swiftclient download --output to stdout doesn't work

[clayg]

The swift commnad line client's download command has an --output option to change the name of the downloaded object when it's written to disk, the help message also describes the ability to set the --output/out_file option to the literal string value '-' to specify that ouptut should be written to stdout.

It doesn't work though. It used to.

The SwiftService class is yielding out the response before reading it, but after entering the _SwiftReader context manager who validates that all bytes were read against the content_length on exit.

I think there's a general capability we could add to SwiftService that allows it to yield out the unopened SwiftReaders in the case where the caller wants to handle download/reading the HTTP response (e.g. write data back out to another socket w/o touching slow disk) - but there may be a quicker solution to just getting the '-' option working which requires only a single object download request.

Here's what it looks like now:

$ swift download test test -o -
Error downloading object 'test/test': 'Error downloading test: read_length != content_length, 0 != 8'

It should look more like:

$ swift download test test -o -
awesome

[clayg (clay-gerrard)]

Looks like this is being handled over here:

https://bugs.launchpad.net/python-swiftclient/+bug/1399256

[Joel Wright (joel-wright-k)]

New python 3.x compatible fix proposed (sorry, I didn't see the previous chain of bug reports before I dived in to fix this!).
Review: https://review.openstack.org/144899

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-swiftclient 2.4.0 release.