Implement getters for named file fields

[SuperFluffy]

PR Type

Feature

PR Checklist

• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• A changelog entry has been made for the appropriate packages.
• Format code with the latest stable rustfmt.
• (Team) Label with affected crates and semver status.

Overview

I wanted to change ContentDisposition to always be attachment no matter the underlying file type. But since there is currently no way to retrieve the current content disposition of NamedFile, I would have to guess the filename parameter for this header.

And since the other fields might also potentially be interesting to users, getter methods for those were added as well.

Open questions

I did not add pub fn flags(&self) -> &Flags, because having the bit mask is quite meaningless without knowing what the bits stand for. Since there is no set_flags setter either, should we add methods like pub fn is_FLAG_set(&self) -> bool? For example, pub fn is_etag_set(&self) -> bool?

[SuperFluffy]

Are you fine with the tests being doc tests that just check for compilation, similar to the path and file getters?

Also, should I add some methods to check if flags are set?

[robjtede]

otherwise, looks okay. for is_*_set, we can omit it for now unless someone brings a use case

yes, doc tests would be enough

[robjtede]

would call this metadata

[robjtede]

superseded by #2689 due to restricted branch

thanks for getting this added 👍🏻