feat: add v2ray-http-upgrade support

adapter/outbound/shadowsocks.go

@@ -66,6 +66,7 @@ type v2rayObfsOption struct {
 	Headers          map[string]string `obfs:"headers,omitempty"`
 	SkipCertVerify   bool              `obfs:"skip-cert-verify,omitempty"`
 	Mux              bool              `obfs:"mux,omitempty"`
+	V2rayHttpUpgrade bool              `obfs:"v2ray-http-upgrade,omitempty"`
 }
 
 type shadowTLSOption struct {
@@ -263,6 +264,7 @@ func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
 			Path:             opts.Path,
 			Headers:          opts.Headers,
 			Mux:              opts.Mux,
+			V2rayHttpUpgrade: opts.V2rayHttpUpgrade,
 		}
 
 		if opts.TLS {

adapter/outbound/trojan.go

@@ -56,6 +56,7 @@ func (t *Trojan) plainStream(ctx context.Context, c net.Conn) (net.Conn, error)
 			Host:             host,
 			Port:             port,
 			Path:             t.option.WSOpts.Path,
+			V2rayHttpUpgrade: t.option.WSOpts.V2rayHttpUpgrade,
 		}
 
 		if t.option.SNI != "" {

adapter/outbound/vless.go

@@ -93,6 +93,7 @@ func (v *Vless) StreamConnContext(ctx context.Context, c net.Conn, metadata *C.M
 			Path:                v.option.WSOpts.Path,
 			MaxEarlyData:        v.option.WSOpts.MaxEarlyData,
 			EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
+			V2rayHttpUpgrade:    v.option.WSOpts.V2rayHttpUpgrade,
 			ClientFingerprint:   v.option.ClientFingerprint,
 			Headers:             http.Header{},
 		}

adapter/outbound/vmess.go

@@ -91,6 +91,7 @@ type WSOptions struct {
 	Headers             map[string]string `proxy:"headers,omitempty"`
 	MaxEarlyData        int               `proxy:"max-early-data,omitempty"`
 	EarlyDataHeaderName string            `proxy:"early-data-header-name,omitempty"`
+	V2rayHttpUpgrade    bool              `proxy:"v2ray-http-upgrade,omitempty"`
 }
 
 // StreamConnContext implements C.ProxyAdapter
@@ -110,6 +111,7 @@ func (v *Vmess) StreamConnContext(ctx context.Context, c net.Conn, metadata *C.M
 			Path:                v.option.WSOpts.Path,
 			MaxEarlyData:        v.option.WSOpts.MaxEarlyData,
 			EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
+			V2rayHttpUpgrade:    v.option.WSOpts.V2rayHttpUpgrade,
 			ClientFingerprint:   v.option.ClientFingerprint,
 			Headers:             http.Header{},
 		}

docs/config.yaml

@@ -362,6 +362,7 @@ proxies: # socks5
       # mux: true
       # headers:
       #   custom: value
+      # v2ray-http-upgrade: false
 
   - name: "ss4-shadow-tls"
     type: ss
@@ -439,6 +440,7 @@ proxies: # socks5
       #   Host: v2ray.com
       # max-early-data: 2048
       # early-data-header-name: Sec-WebSocket-Protocol
+      # v2ray-http-upgrade: false
 
   - name: "vmess-h2"
     type: vmess
@@ -566,6 +568,7 @@ proxies: # socks5
       path: "/"
       headers:
         Host: example.com
+      # v2ray-http-upgrade: false
 
   # Trojan
   - name: "trojan"
@@ -609,6 +612,7 @@ proxies: # socks5
     #   path: /path
     #   headers:
     #     Host: example.com
+    #   v2ray-http-upgrade: false
 
   - name: "trojan-xtls"
     type: trojan

transport/trojan/trojan.go

@@ -59,6 +59,7 @@ type WebsocketOption struct {
 	Port             string
 	Path             string
 	Headers          http.Header
+	V2rayHttpUpgrade bool
 }
 
 type Trojan struct {
@@ -132,6 +133,7 @@ func (t *Trojan) StreamWebsocketConn(ctx context.Context, conn net.Conn, wsOptio
 		Port:              wsOptions.Port,
 		Path:              wsOptions.Path,
 		Headers:           wsOptions.Headers,
+		V2rayHttpUpgrade:  wsOptions.V2rayHttpUpgrade,
 		TLS:               true,
 		TLSConfig:         tlsConfig,
 		ClientFingerprint: t.option.ClientFingerprint,

transport/v2ray-plugin/websocket.go

@@ -20,6 +20,7 @@ type Option struct {
 	SkipCertVerify   bool
 	Fingerprint      string
 	Mux              bool
+	V2rayHttpUpgrade bool
 }
 
 // NewV2rayObfs return a HTTPObfs
@@ -33,6 +34,7 @@ func NewV2rayObfs(ctx context.Context, conn net.Conn, option *Option) (net.Conn,
 		Host:             option.Host,
 		Port:             option.Port,
 		Path:             option.Path,
+		V2rayHttpUpgrade: option.V2rayHttpUpgrade,
 		Headers:          header,
 	}
 

transport/vmess/websocket.go

@@ -55,6 +55,7 @@ type WebsocketConfig struct {
 	MaxEarlyData        int
 	EarlyDataHeaderName string
 	ClientFingerprint   string
+	V2rayHttpUpgrade    bool
 }
 
 // Read implements net.Conn.Read()
@@ -352,6 +353,39 @@ func streamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig,
 		RawQuery: u.RawQuery,
 	}
 
+	if c.V2rayHttpUpgrade {
+		if c.TLS {
+			if dialer.TLSClient != nil {
+				conn = dialer.TLSClient(conn, uri.Host)
+			} else {
+				conn = tls.Client(conn, dialer.TLSConfig)
+			}
+		}
+		request := &http.Request{
+			Method: http.MethodGet,
+			URL:    &uri,
+			Header: c.Headers.Clone(),
+			Host:   c.Host,
+		}
+		request.Header.Set("Connection", "Upgrade")
+		request.Header.Set("Upgrade", "websocket")
+		err = request.Write(conn)
+		if err != nil {
+			return nil, err
+		}
+		bufferedConn := N.NewBufferedConn(conn)
+		response, err := http.ReadResponse(bufferedConn.Reader(), request)
+		if err != nil {
+			return nil, err
+		}
+		if response.StatusCode != 101 ||
+			!strings.EqualFold(response.Header.Get("Connection"), "upgrade") ||
+			!strings.EqualFold(response.Header.Get("Upgrade"), "websocket") {
+			return nil, fmt.Errorf("unexpected status: %s", response.Status)
+		}
+		return bufferedConn, nil
+	}
+
 	headers := http.Header{}
 	headers.Set("User-Agent", "Go-http-client/1.1") // match golang's net/http
 	if c.Headers != nil {