Confirmation of Amazon SNS Subscription with disabled `Unsubscribe` Link

confirm_sns_subs_with_disabled_unsubs_link.py

#!/path/to/your_python

#
# Confirmation of Amazon SNS Subscription with disabled `Unsubscribe` Link.
# cf. https://aws.amazon.com/premiumsupport/knowledge-center/prevent-unsubscribe-all-sns-topic/
#
# Usage: ./confirm_sns_subs_with_disabled_unsubs_link.py <URL_to_confirm_SNS_Subscrption>
#

import sys
import boto3
from urllib.parse import urlparse, parse_qs

url_to_confirm_sns_subs = sys.argv[1]

# To parse the URL and query.
#   Notice: items parsed query are 'list' type.
# 
# >>> parsed_query
# {'TopicArn': ['arn:aws:sns:region-name:012345678901:your-topic-name'],
#  'Token': ['<[0-9a-f]+>'],
#  'Endpoint': ['<e.g. mailaddr>']}
parsed_query = parse_qs(urlparse(url_to_confirm_sns_subs).query)

# To get region-name from ARN.
# cf. https://docs.aws.amazon.com/IAM/latest/UserGuide/list_amazonsns.html#amazonsns-resources-for-iam-policies
region = parsed_query['TopicArn'][0].split(':')[3]

# To initialize SNS Client with region-name
sns = boto3.client('sns', region_name=region)

# Confirmation
response = sns.confirm_subscription(
  TopicArn=parsed_query['TopicArn'][0],
  Token=parsed_query['Token'][0],
  AuthenticateOnUnsubscribe='true'
)