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## Description: This reworks asset delivery and cacheability across the app and moves non-bundled public resources onto immutable, content-hashed URLs. Vite bundle outputs continue to live under `/assets/**` and remain content-hashed by Vite. Public resources that were previously fetched from stable paths in `resources/` now go through a custom hashed namespace under `/_assets/**`, backed by a generated asset manifest that is available to the server, browser, and worker runtime. In parallel, the root app shell is now cacheable shared HTML instead of request-time `no-store` HTML. Dynamic and live routes remain explicitly uncached. ## Why - Improve browser and Cloudflare cacheability for static assets. - Remove query-string and release-version cache busting for runtime-fetched assets. - Allow unchanged public assets to keep the same URL across releases. - Reduce avoidable work on `/` by serving a shared app shell instead of rendering HTML on every request. - Make cache behavior explicit instead of relying on mixed framework defaults and file-extension heuristics. ## What Changed ### 1. Content-hashed public asset pipeline - Added a build-time public asset manifest and hashing pipeline for non-Vite resources. - Production now emits hashed public assets under `/_assets/**`. - Added runtime manifest loading for Node so server-rendered paths resolve against built hashed files instead of rebuilding from source at runtime. - Emitted the runtime asset manifest as an ESM module for server consumption. Result: - `/assets/**` = Vite-managed hashed bundle outputs - `/_assets/**` = custom content-hashed public resources ### 2. Runtime asset URL migration - Added a shared `assetUrl(...)` resolution path. - Migrated runtime references away from query-string versioning and stable source paths. - Updated browser, worker, and server-side rendering paths to resolve through the asset manifest. - Moved map manifests, map binaries, thumbnails, sprites, sounds, fonts, flags, icons, screenshots, and other runtime-fetched resources onto hashed URLs. ### 3. Map and preview fixes - Fixed directory and per-file map asset resolution so map manifest and binary fetches resolve to the correct hashed URLs. - Updated preview metadata and map thumbnail paths to use the hashed asset namespace. - Fixed runtime manifest loading in prod after deployment. ### 4. Explicit cache policies - Added explicit immutable cache headers for: - `/assets/**` - `/_assets/**` - worker-prefixed equivalents under `/wN/...` - Added explicit `no-store` headers for live and dynamic APIs. - Removed the old `/api/env` bootstrap request and baked `gameEnv` into the HTML bootstrap instead. ### 5. Cacheable root app shell - Refactored the root HTML path to serve a shared app shell with: - `Cache-Control: public, max-age=0, s-maxage=300, stale-while-revalidate=86400` - `/` and the SPA fallback now serve shared cacheable HTML instead of request-time `no-store` rendering. - `/game/:id` remains dynamic and `no-store`, but now reuses the shared shell before injecting preview tags. ### 6. Matchmaking instance handling - Because the app shell is now cacheable, `INSTANCE_ID` was removed from shared HTML. - Added `/api/instance` as a temporary `no-store` runtime lookup used only by matchmaking. - This preserves correctness with the current random-per-boot `INSTANCE_ID` model while keeping `/` cacheable, but it is not the intended long-term design. ## Behavior Changes ### Asset URL contract Production URLs for non-Vite public resources now change from stable paths such as: - `/maps/...` - `/images/...` - `/manifest.json` to content-hashed paths under: - `/_assets/...` Examples: - `/_assets/maps/<map>/manifest.<hash>.json` - `/_assets/images/Favicon.