[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3761: Fake client/server pair implementing proposed GBS Python interface

[Tahoe-LAFS]

#3761: Fake client/server pair implementing proposed GBS Python interface
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 Reporter:  itamarst  |          Owner:
     Type:  task      |         Status:  new
 Priority:  normal    |      Milestone:  HTTP Storage Protocol
Component:  unknown   |        Version:  n/a
 Keywords:            |  Launchpad Bug:
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 In order to refactor the Tahoe-LAFS client code to support two protocols
 in parallel, we need some implementation of a new low-level client storage
 Python interface (let's call it `IStorageClient`). The production
 `IStorageClient` implementation will talk the GBS HTTP protocol to the
 storage server.

 However, since the wire protocol is going to have to be audited, and since
 having a (verified) fake implementation is useful for writing more
 isolated tests, a useful first step would be a `IStorageClient`
 implementation that is implemented in-process.

 The deliverables for this will be:

 1. A new interface, `IStorageClient`, corresponding the the proposed HTTP
 protocol.
 2. A compliance test suite for `IStorageClient` providers.
 3. A (verified) fake `IStorageClient`. Since it won't talk over the
 network, there is no need for a separate server.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3761>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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