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def download(url, local_path=None):
    import urllib2
    logger = logging.getLogger()
    resp = urllib2.urlopen(url)

    content_disp = resp.info().get('Content-Disposition')

    if local_path:
        local_path = local_path
    elif content_disp:
        local_path = content_disp.split('filename=')[1].strip('\'\" ')
    else:
        local_path = os.path.basename(url)

    if os.path.exists(local_path):
        logger.warning('%s exists, not saved', local_path)
    else:
        with open(local_path, 'wb') as f:
            f.write(resp.read())
            logger.info('Saved as %s', local_path)

    return local_path