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Can someone explain what it means when I see Accept-Encoding: gzip,deflate when listening with ncat?

Does it mean the body is compressed? And if so, how can I decompress it?

$ nc -lnvp 4000 Ncat: Version 7.70 ( https://nmap.org/ncat ) Ncat: Listening on :::4000 Ncat: Listening on 0.0.0.0:4000 Ncat: Connection from 10.10.10.10. Ncat: Connection from 10.10.10.10:33096. POST /?watch_id=example HTTP/1.1 Accept-Charset: UTF-8 Content-Length: 0 Host: example.com:4000 Connection: Keep-Alive User-Agent: Apache-HttpClient/4.5.10 (Java/15.0.1) Accept-Encoding: gzip,deflate
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It means the client can accept a response which has been compressed using the DEFLATE algorithm. https://en.wikipedia.org/wiki/Deflate This algorithm is also used in gzip compression format.

It does not mean the response will be compressed - that requires the server to be configured to compress, which is normally settable per file type. For example there is no point trying to compress jpegs, but for a length text output such as the html body or css, it can reduce bandwidth - at the cost of the server's CPU in compression.

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