title: The "chunk" argument must be of type string or an instance of Buffer
body: <p>I'm running the following code and it fails with the below error.</p>
  <p>AWS Code to list all objects inside a bucker</p>
  <pre><code>const http = require('http');
  const host = '127.0.0.1';
  const port = 5000;
  const path = require('path')
  const url = require('url')
  const fs = require('fs')
  var AWS = require('aws-sdk');
  
  
  
  const laptopDate = JSON.parse(fs.readFileSync(`${__dirname}/data/data.json`, `utf-8`))
  
  AWS.config.update({accessKeyId: '***', secretAccessKey: '***', region: 'ap-south-1'});
  s3 = new AWS.S3({apiVersion: '2006-03-01'});
  
  var params = { 
      Bucket: 'bucket-name'
  }
  
  const server = http.createServer(function(req, res){
      const path = url.parse(req.url, true).pathname
      const id = url.parse(req.url, true).query.id
  
      if (path === 'bucket' || path === '/')
        s3.listObjects(params, function (err, data) {
          if(err) throw err;
          res.writeHead(200, { 'Content-Type': 'text/html' });
          //const output = JSON.parse(data)
          console.log(data)
          res.end(data)
        });
  });
  
  server.listen(port, host, function(req, res) {
      console.log(`Server is listening on ${host} and ${port}`)
  </code></pre>
  <p>The first output which is console.log displays everything as expected.
  However the res.end to render the output to the screen fails with the below error.</p>
  <pre><code>The &quot;chunk&quot; argument must be of type string or an instance of Buffer. Received an instance of Object
      at ServerResponse.end (_http_outgoing.js:752:13)
      at Response.&lt;anonymous&gt; (D:\js\Extra\starter\index.js:30:13)
      at Request.&lt;anonymous&gt; (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:364:18)
      at Request.callListeners (D:\js\Extra\starter\node_modules\aws-sdk\lib\sequential_executor.js:106:20)
      at Request.emit (D:\js\Extra\starter\node_modules\aws-sdk\lib\sequential_executor.js:78:10)
      at Request.emit (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:683:14)
      at Request.transition (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:22:10)
      at AcceptorStateMachine.runTo (D:\js\Extra\starter\node_modules\aws-sdk\lib\state_machine.js:14:12)
      at D:\js\Extra\starter\node_modules\aws-sdk\lib\state_machine.js:26:10
      at Request.&lt;anonymous&gt; (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:38:9) {
    message: 'The &quot;chunk&quot; argument must be of type string or an instance of Buffer. Received an instance of Object',
    code: 'ERR_INVALID_ARG_TYPE',
    time: 2020-05-18T08:39:24.916Z
  }
  </code></pre>