refactor sinkResponseFile and add downloadC

Remote.S3 and Remote.Helper.Http both had similar code to sink a
http-conduit Response to a file; refactor out sinkResponseFile.

downloadC downloads an url to a file using http-conduit, and supports
resuming. Falls back to curl to handle urls that http-conduit does not
support. This is not used yet, but the goal is to replace download with
it.

git-annex.cabal: conduit-extra was not actually used for a long time,
remove the dep. conduit moves into the main dependency list, but since
http-conduit was already in there, and it depends on conduit, that's not
really adding a new build dep.

This commit was supported by the NSF-funded DataLad project.
This commit is contained in:
Joey Hess 2018-04-06 15:58:16 -04:00
parent 0e8564201e
commit 0f6775f1ff
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6 changed files with 138 additions and 35 deletions

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@ -32,3 +32,8 @@ to http-conduit which does not support it. Maybe require users to set
supports netrc?
--[[Joey]]
> Implemented Utility.Url.downloadC that is the (nontrivial)
> download a file with resume support using http-conduit.
> It falls back to curl to handle urls that http-conduit does not support.
> Now we only have to decide what to do about the above edge cases..