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Allow server to push error message to client.

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This commit is contained in:
Juliusz Chroboczek 2020-04-25 02:09:11 +02:00
parent 2cb323ec31
commit cb1782b6b2
2 changed files with 36 additions and 19 deletions
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25
client.go
View file

@ -54,7 +54,13 @@ func (err protocolError) Error() string {
return string(err)
}
func errorToWSCloseMessage(err error) []byte {
type userError string
func (err userError) Error() string {
return string(err)
}
func errorToWSCloseMessage(err error) (string, []byte) {
var code int
var text string
switch e := err.(type) {
@ -63,10 +69,13 @@ func errorToWSCloseMessage(err error) []byte {
case protocolError:
code = websocket.CloseProtocolError
text = string(e)
case userError:
code = websocket.CloseNormalClosure
text = string(e)
default:
code = websocket.CloseInternalServerErr
}
return websocket.FormatCloseMessage(code, text)
return "The server said: " + text, websocket.FormatCloseMessage(code, text)
}
func isWSNormalError(err error) bool {
@ -82,6 +91,7 @@ type clientMessage struct {
Password string `json:"password,omitempty"`
Group string `json:"group,omitempty"`
Value string `json:"value,omitempty"`
Message string `json:"message,omitempty"`
Me *bool `json:"me,omitempty"`
Offer *webrtc.SessionDescription `json:"offer,omitempty"`
Answer *webrtc.SessionDescription `json:"answer,omitempty"`
@ -120,10 +130,15 @@ func startClient(conn *websocket.Conn) (err error) {
if isWSNormalError(err) {
err = nil
} else {
m, e := errorToWSCloseMessage(err)
if m != "" {
c.write(clientMessage{
Type: "error",
Message: m,
})
}
select {
case c.writeCh <- closeMessage{
errorToWSCloseMessage(err),
}:
case c.writeCh <- closeMessage{e}:
case <-c.writerDone:
}
}

4
static/sfu.js
View file

@ -311,6 +311,9 @@ function serverConnect() {
case 'chat':
addToChatbox(m.id, m.username, m.value, m.me);
break;
case 'error':
displayError(m.message);
break;
default:
console.warn('Unexpected server message', m.type);
return;
@ -773,7 +776,6 @@ document.getElementById('disconnectbutton').onclick = function(e) {
socket.close();
}
function start() {
group = decodeURIComponent(location.pathname.replace(/^\/[a-z]*\//, ''));
let title = document.getElementById('title');