feature: Keep the memory usage of the service at a stable level

[Rennbon]

add request and response body size limit, it prevents the large body from slowly stretching the memory of the entire service

[Rennbon]

#1225

[erikdubbelboer]

I'm also wondering, why can't you call Request.ReleaseBody() or Response.ReleaseBody() yourself?

[Rennbon]

Because fasthttp is well developed and there are many other supporting respositories available. For a business project, we want to configure the limit of request and response uniformly, so that the upper limit of the mem of the request response can be handled from a macro perspective, instead of repeating the coding in each place for recycling the critical value.

[Rennbon]

I'm also wondering, why can't you call Request.ReleaseBody() or Response.ReleaseBody() yourself?
In addition, some data collection handlers depend on the server, such as prometheus, etc. The body of some scenarios will also be very large.

[erikdubbelboer]

Thanks!

[Rennbon]

My pleasure