AWS Lambda URL Monitor

aws_lambda_url_monitor.py

from urllib.request import urlopen
from datetime import datetime, timedelta

def validate(expected, res):
    return expected in str(res)

def lambda_handler(event, context):
    try:
        if not validate(event['expected'], urlopen(event['site']).read()):
            raise Exception('Validation failed')
    except:
        print('Check failed!')
        raise
    else:
        print('Check passed!')
        return 'OK'
    finally:
        print('Check complete at {}'.format(str(datetime.utcnow() + timedelta(hours=9))))