Resuming errored downloads

[bwarre471]

What's the problem this feature will solve?

When installation is done, downloaded packages are cached. But not in the case download of one package failed. With resuming downloads, on files that are already at the computers, adding offset in https request, we can resume download.

On slow internet connections, downloading 1GB package is doom if it often disconnects, therefore, if file is partially downloaded, we could resume this download.

Describe the solution you'd like

I would like, that if some download was interrupted by the disconnection it could be continued, not reseted.

Alternative Solutions

Only alternative now is downloading again.

Additional context

pip install $bigpackage

Code of Conduct

• I agree to follow the PSF Code of Conduct.

[uranusjr]

Duplicate of #4796

Please consider searching for existing issues before opening new in the future.