWriter, r *http.Request) {
 			_, err = w.Write(buf.Bytes())
 			w.(http.Flusher).Flush()
 		} else {
-			err = wsConn.WriteMessage(websocket.TextMessage, buf.Bytes())
+			err = wsutil.WriteMessage(wsConn, ws.StateServerSide, ws.OpText, buf.Bytes())
 		}
 
 		if err != nil {
@@ -323,10 +319,10 @@ func getLogs(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	var wsConn *websocket.Conn
+	var wsConn net.Conn
-	if websocket.IsWebSocketUpgrade(r) {
+	if r.Header.Get("Upgrade") == "websocket" {
 		var err error
-		wsConn, err = upgrader.Upgrade(w, r, nil)
+		wsConn, _, _, err = ws.UpgradeHTTP(r, w)
 		if err != nil {
 			return
 		}
@@ -385,7 +381,7 @@ func getLogs(w http.ResponseWriter, r *http.Request) {
 			_, err = w.Write(buf.Bytes())
 			w.(http.Flusher).Flush()
 		} else {
-			err = wsConn.WriteMessage(websocket.TextMessage, buf.Bytes())
+			err = wsutil.WriteMessage(wsConn, ws.StateServerSide, ws.OpText, buf.Bytes())
 		}
 
 		if err != nil {

transport/vmess/websocket.go

@@ -1,6 +1,7 @@
 package vmess
 
 import (
+	"bufio"
 	"bytes"
 	"context"
 	"crypto/tls"
@@ -14,27 +15,24 @@ import (
 	"net/url"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/Dreamacro/clash/common/buf"
 	N "github.com/Dreamacro/clash/common/net"
 	tlsC "github.com/Dreamacro/clash/component/tls"
 
-	"github.com/gorilla/websocket"
+	"github.com/gobwas/ws"
+	"github.com/gobwas/ws/wsutil"
 	"github.com/zhangyunhao116/fastrand"
 )
 
 type websocketConn struct {
-	conn       *websocket.Conn
+	net.Conn
-	reader     io.Reader
+	state          ws.State
-	remoteAddr net.Addr
+	reader         *wsutil.Reader
+	controlHandler wsutil.FrameHandlerFunc
 
 	rawWriter N.ExtendedWriter
-
-	// https://godoc.org/github.com/gorilla/websocket#hdr-Concurrency
-	rMux sync.Mutex
-	wMux sync.Mutex
 }
 
 type websocketWithEarlyDataConn struct {
@@ -61,32 +59,48 @@ type WebsocketConfig struct {
 }
 
 // Read implements net.Conn.Read()
-func (wsc *websocketConn) Read(b []byte) (int, error) {
+// modify from gobwas/ws/wsutil.readData
-	wsc.rMux.Lock()
+func (wsc *websocketConn) Read(b []byte) (n int, err error) {
-	defer wsc.rMux.Unlock()
+	var header ws.Header
 	for {
-		reader, err := wsc.getReader()
+		n, err = wsc.reader.Read(b)
-		if err != nil {
+		// in gobwas/ws: "The error is io.EOF only if all of message bytes were read."
-			return 0, err
+		// but maybe next frame still have data, so drop it
+		if errors.Is(err, io.EOF) {
+			err = nil
+		}
+		if !errors.Is(err, wsutil.ErrNoFrameAdvance) {
+			return
+		}
+		header, err = wsc.reader.NextFrame()
+		if err != nil {
+			return
+		}
+		if header.OpCode.IsControl() {
+			err = wsc.controlHandler(header, wsc.reader)
+			if err != nil {
+				return
+			}
+			continue
+		}
+		if header.OpCode&(ws.OpBinary|ws.OpText) == 0 {
+			err = wsc.reader.Discard()
+			if err != nil {
+				return
 			}
-
-		nBytes, err := reader.Read(b)
-		if err == io.EOF {
-			wsc.reader = nil
 			continue
 		}
-		return nBytes, err
 	}
 }
 
 // Write implements io.Writer.
-func (wsc *websocketConn) Write(b []byte) (int, error) {
+func (wsc *websocketConn) Write(b []byte) (n int, err error) {
-	wsc.wMux.Lock()
+	err = wsutil.WriteMessage(wsc.Conn, wsc.state, ws.OpBinary, b)
-	defer wsc.wMux.Unlock()
+	if err != nil {
-	if err := wsc.conn.WriteMessage(websocket.BinaryMessage, b); err != nil {
+		return
-		return 0, err
 	}
-	return len(b), nil
+	n = len(b)
+	return
 }
 
 func (wsc *websocketConn) WriteBuffer(buffer *buf.Buffer) error {
@@ -108,7 +122,7 @@ func (wsc *websocketConn) WriteBuffer(buffer *buf.Buffer) error {
 
 	header := buffer.ExtendHeader(headerLen)
 	_ = header[2] // bounds check hint to compiler
-	header[0] = websocket.BinaryMessage | 1<<7
+	header[0] = byte(ws.OpBinary) | 0x80
 	header[1] = 1 << 7
 
 	if dataLen < 126 {
@@ -121,12 +135,12 @@ func (wsc *websocketConn) WriteBuffer(buffer *buf.Buffer) error {
 		binary.BigEndian.PutUint64(header[2:], uint64(dataLen))
 	}
 
