[PATCH 5 of 6] lfs: add support for serving blob files

[Yuya Nishihara]

On Thu, 29 Mar 2018 23:26:03 -0400, Matt Harbison wrote:
> >>      elif method == b'GET':
> >>          checkperm('pull')
> >>
> >> -    return False
> >> +        res.status = hgwebcommon.statusmessage(HTTP_OK)
> >> +        res.headers[b'Content-Type'] = b'application/octet-stream'
> >> +
> >> +        # TODO: figure out how to send back the file in chunks,  
> >> instead of
> >> +        #       reading the whole thing.
> >> +        res.setbodybytes(localstore.read(oid))
> >
> > setbodygen()?
> 
> I saw that, but then it isn't clear to me how to close the file  
> descriptor, both in the normal and exceptional cases.

WSGI spec says the returned "iterator" may have close().

https://www.python.org/dev/peps/pep-0333/

Perhaps we'll have to fix the request object and hgweb to handle that, and
add a file-like wrapper which can be used in place of filechunkiter().