Retrieve files from Amazon S3 using JavaScript

I'm currently working with a javascript file that's intended to download a text file from one of my S3 buckets. However, after running this file using "node file.js", nothing happens and there's no output. Is there something I'm missing or doing wrong here? Appreciate any help!

var AWS = require('aws-sdk');
var s3 = new AWS.S3();

var credentials = new AWS.SharedIniFileCredentials({profile: 'personal-account'});
AWS.config.credentials = credentials;

s3.getObject(
  { Bucket: "mybucket", Key: "testing.txt" },
  function (error, data) {
    if (error != null) {
      alert("Failed to retrieve an object: " + error);
    } else {
      alert("Loaded " + data.ContentLength + " bytes");
    }
  }
);

print("this file has been executed")
javascriptnode.jsamazon-s3

Answer №1

JavaScript does not have a print function, and the nodejs environment does not support alert.

Instead, you should use something like console.log.

var AWS = require('aws-sdk');
var s3 = new AWS.S3();

var credentials = new AWS.SharedIniFileCredentials({profile: 'personal-account'});
AWS.config.credentials = credentials;

s3.getObject(
  { Bucket: "mybucket", Key: "testing.txt" },
  function (error, data) {
    if (error != null) {
      console.log("Failed to retrieve an object: " + error);
    } else {
      console.log("Loaded " + data.ContentLength + " bytes");
    }
  }
);

console.log("this file has been executed")

If you are not seeing any output or errors, then there may be a problem with your setup that is difficult to diagnose.

Answer №2

Establish the S3 Client only after configuring your credentials:

var AWS = require('aws-sdk');

var credentials = new AWS.SharedIniFileCredentials({profile: 'personal-account'});
AWS.config.credentials = credentials;

var s3 = new AWS.S3();

s3.getObject(
  { Bucket: "mybucket", Key: "testing.txt" },
  function (error, data) {
    if (error != null) {
      console.log("Failed to fetch object: " + error);
    } else {
      console.log("Retrieved " + data.ContentLength + " bytes");
    }
  }
);

console.log("execution of this file has been completed");

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