Lambda used to check connection

handler.js

const https = require('https');

exports.handler = async (event) => {
    const url = '';
    const timeout = 4000; // 4 seconds

    return new Promise((resolve) => {
        const options = {
            method: 'GET',
            timeout: timeout,
        };

        const req = https.request(url, options, (res) => {
            let data = '';

            res.on('data', (chunk) => {
                data += chunk;
            });

            res.on('end', () => {
                resolve({
                    statusCode: res.statusCode,
                    message: 'Successfully connected',
                    response: data,
                });
            });
        });

        req.on('error', (err) => {
            const errorDetails = {
                statusCode: 500,
                message: 'Failed to connect',
                reason: err.code || 'Unknown error',
            };

            if (err.code === 'ENOTFOUND') {
                errorDetails.reason = 'DNS resolution failed. The server could not be found.';
            } else if (err.code === 'ETIMEDOUT') {
                errorDetails.reason = 'Connection timed out.';
            } else if (err.code === 'ECONNREFUSED') {
                errorDetails.reason = 'Connection refused by the server.';
            } else if (err.code === 'EHOSTUNREACH') {
                errorDetails.reason = 'Server is unreachable.';
            }

            resolve(errorDetails);
        });

        req.on('timeout', () => {
            req.destroy();
            resolve({
                statusCode: 504,
                message: 'Failed to connect',
                reason: 'Request timed out.',
            });
        });

        req.end();
    });
};