Migrate API URLs to data.cambeerfestival.app custom domain with relative URL support

[Copilot]

Replace Cloudflare worker default URLs (cbf-data-proxy.richard-alcock.workers.dev) with custom domain (data.cambeerfestival.app) to consolidate CORS configuration under app control. Implements relative URL support in festivals.json for improved portability.

Changes

Application code:

• lib/services/festival_service.dart - festivals registry endpoint, added relative URL resolution
• lib/models/festival.dart - default festival data URLs
• data/festivals.json - all festival configurations now use relative URLs (/cbf2025 instead of absolute URLs)

Tests:

• test/models_test.dart - URL validation tests
• test/services_test.dart - added test for relative URL resolution, updated all FestivalsResponse tests
• test/beer_provider_test.dart - updated provider tests
• test/main_test.dart - updated main tests
• test/brewery_screen_test.dart - updated screen tests
• test-e2e/screenshots.ts - E2E API base constant

Documentation:

• API reference docs (docs/api/)
• JSON schema $id fields
• docs/api/festival-registry-schema.json - documented relative URL support
• Network allowlist
• README examples

Key Features

Relative URL Support: festivals.json now uses relative paths (e.g., /cbf2025) instead of absolute URLs. The FestivalService automatically resolves these to absolute URLs based on where festivals.json was fetched from. This makes festivals.json portable across different domains without requiring modifications.

Benefits:

• Single source of truth for API base URL (determined by where festivals.json is served from)
• festivals.json can be served from any domain without modification
• Improved maintainability - no need to update URLs when changing domains

All 308 tests pass. No breaking changes to existing functionality.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Use data.cambeerfestival.app for festival and drinks data instead of the cloudflare provided url</issue_title>
<issue_description>We have configured a custom domain for the cloudflare workers for data.

This should be used instead of the current address.

Look for all places that need to be updated.

Use ./bin/mise to access flutter

Ask questions to clarify scope.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Use data.cambeerfestival.app for festival and drinks data instead of the cloudflare provided url #137

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[github-actions]

LCOV of commit 6a26a77 during Flutter App CI/CD #775

Summary coverage rate:
  lines......: 62.6% (1607 of 2568 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate:
                                       |Lines       |Functions  |Branches    
  Filename                             |Rate     Num|Rate    Num|Rate     Num
  ===========================================================================
  lib/models/festival.dart             | 0.0%    108|    -     0|    -      0
  lib/services/festival_service.dart   | 0.0%     36|    -     0|    -      0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[github-actions]

📸 App Screenshots

Visual preview of the app after your changes:

Screen	Preview (Mobile 390x844)
Drinks list

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_{Screenshots are automatically generated for PRs targeting main branch when app files change.}

[github-actions]

🚀 Cloudflare Pages Preview

Your preview deployment is ready!

Preview URL: https://copilot-update-data-source-u.staging-cambeerfestival.pages.dev

This preview will be automatically updated when you push new commits to this PR.

[richardthe3rd]

@copilot are there cors related updates we need to make. The screenshots and staging deployment show error loading drinks.

[Copilot]

@copilot are there cors related updates we need to make. The screenshots and staging deployment show error loading drinks.

The error is caused by a deployment sequencing issue:

1. The app code now points to data.cambeerfestival.app
2. But the worker at that domain is still serving the old festivals.json with URLs pointing to cbf-data-proxy.richard-alcock.workers.dev
3. This creates a URL mismatch

Solution: When this PR merges to main, the GitHub Actions workflow will automatically redeploy the Cloudflare Worker with the updated data/festivals.json (the workflow triggers on changes to this file). This will sync the worker's data with the app's expectations.

The staging/preview deployments are failing because they're fetching from the new domain before the worker has been updated with the new festivals.json data.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• data.cambeerfestival.app
  • Triggering command: /usr/bin/curl curl -i REDACTED (dns block)
• mise-versions.jdx.dev
  • Triggering command: /home/REDACTED/work/cambridge-beer-festival-app/cambridge-beer-festival-app/.mise/mise-2025.11.10 /home/REDACTED/work/cambridge-beer-festival-app/cambridge-beer-festival-app/.mise/mise-2025.11.10 run test (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[richardthe3rd]

@copilot should festivals.json have relative rather than absolute URLs? Would be more portable? App may need updating?

