private void addCookies(final Request request, final HttpRequestPacket requestPacket) {

    final Collection<Cookie> cookies = request.getCookies();
    if (isNonEmpty(cookies)) {
      StringBuilder sb = new StringBuilder(128);
      org.glassfish.grizzly.http.Cookie[] gCookies =
          new org.glassfish.grizzly.http.Cookie[cookies.size()];
      convertCookies(cookies, gCookies);
      CookieSerializerUtils.serializeClientCookies(
          sb, false, config.isRfc6265CookieEncoding(), gCookies);
      requestPacket.addHeader(Header.Cookie, sb.toString());
    }
  }
  public NettyRequest newNettyRequest(
      Request request, boolean forceConnect, ProxyServer proxyServer) throws IOException {

    Uri uri = request.getUri();
    HttpMethod method = forceConnect ? HttpMethod.CONNECT : HttpMethod.valueOf(request.getMethod());
    boolean connect = method == HttpMethod.CONNECT;

    boolean allowConnectionPooling =
        config.isAllowPoolingConnections()
            && (!HttpUtils.isSecure(uri) || config.isAllowPoolingSslConnections());

    HttpVersion httpVersion =
        !allowConnectionPooling || (connect && proxyServer.isForceHttp10())
            ? HttpVersion.HTTP_1_0
            : HttpVersion.HTTP_1_1;
    String requestUri = requestUri(uri, proxyServer, connect);

    NettyBody body = body(request, connect);

    HttpRequest httpRequest;
    NettyRequest nettyRequest;
    if (body instanceof NettyDirectBody) {
      ChannelBuffer buffer = NettyDirectBody.class.cast(body).channelBuffer();
      httpRequest = new DefaultHttpRequest(httpVersion, method, requestUri);
      // body is passed as null as it's written directly with the request
      httpRequest.setContent(buffer);
      nettyRequest = new NettyRequest(httpRequest, null);

    } else {
      httpRequest = new DefaultHttpRequest(httpVersion, method, requestUri);
      nettyRequest = new NettyRequest(httpRequest, body);
    }

    HttpHeaders headers = httpRequest.headers();

    if (!connect) {
      // assign headers as configured on request
      for (Entry<String, List<String>> header : request.getHeaders()) {
        headers.set(header.getKey(), header.getValue());
      }

      if (isNonEmpty(request.getCookies()))
        headers.set(COOKIE, CookieEncoder.encode(request.getCookies()));

      if (config.isCompressionEnforced() && !headers.contains(ACCEPT_ENCODING))
        headers.set(ACCEPT_ENCODING, GZIP_DEFLATE);
    }

    if (body != null) {
      if (body.getContentLength() < 0) headers.set(TRANSFER_ENCODING, HttpHeaders.Values.CHUNKED);
      else headers.set(CONTENT_LENGTH, body.getContentLength());

      if (body.getContentType() != null) headers.set(CONTENT_TYPE, body.getContentType());
    }

    // connection header and friends
    boolean webSocket = isWebSocket(uri.getScheme());
    if (!connect && webSocket) {
      String origin =
          "http://"
              + uri.getHost()
              + ":"
              + (uri.getPort() == -1 ? isSecure(uri.getScheme()) ? 443 : 80 : uri.getPort());
      headers
          .set(UPGRADE, HttpHeaders.Values.WEBSOCKET) //
          .set(CONNECTION, HttpHeaders.Values.UPGRADE) //
          .set(ORIGIN, origin) //
          .set(SEC_WEBSOCKET_KEY, getKey()) //
          .set(SEC_WEBSOCKET_VERSION, "13");

    } else if (!headers.contains(CONNECTION)) {
      String connectionHeaderValue =
          connectionHeader(allowConnectionPooling, httpVersion == HttpVersion.HTTP_1_1);
      if (connectionHeaderValue != null) headers.set(CONNECTION, connectionHeaderValue);
    }

    if (!headers.contains(HOST)) headers.set(HOST, hostHeader(request, uri));

    Realm realm = request.getRealm() != null ? request.getRealm() : config.getRealm();

    // don't override authorization but append
    addAuthorizationHeader(headers, systematicAuthorizationHeader(request, realm));

    setProxyAuthorizationHeader(
        headers, systematicProxyAuthorizationHeader(request, proxyServer, realm, connect));

    // Add default accept headers
    if (!headers.contains(ACCEPT)) headers.set(ACCEPT, "*/*");

    // Add default user agent
    if (!headers.contains(USER_AGENT) && config.getUserAgent() != null)
      headers.set(USER_AGENT, config.getUserAgent());

    return nettyRequest;
  }