Sec web socket protocol (#11)

* 回显子协议的值

* 更新

* 更新

client.go

@@ -36,35 +36,35 @@ var (
 )
 
 type DialOption struct {
-	Header      http.Header
-	u           *url.URL
-	tlsConfig   *tls.Config
-	dialTimeout time.Duration
+	Header               http.Header
+	u                    *url.URL
+	tlsConfig            *tls.Config
+	dialTimeout          time.Duration
+	bindClientHttpHeader *http.Header // 握手成功之后, 客户端获取http.Header,
 	Config
 }
 
-func ClientOptionToConf(opts ...ClientOption) *Config {
+func ClientOptionToConf(opts ...ClientOption) *DialOption {
 	var dial DialOption
 	dial.defaultSetting()
 	for _, o := range opts {
 		o(&dial)
 	}
-	return &dial.Config
+	return &dial
 }
 
-func DialConf(rawUrl string, conf *Config) (*Conn, error) {
-	var dial DialOption
+func DialConf(rawUrl string, conf *DialOption) (*Conn, error) {
 	u, err := url.Parse(rawUrl)
 	if err != nil {
 		return nil, err
 	}
 
-	dial.u = u
-	dial.dialTimeout = defaultTimeout
-	if dial.Header == nil {
-		dial.Header = make(http.Header)
+	conf.u = u
+	conf.dialTimeout = defaultTimeout
+	if conf.Header == nil {
+		conf.Header = make(http.Header)
 	}
-	return dial.Dial()
+	return conf.Dial()
 }
 
 // https://datatracker.ietf.org/doc/html/rfc6455#section-4.1
@@ -222,6 +222,10 @@ func (d *DialOption) Dial() (c *Conn, err error) {
 		return nil, err
 	}
 
+	if d.bindClientHttpHeader != nil {
+		*d.bindClientHttpHeader = rsp.Header.Clone()
+	}
+
 	cd := maybeCompressionDecompression(rsp.Header)
 	if d.decompression {
 		d.decompression = cd

client_option_test.go

@@ -106,4 +106,54 @@ func Test_ClientOption(t *testing.T) {
 			t.Error("not run server:method fail")
 		}
 	})
+
+	t.Run("6.1 Dial: WithClientBindHTTPHeader", func(t *testing.T) {
+		ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			_, err := Upgrade(w, r)
+			if err != nil {
+				t.Error(err)
+			}
+		}))
+
+		defer ts.Close()
+
+		url := strings.ReplaceAll(ts.URL, "http", "ws")
+		h := make(http.Header)
+		con, err := Dial(url, WithClientBindHTTPHeader(&h), WithClientHTTPHeader(http.Header{
+			"Sec-WebSocket-Protocol": []string{"token"},
+		}))
+		if err != nil {
+			t.Error(err)
+		}
+		defer con.Close()
+
+		if h["Sec-Websocket-Protocol"][0] != "token" {
+			t.Error("header fail")
+		}
+	})
+
+	t.Run("6.2 Dial: WithClientBindHTTPHeader", func(t *testing.T) {
+		ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			_, err := Upgrade(w, r)
+			if err != nil {
+				t.Error(err)
+			}
+		}))
+
+		defer ts.Close()
+
+		url := strings.ReplaceAll(ts.URL, "http", "ws")
+		h := make(http.Header)
+		con, err := DialConf(url, ClientOptionToConf(WithClientBindHTTPHeader(&h), WithClientHTTPHeader(http.Header{
+			"Sec-WebSocket-Protocol": []string{"token"},
+		})))
+		if err != nil {
+			t.Error(err)
+		}
+		defer con.Close()
+
+		if h["Sec-Websocket-Protocol"][0] != "token" {
+			t.Error("header fail")
+		}
+	})
 }

client_options.go

@@ -22,38 +22,45 @@ import (
 
 type ClientOption func(*DialOption)
 
-// 配置tls.config
+// 1.配置tls.config
 func WithClientTLSConfig(tls *tls.Config) ClientOption {
 	return func(o *DialOption) {
 		o.tlsConfig = tls
 	}
 }
 
-// 配置http.Header
+// 2.配置http.Header
 func WithClientHTTPHeader(h http.Header) ClientOption {
 	return func(o *DialOption) {
 		o.Header = h
 	}
 }
 
-// 配置握手时的timeout
+// 3.配置握手时的timeout
 func WithClientDialTimeout(t time.Duration) ClientOption {
 	return func(o *DialOption) {
 		o.dialTimeout = t
 	}
 }
 
-// 配置压缩
+// 4.配置压缩
 func WithClientCompression() ClientOption {
 	return func(o *DialOption) {
 		o.compression = true
 	}
 }
 
-// 配置压缩和解压缩
+// 5.配置压缩和解压缩
 func WithClientDecompressAndCompress() ClientOption {
 	return func(o *DialOption) {
 		o.compression = true
 		o.decompression = true
 	}
 }
+
+// 6.获取http header
+func WithClientBindHTTPHeader(h *http.Header) ClientOption {
+	return func(o *DialOption) {
+		o.bindClientHttpHeader = h
+	}
+}

server_handshake.go

@@ -23,11 +23,12 @@ import (
 )
 
 var (
-	ErrNotFoundHijacker   = errors.New("not found Hijacker")
-	bytesHeaderUpgrade    = []byte("HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept:")
-	bytesHeaderExtensions = []byte("Sec-WebSocket-Extensions: permessage-deflate; server_no_context_takeover; client_no_context_takeover\r\n")
-	bytesCRLF             = []byte("\r\n")
-	bytesColon            = []byte(": ")
+	ErrNotFoundHijacker             = errors.New("not found Hijacker")
+	bytesHeaderUpgrade              = []byte("HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept:")
+	bytesHeaderExtensions           = []byte("Sec-WebSocket-Extensions: permessage-deflate; server_no_context_takeover; client_no_context_takeover\r\n")
+	bytesCRLF                       = []byte("\r\n")
+	strGetSecWebSocketProtocolKey   = "Sec-WebSocket-Protocol"
+	bytesPutSecWebSocketProtocolKey = []byte("Sec-WebSocket-Protocol: ")
 )
 
 type ConnOption struct {
@@ -67,6 +68,17 @@ func prepareWriteResponse(r *http.Request, w io.Writer, cnf *Config) (err error)
 		}
 	}
 
+	v = r.Header.Get(strGetSecWebSocketProtocolKey)
+	if len(v) > 0 {
+		if _, err = w.Write(bytesPutSecWebSocketProtocolKey); err != nil {
+			return
+		}
+
+		if err = writeHeaderVal(w, StringToBytes(v)); err != nil {
+			return err
+		}
+	}
+
 	_, err = w.Write(bytesCRLF)
 	return err
 }
@@ -111,7 +123,6 @@ func checkRequest(r *http.Request) (ecode int, err error) {
 		return http.StatusUpgradeRequired, ErrSecWebSocketVersion
 	}
 
-	// TODO Sec-WebSocket-Protocol
 	// TODO Sec-WebSocket-Extensions
 	return 0, nil
 }