w.Header().Set("Connection", "close")
			fmt.Fprintf(w, "Hello.")
		},
		"/hijack": func(w ResponseWriter, r *Request) {
			c, _, _ := w.(Hijacker).Hijack()
			c.Write([]byte("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nHello."))
			c.Close()
		},
		"/hijack-panic": func(w ResponseWriter, r *Request) {
			c, _, _ := w.(Hijacker).Hijack()
			c.Write([]byte("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nHello."))
			c.Close()

	testWriteHeaderAfterWrite(t, http1Mode, true)
}
func testWriteHeaderAfterWrite(t *testing.T, mode testMode, hijack bool) {
	var errorLog lockedBytesBuffer
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		if hijack {
			conn, _, _ := w.(Hijacker).Hijack()
			defer conn.Close()
			conn.Write([]byte("HTTP/1.1 200 OK\r\nContent-Length: 6\r\n\r\nfoo"))

				proxyCh <- r
				// Implement an entire CONNECT proxy
				if r.Method == "CONNECT" {
					hijacker, ok := w.(Hijacker)
					if !ok {
						t.Errorf("hijack not allowed")
						return
					}
					clientConn, _, err := hijacker.Hijack()
					if err != nil {
						t.Errorf("hijacking failed")
						return
					}
					res := &Response{
						StatusCode: StatusOK,

// Lookup returns the object in scope s with the given name if such an
// object exists; otherwise the result is nil.
func (s *Scope) Lookup(name string) Object {
	obj := resolve(name, s.elems[name])
	// Hijack Lookup for "any": with gotypesalias=1, we want the Universe to
	// return an Alias for "any", and with gotypesalias=0 we want to return
	// the legacy representation of aliases.
	//

// Lookup returns the object in scope s with the given name if such an
// object exists; otherwise the result is nil.
func (s *Scope) Lookup(name string) Object {
	obj := resolve(name, s.elems[name])
	// Hijack Lookup for "any": with gotypesalias=1, we want the Universe to
	// return an Alias for "any", and with gotypesalias=0 we want to return
	// the legacy representation of aliases.
	//

	w.WriteHeader(StatusExpectationFailed)
	w.finishRequest()
}

// Hijack implements the [Hijacker.Hijack] method. Our response is both a [ResponseWriter]
// and a [Hijacker].
func (w *response) Hijack() (rwc net.Conn, buf *bufio.ReadWriter, err error) {
	if w.handlerDone.Load() {
		panic("net/http: Hijack called after ServeHTTP finished")
	}
	w.disableWriteContinue()
	if w.wroteHeader {

	const backendStatus = 404
	backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "GET" && r.FormValue("mode") == "hangup" {
			c, _, _ := w.(http.Hijacker).Hijack()
			c.Close()
			return
		}
		if len(r.TransferEncoding) > 0 {
			t.Errorf("backend got unexpected TransferEncoding: %v", r.TransferEncoding)
		}
		if r.Header.Get("X-Forwarded-For") == "" {

	if err != nil {
		return nil, err
	}

	if req.isH2Upgrade() {
		// Because it's neither chunked, nor declared:
		req.ContentLength = -1

		// We want to give handlers a chance to hijack the
		// connection, but we need to prevent the Server from
		// dealing with the connection further if it's not
		// hijacked. Set Close to ensure that:
		req.Close = true
	}
	return req, nil
}

	if strings.Contains(request.URL.RawQuery, "watch=true") {
		hijacker, ok := response.(http.Hijacker)
		if !ok {
			return
		}
		connection, _, err := hijacker.Hijack()
		if err != nil {
			return
		}
		defer connection.Close()
		time.Sleep(30 * time.Second)
	}
}

// testServerAndClientConfig returns a server that listens and a config that can reference it

		{"(*ClientConn).Do", Method, 0},
		{"(*ClientConn).Hijack", Method, 0},
		{"(*ClientConn).Pending", Method, 0},
		{"(*ClientConn).Read", Method, 0},
		{"(*ClientConn).Write", Method, 0},
		{"(*ProxyRequest).SetURL", Method, 20},
		{"(*ProxyRequest).SetXForwarded", Method, 20},
		{"(*ReverseProxy).ServeHTTP", Method, 0},
		{"(*ServerConn).Close", Method, 0},
		{"(*ServerConn).Hijack", Method, 0},