78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
package sockjs
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import (
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strings"
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)
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func (h *handler) jsonp(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("content-type", "application/javascript; charset=UTF-8")
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req.ParseForm()
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callback := req.Form.Get("c")
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if callback == "" {
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http.Error(rw, `"callback" parameter required`, http.StatusInternalServerError)
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return
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}
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rw.WriteHeader(http.StatusOK)
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rw.(http.Flusher).Flush()
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sess, _ := h.sessionByRequest(req)
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recv := newHTTPReceiver(rw, 1, &jsonpFrameWriter{callback})
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if err := sess.attachReceiver(recv); err != nil {
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recv.sendFrame(cFrame)
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recv.close()
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return
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}
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select {
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case <-recv.doneNotify():
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case <-recv.interruptedNotify():
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}
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}
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func (h *handler) jsonpSend(rw http.ResponseWriter, req *http.Request) {
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req.ParseForm()
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var data io.Reader
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data = req.Body
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formReader := strings.NewReader(req.PostFormValue("d"))
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if formReader.Len() != 0 {
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data = formReader
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}
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if data == nil {
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http.Error(rw, "Payload expected.", http.StatusInternalServerError)
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return
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}
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var messages []string
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err := json.NewDecoder(data).Decode(&messages)
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if err == io.EOF {
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http.Error(rw, "Payload expected.", http.StatusInternalServerError)
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return
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}
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if err != nil {
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http.Error(rw, "Broken JSON encoding.", http.StatusInternalServerError)
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return
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}
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sessionID, _ := h.parseSessionID(req.URL)
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h.sessionsMux.Lock()
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defer h.sessionsMux.Unlock()
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if sess, ok := h.sessions[sessionID]; !ok {
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http.NotFound(rw, req)
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} else {
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_ = sess.accept(messages...) // TODO(igm) reponse with http.StatusInternalServerError in case of err?
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rw.Header().Set("content-type", "text/plain; charset=UTF-8")
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rw.Write([]byte("ok"))
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}
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}
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type jsonpFrameWriter struct {
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callback string
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}
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func (j *jsonpFrameWriter) write(w io.Writer, frame string) (int, error) {
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return fmt.Fprintf(w, "%s(%s);\r\n", j.callback, quote(frame))
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}
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