// sends it to another server, proxying the response back to the
// client.
//
// 1xx responses are forwarded to the client if the underlying
// transport supports ClientTrace.Got1xxResponse.
type ReverseProxy struct {
	// Rewrite must be a function which modifies
	// the request into a new request to be sent
	// using Transport. Its response is then copied

	newServerRequest := func(tr *panicOnNonReuseTransport) *http.Request {
		req, _ := http.NewRequest("GET", fmt.Sprintf("https://127.0.0.1:%d", ts.Listener.Addr().(*net.TCPAddr).Port), nil)
		trace := &httptrace.ClientTrace{
			GotConn: tr.GotConn,
		}
		return req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
	}

	// client
	clientCACertPool := x509.NewCertPool()
	clientCACertPool.AppendCertsFromPEM(tsCrt)

// exception is HTTP status code 101 (Switching Protocols), which is
// considered a terminal status and returned by [Transport.RoundTrip]. To see the
// ignored 1xx responses, use the httptrace trace package's
// ClientTrace.Got1xxResponse.
//
// Transport only retries a request upon encountering a network error
// if the connection has been already been used successfully and if the

	},
	"net/http/httptrace": {
		{"ClientTrace", Type, 7},
		{"ClientTrace.ConnectDone", Field, 7},
		{"ClientTrace.ConnectStart", Field, 7},
		{"ClientTrace.DNSDone", Field, 7},
		{"ClientTrace.DNSStart", Field, 7},
		{"ClientTrace.GetConn", Field, 7},
		{"ClientTrace.Got100Continue", Field, 7},
		{"ClientTrace.Got1xxResponse", Field, 11},
		{"ClientTrace.GotConn", Field, 7},

		// seeing a 1xx response.
		ctx, cancel := context.WithCancel(context.Background())
		defer cancel()
		ctx = httptrace.WithClientTrace(ctx, &httptrace.ClientTrace{
			Got1xxResponse: func(code int, header textproto.MIMEHeader) error {
				cancel()
				return nil
			},
		})

		req, _ := http.NewRequestWithContext(ctx, "GET", "http://go.dev/", nil)

}

func http2traceWroteHeaders(trace *httptrace.ClientTrace) {
	if trace != nil && trace.WroteHeaders != nil {
		trace.WroteHeaders()
	}
}

func http2traceGot100Continue(trace *httptrace.ClientTrace) {
	if trace != nil && trace.Got100Continue != nil {
		trace.Got100Continue()
	}
}

func http2traceWait100Continue(trace *httptrace.ClientTrace) {

		if t.Method == "GET" || t.Method == "HEAD" {
			return false
		}
		return true
	}

	return false
}

func (t *transferWriter) writeHeader(w io.Writer, trace *httptrace.ClientTrace) error {
	if t.Close && !hasToken(t.Header.get("Connection"), "close") {
		if _, err := io.WriteString(w, "Connection: close\r\n"); err != nil {
			return err
		}
		if trace != nil && trace.WroteHeaderField != nil {

			var cancel context.CancelFunc
			ctx, cancel = context.WithTimeout(req.Context(), timeout)
			defer cancel()

			req = req.WithContext(ctx)
		}

		// setup trace
		trace := &httptrace.ClientTrace{
			GotConn: func(connInfo httptrace.GotConnInfo) {
				callback(connInfo)
			},
		}
		req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))

		response, err := client.Do(req)

			if v, ok := header[h]; ok {
				t.Errorf("%s is %q; must not be sent", h, v)
			}
		}
	}

	var respCounter uint8
	trace := &httptrace.ClientTrace{
		Got1xxResponse: func(code int, header textproto.MIMEHeader) error {
			switch respCounter {
			case 0:

				}
				return false
			}
			return true
		})
		conns := 0
		var info httptrace.GotConnInfo
		ctx := httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
			GotConn: func(v httptrace.GotConnInfo) {
				conns++
				info = v
			},
		})
		req, err := NewRequestWithContext(ctx, "GET", cst.ts.URL, nil)
		if err != nil {
			t.Fatal(err)
		}