use internal client to delete object metadata

internal_delete_object_metadata.py

#!/usr/bin/python
import argparse

import swift.common.internal_client as internal_client


DESCRIPTION = 'Delete object metadata via internal client. Use with extreme ' \
              'caution. Must be run on a node with an internal-client.conf ' \
              'file and access to the swift proxy server endpoint.'


def delete_object_metadata(args):
    client = internal_client.InternalClient(
        '/etc/swift/internal-client.conf', 'hack', 1)
    # since swift 2.15.0 x-backend-replication causes x-delete-at to be ignored
    # so we can update an expired object
    metadata = {'x-backend-replication': 'true'}
    existing = client.get_object_metadata(
        args.account, args.container, args.object,
        metadata_prefix='x-object-meta-', headers=metadata)
    if existing and not args.force:
        print('Found existing metadata: %s' % existing)
        print('Aborting (use --force to delete existing metadata).')
        return 1

    client.set_object_metadata(
        args.account, args.container, args.object, metadata)


def main(args=None):
    parser = argparse.ArgumentParser(description=DESCRIPTION)
    parser.add_argument('account')
    parser.add_argument('container')
    parser.add_argument('object')
    parser.add_argument(
        '--force', '-f', action='store_true', default=False,
        help="Don't ask before deleting existing metadata.")
    args = parser.parse_args(args)
    return delete_object_metadata(args)


if __name__ == '__main__':
    exit(main())