The backend fetches the file from S3 and streams it to the client. This is safer for very sensitive data but puts more load on your server. 2. Implementation: The Presigned URL Method
This is the most efficient method because it offloads the actual data transfer to AWS infrastructure rather than your server. Step A: Generate the URL (Node.js Backend) react download s3 file
To ensure your React app can actually "see" and download these files, you must configure your S3 bucket correctly. Securely Using AWS S3 Pre-signed URLs - HackerOne The backend fetches the file from S3 and
import { S3Client, GetObjectCommand } from "@aws-sdk/client-s3"; import { getSignedUrl } from "@aws-sdk/s3-request-presigner"; const client = new S3Client({ region: "us-east-1" }); export const getDownloadUrl = async (key) => { const command = new GetObjectCommand({ Bucket: "your-bucket-name", Key: key, }); // URL expires in 60 seconds return await getSignedUrl(client, command, { expiresIn: 60 }); }; Use code with caution. Step B: Trigger Download in React Implementation: The Presigned URL Method This is the
