def write_feed(bucket, folder, region):
    episode_data = get_episode_data(bucket, folder, region)
    feed_path = path.join(folder, FEED_FILENAME)
    domain = DOMAIN.format(bucket=bucket, region=region)
    encoded_path = quote_plus(feed_path, safe='/')
    feed_url = urljoin(domain, encoded_path)
    print(feed_path, feed_url)

    feed_data = {
        'title': escape(folder),
        'description': escape(folder),
        'url': feed_url,
        'path': feed_path,
        'encoded_path': encoded_path,
    }
    feed = rssfeed(feed_data, episode_data)
    print(feed)
    s3.put_object(
        Bucket=bucket,
        Key=feed_path,
        Body=feed,
        ContentType='application/xml'
    )
    return feed_data