HTTPUpgrade 0-RTT (#3152)

* Add ed to enable HTTPUpgrade 0-RTT

https://github.com/XTLS/Xray-core/issues/3128#issuecomment-2002563369

* WebSocket hub.go MaxHeaderBytes: 4096 -> 8192

infra/conf/transport_internet.go

@@ -172,12 +172,10 @@ func (c *WebSocketConfig) Build() (proto.Message, error) {
 		}
 	}
 	config := &websocket.Config{
-		Path:   path,
-		Header: header,
-		Ed:     ed,
-	}
-	if c.AcceptProxyProtocol {
-		config.AcceptProxyProtocol = c.AcceptProxyProtocol
+		Path:                path,
+		Header:              header,
+		AcceptProxyProtocol: c.AcceptProxyProtocol,
+		Ed:                  ed,
 	}
 	return config, nil
 }
@@ -190,12 +188,22 @@ type HttpUpgradeConfig struct {
 
 // Build implements Buildable.
 func (c *HttpUpgradeConfig) Build() (proto.Message, error) {
-	config := &httpupgrade.Config{
-		Path: c.Path,
-		Host: c.Host,
+	path := c.Path
+	var ed uint32
+	if u, err := url.Parse(path); err == nil {
+		if q := u.Query(); q.Get("ed") != "" {
+			Ed, _ := strconv.Atoi(q.Get("ed"))
+			ed = uint32(Ed)
+			q.Del("ed")
+			u.RawQuery = q.Encode()
+			path = u.String()
+		}
 	}
-	if c.AcceptProxyProtocol {
-		config.AcceptProxyProtocol = c.AcceptProxyProtocol
+	config := &httpupgrade.Config{
+		Path:                path,
+		Host:                c.Host,
+		AcceptProxyProtocol: c.AcceptProxyProtocol,
+		Ed:                  ed,
 	}
 	return config, nil
 }

transport/internet/httpupgrade/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.32.0
-// 	protoc        v4.25.1
+// 	protoc        v4.23.1
 // source: transport/internet/httpupgrade/config.proto
 
 package httpupgrade
@@ -28,6 +28,7 @@ type Config struct {
 	Path                string `protobuf:"bytes,2,opt,name=path,proto3" json:"path,omitempty"`
 	Host                string `protobuf:"bytes,3,opt,name=host,proto3" json:"host,omitempty"`
 	AcceptProxyProtocol bool   `protobuf:"varint,4,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
+	Ed                  uint32 `protobuf:"varint,5,opt,name=ed,proto3" json:"ed,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -83,6 +84,13 @@ func (x *Config) GetAcceptProxyProtocol() bool {
 	return false
 }
 
+func (x *Config) GetEd() uint32 {
+	if x != nil {
+		return x.Ed
+	}
+	return 0
+}
+
 var File_transport_internet_httpupgrade_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_httpupgrade_config_proto_rawDesc = []byte{
@@ -91,13 +99,14 @@ var file_transport_internet_httpupgrade_config_proto_rawDesc = []byte{
 	0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x23, 0x78,
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-	0x64, 0x65, 0x22, 0x6a, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04,
+	0x64, 0x65, 0x22, 0x7a, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04,
 	0x70, 0x61, 0x74, 0x68, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x70, 0x61, 0x74, 0x68,
 	0x12, 0x12, 0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04,
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 	0x72, 0x6f, 0x78, 0x79, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x18, 0x04, 0x20,
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-	0x50, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x4a, 0x04, 0x08, 0x01, 0x10, 0x02, 0x42, 0x8b,
+	0x50, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x12, 0x0e, 0x0a, 0x02, 0x65, 0x64, 0x18, 0x05,
+	0x20, 0x01, 0x28, 0x0d, 0x52, 0x02, 0x65, 0x64, 0x4a, 0x04, 0x08, 0x01, 0x10, 0x02, 0x42, 0x8b,
 	0x01, 0x0a, 0x27, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e,
 	0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x68,
 	0x74, 0x74, 0x70, 0x75, 0x70, 0x67, 0x72, 0x61, 0x64, 0x65, 0x50, 0x01, 0x5a, 0x38, 0x67, 0x69,

transport/internet/httpupgrade/config.proto

@@ -13,4 +13,6 @@ message Config {
   string host = 3;
 
   bool accept_proxy_protocol = 4;
-}
+
+  uint32 ed = 5;
+}

transport/internet/httpupgrade/dialer.go

@@ -81,7 +81,20 @@ func dialhttpUpgrade(ctx context.Context, dest net.Destination, streamSettings *
 		return nil, err
 	}
 
-	return &ConnRF{Conn: conn, Req: req, First: true}, nil
+	connRF := &ConnRF{
+		Conn:  conn,
+		Req:   req,
+		First: true,
+	}
+
+	if transportConfiguration.Ed == 0 {
+		_, err = connRF.Read([]byte{})
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return connRF, nil
 }
 
 func dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {

transport/internet/websocket/hub.go

@@ -129,7 +129,7 @@ func ListenWS(ctx context.Context, address net.Address, port net.Port, streamSet
 			ln:   l,
 		},
 		ReadHeaderTimeout: time.Second * 4,
-		MaxHeaderBytes:    4096,
+		MaxHeaderBytes:    8192,
 	}
 
 	go func() {