# Enforce Private-file Authorization for Spring Boot

## Summary
Private file access for a Spring Boot app on Ample. Verified on Spring Boot: a role-to-document access model with negative tests (401, 403) and an authorized private-bucket round-trip (private=ok). Build and start: `./mvnw -q -DskipTests package` (or the Gradle wrapper) producing one application jar, then `java -jar` on the jvm-21 template (Temurin JDK 21) with `server.port` read from `PORT`.

## Prerequisites
- A Spring Boot project (`./mvnw -q -DskipTests package` or the Gradle wrapper) producing one application jar, then `java -jar` on the jvm-21 template (Temurin JDK 21) with `server.port` read from `PORT`)
- A PostgreSQL driver reading `DATABASE_URL` at runtime
- A bucket from `ample bucket create` with credentials passed as encrypted `S3_*` environment variables
- An Ample account token with `servers:write`, `databases:read`, `buckets:read`

## Steps
### 1. Build and Start
`./mvnw -q -DskipTests package` (or the Gradle wrapper) producing one application jar, then `java -jar` on the jvm-21 template (Temurin JDK 21) with `server.port` read from `PORT`; the server must bind `0.0.0.0` on `PORT`.

### 2. Create the Bucket and Pass its Credentials
Create it once with `ample bucket create`, then pass endpoint, region, bucket and keys with `--env`; use path-style addressing.

```bash
ample deploy . --name <app_name> --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...
```

### 3. Authorize Before Touching Storage
Return 401 for unauthenticated requests and 403 for the wrong role; keep the bucket unpublished and stream objects through the app.

### 4. Verify
Fetch the live URL and `/p/private-document-library` on the example; on failure read the build and runtime logs.

```bash
ample logs --kind build
```

## Examples
- **Spring Boot Pattern Fixture**: Verified private file access on Spring Boot.

## Success Checks
- App responds on its public URL.
- Private-document-library check from the example.

## Limitations
- Verified on the jvm-21 template at s-1vcpu-2gb; other sizes and Spring Boot major versions are not verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.

## Cost Estimate
- **Monthly Amount**: $10.00 USD
- **Components**:
  - App server: s-1vcpu-1gb
  - Managed PostgreSQL database: s-1vcpu-1gb

## Next Actions
1. Browse the catalog index.
2. Search published recipes by intent, stack, and constraints.
3. Prepare a side-effect-free deployment plan for an authorized project.
4. Read the existing agent authentication setup.