fs (file system) is an integral Node.js module that supports many file system-related functionalities. It enables actions such reading and writing files, creating and removing directories, and more. Among the common functions offered by the fs module are the following:
- fs.readFile: read a file and return its contents as a Buffer or string
- fs.writeFile: write data to a file, replacing the file if it already exists
- fs.appendFile: append data to a file, creating the file if it does not exist
- fs.unlink: delete a file
- fs.mkdir: create a directory
- fs.readdir: read the contents of a directory
To read a file from an S3 bucket using the fs module in Node.js, you must utilise the AWS SDK for JavaScript in Node.js, which enables access to AWS services from Node.js code.
const AWS = require('aws-sdk');
const fs = require('fs');// Set the region
AWS.config.update({region: 'REGION'});// Create an S3 client
const s3 = new AWS.S3();
const bucketName = 'BUCKET_NAME';
const fileKey = 'FILE_KEY';
// Set the parameters for the download
const params = {
Bucket: bucketName,
Key: fileKey
};
// Create a stream to the file
const file = fs.createWriteStream(fileKey);
// Download the file from S3
s3.getObject(params).createReadStream().pipe(file);
Here is an example of how you can read a file from an S3 bucket using the fs module and the AWS SDK for JavaScript:
This code creates an S3 client using the AWS SDK, then sets the parameters for the file that you want to download (the bucket name and the file key). It creates a stream to the file using the fs.createWriteStream method, then uses the getObject method of the S3 client to download the file and pipe it to the stream.
Note: Don’t forget to replace REGION and BUCKET_NAME with the appropriate values for your S3 bucket and region.
