AWS Lambda SNS to Slack Message

sns2slack.py

import json
import base64
import sys
import os

def lambda_handler(event, context):
    
    url = os.environ['slack_incoming_hook']
   
    headers = {
        'Cache-Control': "no-cache"
    }
    
    message = event['Records'][0]['Sns']['Message']
    topic = event['Records'][0]['Sns']['TopicArn']
    print(f"Mesage from topic {topic}:\n{message}")
    
    slack_payload = {
        'channel': os.environ['slak_channel'],
        'text': message
    }
    if 'slack_username' in os.environ:
        slack_payload['username'] = os.environ.get('slack_username')
    
    if 'slack_icon' in os.environ:
        slack_payload['icon_emoji'] = os.environ.get('icon_emoji')
    
    response = requests.request("POST", url, data=payload, headers=headers)
    print(response.text)
    return 'OK'