FileServerHack.java

	  final DefaultFileRegion region = new DefaultFileRegion(file.getChannel(),  0, length);
	  final ByteBuf fb = ctx().alloc().directBuffer((int)length);
	  region.transferTo(new WritableByteChannel(){
		@Override
		public boolean isOpen() {
			return true;
		}
		@Override
		public void close() throws IOException { /* No Op */}
		@Override
		public int write(final ByteBuffer src) throws IOException {
			final int start = fb.writerIndex();
			fb.writeBytes(src);
			return fb.writerIndex() - start;
		}		  
	  }, 0);
	  FullHttpResponse fhr = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, fb);
	  fhr.headers().add(request().headers());
	  final ChannelFuture future = ctx().writeAndFlush(fhr);