Post to Slack on AWS Lambda (IoT Training)

post_to_slack_on_aws-lambda.py

# for Python 3.7
#
# 以下の２つの環境変数を設定してください (Required ENVs)
# hookUrl = (e.g. `https://hooks.slack.com/services/ANY1/ANY2/ANY3` )
# slackChannel = (e.g. `max_catch_all` )

import json
from urllib.request import Request, urlopen, URLError, HTTPError

import os
HOOK_URL = os.environ['hookUrl']
SLACK_CHANNEL = os.environ['slackChannel']

import logging
logger = logging.getLogger()
logger.setLevel(logging.INFO)

def lambda_handler(event, context):
    logger.info("Event: " + str(event))

    slack_message = {
        'channel': SLACK_CHANNEL,
        'text': str(event)
    }

    req = Request(HOOK_URL, json.dumps(slack_message).encode())
    try:
        logger.info("Post: %s", slack_message)
        with urlopen(req) as response:
            _ = response.read()
    except HTTPError as e:
        logger.error("Request failed: %d %s", e.code, e.reason)
    except URLError as e:
        logger.error("Server connection failed: %s", e.reason)

    return {'statusCode': 200, 'body': json.dumps('end')}