+	if wsc.state.ClientSide() {
 		maskKey := fastrand.Uint32()
 		binary.LittleEndian.PutUint32(header[1+payloadBitLength:], maskKey)
 		N.MaskWebSocket(maskKey, data)
+	}
 
-	wsc.wMux.Lock()
-	defer wsc.wMux.Unlock()
 	return wsc.rawWriter.WriteBuffer(buffer)
 }
 
@@ -135,59 +149,16 @@ func (wsc *websocketConn) FrontHeadroom() int {
 }
 
 func (wsc *websocketConn) Upstream() any {
-	return wsc.conn.UnderlyingConn()
+	return wsc.Conn
 }
 
 func (wsc *websocketConn) Close() error {
-	var e []string
+	_ = wsc.Conn.SetWriteDeadline(time.Now().Add(time.Second * 5))
-	if err := wsc.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second*5)); err != nil {
+	_ = wsutil.WriteMessage(wsc.Conn, wsc.state, ws.OpClose, ws.NewCloseFrameBody(ws.StatusNormalClosure, ""))
-		e = append(e, err.Error())
+	_ = wsc.Conn.Close()
-	}
-	if err := wsc.conn.Close(); err != nil {
-		e = append(e, err.Error())
-	}
-	if len(e) > 0 {
-		return fmt.Errorf("failed to close connection: %s", strings.Join(e, ","))
-	}
 	return nil
 }
 
-func (wsc *websocketConn) getReader() (io.Reader, error) {
-	if wsc.reader != nil {
-		return wsc.reader, nil
-	}
-
-	_, reader, err := wsc.conn.NextReader()
-	if err != nil {
-		return nil, err
-	}
-	wsc.reader = reader
-	return reader, nil
-}
-
-func (wsc *websocketConn) LocalAddr() net.Addr {
-	return wsc.conn.LocalAddr()
-}
-
-func (wsc *websocketConn) RemoteAddr() net.Addr {
-	return wsc.remoteAddr
-}
-
-func (wsc *websocketConn) SetDeadline(t time.Time) error {
-	if err := wsc.SetReadDeadline(t); err != nil {
-		return err
-	}
-	return wsc.SetWriteDeadline(t)
-}
-
-func (wsc *websocketConn) SetReadDeadline(t time.Time) error {
-	return wsc.conn.SetReadDeadline(t)
-}
-
-func (wsc *websocketConn) SetWriteDeadline(t time.Time) error {
-	return wsc.conn.SetWriteDeadline(t)
-}
-
 func (wsedc *websocketWithEarlyDataConn) Dial(earlyData []byte) error {
 	base64DataBuf := &bytes.Buffer{}
 	base64EarlyDataEncoder := base64.NewEncoder(base64.RawURLEncoding, base64DataBuf)
@@ -341,29 +312,25 @@ func streamWebsocketWithEarlyDataConn(conn net.Conn, c *WebsocketConfig) (net.Co
 }
 
 func streamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig, earlyData *bytes.Buffer) (net.Conn, error) {
-
+	dialer := ws.Dialer{
-	dialer := &websocket.Dialer{
+		NetDial: func(ctx context.Context, network, addr string) (net.Conn, error) {
-		NetDial: func(network, addr string) (net.Conn, error) {
 			return conn, nil
 		},
-		ReadBufferSize:   4 * 1024,
+		TLSConfig: c.TLSConfig,
-		WriteBufferSize:  4 * 1024,
-		HandshakeTimeout: time.Second * 8,
 	}
-
 	scheme := "ws"
 	if c.TLS {
 		scheme = "wss"
-		dialer.TLSClientConfig = c.TLSConfig
 		if len(c.ClientFingerprint) != 0 {
 			if fingerprint, exists := tlsC.GetFingerprint(c.ClientFingerprint); exists {
-				dialer.NetDialTLSContext = func(_ context.Context, _, addr string) (net.Conn, error) {
 				utlsConn := tlsC.UClient(conn, c.TLSConfig, fingerprint)
 
-					if err := utlsConn.(*tlsC.UConn).WebsocketHandshake(); err != nil {
+				if err := utlsConn.(*tlsC.UConn).BuildWebsocketHandshakeState(); err != nil {
 					return nil, fmt.Errorf("parse url %s error: %w", c.Path, err)
 				}
-					return utlsConn, nil
+
+				dialer.TLSClient = func(conn net.Conn, hostname string) net.Conn {
+					return utlsConn
 				}
 			}
 		}
@@ -381,38 +348,47 @@ func streamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig,
 		RawQuery: u.RawQuery,
 	}
 
