final DefaultFullHttpRequest r = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, "/test");
r.headers().set(HttpHeaders.Names.CONTENT_TYPE, Transports.CONTENT_TYPE_FORM);
if (data == null) {
final ByteBuf byteBuf = Unpooled.copiedBuffer("d=", CharsetUtil.UTF_8);
r.content().writeBytes(byteBuf);
byteBuf.release();
} else {
final ByteBuf byteBuf = Unpooled.copiedBuffer("d=" + data, CharsetUtil.UTF_8);
r.content().writeBytes(byteBuf);
byteBuf.release();
}