Read file from aws s3 bucket using node fs

You have a couple options. You can include a callback as a second argument, which will be invoked with any error message and the object. This example is straight from the AWS documentation:

s3.getObject(params, function(err, data) {  if (err) console.log(err, err.stack); // an error occurred  else     console.log(data);           // successful response});

Alternatively, you can convert the output to a stream. There's also an example in the AWS documentation:

var s3 = new AWS.S3({apiVersion: '2006-03-01'});var params = {Bucket: 'myBucket', Key: 'myImageFile.jpg'};var file = require('fs').createWriteStream('/path/to/file.jpg');s3.getObject(params).createReadStream().pipe(file);

This will do it:

new AWS.S3().getObject({ Bucket: this.awsBucketName, Key: keyName }, function(err, data){    if (!err)        console.log(data.Body.toString());});

Since you seem to want to process an S3 text file line-by-line. Here is a Node version that uses the standard readline module and AWS' createReadStream()

const readline = require('readline');const rl = readline.createInterface({    input: s3.getObject(params).createReadStream()});rl.on('line', function(line) {    console.log(line);}).on('close', function() {});