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Don't forward CloseAbnormalClosure(1006) and CloseTLSHandshake(1015) as close frames #25

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Don't forward CloseAbnormalClosure(1006) and CloseTLSHandshake(1015) as close frames #25

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11 changes: 9 additions & 2 deletions websocketproxy.go
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Original file line number Diff line number Diff line change
Expand Up @@ -181,11 +181,18 @@ func (w *WebsocketProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
m := websocket.FormatCloseMessage(websocket.CloseNormalClosure, fmt.Sprintf("%v", err))
if e, ok := err.(*websocket.CloseError); ok {
if e.Code != websocket.CloseNoStatusReceived {
m = websocket.FormatCloseMessage(e.Code, e.Text)
m = nil
// Following codes are not valid on the wire so just close the
// underlying TCP connection without sending a close frame.
if e.Code != websocket.CloseAbnormalClosure && e.Code != websocket.CloseTLSHandshake {
m = websocket.FormatCloseMessage(e.Code, e.Text)
}
}
}
errc <- err
dst.WriteMessage(websocket.CloseMessage, m)
if m != nil {
dst.WriteMessage(websocket.CloseMessage, m)
}
break
}
err = dst.WriteMessage(msgType, msg)
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