Can't read content of Request

[niccocorsa94]

I'm trying to develop code that can filter requests, modify them, etc. The Proxy intercepts requests correctly and is able to display the correct Uri for example. However, I cannot read the contents of the http package. In fact, the request.content (). ReadableBytes () function returns 0.

HttpProxyServer server =
DefaultHttpProxyServer.bootstrap()
.withAddress(new InetSocketAddress("localhost", 8080))
.withTransparent(true)
.withFiltersSource(new HttpFiltersSourceAdapter() {
@OverRide
public int getMaximumRequestBufferSizeInBytes() {
return 512 * 1024;
}
@OverRide
public int getMaximumResponseBufferSizeInBytes() {
return 50 * 1024 * 1024;
}
public HttpFilters filterRequest(HttpRequest originalRequest, ChannelHandlerContext ctx) {
return new HttpFiltersAdapter(originalRequest) {
@OverRide
public HttpResponse clientToProxyRequest(HttpObject httpObject) {
FullHttpRequest request = (FullHttpRequest) httpObject;
CompositeByteBuf contentBuf = (CompositeByteBuf) request.content();
System.out.println(request.getUri());
System.out.println(request.content().readableBytes());

So, why request.content().readableBytes() returns always 0 ?