Streaming uploads

[kylebarron]

We should allow async iterator input into put. Then we can pass the result of get directly into put and have streaming transfers from one store to another.

[machichima]

This feature would be extremely helpful! We're really looking forward to it. Is there any update on this issue?

[kylebarron]

I attempted it in #54. It compiles fine, but then appeared to hang in my manual tests. I'm not sure what the issue is and haven't had time to look back into it. If you're interested, you can go to that branch and test it out (you can just pip install . from the obstore directory as long as you have Rust installed)

[kylebarron]

It turned out that the only reason for my errors in #54 was that I was hitting my request timeout. Raising the timeout shows that the PR does in fact work.

[rupurt]

You absolute legend @kylebarron! If we ever meet in person I owe you a 6 pack 🍻