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https://github.com/worker-tools/router
A router for Worker Runtimes such and Cloudflare Workers or Service Workers.
https://github.com/worker-tools/router
cloudflare cloudflare-workers http router routing
Last synced: about 1 month ago
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A router for Worker Runtimes such and Cloudflare Workers or Service Workers.
- Host: GitHub
- URL: https://github.com/worker-tools/router
- Owner: worker-tools
- Created: 2021-01-01T04:50:21.000Z (almost 4 years ago)
- Default Branch: master
- Last Pushed: 2023-11-25T02:37:14.000Z (about 1 year ago)
- Last Synced: 2024-10-28T12:16:44.602Z (about 2 months ago)
- Topics: cloudflare, cloudflare-workers, http, router, routing
- Language: TypeScript
- Homepage: https://workers.tools/router
- Size: 69.3 KB
- Stars: 29
- Watchers: 2
- Forks: 4
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Worker Router
A router for [Worker Runtimes](https://workers.js.org) such as Cloudflare Workers and Service Workers.This router is inspired by previous work, specifically `tiny-request-router` and `itty-router`, but it
improves on them by providing better support for middleware, type inference, nested routing, and broader URL matching for use in service workers.## π Type Inference
The goal of Worker Router is to *infer types based on usage* so that **no explicit typing** is required for standard use cases.
This allows even JavaScript users to benefit from inline documentation and API discoverability. For example,```js
const router = new WorkersRouter()
.get('/about', basics(), (req, { userAgent }) => ok())
.get('/login', unsignedCookies(), (req, { cookies }) => ok())
```In this example your editor can infer the types and documentation for
- `userAgent`, provided by the `basics` middleware
- `cookies`, provided by the `unsignedCookies` middleware## π Functional Middleware
Worker Router [middlewares](https://workers.tools/middleware) are *just function* that add properties to a generic context object.
As such, they can be *mixed and matched* using standard tools from functional programming.For convenience, this module provides a `combine` utility to combine multiple middlewares into one.
```js
const myReusableMW = combine(
basics(),
signedCookies({ secret: 'password123' }),
cookieSession({ user: '' })
);const router = new WorkersRouter()
.get('/', myReusableMW, () => ok())
.post('/', combine(myReusableMW, bodyParser()), () => ok())
```Note that type inference is maintained when combining middleware!
## πͺ Nested Routing
Worker Router supports delegating entire sub routes to another router:```js
const itemRouter = new WorkerRouter()
.get('/', (req, { params }) => ok(`Matched "/item/`))
.get('/:id', (req, { params }) => ok(`Matched "/item/${params.id}`))const router = new WorkersRouter()
.get('/', () => ok('Main Page'))
.use('/item*', itemRouter)
```## βοΈ Ready for Service... Worker
Internally, this router uses [`URLPattern`](https://web.dev/urlpattern/) for routing, which allows it match URLs in the broadest sense.
For example, the following router, meant to be used in a Service Worker, can handle internal requests as well as intercept calls to external resources:```js
// file: "sw.js"
const router = new WorkersRouter()
.get('/', () => ok('Main Page'))
.get('/about', () => ok('About Page'))
.external('https://plausible.io/api/*', req => {
// intercepted
})
```## π₯ Error Handling Without Even Trying
Worker Router has first class support for error handling. Its main purpose is to let you write your handlers without having to wrap everything inside a massive `try {} catch` block. Instead, you can define special recover routes that get invoked when something goes wrong.```js
const router = new WorkersRouter()
.get('/', () => ok('Main Page'))
.get('/about', () => { throw Error('bang') })
.recover('*', (req, { error, response }) =>
new Response(`Something went wrong: ${error.message}`, response)
);
```## β Works with Workers
Worker Router comes with out of the box support for a variety of Worker Runtimes:To use it in an environment that provides a global `fetch` event, use
```js
self.addEventListener('fetch', router)
```(This works because the router implements the [`EventListener`](https://developer.mozilla.org/en-US/docs/Web/API/EventListener) interface)
To use it with Cloudflare's module workers, use
```js
export default router
```(This works because the router implements a `fetch` method with compatible interface)
To use it with Deno/Deploy's `serve` function, use
```js
serve(router.serveCallback)
```
--------
This module is part of the Worker Tools collection
β[Worker Tools](https://workers.tools) are a collection of TypeScript libraries for writing web servers in [Worker Runtimes](https://workers.js.org) such as Cloudflare Workers, Deno Deploy and Service Workers in the browser.
If you liked this module, you might also like:
- π§ [__Worker Router__][router] --- Complete routing solution that works across CF Workers, Deno and Service Workers
- π [__Worker Middleware__][middleware] --- A suite of standalone HTTP server-side middleware with TypeScript support
- π [__Worker HTML__][html] --- HTML templating and streaming response library
- π¦ [__Storage Area__][kv-storage] --- Key-value store abstraction across [Cloudflare KV][cloudflare-kv-storage], [Deno][deno-kv-storage] and browsers.
- π [__Response Creators__][response-creators] --- Factory functions for responses with pre-filled status and status text
- π [__Stream Response__][stream-response] --- Use async generators to build streaming responses for SSE, etc...
- π₯ [__JSON Fetch__][json-fetch] --- Drop-in replacements for Fetch API classes with first class support for JSON.
- π¦ [__JSON Stream__][json-stream] --- Streaming JSON parser/stingifier with first class support for web streams.Worker Tools also includes a number of polyfills that help bridge the gap between Worker Runtimes:
- βοΈ [__HTML Rewriter__][html-rewriter] --- Cloudflare's HTML Rewriter for use in Deno, browsers, etc...
- π [__Location Polyfill__][location-polyfill] --- A `Location` polyfill for Cloudflare Workers.
- π¦ [__Deno Fetch Event Adapter__][deno-fetch-event-adapter] --- Dispatches global `fetch` events using Denoβs native HTTP server.[router]: https://workers.tools/router
[middleware]: https://workers.tools/middleware
[html]: https://workers.tools/html
[kv-storage]: https://workers.tools/kv-storage
[cloudflare-kv-storage]: https://workers.tools/cloudflare-kv-storage
[deno-kv-storage]: https://workers.tools/deno-kv-storage
[kv-storage-polyfill]: https://workers.tools/kv-storage-polyfill
[response-creators]: https://workers.tools/response-creators
[stream-response]: https://workers.tools/stream-response
[json-fetch]: https://workers.tools/json-fetch
[json-stream]: https://workers.tools/json-stream
[request-cookie-store]: https://workers.tools/request-cookie-store
[extendable-promise]: https://workers.tools/extendable-promise
[html-rewriter]: https://workers.tools/html-rewriter
[location-polyfill]: https://workers.tools/location-polyfill
[deno-fetch-event-adapter]: https://workers.tools/deno-fetch-event-adapterFore more visit [workers.tools](https://workers.tools).