[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2825: rewrite CLI commands to use treq or twisted.web, not httplib

[Tahoe-LAFS]

#2825: rewrite CLI commands to use treq or twisted.web, not httplib
-------------------------------+---------------------------
 Reporter:  warner             |          Owner:
     Type:  task               |         Status:  new
 Priority:  normal             |      Milestone:  undecided
Component:  code-frontend-cli  |        Version:  1.11.0
 Keywords:                     |  Launchpad Bug:
-------------------------------+---------------------------
 For various reasons, when we first wrote the CLI side of the WAPI frontend
 (tools like `tahoe put` and `tahoe ls`), we decided to go low-tech, and
 use stdlib `httplib`. I think I was intending these scripts to serve as
 examples for folks who wanted to incorporate Tahoe client-side API usage
 into their own apps, so I didn't want to burden them with Twisted
 concepts.

 But the blocking behavior of those scripts makes it a hassle to exercise
 them in our trial-based test framework (we have to use `deferToThread()`
 each time). And `httplib` is a lousy choice for an educational tool: if we
 rewrote them today and really wanted blocking/sync style, we'd use
 `requests`.

 So I'm thinking that we should rewrite those tools with `treq`, the
 Deferred-style variant of `requests` (which uses twisted.web under the
 hood). Then we could remove the `deferToThread` calls from e.g.
 `test.cli.test_cli.CLITestMixin`.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2825>
Tahoe-LAFS <https://Tahoe-LAFS.org>
secure decentralized storage