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Automated Web Asset Sync

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Automated Web Asset Sync

This document describes how cloudflare-schema.yaml stays in sync with Cloudflare API Shield and why this process must run automatically any time openapi.yaml changes.

Overview

docs/api/cloudflare-schema.yaml is the source of truth for Cloudflare API Shield Schema Validation. It is a filtered copy of docs/api/openapi.yaml with localhost servers and non-standard x-* extensions removed — exactly what Cloudflare’s parser expects.

When openapi.yaml changes (a new route is added, a parameter is modified, a response schema is updated), three things must happen:

  1. Regenerate cloudflare-schema.yaml from the updated openapi.yaml.
  2. Validate the updated openapi.yaml for correctness.
  3. Upload the new schema to Cloudflare API Shield so the live WAF reflects the current API shape.

Previously, only step 3 required a manual deno task schema:upload. There was no end-to-end task. The schema:sync task closes this gap.

Pipeline diagram

flowchart LR
    OA["openapi.yaml\n(source of truth)"] --> Sync["deno task schema:sync"]
    Sync --> Gen["generate-cloudflare-schema\n(filter localhost + x-*)"]
    Gen --> CF["cloudflare-schema.yaml"]
    CF --> Val["validate-openapi\n(structure + operationId uniqueness)"]
    Val --> Upload["upload-cloudflare-schema\n(Cloudflare API SDK)"]
    Upload --> Shield["Cloudflare API Shield\n(live schema validation)"]
    Val --> Postman["generate-postman-collection\n(collection + environment)"]

Tasks

TaskCommandWhat it does
schema:syncdeno task schema:syncFull pipeline: generate → validate → upload → Postman
schema:sync:drydeno task schema:sync:drySimulate all steps — no files written, no API calls
schema:sync:localdeno task schema:sync:localGenerate + validate + Postman only — no upload

When to run

  • After any change to docs/api/openapi.yaml — run deno task schema:sync to push the change live.
  • Locally, without uploading — run deno task schema:sync:local to regenerate cloudflare-schema.yaml and the Postman collection without touching the live API Shield schema.
  • Before a PR — deno task preflight already checks for schema drift; running schema:sync:local first satisfies that check.

Required environment variables (upload step only)

VariableDescriptionHow to set
CLOUDFLARE_ZONE_ID32-character hex zone ID from the Cloudflare dashboardShell env or CI secret
CLOUDFLARE_API_SHIELD_TOKENAPI token with API Gateway: Edit scope onlyShell env or CI secret

Never reuse CLOUDFLARE_API_TOKEN (the wrangler deploy token) for API Shield uploads — it has far broader permissions. Create a dedicated token scoped only to “API Gateway: Edit”.

Both variables are Zod-validated before any API call. Missing or malformed values cause an immediate exit with a clear diagnostic.

--skip-if-unchanged behaviour

By default schema:sync uses --skip-if-unchanged. The upload step:

  1. Computes the SHA-256 of cloudflare-schema.yaml.
  2. Lists all schemas currently registered in API Shield for the zone.
  3. Compares the hash against each schema’s source field.
  4. If a match is found and validation_enabled: true, exits 0 without uploading.
  5. If a match is found but validation_enabled: false, patches the existing schema to enable validation (no duplicate upload) and exits 0.
  6. If no match is found, performs the full zero-downtime upsert: upload → enable validation → delete old schema.

Pass --no-skip-if-unchanged to force upload regardless of hash.

Zero-downtime upsert sequence

When an upload is required, sync-api-assets.ts follows the same zero-downtime sequence as upload-cloudflare-schema.ts:

  1. Upload the new schema → get its schema_id.
  2. PATCH the new schema to enable validation.
  3. DELETE the previously-active schema.

This ensures there is no validation blackout — API Shield always has exactly one active schema.

Cloudflare API calls

All Cloudflare REST calls go through CloudflareApiService (src/services/cloudflareApiService.ts). No raw fetch('https://api.cloudflare.com/...') calls are made. The service wraps the official cloudflare@^5.2.0 SDK and Zod-validates every response.

See also