Not working with official static pluigin

[morigs]

When using with official static plugin all static paths return 200 with Content-Length:0 and empty body.

Looks like it related to how this plugin handles streams. It expects response.stream to be present, but static plugin sets response.body to stream

[RafalGoslawski]

Hi. I've just stubbed my toe on this issue.

The cause for me seems to be that the mapResponse() call returns nothing (undefined) when the compression should not happen, and should instead return the original response. See https://github.com/vermaysha/elysia-compress/blob/master/src/main.ts#L150

I've changed the empty returns on lines 143 and 150 to return buffer and now images served with static plugin that used to have empty body are rendered correctly.

There's 2 other empty returns in that function.

@vermaysha Could you have a look? Do you need help with this one? I would need to dig into how this is supposed to work and it would take a bit of time for me, but maybe it's a quick fix for you? It could use an early return for all cases where the compression is not needed.