Upload files into local folders

handleLocalUpload.js

const fs = require('fs').promises
const path = require('path');

const baseDir = path.join(__dirname, '../uploads')

const getUniqueFilename = () => {
  var timestamp = (new Date()).getTime();
  var randomInteger = Math.floor((Math.random() * 1000000) + 1);

  return `${timestamp}_${randomInteger}.png`;
};

const handleLocalUpload = async (base64Img) => {
  const data = base64Img.replace(/^data:image\/\w+;base64,/, '')
  const getName = getUniqueFilename()

  try {
    await fs.writeFile(`${baseDir}/${getName}`, data, { encoding: 'base64' })
  } catch (error) {
    console.error(error)
  }
}

module.exports = handleLocalUpload


///

handleLocalUpload('data:image/png;base64,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')