MalformedXML: The XML you provided was not well-formed or did not validate against our published schema

Question

I am having this weird issue while working with AWS S3. I am working on application by which I can store the images to AWS bucket. Using Multer as middleware and S3FS library to connect and upload to AWS.

But the following error pops up when I try uploading the content.

"MalformedXML: The XML you provided was not well-formed or did not validate against our publis hed schema"

Index.js

var express = require('express');
var router = express();
var multer = require('multer');
var fs = require('fs');
var S3FS = require('s3fs');
var upload = multer({
  dest: 'uploads'
})
var S3fsImpl = new S3FS('bucket-name', {
  region: 'us-east-1',
  accessKeyId: 'XXXXXXXXXXXX',
  secretAccessKey: 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
});

/* GET home page. */
router.get('/', function (req, res, next) {
  res.render('profile', {
    title: 'Express'
  });
});

router.post('/testupload', upload.single('file'), function (req, res) {
  var file = req.file;
  console.log(file);

  var path = req.file.path;
  var stream = fs.createReadStream(path);
  console.log(stream);

  S3fsImpl.writeFile(file.name, stream).then(function () {
    fs.unlink(file.path, function (err) {
      if (err) {
        console.log(err);
      }
    });
    res.redirect('/profile');
  })
});

module.exports = router;

EDIT Output:

{ fieldname: 'file',
  originalname: '441_1.docx',
  encoding: '7bit',
  mimetype: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
  destination: 'uploads',
  filename: '662dcbe544804e4f50dfef1f52b40d22',
  path: 'uploads\\662dcbe544804e4f50dfef1f52b40d22',
  size: 13938 }
ReadStream {
  _readableState:
   ReadableState {
     objectMode: false,
     highWaterMark: 65536,
     buffer: BufferList { head: null, tail: null, length: 0 },
     length: 0,
     pipes: null,
     pipesCount: 0,
     flowing: null,
     ended: false,
     endEmitted: false,
     reading: false,
     sync: true,
     needReadable: false,
     emittedReadable: false,
     readableListening: false,
     resumeScheduled: false,
     defaultEncoding: 'utf8',
     ranOut: false,
     awaitDrain: 0,
     readingMore: false,
     decoder: null,
     encoding: null },
  readable: true,
  domain: null,
  _events: { end: [Function] },
  _eventsCount: 1,
  _maxListeners: undefined,
  path: 'uploads\\662dcbe544804e4f50dfef1f52b40d22',
  fd: null,
  flags: 'r',
  mode: 438,
  start: undefined,
  end: undefined,
  autoClose: true,
  pos: undefined,
  bytesRead: 0 }

Package.json

{
  "name": "aws-s3-images",
  "version": "1.0.0",
  "private": true,
  "scripts": {
    "start": "node ./bin/www"
  },
  "dependencies": {
    "body-parser": "~1.17.1",
    "connect-multiparty": "^2.0.0",
    "cookie-parser": "~1.4.3",
    "debug": "~2.6.3",
    "express": "~4.15.2",
    "hbs": "~4.0.1",
    "morgan": "~1.8.1",
    "multer": "^1.3.0",
    "s3fs": "^2.5.0",
    "serve-favicon": "~2.4.2"
  },
  "description": "AWS S3 uploading images",
  "main": "app.js",
  "devDependencies": {},
  "keywords": [
    "javascript"
  ],
  "author": "reeversedev",
  "license": "MIT"
}

Answer 1

So if anyone still facing this issue, in my case the issue only happens when you pass an empty array of objects you wanna delete, it causes the server to crash with the following error "MalformedXML".

const data: S3.DeleteObjectsRequest = {
  Bucket: bucketName,
  Delete: {
    Objects: [], <<---here
  },
}

return s3Bucket.deleteObjects(data).promise()

so just check if the array of Objects keys isn't equal to zero before sending that request to aws.