expressjsHow do I use Express.js to upload a file to Amazon S3?

The following example demonstrates how to use Express.js to upload a file to Amazon S3.

// require the AWS SDK
const AWS = require('aws-sdk');

// configure the keys for accessing AWS
AWS.config.update({
    accessKeyId: 'ACCESS_KEY_ID',
    secretAccessKey: 'SECRET_ACCESS_KEY'
});

// create an instance of S3
const s3 = new AWS.S3();

// define the bucket and file name
const bucketName = 'BUCKET_NAME';
const fileName = 'FILE_NAME';

// read content from the file
const fileContent = fs.readFileSync(fileName);

// set up the parameters for upload
const uploadParams = {
    Bucket: bucketName,
    Key: fileName,
    Body: fileContent
};

// upload the file to S3
s3.upload(uploadParams, function (err, data) {
    if (err) {
        console.log('Error', err);
    }
    if (data) {
        console.log('Uploaded in:', data.Location);
    }
});

Output example

Uploaded in: <S3_Location>

1. Require the AWS SDK - const AWS = require('aws-sdk');
2. Configure the keys for accessing AWS - AWS.config.update({ accessKeyId: 'ACCESS_KEY_ID', secretAccessKey: 'SECRET_ACCESS_KEY' });
3. Create an instance of S3 - const s3 = new AWS.S3();
4. Define the bucket and file name - const bucketName = 'BUCKET_NAME'; const fileName = 'FILE_NAME';
5. Read content from the file - const fileContent = fs.readFileSync(fileName);
6. Set up the parameters for upload - const uploadParams = { Bucket: bucketName, Key: fileName, Body: fileContent };
7. Upload the file to S3 - s3.upload(uploadParams, function (err, data) { ... });

Helpful links

• AWS SDK for JavaScript
• Uploading Objects Using the AWS SDK for JavaScript

Edit this code on GitHub