-	headers := http.Header{}
+	headers := http.Header{"User-Agent": []string{"Go-http-client/1.1"}} // match golang's net/http
 	if c.Headers != nil {
-		for k := range c.Headers {
+		cHeaders := c.Headers
-			headers.Add(k, c.Headers.Get(k))
+		// gobwas/ws send "Host" directly in Upgrade() by `httpWriteHeader(bw, headerHost, u.Host)`
+		// if headers has "Host" will send repeatedly
+		if host := cHeaders.Get("Host"); host != "" {
+			cHeaders.Del("Host")
+			uri.Host = host
+		}
+		for k := range cHeaders {
+			headers.Add(k, cHeaders.Get(k))
 		}
 	}
 
 	if earlyData != nil {
+		earlyDataString := earlyData.String()
 		if c.EarlyDataHeaderName == "" {
-			uri.Path += earlyData.String()
+			uri.Path += earlyDataString
 		} else {
-			headers.Set(c.EarlyDataHeaderName, earlyData.String())
+			// gobwas/ws will check server's response "Sec-Websocket-Protocol" so must add Protocols to ws.Dialer
+			// if not will cause ws.ErrHandshakeBadSubProtocol
+			if c.EarlyDataHeaderName == "Sec-WebSocket-Protocol" {
+				// gobwas/ws will set "Sec-Websocket-Protocol" according dialer.Protocols
+				// to avoid send repeatedly don't set it to headers
+				dialer.Protocols = []string{earlyDataString}
+			} else {
+				headers.Set(c.EarlyDataHeaderName, earlyDataString)
+			}
+
 		}
 	}
 
-	wsConn, resp, err := dialer.DialContext(ctx, uri.String(), headers)
+	dialer.Header = ws.HandshakeHeaderHTTP(headers)
+
+	conn, reader, _, err := dialer.Dial(ctx, uri.String())
 	if err != nil {
-		reason := err
+		return nil, fmt.Errorf("dial %s error: %w", uri.Host, err)
-		if resp != nil {
-			reason = errors.New(resp.Status)
-		}
-		return nil, fmt.Errorf("dial %s error: %w", uri.Host, reason)
 	}
 
-	conn = &websocketConn{
+	conn = newWebsocketConn(conn, reader, ws.StateClientSide)
-		conn:       wsConn,
-		rawWriter:  N.NewExtendedWriter(wsConn.UnderlyingConn()),
-		remoteAddr: conn.RemoteAddr(),
-	}
 	// websocketConn can't correct handle ReadDeadline
-	// gorilla/websocket will cache the os.ErrDeadlineExceeded from conn.Read()
-	// it will cause read fail and event panic in *websocket.Conn.NextReader()
 	// so call N.NewDeadlineConn to add a safe wrapper
 	return N.NewDeadlineConn(conn), nil
 }
@@ -436,3 +412,68 @@ func StreamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig)
 
 	return streamWebsocketConn(ctx, conn, c, nil)
 }
+
+func newWebsocketConn(conn net.Conn, br *bufio.Reader, state ws.State) *websocketConn {
+	controlHandler := wsutil.ControlFrameHandler(conn, state)
+	var reader io.Reader
+	if br != nil && br.Buffered() > 0 {
+		reader = br
+	} else {
+		reader = conn
+	}
+	return &websocketConn{
+		Conn:  conn,
+		state: state,
+		reader: &wsutil.Reader{
+			Source:          reader,
+			State:           state,
+			SkipHeaderCheck: true,
+			CheckUTF8:       false,
+			OnIntermediate:  controlHandler,
+		},
+		controlHandler: controlHandler,
+		rawWriter:      N.NewExtendedWriter(conn),
+	}
+}
+
+var replacer = strings.NewReplacer("+", "-", "/", "_", "=", "")
+
+func decodeEd(s string) ([]byte, error) {
+	return base64.RawURLEncoding.DecodeString(replacer.Replace(s))
+}
+
+func decodeXray0rtt(requestHeader http.Header) ([]byte, http.Header) {
+	var edBuf []byte
+	responseHeader := http.Header{}
+	// read inHeader's `Sec-WebSocket-Protocol` for Xray's 0rtt ws
+	if secProtocol := requestHeader.Get("Sec-WebSocket-Protocol"); len(secProtocol) > 0 {
+		if buf, err := decodeEd(secProtocol); err == nil { // sure could base64 decode
+			edBuf = buf
+		}
+	}
+	return edBuf, responseHeader
+}
+
+func StreamUpgradedWebsocketConn(w http.ResponseWriter, r *http.Request) (net.Conn, error) {
+	edBuf, responseHeader := decodeXray0rtt(r.Header)
+	wsConn, rw, _, err := ws.HTTPUpgrader{
+		Header: responseHeader,
+	}.Upgrade(r, w)
+	if err != nil {
+		return nil, err
+	}
+	conn := newWebsocketConn(wsConn, rw.Reader, ws.StateServerSide)
+	if len(edBuf) > 0 {
+		return &websocketWithReaderConn{conn, io.MultiReader(bytes.NewReader(edBuf), conn)}, nil
+	}
+	return conn, nil
+}
+
+type websocketWithReaderConn struct {
+	*websocketConn
+	reader io.Reader
+}
+
+func (ws *websocketWithReaderConn) Read(b []byte) (n int, err error) {
+	return ws.reader.Read(b)
+}