<hash>.svg` ### Bootstrap/config - `/api/env` is removed. - `gameEnv` is now bootstrapped from HTML. ### HTML caching - `/` and the SPA fallback are now cacheable shared HTML. - `/game/:id` remains dynamic. ## Cache Matrix After This Branch - `/_assets/**`: `public, max-age=31536000, immutable` - `/assets/**`: `public, max-age=31536000, immutable` - live `/api/**`: explicit `no-store` - `/api/health`: explicit `no-store` - `/api/instance`: explicit `no-store` - `/game/:id`: explicit `no-store` - `/` and SPA fallback: `public, max-age=0, s-maxage=300, stale-while-revalidate=86400` ## Notes / Tradeoffs - `/api/instance` is a temporary compromise. It exists because `INSTANCE_ID` is currently random per boot, which is not safe to embed into cacheable shared HTML. - The current matchmaking flow still asks the client to provide `instance_id` during `matchmaking/join`. That is functional, but it is the wrong ownership boundary: instance selection should be handled by the matchmaking service, not by the browser. - The cleaner end-state would be: - make `matchmaking/join` stop requiring `instance_id` from the client, and let the matchmaking service select a healthy instance from worker check-ins - This branch makes the origin behavior edge-cache-friendly, but Cloudflare still needs matching cache rules if HTML itself should be cached at the edge. ## Validation Verified during development with: - `npx tsc --noEmit` - `node node_modules\\vite\\bin\\vite.js build` - `node node_modules\\vitest\\vitest.mjs run tests/server/RenderHtml.test.ts tests/server/NoStoreHeaders.test.ts tests/server/StaticAssetCache.test.ts tests/core/configuration/ConfigLoader.test.ts` Additional targeted tests added: - `tests/AssetUrls.test.ts` - `tests/core/game/FetchGameMapLoader.test.ts` - `tests/core/configuration/ConfigLoader.test.ts` - `tests/server/NoStoreHeaders.test.ts` - `tests/server/StaticAssetCache.test.ts` - `tests/server/RenderHtml.test.ts` ## Known Existing Warnings The production build still reports pre-existing warnings that are not addressed by this branch: - inconsistent JSON import attributes for `resources/countries.json` - inconsistent JSON import attributes for `resources/QuickChat.json` - large chunk warnings from Vite ## Rollout Notes - Cache rules should treat `/_assets/**` and `/assets/**` as immutable. - Cloudflare will still classify HTML as dynamic after deploy unless matching edge cache rules are configured for it. ## Follow-ups - Remove `/api/instance` by changing `matchmaking/join` so the server selects the target instance, or by making `INSTANCE_ID` deploy-stable if the current contract must remain. ## Please complete the following: - [ ] I have added screenshots for all UI updates - [ ] I process any text displayed to the user through translateText() and I've added it to the en.json file - [ ] I have added relevant tests to the test directory - [ ] I confirm I have thoroughly tested these changes and take full responsibility for any bugs introduced ## Please put your Discord username so you can be contacted if a bug or regression is found: DISCORD_USERNAME
OpenFront.io is an online real-time strategy game focused on territorial control and alliance building. Players compete to expand their territory, build structures, and form strategic alliances in various maps based on real-world geography.
This is a fork/rewrite of WarFront.io. Credit to https://github.com/WarFrontIO.
License
OpenFront source code is licensed under the GNU Affero General Public License v3.0
Current copyright notices appear in:
- Footer: "© OpenFront and Contributors"
- Loading screen: "© OpenFront and Contributors"
Modified versions must preserve these notices in reasonably visible locations.
See the LICENSE for complete requirements.
For asset licensing, see LICENSE-ASSETS.
For license history, see LICENSING.md.
🌟 Features
- Real-time Strategy Gameplay: Expand your territory and engage in strategic battles
- Alliance System: Form alliances with other players for mutual defense
- Multiple Maps: Play across various geographical regions including Europe, Asia, Africa, and more
- Resource Management: Balance your expansion with defensive capabilities
- Cross-platform: Play in any modern web browser
📋 Prerequisites
- npm (v10.9.2 or higher)
- A modern web browser (Chrome, Firefox, Edge, etc.)
