Add sftp support for opendal

[Xuanwo]

We can use https://docs.rs/ssh2/latest/ssh2/struct.File.html for that

[PragmaTwice]

Seems pretty interesting. I will try to work on it if it has not been taken.

[Xuanwo]

I have assigned this task to you. Enjoy!

[gaby]

👍🏻 looking forward to this feature!

[silver-ymz]

Could I ask the progress of this feature? If possible, I am willing to help implement it.

[Xuanwo]

Hi, @PragmaTwice, are you currently working on this issue?

[PragmaTwice]

Some attempts but put on hold, feel free to take it over.

[silver-ymz]

We can use https://docs.rs/ssh2/latest/ssh2/struct.File.html for that

This library doesn't support async operation. Maybe we need https://docs.rs/async-ssh2-lite/latest/async_ssh2_lite/sftp/struct.AsyncSftp.html

[PragmaTwice]

This library doesn't support async operation. Maybe we need https://docs.rs/async-ssh2-lite/latest/async_ssh2_lite/sftp/struct.AsyncSftp.html

A few months ago, I tried using openssh-sftp-client library and found it to be quite promising. (it is full async)

[gaby]

This library doesn't support async operation. Maybe we need https://docs.rs/async-ssh2-lite/latest/async_ssh2_lite/sftp/struct.AsyncSftp.html

A few months ago, I tried using openssh-sftp-client library and found it to be quite promising. (it is full async)

That one looks good. One thing to keep in mind is the suggestions from this issue: openssh-rust/openssh-sftp-client#61

[silver-ymz]

openssh only works on unix. Should we concern the compatibility for windows?

[silver-ymz]

And openssh only supports keypair-based authentication. This limits the functionality of password logins.