w.WriteHeader(500)
			return
		}
		nc, brw, err := w.(Hijacker).Hijack()
		if err != nil {
			t.Error(err)
			return
		}
		defer nc.Close()
		nc.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
		// Switch to a little protocol that capitalize its input lines:
		for {
			line, err := brw.ReadString('\n')
			if err != nil {
				if err != io.EOF {
					t.Error(err)