🚀 Installation
-
Clone the repository
git clone https://github.com/openfrontio/OpenFrontIO.git cd OpenFrontIO -
Install dependencies
npm run instDo NOT use
npm installnornpm ibut instead use ournpm run inst. It runs the safernpm ci --ignore-scriptsto install dependencies exactly according to the versions inpackage-lock.jsonand doesn't run scripts. This can prevent being hit by a supply chain attack.
🎮 Running the Game
Development Mode
Run both the client and server in development mode with live reloading:
npm run dev
This will:
- Start the webpack dev server for the client
- Launch the game server with development settings
- Open the game in your default browser (to disable this behavior, set
SKIP_BROWSER_OPEN=truein your environment)
Client Only
To run just the client with hot reloading:
npm run start:client
Server Only
To run just the server with development settings:
npm run start:server-dev
Connecting to staging or production backends
Sometimes it's useful to connect to production servers when replaying a game, testing user profiles, purchases, or login flow.
To replay a production game, make sure you're on the same commit that the game you want to replay was executed on, you can find the
gitCommitvalue viahttps://api.openfront.io/game/[gameId]. Unfinished games cannot be replayed on localhost.
To connect to staging api servers:
npm run dev:staging
To connect to production api servers:
npm run dev:prod
🛠️ Development Tools
-
Format code:
npm run format -
Lint code:
npm run lint -
Lint and fix code:
npm run lint:fix -
Testing
npm test
🏗️ Project Structure
/src/client- Frontend game client/src/core- Shared game logic/src/server- Backend game server/resources- Static assets (images, maps, etc.)
🤝 Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
- Request to join the development Discord.
- Fork the repository
- Create your feature branch (
git checkout -b amazing-feature) - Commit your changes (
git commit -m 'Add some amazing feature') - Push to the branch (
git push origin amazing-feature) - Open a Pull Request
🌐 Translation
Translators are welcome! Please feel free to help translate into your language. How to help?
- Join the translation Discord
- Go to the project's Crowdin translation page: https://crowdin.com/project/openfront-mls
- Login if you already have an account / Sign up if you don't have one
- Join the project
- Select the language you want to translate in. If your language isn't on the list, click the "Request New Language" button and enter the language you want added there.
- Translate the strings
Feel free to ask questions in the translation Discord server!
Project Governance
- The project maintainer (evan) has final authority on all code changes and design decisions
- All pull requests require maintainer approval before merging
- The maintainer reserves the right to reject contributions that don't align with the project's vision or quality standards
Contribution Path for New Contributors
To ensure code quality and project stability, we use a progressive contribution system:
-
New Contributors: Limited to UI improvements and small bug fixes only
- This helps you become familiar with the codebase
- UI changes are easier to review and less likely to break core functionality
- Small, focused PRs have a higher chance of being accepted
-
Established Contributors: After several successful PRs and demonstrating understanding of the codebase, you may work on more complex features
-
Core Contributors: Only those with extensive experience with the project may modify critical game systems
How to Contribute Successfully
-
Before Starting Work:
- Open an issue describing what you want to contribute
- Wait for maintainer feedback before investing significant time
- Small improvements can proceed directly to PR stage
-
Code Quality Requirements:
- All code must be well-commented and follow existing style patterns
- New features should not break existing functionality
- Code should be thoroughly tested before submission
- All code changes in src/core MUST be tested.
-
Pull Request Process:
- Keep PRs focused on a single feature or bug fix
- Include screenshots for UI changes
- Describe what testing you've performed
- Be responsive to feedback and requested changes
-
Testing Requirements:
- Verify your changes work as expected
- Test on multiple systems/browsers if applicable
- Document your testing process in the PR
Communication
- Be respectful and constructive in all project interactions
- Questions are welcome, but please search existing issues first
- For major changes, discuss in an issue before starting work
Final Notes
Remember that maintaining this project requires significant effort. The maintainer appreciates your contributions but must prioritize long-term project health and stability. Not all contributions will be accepted, and that's okay.
Thank you for helping make OpenFront better!