Body can be output to log

[pyama86]

hi!
Echo is one of golang's best products.

There are cases where you want to output the body of the request to the log at the beginning of development, so I would like to make this change.

I may develop middleware, but since I become a patch while the difference is small, I want to avoid it if possible.

thanks.

[coveralls]

Coverage increased (+0.1%) to 83.82% when pulling c3139bc on pyama86:request-body-outoputlog into 8173bb8 on labstack:master.

[anjmao]

This is nice, I also wanted something like this, but I think it must be configurable on the middleware like this:

e.Use(middleware.Logger(logBody: true))

because in some cases it can generate huge logs and you may not want that. @vishr What do you think ?

[pyama86]

I agree with your opinion 👍
May I work?

[coveralls]

Coverage increased (+0.04%) to 83.758% when pulling 55087de on pyama86:request-body-outoputlog into 4256489 on labstack:master.

[montanaflynn]

This is cool, we also have custom middleware to do this for the request body. I am wondering how it would be possible to capture the response body for logging as well.

[vishr]

This will be covered in https://github.com/labstack/echo/tree/issue-950