The "chunk" argument must be of type string or an instance of Buffer
36,649
Solution 1
Remove this res.writeHead(200, { 'Content-Type': 'text/html' });
And instead of res.end(data)
use res.send(data)
or better yet res.send({ data })
.
EDIT I didn't notice that you didn't use express, try this:
res.writeHead(200, { 'Content-Type': 'application/json' });
res.write(JSON.stringify(data));
res.end();
Solution 2
In case this may help someone, I was using data type other than String
, Number
to be exact, so I changed it to String
to resolve this error
Author by
anish anil
Updated on February 10, 2022Comments
-
anish anil about 2 years
I'm running the following code and it fails with the below error.
AWS Code to list all objects inside a bucker
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}`)
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.
The "chunk" 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.<anonymous> (D:\js\Extra\starter\index.js:30:13) at Request.<anonymous> (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.<anonymous> (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:38:9) { message: 'The "chunk" 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 }