refine tenant api

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

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

@@ -0,0 +1,88 @@
+package sockjs
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+)
+
+var (
+	cFrame              = closeFrame(2010, "Another connection still open")
+	xhrStreamingPrelude = strings.Repeat("h", 2048)
+)
+
+func (h *handler) xhrSend(rw http.ResponseWriter, req *http.Request) {
+	if req.Body == nil {
+		httpError(rw, "Payload expected.", http.StatusInternalServerError)
+		return
+	}
+	var messages []string
+	err := json.NewDecoder(req.Body).Decode(&messages)
+	if err == io.EOF {
+		httpError(rw, "Payload expected.", http.StatusInternalServerError)
+		return
+	}
+	if _, ok := err.(*json.SyntaxError); ok || err == io.ErrUnexpectedEOF {
+		httpError(rw, "Broken JSON encoding.", http.StatusInternalServerError)
+		return
+	}
+	sessionID, err := h.parseSessionID(req.URL)
+	if err != nil {
+		http.Error(rw, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	h.sessionsMux.Lock()
+	defer h.sessionsMux.Unlock()
+	if sess, ok := h.sessions[sessionID]; !ok {
+		http.NotFound(rw, req)
+	} else {
+		_ = sess.accept(messages...)                                 // TODO(igm) reponse with SISE in case of err?
+		rw.Header().Set("content-type", "text/plain; charset=UTF-8") // Ignored by net/http (but protocol test complains), see https://code.google.com/p/go/source/detail?r=902dc062bff8
+		rw.WriteHeader(http.StatusNoContent)
+	}
+}
+
+type xhrFrameWriter struct{}
+
+func (*xhrFrameWriter) write(w io.Writer, frame string) (int, error) {
+	return fmt.Fprintf(w, "%s\n", frame)
+}
+
+func (h *handler) xhrPoll(rw http.ResponseWriter, req *http.Request) {
+	rw.Header().Set("content-type", "application/javascript; charset=UTF-8")
+	sess, _ := h.sessionByRequest(req) // TODO(igm) add err handling, although err should not happen as handler should not pass req in that case
+	receiver := newHTTPReceiver(rw, 1, new(xhrFrameWriter))
+	if err := sess.attachReceiver(receiver); err != nil {
+		receiver.sendFrame(cFrame)
+		receiver.close()
+		return
+	}
+
+	select {
+	case <-receiver.doneNotify():
+	case <-receiver.interruptedNotify():
+	}
+}
+
+func (h *handler) xhrStreaming(rw http.ResponseWriter, req *http.Request) {
+	rw.Header().Set("content-type", "application/javascript; charset=UTF-8")
+	fmt.Fprintf(rw, "%s\n", xhrStreamingPrelude)
+	rw.(http.Flusher).Flush()
+
+	sess, _ := h.sessionByRequest(req)
+	receiver := newHTTPReceiver(rw, h.options.ResponseLimit, new(xhrFrameWriter))
+
+	if err := sess.attachReceiver(receiver); err != nil {
+		receiver.sendFrame(cFrame)
+		receiver.close()
+		return
+	}
+
+	select {
+	case <-receiver.doneNotify():
+	case <-receiver.interruptedNotify():
+	}
+}