Hi, Christian. The main idea for HTTP is that if the request header says "Accept-Encoding: gzip" and the web server can do gzip compression, the the response header will contain "Content-Encoding: gzip" and the content will be gzipped.
I know most web servers support "on the fly" compression. You should check if your client can send deal with it, most of the times it requires only configuration. Perhaps it is already doing it! Even if both client and server can deal with compression, if the request header doesn't specify Accept-Encoding with a value that the server recognizes, the response will come decompressed. By the way, your question is all but OFF TOPIC!! :-) Cheers, Tiago.
