s3mover/README.md

S3 Mover

A small web app with a Go backend and React frontend for listing, uploading, downloading, and deleting files in an S3 bucket.

Structure

• backend: Go HTTP API for S3 operations
• frontend: React + Vite client

Backend configuration

Set these environment variables before starting the API:

• AWS_REGION: AWS region for the bucket
• S3_BUCKET: target bucket name
• S3_PREFIX: optional folder prefix inside the bucket
• FRONTEND_ORIGIN: allowed browser origin for CORS, for example http://localhost:5173
• SERVER_ADDR: HTTP bind address, default :8080
• AWS_ENDPOINT_URL: optional custom S3-compatible endpoint
• AWS_USE_PATH_STYLE: set to true for MinIO and some S3-compatible providers
• AWS_ACCESS_KEY_ID: access key for S3-compatible storage
• AWS_SECRET_ACCESS_KEY: secret key for S3-compatible storage

Standard AWS credentials are supported through the normal SDK chain. You can also set AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_SESSION_TOKEN.

For DigitalOcean Spaces, a typical configuration looks like:

AWS_REGION=nyc3
S3_BUCKET=your-space-name
AWS_ENDPOINT_URL=https://nyc3.digitaloceanspaces.com
AWS_ACCESS_KEY_ID=your-access-key
AWS_SECRET_ACCESS_KEY=your-secret-key
AWS_USE_PATH_STYLE=false
FRONTEND_ORIGIN=http://localhost:5173

Run locally

Backend:

cd backend
go mod tidy
go run .

Frontend:

cd frontend
npm install
VITE_API_BASE_URL=http://localhost:8080 npm run dev

Then open http://localhost:5173.