Compression configuration options

[kotsius]

Bandit compression seems to be working well, with both deflate and gzip. My understanding is that both are served by the zlib library, and that all Bandit does is pass a single set of parameters to Erlang.

However, the documentation is currently not clear regarding whether gzip compression is configurable. The deflate algorithm is common to deflate/zlib and gzip under the hood, and hence 'deflate_options' can actually refer to both formats. My testing shows that 'deflate_options: [level: #]' has an effect on response size when deflate applies, but no effect when gzip applies. If this is normal, it would help if it was documented.

[mtrudel]

The deflate_options config only affects deflate; there's no mechanism in the underlying :zlib library to configure the behaviour of gzip (see here for the specific place where the config is passed down to :zlib). I've updated Bandit's type docs on this on main; it'll go out in the next release.

Thanks for the note!