whatsapp-bot/lib/fetcher.js

const fetch = require('node-fetch');

const getBase64 = async (url) => {
    const response = await fetch(url, { headers: { 'User-Agent': 'okhttp/4.5.0' } });
    if (!response.ok) throw new Error(`unexpected response ${response.statusText}`);
    const buffer = await response.buffer();
    const videoBase64 = `data:${response.headers.get('content-type')};base64,` + buffer.toString('base64');
    if (buffer)
        return videoBase64;
};

exports.getBase64 = getBase64;