Download Files from AWS S3 Bucket in Node.js - Step by Step Guide

├Źndice
  1. Introduction:
  2. Step-by-Step Guide:
    1. Step 1: Setting up AWS S3 Credentials
    2. Step 2: Installing AWS SDK for Node.js
    3. Step 3: Initializing AWS SDK
    4. Step 4: Downloading Files from S3 Bucket
  3. Conclusion:

Introduction:

Amazon S3 (Simple Storage Service) is a cloud storage service provided by Amazon Web Services (AWS). It is a scalable, durable, and highly available object storage service that allows users to store and retrieve data from anywhere on the internet. In this article, we will discuss how to download files from an AWS S3 bucket using Node.js.

Step-by-Step Guide:

Step 1: Setting up AWS S3 Credentials

To access the AWS S3 bucket, we need to provide valid AWS credentials. You can create an IAM user with S3 permissions and generate an access key and secret key.

Step 2: Installing AWS SDK for Node.js

We need to install the AWS SDK for Node.js to interact with the S3 bucket. We can install it using npm, the Node.js package manager.

npm install aws-sdk

Step 3: Initializing AWS SDK

We need to initialize the AWS SDK with our credentials and the AWS region.

const AWS = require('aws-sdk');
AWS.config.update({
    accessKeyId: 'YOUR_ACCESS_KEY_ID',
    secretAccessKey: 'YOUR_SECRET_ACCESS_KEY',
    region: 'YOUR_AWS_REGION'
});

Step 4: Downloading Files from S3 Bucket

We can use the getObject method of the S3 class in AWS SDK to download a file from the S3 bucket.

const s3 = new AWS.S3();
const params = {
    Bucket: 'BUCKET_NAME',
    Key: 'FILE_KEY'
};
s3.getObject(params, (err, data) => {
    if (err) {
        console.error(err);
    } else {
        console.log(data.Body.toString());
    }
});

In the above code, we first create an S3 object and pass the bucket name and file key as parameters. We then call the getObject method with these parameters and a callback function. The callback function takes two parameters, an error object and the data object. If there is an error, we log it to the console. Otherwise, we can access the file contents using the data.Body property.

Conclusion:

In this article, we have discussed how to download files from AWS S3 bucket using Node.js. We went through the step-by-step guide and learned how to set up AWS S3 credentials, install AWS SDK for Node.js, initialize AWS SDK, and download files from S3 bucket using the getObject method. With this knowledge, you can easily download files from an AWS S3 bucket using Node.js.

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