AWS Lambda Function to send a message on Slack

aws_lambda_slack_messenger.js

// Simple slack messager for AWS Lambda
// I use it on my code to warn me if there's any runtime error.
const request = require("request");

const settings = require('./config.json');

exports.handler = (event, context, callback) => {
    const options = { 
        method: 'POST',
        url: settings.slack_webhook,
        body: { text: event.message },
        json: true
    };
    request(options, (error, response, body) => {
        if (error) callback(error);
        else {
            callback(null, body);
        }
    });
}

config.json

{
    "slack_webhook": "YOUR_SLACK_WEBHOOK_URL_HERE"
}

Yeah, simple as pie. But can be helpful, so here it is.