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document that go-quic copies :protocol into r.Proto

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Tony Biondo 2025-10-15 20:42:42 -04:00 • committed by Francis Lavoie
parent d474fbd3aa
commit 43b77f1f07
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modules/caddyhttp/reverseproxy/reverseproxy.go
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@ -411,6 +411,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyht
}
// websocket over http2 or http3, assuming backend doesn't support this, the request will be modified to http1.1 upgrade
// The go-quic http3 implementation also puts :protocol in r.Proto for CONNECT requests (quic-go/quic-go/headers.go@70-72,185,203)
// TODO: once we can reliably detect backend support this, it can be removed for those backends
if (r.ProtoMajor == 2 && r.Method == http.MethodConnect && r.Header.Get(":protocol") == "websocket") ||
(r.ProtoMajor == 3 && r.Method == http.MethodConnect && r.Proto == "websocket") {