{"catalogRevision":"cat_f13ab9a494120b5e","recipeId":"page:recipes:appointment-booking:fastapi:attachments","recipeRevision":"r1","canonicalPath":"/recipes/appointment-booking/fastapi/attachments","label":"Host appointment booking with FastAPI: file attachments","family":"Workload recipe","summary":"Deploy a appointment booking built with FastAPI on Ample using the browser file uploads 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 FastAPI: content-type and size validation that rejects disallowed files, an object written to a private bucket and a row linking the record to the object key (reject=ok upload=ok linked=ok). Not separately tested: your upload UI, allowed types, size limits and virus scanning; treat the appointment booking-specific behavior as your application code.","representativeQueries":["Host appointment booking with FastAPI: file attachments","Where can I host Appointment booking built with FastAPI?","I need a restricted upload flow, file validation and record-to-object linkage."],"breadcrumbIds":["discovery","workload","workload:scheduling-and-data","workload:appointment-booking","page:recipes:appointment-booking:fastapi:attachments"],"breadcrumbs":[{"id":"discovery","label":"Agent hosting discovery","canonicalPath":"/discover/discovery","kind":"root"},{"id":"workload","label":"Applications and workloads","canonicalPath":"/discover/workload","kind":"facet"},{"id":"workload:scheduling-and-data","label":"Scheduling and data","canonicalPath":"/discover/workload/scheduling-and-data","kind":"group"},{"id":"workload:appointment-booking","label":"Appointment booking","canonicalPath":"/discover/workload/appointment-booking","kind":"atom"},{"id":"page:recipes:appointment-booking:fastapi:attachments","label":"Host appointment booking with FastAPI: file attachments","canonicalPath":"/recipes/appointment-booking/fastapi/attachments","kind":"recipe"}],"parentIds":["workload:appointment-booking","stack:framework-fastapi","pattern:browser-file-uploads","intent:deploy-web-app"],"parents":[{"id":"workload:appointment-booking","label":"Appointment booking","canonicalPath":"/discover/workload/appointment-booking","kind":"atom"},{"id":"stack:framework-fastapi","label":"FastAPI","canonicalPath":"/discover/stack/framework-fastapi","kind":"atom"},{"id":"pattern:browser-file-uploads","label":"Browser file uploads","canonicalPath":"/discover/pattern/browser-file-uploads","kind":"atom"},{"id":"intent:deploy-web-app","label":"Deploy web app","canonicalPath":"/discover/intent/deploy-web-app","kind":"atom"}],"resourceRequirements":["primitive:compute","primitive:postgres","primitive:s3-compatible-object-storage"],"infrastructureRequirements":[{"primitiveId":"primitive:compute","label":"Compute","canonicalPath":"/discover/primitive/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."},{"primitiveId":"primitive:postgres","label":"Postgres","canonicalPath":"/discover/primitive/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."},{"primitiveId":"primitive:s3-compatible-object-storage","label":"S3-compatible object storage","canonicalPath":"/discover/primitive/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."}],"framework":"FastAPI","workload":"Appointment booking","releaseStatus":"published","supportStatus":"verified","executionStatus":"ready","docsOnly":false,"prerequisites":["A FastAPI project that builds and starts with the documented commands (pip install into .ample/python from requirements.txt, then uvicorn from run.py reading PORT on the python-3.12 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"],"testedConfiguration":{"template":"python-3.12","runtime":"python","size":"s-1vcpu-1gb","install":"python3 -m pip install --target .ample/python -r requirements.txt","start":"PYTHONPATH=.ample/python:${PYTHONPATH:-} python3 run.py"},"inputSchema":{"additionalProperties":false,"properties":{"env":{"description":"Encrypted environment variables (bucket credentials, secrets)","items":{"pattern":"^[A-Z][A-Z0-9_]*=.*$","type":"string"},"maxItems":50,"type":"array"},"name":{"description":"App name","maxLength":63,"minLength":1,"pattern":"^[a-z0-9-]+$","type":"string"},"path":{"description":"Project directory or ample.toml service","maxLength":512,"minLength":1,"type":"string"},"release_command":{"description":"Migration command run before activation","maxLength":512,"type":"string"},"start":{"description":"Start command (Python apps pass one explicitly)","maxLength":512,"type":"string"}},"required":["env","name","path","start"],"type":"object"},"outputSchema":null,"workflowSteps":[{"title":"Build and start","body":"pip install into .ample/python from requirements.txt, then uvicorn from run.py reading PORT on the python-3.12 template. The server must bind 0.0.0.0 on PORT."},{"title":"Implement the pattern on PostgreSQL","body":"The fixture's module implements browser file uploads: content-type and size validation that rejects disallowed files, an object written to a private bucket and a row linking the record to the object key (reject=ok upload=ok linked=ok). Copy the approach into your schema; keep migrations idempotent and run them with --release-command."},{"title":"Wire object storage","body":"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."},{"title":"Deploy","body":"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.","command":"ample deploy . --name <app-name> --public --start \"python3 run.py\" --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=..."