s3 vfs is broken

[dan_tofan]

start mc, type:
cd ​s3://
(ensure relevant keys are present as env variables)
After a few seconds, there is a long error dump, at the end:
ssl.CertificateError?: hostname u'...s3.amazonaws.com' doesn't match either of '*.s3.amazonaws.com', 's3.amazonaws.com'

I investigated this a bit. It seems the current version of mc s3 extension uses boto, which is now deprecated by Amazon in favor of boto3 (check ​https://github.com/boto/boto/issues/2836). So, it needs a rewrite to boto3.
I can help with this. Do you accept contributions?

Thank you,
Dan

mc --version
GNU Midnight Commander 4.8.20
Built with GLib 2.48.2
Using the S-Lang library with terminfo database
With builtin Editor
With subshell support as default
With support for background operations
With mouse support on xterm
With internationalization support
With multiple codepages support
Virtual File Systems: cpiofs, tarfs, sfs, extfs, ftpfs, fish
Data types: char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64;

[andrew_b]

Replying to dan_tofan:

I can help with this. Do you accept contributions?

Yes, we do.
I thunk at first you should connect with the author of s3 fixes. A added him to Cc:. He's e-mail can be found in s3 plugin code.

[dan_tofan]

Hi Andrew,

I emailed Dmitry (at his gmail address) a week ago and no answer yet.
Please advise.

Thanks,
Dan

[andrew_b]

Ok, feel free to make a patch to fix the S3 bug.

[zaytsev]

There is a PR with patch for Python 3 support:

​https://github.com/MidnightCommander/mc/pull/149

I think we can remove Python detection and switch to /usr/bin/env python also here.

I can do it in cleanup branch or create another branch based on cleanup. There are changes there which would cause a lot of conflicts when reformatting.

[andrew_b]

Replying to zaytsev:

I can do it in cleanup branch or create another branch based on cleanup.

Currently cleanup branch has ~40 commits. I'm ready merge it to master. Then you can create the branch for this ticket based on master.

[zaytsev]

Sounds good!

Maybe you can still take ​https://github.com/MidnightCommander/mc/pull/85 in the cleanup branch? Didn't check whether this patch is correct though. The idea is to highlight files called COMMIT_EDITMSG as diff. And maybe we can replace confusing ..\* with .\+ :-)

Oh, and case sensitivity is annoying. Maybe another fun project after mc.ext ...

[andrew_b]

Replying to zaytsev:

Maybe you can still take ​https://github.com/MidnightCommander/mc/pull/85 in the cleanup branch?

Done.

Didn't check whether this patch is correct though.

The patch is correct.

The idea is to highlight files called COMMIT_EDITMSG as diff.

I got it.

And maybe we can replace confusing ..\* with .\+ :-)

Need to test that.

[zaytsev]

So it should be at least somehow working now since the PR for Python 3 is in, but it's still not ported to latest AWS SDK and the code is scary as hell. I guess easier to rewrite than port...