[CORE-1601] add hosting files upload

[opalczynski]

CI will always failt till the next Python Library release - 5.3, which will support hosting.

[opalczynski]

@23doors @zhebr @ilu2112 Anyone? :)

[23doors]

I think that for now we should hide parameter as it doesn't make sense just yet

[23doors]

I would suggest that we simplify the flow for now.
Remove:
syncano hosting <instance_name> --list
syncano hosting <instance_name> --create --label <new_label>
and parameter from other places.

And instead when user does:
syncano hosting <instance_name> --publish <base_dir>
then check if there is a hosting with domain=default, if not create it (with auto generated label like: "Default hosting") and use that for publish.

As we won't have custom domain SSL support from the start, this should make it easier to use.
And once we have custom domains we could just add --domain parameter to publish (and if hosting with specific domain doesn't exist, ask if it should be created automatically).

We don't really care about list/create that much

[opalczynski]

OK :) No problem, changes on the way.

[23doors]

Not sure if sleep is needed here but if we're dealing with 1 API request (and sleep after each one) then sleep(0.02) is enough (as it still gives us less than 60/s at best). Once we support retry-after in python lib, we can remove it altogether.

[opalczynski]

All this throttling thing is a little bit tricky - because client have no information about other requests (made by others clients) - so your idea to implement retry-after is the best way to handle it (servers knows how many requests should be handled - from all clients).

Will change to 0.02 here.

[23doors]

Yeah, sleep in client code is still prone to errors as like you said - there can be other requests going on. Retry-after can actually be a good remedy for that.

[23doors]

lgtm! 👍