[Copilot]

@copilot should festivals.json have relative rather than absolute URLs? Would be more portable? App may need updating?

Good idea! Changed festivals.json to use relative URLs (/cbf2025 instead of absolute URLs). The app now resolves these relative to where festivals.json was fetched from, making it portable across different domains.

Changes in commit edbbbf4:

• festivals.json uses relative paths for data_base_url
• FestivalService resolves relative URLs to absolute at runtime
• All 308 tests updated and passing

This means festivals.json can be served from any domain without modification - the worker just needs to serve it, and the app will automatically construct the correct absolute URLs.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• mise-versions.jdx.dev
  • Triggering command: /home/REDACTED/work/cambridge-beer-festival-app/cambridge-beer-festival-app/.mise/mise-2025.11.10 /home/REDACTED/work/cambridge-beer-festival-app/cambridge-beer-festival-app/.mise/mise-2025.11.10 run test (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[github-actions]

🚀 Cloudflare Pages Preview

Your preview deployment is ready!

Preview URL: https://copilot-update-data-source-u.staging-cambeerfestival.pages.dev

This preview will be automatically updated when you push new commits to this PR.

[Copilot]

Pull request overview

This PR successfully migrates the Cambridge Beer Festival app from using the default Cloudflare worker URL (cbf-data-proxy.richard-alcock.workers.dev) to a custom domain (data.cambeerfestival.app), while introducing a flexible relative URL resolution mechanism for festival configurations. This change consolidates CORS configuration under app control and makes the festivals.json configuration file portable across different deployment environments.

Key Changes

• Custom domain migration: All API endpoints now use data.cambeerfestival.app instead of the Cloudflare worker default URL
• Relative URL support: Festival configurations in festivals.json now use relative paths (/cbf2025) that are automatically resolved based on where the registry is fetched from
• Enhanced portability: The festivals configuration can now be served from any domain without modification, as URLs are resolved dynamically at runtime

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
lib/services/festival_service.dart	Implements relative URL resolution logic in fromJson factory; extracts base URL from festivals endpoint; adds baseUrl field to FestivalsResponse
lib/models/festival.dart	Updates default festival dataBaseUrl values from old Cloudflare worker URL to new custom domain
data/festivals.json	Migrates all festival configurations from absolute URLs to relative paths (/cbf2025, /cbfw2025, /cbf2024)
test/services_test.dart	Adds baseUrl parameter to all fromJson calls; includes new test case verifying relative URL resolution behavior
test/models_test.dart	Updates URL expectations in festival tests to use new custom domain
test/main_test.dart	Adds baseUrl parameter to FestivalsResponse constructor in test setup
test/brewery_screen_test.dart	Adds baseUrl parameter to test festival response setup
test/beer_provider_test.dart	Updates all 10 test cases to include baseUrl parameter in FestivalsResponse constructors
test-e2e/screenshots.ts	Updates API_BASE_URL constant from old worker URL to custom domain
docs/api/festival-registry-schema.json	Updates $id to new domain; removes format: "uri" constraint; documents relative URL support with updated description and examples
docs/api/data-api-reference.md	Updates all API base URL references and example endpoints to use custom domain
docs/api/beer-list-schema.json	Updates schema $id to reference new custom domain
docs/api/README.md	Updates base URL references and code examples (JavaScript, Python) to use custom domain
docs/PLAY_STORE_METADATA.md	Updates API endpoint documentation from old worker URL to custom domain
docs/NETWORK_ALLOWLIST.md	Updates domain allowlist entries and example URLs to reference custom domain
docs/CLOUDFLARE_PAGES_SETUP.md	Updates worker deployment documentation and verification examples with new domain
docs/CICD.md	Updates worker URL references in CI/CD deployment documentation
cloudflare-worker/README.md	Updates example URL in code comments to use new custom domain pattern
README.md	Updates Data API section with new base URL and example endpoint
CLAUDE.md	Updates API details section with new base URL
.github/copilot-instructions.md	Updates API section base URL from old worker URL to custom domain