1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
package sockjs
import (
"encoding/json"
"fmt"
"io"
"net/http"
"strings"
)
func (h *handler) jsonp(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("content-type", "application/javascript; charset=UTF-8")
req.ParseForm()
callback := req.Form.Get("c")
if callback == "" {
http.Error(rw, `"callback" parameter required`, http.StatusInternalServerError)
return
} else if invalidCallback.MatchString(callback) {
http.Error(rw, `invalid character in "callback" parameter`, http.StatusBadRequest)
return
}
rw.WriteHeader(http.StatusOK)
rw.(http.Flusher).Flush()
sess, _ := h.sessionByRequest(req)
recv := newHTTPReceiver(rw, 1, &jsonpFrameWriter{callback})
if err := sess.attachReceiver(recv); err != nil {
recv.sendFrame(cFrame)
recv.close()
return
}
select {
case <-recv.doneNotify():
case <-recv.interruptedNotify():
}
}
func (h *handler) jsonpSend(rw http.ResponseWriter, req *http.Request) {
req.ParseForm()
var data io.Reader
data = req.Body
formReader := strings.NewReader(req.PostFormValue("d"))
if formReader.Len() != 0 {
data = formReader
}
if data == nil {
http.Error(rw, "Payload expected.", http.StatusInternalServerError)
return
}
var messages []string
err := json.NewDecoder(data).Decode(&messages)
if err == io.EOF {
http.Error(rw, "Payload expected.", http.StatusInternalServerError)
return
}
if err != nil {
http.Error(rw, "Broken JSON encoding.", http.StatusInternalServerError)
return
}
sessionID, _ := h.parseSessionID(req.URL)
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 http.StatusInternalServerError in case of err?
rw.Header().Set("content-type", "text/plain; charset=UTF-8")
rw.Write([]byte("ok"))
}
}
type jsonpFrameWriter struct {
callback string
}
func (j *jsonpFrameWriter) write(w io.Writer, frame string) (int, error) {
return fmt.Fprintf(w, "%s(%s);\r\n", j.callback, quote(frame))
}
|
