In this guide, we’ll walk through the most secure and efficient ways to handle S3 downloads in a React application. The Core Concept: Security First
Your frontend requests a URL from your backend (or a Lambda function).
const command = new GetObjectCommand({ Bucket: "my-bucket", Key: "file.pdf", ResponseContentDisposition: 'attachment; filename="my-report.pdf"' }); Use code with caution.
Typically, this logic happens on the , but here is how the code looks using the SDK: javascript
async function downloadS3File(key) { try { const result = await Storage.get(key, { download: true }); // Create a blob link to download const url = URL.createObjectURL(result.Body); const a = document.createElement('a'); a.href = url; a.download = key; a.click(); URL.revokeObjectURL(url); } catch (error) { console.error('Error downloading file: ', error); } } Use code with caution. Troubleshooting Common Issues 1. CORS Configuration
When using window.open(url) , the file will often save with a random string of characters. To force a specific filename, your backend must set the Content-Disposition header in the GetObjectCommand : javascript
In this guide, we’ll walk through the most secure and efficient ways to handle S3 downloads in a React application. The Core Concept: Security First
Your frontend requests a URL from your backend (or a Lambda function). download file from s3 bucket in react js
const command = new GetObjectCommand({ Bucket: "my-bucket", Key: "file.pdf", ResponseContentDisposition: 'attachment; filename="my-report.pdf"' }); Use code with caution. In this guide, we’ll walk through the most
Typically, this logic happens on the , but here is how the code looks using the SDK: javascript Typically, this logic happens on the , but
async function downloadS3File(key) { try { const result = await Storage.get(key, { download: true }); // Create a blob link to download const url = URL.createObjectURL(result.Body); const a = document.createElement('a'); a.href = url; a.download = key; a.click(); URL.revokeObjectURL(url); } catch (error) { console.error('Error downloading file: ', error); } } Use code with caution. Troubleshooting Common Issues 1. CORS Configuration
When using window.open(url) , the file will often save with a random string of characters. To force a specific filename, your backend must set the Content-Disposition header in the GetObjectCommand : javascript