},{"title":"Verify","body":"Fetch the live URL and the pattern self-test route(s) (/p/browser-file-uploads) from the example; then run your own checks. On failure read `ample logs <deployment_id> --kind build` then `--kind runtime`.","command":"ample logs <deployment_id> --kind build"}],"examples":[{"title":"FastAPI pattern fixture","description":"Multi-pattern FastAPI app whose browser file uploads module was checked live; the module is under tests/deploy-canaries/_pattern-modules.","sourceRef":"tests/deploy-canaries/fastapi-patterns"}],"successChecks":[{"description":"app responds on its public URL","kind":"http_get","path":"/","expect":"ample canary fastapi patterns"},{"description":"browser-file-uploads self-test","kind":"http_get","path":"/p/browser-file-uploads","expect":"reject=ok upload=ok linked=ok"}],"limitations":["Verified on the python-3.12 template at s-1vcpu-1gb with the example fixture; other sizes, templates and FastAPI major versions are not verified.","The appointment booking itself (your upload UI, allowed types, size limits and virus scanning) 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.","PutObject and GetObject with path-style addressing are verified; multipart upload, listing, presigned URLs and lifecycle rules are not."],"costEstimate":{"currency":"USD","monthlyAmount":10.0,"authoritative":true,"basis":"size prices from pricing.toml (loaded by the API) at build revision 608d42bd07c66b96c7928a42e2fa2b0285b7285c","components":[{"name":"app server","size":"s-1vcpu-1gb","quantity":1.0,"monthlyAmount":5.0},{"name":"managed PostgreSQL database","size":"s-1vcpu-1gb","quantity":1.0,"monthlyAmount":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."},"evidenceSummary":[{"kind":"canary_run","summary":"FastAPI pattern fixture deployed on Ample (pip install into .ample/python from requirements.txt, then uvicorn from run.py reading PORT on the python-3.12 template); checks passed for browser-file-uploads and configuration-secrets. Pattern proof: content-type and size validation that rejects disallowed files, an object written to a private bucket and a row linking the record to the object key (reject=ok upload=ok linked=ok).","observedAt":"2026-09-21T01:14:18Z","implementationRevision":"50dbac567d2c5cc8e55e6c748a646be0025d9cfb (CLI 0.1.21)","expiresAt":"2027-03-20T01:14:18Z","scope":{"checks":["/p/browser-file-uploads"],"pattern":"pattern:browser-file-uploads","template":"python-3.12"}},{"kind":"canary_run","summary":"The same FastAPI app deployed with a --release-command migration; the marker it created was readable after activation.","observedAt":"2026-09-20T01:54:51Z","implementationRevision":"199ff1dfd52683832ae75d3f98b53a7a4bff7f96 (CLI e3181f5)","expiresAt":"2027-03-19T01:54:51Z","scope":{"pattern":"pattern:browser-file-uploads"}}],"lastVerifiedAt":"2026-09-21T01:14:18Z","mcpBinding":{"registryRef":"mcp:ample_deploy","toolName":"ample_deploy","schemaHash":"876465fce906da0c224d62961d3343064108ebe30af80cf1b87094974e948853","observedAt":"2026-09-22T00:31:22.774679+00:00","implementationRevision":"e6446ceea69b","requiredScopes":["servers:write","databases:read","buckets:read"],"bindingState":"current"},"unknowns":["region availability is unknown until a verified region fact is recorded","compliance attestations are unknown; none are claimed"],"formats":{"html":"https://ample.computer/recipes/appointment-booking/fastapi/attachments","markdown":"https://ample.computer/recipes/appointment-booking/fastapi/attachments.md","json":"https://api.ample.computer/v1/catalog/recipes/page%3Arecipes%3Aappointment-booking%3Afastapi%3Aattachments"},"nextActions":[{"actionId":"browse-catalog","label":"Browse the catalog index","operationId":"catalog_index","method":"GET","relativePath":"/v1/catalog","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"search-recipes","label":"Search published recipes by intent, stack and constraints","operationId":"search_recipes","method":"POST","relativePath":"/v1/catalog/search","origin":"api","parameters":{"body":{"limit":5,"query":"Host appointment booking with FastAPI: file attachments"}},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"plan:page:recipes:appointment-booking:fastapi:attachments","label":"Prepare a side-effect-free deployment plan for an authorized project","operationId":"plan_deployment","method":"POST","relativePath":"/v1/catalog/plan","origin":"api","parameters":{"body":{"inputs":{},"projectId":"<workspace or server id you own>","recipeId":"page:recipes:appointment-booking:fastapi:attachments","recipeRevision":"r1"}},"requiresAuthentication":true,"requiresApproval":false},{"actionId":"auth-setup","label":"Read the existing agent authentication setup","operationId":"existing_auth_setup","method":"GET","relativePath":"/mcp/setup","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:workload:appointment-booking","label":"Browse Appointment booking","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/workload%3Aappointment-booking","origin":"api","parameters":{"nodeId":"workload:appointment-booking"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:stack:framework-fastapi","label":"Browse FastAPI","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/stack%3Aframework-fastapi","origin":"api","parameters":{"nodeId":"stack:framework-fastapi"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:pattern:browser-file-uploads","label":"Browse Browser file uploads","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/pattern%3Abrowser-file-uploads","origin":"api","parameters":{"nodeId":"pattern:browser-file-uploads"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:intent:deploy-web-app","label":"Browse Deploy web app","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/intent%3Adeploy-web-app","origin":"api","parameters":{"nodeId":"intent:deploy-web-app"},"requiresAuthentication":false,"requiresApproval":false}]}