WIP: Add withLimit functionality

[Rohith-Raju]

Initial commit that closes #271

Changes Made are

• Added a new func newBodyWrapperLimit
• Added a private limit field and introduced the WithLimit() func
• Test cases for withLimit func

Pending changes

• Formatting error messages and making them human-readable.
• More unit tests
• End-to-End tests

[Rohith-Raju]

@gavv Your thoughts on the implementation? I need some help with error messages. I'll reach out on chat 😄

[coveralls]

Coverage: 95.064% (-0.003%) from 95.067% when pulling 3706030 on Rohith-Raju:withLimit into fc83351 on gavv:master.

[github-actions]

☔ The latest upstream change (presumably these) made this pull request unmergeable. Please resolve the merge conflicts.

[gavv]

Hi,

The approach used in this patch is wrong. It's not allowed to read the whole body in bodyWrapper constructor - if you look at bodyWrapper's code, you'll see that it intentionally delays reading until Read/Close/GetBody is called first time.

Also even if it was acceptable approach, it seems that it's implemented incorrectly, because you're just dropping everything you've read from body.

We currently have another PR that modifies bodyWrapper: #342, which will conflict with this one. It makes sense to postpone this issue until #342 is merged, and re-implement it from scratch based on updated bodyWrapper.