slow_download.py

#!/usr/bin/env python
import sys
import time

from argparse import ArgumentParser

from swiftclient.client import (get_auth, get_object)

auth = 'http://127.0.0.1:8080/auth/v1.0'
user = 'test:tester'
key = 'testing'

slowness = 0.5


parser = ArgumentParser()
parser.add_argument('-S', '--slowness', default=slowness, type=float,
                    help='How much sleep between chunks')
parser.add_argument('cont_name', help='cont_name')
parser.add_argument('obj_name', help='obj_name')


def main():
    options = parser.parse_args()
    url, token = get_auth(auth, user, key)

    headers, body = get_object(url, token, options.cont_name, options.obj_name,
                               resp_chunk_size=65000)
    total = headers.get('content-length')
    next_status = time.time() + 1
    downloaded = 0
    for chunk in body:
        downloaded += len(chunk)
        time.sleep(options.slowness)
        if time.time() >= next_status:
            next_status = time.time() + 1
            print '%s/%s' % (downloaded, total)
    print '%s/%s' % (downloaded, total)


if __name__ == "__main__":
    sys.exit(main())