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reverseproxy: Only handle websocket protocol (#6740)
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parent
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@ -398,13 +398,13 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyht
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}
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// websocket over http2, assuming backend doesn't support this, the request will be modified to http1.1 upgrade
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// TODO: once we can reliably detect backend support this, it can be removed for those backends
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if r.ProtoMajor == 2 && r.Method == http.MethodConnect && r.Header.Get(":protocol") != "" {
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if r.ProtoMajor == 2 && r.Method == http.MethodConnect && r.Header.Get(":protocol") == "websocket" {
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clonedReq.Header.Del(":protocol")
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// keep the body for later use. http1.1 upgrade uses http.NoBody
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caddyhttp.SetVar(clonedReq.Context(), "h2_websocket_body", clonedReq.Body)
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clonedReq.Body = http.NoBody
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clonedReq.Method = http.MethodGet
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clonedReq.Header.Set("Upgrade", r.Header.Get(":protocol"))
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clonedReq.Header.Set("Upgrade", "websocket")
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clonedReq.Header.Set("Connection", "Upgrade")
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key := make([]byte, 16)
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_, randErr := rand.Read(key)
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