svg.js

var svgToMiniDataURI = require("mini-svg-data-uri");

var http = require('http');
var https = require('https');

const url = process.argv[2];
var client = http;
if (url.startsWith("https")){
  client = https;
}

client.get(url, (res) => {
  const { statusCode } = res;
  const contentType = res.headers['content-type'];

  let error;
  if (statusCode !== 200) {
    error = new Error('Request Failed.\n' +
                      `Status Code: ${statusCode}`);
  }
  if (error) {
    console.error(error.message);
    // consume response data to free up memory
    res.resume();
    return;
  }

  res.setEncoding('utf8');
  let rawData = '';
  res.on('data', (chunk) => { rawData += chunk; });
  res.on('end', () => {
    try {
      var optimizedSVGDataURI = svgToMiniDataURI(rawData);
      console.log(optimizedSVGDataURI);
    } catch (e) {
      console.error(e.message);
    }
  });
}).on('error', (e) => {
  console.error(`Got error: ${e.message}`);
});