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chore: migrate from gorilla/websocket to gobwas/ws

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This commit is contained in:
wwqgtxx 2023-10-06 17:44:36 +08:00
parent d1e88a30cb
commit 5ff4473083
6 changed files with 187 additions and 143 deletions
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9
component/tls/utls.go
View file

@ -99,10 +99,9 @@ func copyConfig(c *tls.Config) *utls.Config {
}
}
// WebsocketHandshake basically calls UConn.Handshake inside it but it will only send
// http/1.1 in its ALPN.
// BuildWebsocketHandshakeState it will only send 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) {

4
go.mod
View file

@ -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

9
go.sum
View file

@ -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=

9
hub/route/connections.go
View file

@ -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 {

36
hub/route/server.go
View file

@ -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
if websocket.IsWebSocketUpgrade(r) {
var wsConn net.Conn
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
if websocket.IsWebSocketUpgrade(r) {
var wsConn net.Conn
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
if websocket.IsWebSocketUpgrade(r) {
var wsConn net.Conn
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 {

263
transport/vmess/websocket.go
View file

@ -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
reader io.Reader
remoteAddr net.Addr
net.Conn
state ws.State
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) {
wsc.rMux.Lock()
defer wsc.rMux.Unlock()
// modify from gobwas/ws/wsutil.readData
func (wsc *websocketConn) Read(b []byte) (n int, err error) {
var header ws.Header
for {
reader, err := wsc.getReader()
if err != nil {
return 0, err
n, err = wsc.reader.Read(b)
// in gobwas/ws: "The error is io.EOF only if all of message bytes were read."
// but maybe next frame still have data, so drop it
if errors.Is(err, io.EOF) {
err = nil
}
nBytes, err := reader.Read(b)
if err == io.EOF {
wsc.reader = 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
}
continue
}
return nBytes, err
}
}
// Write implements io.Writer.
func (wsc *websocketConn) Write(b []byte) (int, error) {
wsc.wMux.Lock()
defer wsc.wMux.Unlock()
if err := wsc.conn.WriteMessage(websocket.BinaryMessage, b); err != nil {
return 0, err
func (wsc *websocketConn) Write(b []byte) (n int, err error) {
err = wsutil.WriteMessage(wsc.Conn, wsc.state, ws.OpBinary, b)
if err != nil {
return
}
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))
}
maskKey := fastrand.Uint32()
binary.LittleEndian.PutUint32(header[1+payloadBitLength:], maskKey)
N.MaskWebSocket(maskKey, data)
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
if err := wsc.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second*5)); err != nil {
e = append(e, err.Error())
}
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, ","))
}
_ = wsc.Conn.SetWriteDeadline(time.Now().Add(time.Second * 5))
_ = wsutil.WriteMessage(wsc.Conn, wsc.state, ws.OpClose, ws.NewCloseFrameBody(ws.StatusNormalClosure, ""))
_ = wsc.Conn.Close()
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 := &websocket.Dialer{
NetDial: func(network, addr string) (net.Conn, error) {
dialer := ws.Dialer{
NetDial: func(ctx context.Context, network, addr string) (net.Conn, error) {
return conn, nil
},
ReadBufferSize: 4 * 1024,
WriteBufferSize: 4 * 1024,
HandshakeTimeout: time.Second * 8,
TLSConfig: c.TLSConfig,
}
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)
utlsConn := tlsC.UClient(conn, c.TLSConfig, fingerprint)
if err := utlsConn.(*tlsC.UConn).WebsocketHandshake(); err != nil {
return nil, fmt.Errorf("parse url %s error: %w", c.Path, err)
}
return utlsConn, nil
if err := utlsConn.(*tlsC.UConn).BuildWebsocketHandshakeState(); err != nil {
return nil, fmt.Errorf("parse url %s error: %w", c.Path, err)
}
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 {
headers.Add(k, c.Headers.Get(k))
cHeaders := c.Headers
// 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
if resp != nil {
reason = errors.New(resp.Status)
}
return nil, fmt.Errorf("dial %s error: %w", uri.Host, reason)
return nil, fmt.Errorf("dial %s error: %w", uri.Host, err)
}
conn = &websocketConn{
conn: wsConn,
rawWriter: N.NewExtendedWriter(wsConn.UnderlyingConn()),
remoteAddr: conn.RemoteAddr(),
}
conn = newWebsocketConn(conn, reader, ws.StateClientSide)
// 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)
}