# Host csv import tool with SvelteKit: data exports

Deploy a csv import tool built with SvelteKit on Ample using the generated downloads pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL, a private S3-compatible bucket holds objects with credentials delivered as encrypted environment variables. Verified on SvelteKit: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). Not separately tested: your export formats, retention policy and entitlement model; treat the csv import tool-specific behavior as your application code.

## Representative Queries
- Host csv import tool with SvelteKit: data exports
- Where can I host CSV import tool built with SvelteKit?
- I need a scoped export format, artifact generation and authorized download procedure.

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

## Infrastructure Requirements
### 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.

### 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.

### 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 SvelteKit project that builds and starts with the documented commands (vite build with @sveltejs/adapter-node then node build on the node-22 template)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- A bucket from `ample bucket create` with its credentials passed as encrypted S3_* environment variables
- An Ample account token with servers:write, databases:read, buckets:read

## Workflow Steps
1. **Build and start**  
   vite build with @sveltejs/adapter-node then node build on the node-22 template. The server must bind 0.0.0.0 on PORT.

2. **Implement the pattern on PostgreSQL**  
   The fixture's module implements generated downloads: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). Copy the approach into your schema; keep migrations idempotent and run them with --release-command.

3. **Wire object storage**  
   Create the bucket(s), then pass endpoint, region, bucket and keys as --env values. Use path-style addressing. Keep private data in an unpublished bucket.

4. **Deploy**  
   Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op.
   ```
   ample deploy . --name  --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...  
   ```

5. **Verify**  
   Fetch the live URL and the pattern self-test route(s) (/p/generated-downloads) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`.
   ```
   ample logs  --kind build  
   ```

## Cost Estimate
- Currency: USD  
- Monthly Amount: 10.0  
- Components:
  - App server: s-1vcpu-1gb, quantity: 1.0, monthly amount: 5.0
  - Managed PostgreSQL database: s-1vcpu-1gb, quantity: 1.0, monthly amount: 5.0

**Note:** Always-on monthly price of the tested sizes; apps and databases auto-pause when idle. Buckets are allocation-priced per quota and not included.

## Limitations
- Verified on the node-22 template at s-1vcpu-1gb with the example fixture; other sizes, templates and SvelteKit major versions are not verified.
- The csv import tool itself (your export formats, retention policy and entitlement model) is application code and was not separately tested; the pattern checks are what was verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.
- Apps auto-pause when idle and wake on the next request; always-on is an operator setting, not a plan feature.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified; apps and their databases are placed together.

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

2. **Generated-downloads self-test**  
   - Kind: http_get  
   - Path: /p/generated-downloads  
   - Expect: export=ok rows=3 (with ?token=...; 401 without)

## Examples
- **SvelteKit pattern fixture**  
  Multi-pattern SvelteKit app whose generated downloads module was checked live; the module is under tests/deploy-canaries/_pattern-modules.
  - Source Ref: tests/deploy-canaries/sveltekit-patterns

## Evidence Summary
1. **Canary Run**  
   - Summary: SvelteKit pattern fixture deployed on Ample (vite build with @sveltejs/adapter-node then node build on the node-22 template); checks passed for generated-downloads and configuration-secrets.
   - Observed At: 2026-09-20T03:31:44Z
   - Implementation Revision: 03b6402b1b3e19178985f08ea4033804521d85d4-dirty (CLI b75e104)
   - Expires At: 2027-03-19T03:31:44Z

2. **Canary Run**  
   - Summary: The same SvelteKit app deployed with a --release-command migration; the marker it created was readable after activation.
   - Observed At: 2026-09-20T02:16:51Z
   - Implementation Revision: 199ff1dfd52683832ae75d3f98b53a7a4bff7f96-dirty (CLI e3181f5)
   - Expires At: 2027-03-19T02:16:51Z

## 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**  
5. **Browse CSV import tool**  
6. **Browse SvelteKit**  
7. **Browse Generated downloads**  
8. **Browse Deploy web app**

---

For further details, visit [HTML Documentation](/content/recipes/csv-import-tool/sveltekit/data-exports/index.html) or [Markdown Documentation](/content/recipes/csv-import-tool/sveltekit/data-exports.md).