refine tenant api

Signed-off-by: hongming <talonwan@yunify.com>

vendor/gopkg.in/igm/sockjs-go.v2/sockjs/websocket.go

@@ -0,0 +1,97 @@
+package sockjs
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/gorilla/websocket"
+)
+
+// WebSocketReadBufSize is a parameter that is used for WebSocket Upgrader.
+// https://github.com/gorilla/websocket/blob/master/server.go#L230
+var WebSocketReadBufSize = 4096
+
+// WebSocketWriteBufSize is a parameter that is used for WebSocket Upgrader
+// https://github.com/gorilla/websocket/blob/master/server.go#L230
+var WebSocketWriteBufSize = 4096
+
+func (h *handler) sockjsWebsocket(rw http.ResponseWriter, req *http.Request) {
+	conn, err := websocket.Upgrade(rw, req, nil, WebSocketReadBufSize, WebSocketWriteBufSize)
+	if _, ok := err.(websocket.HandshakeError); ok {
+		http.Error(rw, `Can "Upgrade" only to "WebSocket".`, http.StatusBadRequest)
+		return
+	} else if err != nil {
+		rw.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	sessID, _ := h.parseSessionID(req.URL)
+	sess := newSession(sessID, h.options.DisconnectDelay, h.options.HeartbeatDelay)
+	if h.handlerFunc != nil {
+		go h.handlerFunc(sess)
+	}
+
+	receiver := newWsReceiver(conn)
+	sess.attachReceiver(receiver)
+	readCloseCh := make(chan struct{})
+	go func() {
+		var d []string
+		for {
+			err := conn.ReadJSON(&d)
+			if err != nil {
+				close(readCloseCh)
+				return
+			}
+			sess.accept(d...)
+		}
+	}()
+
+	select {
+	case <-readCloseCh:
+	case <-receiver.doneNotify():
+	}
+	sess.close()
+	conn.Close()
+}
+
+type wsReceiver struct {
+	conn    *websocket.Conn
+	closeCh chan struct{}
+}
+
+func newWsReceiver(conn *websocket.Conn) *wsReceiver {
+	return &wsReceiver{
+		conn:    conn,
+		closeCh: make(chan struct{}),
+	}
+}
+
+func (w *wsReceiver) sendBulk(messages ...string) {
+	if len(messages) > 0 {
+		w.sendFrame(fmt.Sprintf("a[%s]", strings.Join(transform(messages, quote), ",")))
+	}
+}
+
+func (w *wsReceiver) sendFrame(frame string) {
+	if err := w.conn.WriteMessage(websocket.TextMessage, []byte(frame)); err != nil {
+		w.close()
+	}
+}
+
+func (w *wsReceiver) close() {
+	select {
+	case <-w.closeCh: // already closed
+	default:
+		close(w.closeCh)
+	}
+}
+func (w *wsReceiver) canSend() bool {
+	select {
+	case <-w.closeCh: // already closed
+		return false
+	default:
+		return true
+	}
+}
+func (w *wsReceiver) doneNotify() <-chan struct{}        { return w.closeCh }
+func (w *wsReceiver) interruptedNotify() <-chan struct{} { return nil }