Filter: logBody("request", "response")

[trkohler]

This filter logs body for the request if body has proper content type. When body is json / xml, it applies formatting.

should resolve: #2282

[trkohler]

closing because streaming approach is preferred and it's being worked on in #2428

[szuecs]

That's also pretty nice to have formatting as option maybe. I did only plain string log. Do you have any use case in mind for the pretty print?
We could do this as option to logBody(). Right now we have only "request" and "response" as options, but we could also add something like "pretty".

[trkohler]

I've noticed that in example there (#2282 (comment)) json was used and I thought that in the most cases users would be interested to log requests/response bodies which have some structure, rather than octet streams / gifs / etc. And because of that, I thought it would be a convenient to support formatting out of the box.