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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():
}
}
|
