## Enforce private-file authorization for React Router

### Summary
Private file access for a React Router app on Ample. Verified on React Router: a role-to-document access model with negative tests (401, 403) and an authorized private-bucket round-trip (private=ok). Build and start: react-router build then react-router-serve on the node-22 template.

### Representative Queries
- Enforce private-file authorization for React Router
- Where can I host Enforce private-file authorization built with React Router?
- I need application identity integration, per-file access rules and negative authorization tests.

### Resource Requirements
- primitive:compute
- primitive:postgres
- primitive:s3-compatible-object-storage

### Infrastructure Requirements
1. **Compute**
   - Status: verified
   - Summary: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.

2. **Postgres**
   - Status: verified
   - Summary: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.

3. **S3-compatible object storage**
   - Status: verified
   - Summary: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

### Prerequisites
- A React Router project (react-router build then react-router-serve on the node-22 template)
- 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

### Tested Configuration
- Template: node-22
- Runtime: node
- Size: s-1vcpu-1gb
- Install: npm install
- Build: npm run build --if-present
- Start: npm run start

### Workflow Steps
1. **Build and start**
   - Body: react-router build then react-router-serve on the node-22 template; the server must bind 0.0.0.0 on PORT.

2. **Create the bucket and pass its credentials**
   - Body: Create it once with `ample bucket create`, then pass endpoint, region, bucket and keys with --env; use path-style addressing.
   - Command: ample deploy . --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**
   - Body: Return 401 for unauthenticated requests and 403 for the wrong role; keep the bucket unpublished and stream objects through the app.

4. **Verify**
   - Body: Fetch the live URL and /p/private-document-library on the example; on failure read the build and runtime logs.
   - Command: ample logs  --kind build

### Examples
- **Title**: React Router pattern fixture
  **Description**: Verified private file access on React Router.
  **Source Ref**: tests/deploy-canaries/react-router-patterns

### Success Checks
1. **App responds on its public URL**  
   - Kind: http_get  
   - Path: /  
   - Expect: ample canary react router patterns

2. **Private-document-library check from the example**  
   - Kind: http_get  
   - Path: /p/private-document-library  
   - Expect: see the pattern fixture checks.

### Limitations
- Verified on the node-22 template at s-1vcpu-1gb; other sizes and React Router major versions are not verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified.
- PutObject and GetObject with path-style addressing are verified; other S3 operations are not.

### Cost Estimate
- Currency: USD
- Monthly Amount: 10.0
- Authoritative: true
- Basis: size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty
- Components:
  - **App server**
    - Size: s-1vcpu-1gb
    - Quantity: 1.0
    - Monthly Amount: 5.0
  - **Managed PostgreSQL database**
    - Size: s-1vcpu-1gb
    - Quantity: 1.0
    - Monthly Amount: 5.0
- Note: Always-on monthly price of the tested sizes; apps auto-pause when idle. Buckets are allocation-priced per quota and not included.

### Evidence Summary
- **Kind**: canary_run
  **Summary**: React Router pattern fixture deployed on Ample (react-router build then react-router-serve on the node-22 template); for this guide: a role-to-document access model with negative tests (401, 403) and an authorized private-bucket round-trip (private=ok).
  **Observed At**: 2026-09-20T03:31:44Z
  **Implementation Revision**: 03b6402b1b3e19178985f08ea4033804521d85d4-dirty (CLI b75e104)
  **Expires At**: 2027-03-19T03:31:44Z
  **Scope**:  
   - Checks: [/p/private-document-library]  
   - Template: node-22

### Last Verified At
2026-09-20T03:31:44Z

### Unknowns
- Region availability is unknown until a verified region fact is recorded
- Compliance attestations are unknown; none are claimed.

### Formats
- **HTML**: https://ample.computer/guides/react-router/private-file-access
- **Markdown**: https://ample.computer/guides/react-router/private-file-access.md
- **JSON**: https://api.ample.computer/v1/catalog/recipes/page%3Aguides%3Areact-router%3Aprivate-file-access

### Next Actions
1. **Action ID**: browse-catalog
   - **Label**: Browse the catalog index
   - **Operation ID**: catalog_index
   - **Method**: GET
   - **Relative Path**: /v1/catalog
   - **Requires Authentication**: false
   - **Requires Approval**: false

2. **Action ID**: search-recipes
   - **Label**: Search published recipes by intent, stack and constraints.
   - **Operation ID**: search_recipes
   - **Method**: POST
   - **Relative Path**: /v1/catalog/search
   - **Parameters**: {"body":{"limit":5,"query":"Enforce private-file authorization for React Router"}}
   - **Requires Authentication**: false
   - **Requires Approval**: false

3. **Action ID**: plan:page:guides:react-router:private-file-access
   - **Label**: Prepare a side-effect-free deployment plan for an authorized project
   - **Operation ID**: plan_deployment
   - **Method**: POST
   - **Relative Path**: /v1/catalog/plan
   - **Parameters**: {"body":{"inputs":{},"projectId":"","recipeId":"page:guides:react-router:private-file-access","recipeRevision":"r1"}}
   - **Requires Authentication**: true
   - **Requires Approval**: false

4. **Action ID**: auth-setup
   - **Label**: Read the existing agent authentication setup
   - **Operation ID**: existing_auth_setup
   - **Method**: GET
   - **Relative Path**: /mcp/setup
   - **Requires Authentication**: false
   - **Requires Approval**: false

5. **Action ID**: browse:stack:framework-react-router
   - **Label**: Browse React Router
   - **Operation ID**: browse_node
   - **Method**: GET
   - **Relative Path**: /v1/catalog/nodes/stack%3Aframework-react-router
   - **Parameters**: {"nodeId":"stack:framework-react-router"}
   - **Requires Authentication**: false
   - **Requires Approval**: false

6. **Action ID**: browse:intent:connect-app-to-storage
   - **Label**: Browse Connect app to storage
   - **Operation ID**: browse_node
   - **Method**: GET
   - **Relative Path**: /v1/catalog/nodes/intent%3Aconnect-app-to-storage
   - **Parameters**: {"nodeId":"intent:connect-app-to-storage"}
   - **Requires Authentication**: false
   - **Requires Approval**: false

7. **Action ID**: browse:pattern:private-document-library
   - **Label**: Browse Private document library
   - **Operation ID**: browse_node
   - **Method**: GET
   - **Relative Path**: /v1/catalog/nodes/pattern%3Aprivate-document-library
   - **Parameters**: {"nodeId":"pattern:private-document-library"}
   - **Requires Authentication**: false
   - **Requires Approval**: false