Image Upload to S3 From Node.js

upload.js

const http = require("http");
const https = require("https");
const AWS = require('aws-sdk');
const formidable = require("formidable");
const uuid = require("uuid");

let server = http.createServer(launch);
let s3 = new AWS.S3({
 // s3 credentials
});

function uploadToS3(file, destFileName, callback) {
  let uploadParams = {Bucket: config.bucket.name, Key: destFileName, Body: ''};
  let fileStream = fs.createReadStream(file.path);
  fileStream.on('error', function(err) {
    console.log('File Error', err);
  });
  
  uploadParams.Body = fileStream;
  deleteFile(file.path);
  s3.upload(uploadParams, callback);
}

function deleteFile(filePath) {
  fs.unlink(filePath, function (err) {
    if (err) {
      console.error(err);
    }
    console.log('Temp File Delete');
  });
}

function launch (request, response) {
  var form = new formidable.IncomingForm();
  form.parse(request, function (error, fields, files) {
    let fileId = uuid.v4();
    let filename = `user-photos/${fileId}.jpg`;
    let file = files.selfie;
    
    if (!/^image\/(jpe?g|png)$/i.test(file.type)) {
      deleteFile(file.path);
      response.write('{"status": 403, "message": "Expects Image File. Please try again."}');
      return response.end();
    }
    
    uploadToS3(file, filename, function (error, data) {
      if (error) {
        console.log(error);
        response.write('{"status": 442, "message": "Yikes! Error uploading your photo. Please try again."}');
        return response.end();
      } 
      else if (data) {
        response.write(JSON.stringify({status: 200, uri: data.Location}));
        return response.end();
      } 
      else {
        response.write('{"status": 442, "message": "Yikes! Error saving your photo. Please try again."}');
        return response.end();
      }
    })
  }
}