tsndr/cloudflare-worker-router
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switch to return syntax

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This commit is contained in:
Toby
2022-11-24 22:55:26 +01:00
parent ad4557ecb3
commit 215a3731da
3 changed files with 156 additions and 226 deletions
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130
README.md
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@@ -40,8 +40,9 @@ export interface Env {
//
// Example binding to R2. Learn more at https://developers.cloudflare.com/workers/runtime-apis/r2/
// MY_BUCKET: R2Bucket
}
SECRET_TOKEN: string
}
// Initialize router
const router = new Router<Env>()
@@ -50,61 +51,61 @@ const router = new Router<Env>()
router.cors()
// Register global middleware
router.use(({ req, res, next }) => {
res.headers.set('X-Global-Middlewares', 'true')
next()
router.use(() => {
return new Response(null, {
headers: {
'X-Global-Middlewares': 'true'
}
})
})
// Simple get
router.get('/user', ({ req, res }) => {
res.body = {
data: {
router.get('/user', () => {
return Response.json({
id: 1,
name: 'John Doe'
}
}
})
})
// Post route with url parameter
router.post('/user/:id', ({ req, res }) => {
router.post('/user/:id', ({ req }) => {
const userId = req.params.id
// Do stuff...
// Do stuff
if (errorDoingStuff) {
res.status = 400
res.body = {
error: 'User did stupid stuff!'
}
return
if (!true) {
return Response.json({
error: 'Error doing stuff!'
}, { status: 400 })
}
res.status = 204
return Response.json({ userId }, { status: 204 })
})
// Delete route using a middleware
router.delete('/user/:id', ({ req, res, next }) => {
router.delete('/user/:id', ({ env, req }) => {
const { SECRET_TOKEN } = env
if (!apiTokenIsCorrect) {
res.status = 401
return
}
if (req.headers.get('Authorization') === SECRET_TOKEN)
return new Response(null, { status: 401 })
await next()
}, (req, res) => {
}, ({ req }) => {
const userId = req.params.id
// Do stuff...
return Response.json({ userId })
})
// Listen Cloudflare Workers Fetch Event
export default {
async fetch(request: Request, env: Env): Promise<Response> {
return router.handle(env, request)
async fetch(request: Request, env: Env, ctx: ExecutionContext) {
return router.handle(request, env, ctx)
}
}
```
<details>
@@ -120,59 +121,56 @@ const router = new Router()
router.cors()
// Register global middleware
router.use(({ req, res, next }) => {
res.headers.set('X-Global-Middlewares', 'true')
next()
router.use(() => {
return new Response(null, {
headers: {
'X-Global-Middlewares': 'true'
}
})
})
// Simple get
router.get('/user', ({ req, res }) => {
res.body = {
data: {
router.get('/user', () => {
return Response.json({
id: 1,
name: 'John Doe'
}
}
})
})
// Post route with url parameter
router.post('/user/:id', ({ req, res }) => {
router.post('/user/:id', ({ req }) => {
const userId = req.params.id
// Do stuff...
// Do stuff
if (errorDoingStuff) {
res.status = 400
res.body = {
error: 'User did stupid stuff!'
}
return
return Response.json({
error: 'Error doing stuff!'
}, { status: 400 })
}
res.status = 204
return Response.json({ userId }, { status: 204 })
})
// Delete route using a middleware
router.delete('/user/:id', ({ req, res, next }) => {
router.delete('/user/:id', ({ env, req }) => {
const { SECRET_TOKEN } = env
if (!apiTokenIsCorrect) {
res.status = 401
return
}
await next()
}, (req, res) => {
if (req.headers.get('Authorization') === SECRET_TOKEN)
return new Response(null, { status: 401 })
}, ({ req }) => {
const userId = req.params.id
// Do stuff...
return Response.json({ userId })
})
// Listen Cloudflare Workers Fetch Event
export default {
async fetch(request, env) {
return router.handle(env, request)
async fetch(request, env, ctx) {
return router.handle(request, env, ctx)
}
}
```
@@ -206,7 +204,7 @@ Handler is a `function` which will be called for every request.
#### `ctx`
Object containing `env`, [`req`](#req-object), [`res`](#res-object), `next`
Object containing `env`, [`req`](#req-object)
### `router.cors([config])`
@@ -247,16 +245,16 @@ Supports the use of dynamic parameters, prefixed with a `:` (i.e. `/user/:userId
#### `handlers` (function, optional)
An unlimited number of functions getting [`req`](#req-object) and [`res`](#res-object) passed into them.
An unlimited number of functions getting [`ctx`](#ctx-object) passed into them.
### `ctx`-Object
Key | Type | Description
--------- | ------------------- | -----------
`env` | `object` | Environment
`req` | `req`-Object | Request Object
`res` | `res`-Object | Response Object
`next` | `next`-Handler | Next Handler
`ctx` | `ctx`-Object | Cloudflare's `ctx`-Object
### `req`-Object
@@ -270,16 +268,6 @@ Key | Type | Description
`query` | `object` | Object containing all query parameters
### `res`-Object
Key | Type | Description
----------- | ------------------- | -----------
`body` | `object` / `string` | Either set an `object` (will be converted to JSON) or a string
`headers` | `Headers` | Response [Headers Object](https://developer.mozilla.org/en-US/docs/Web/API/Headers)
`status` | `integer` | Return status code (default: `204`)
`webSocket` | `WebSocket` | Upgraded websocket connection
## Setup
Please follow Cloudflare's [Get started guide](https://developers.cloudflare.com/workers/get-started/guide/) to install wrangler.
@@ -335,8 +323,8 @@ const router = new Router<Env>()
// TODO: add your routes here
export default {
async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
return router.handle(env, request)
async fetch(request: Request, env: Env, ctx: ExecutionContext) {
return router.handle(request, env, ctx)
}
}
```
@@ -360,7 +348,7 @@ const router = new Router()
export default {
async fetch(request, env, ctx) {
return router.handle(env, request)
return router.handle(request, env, ctx)
}
}
```

133
src/index.ts
View File

@@ -18,14 +18,12 @@ export interface Route<TEnv> {
* @typedef RouterContext
* @property {RouterEnv} env Environment
* @property {RouterRequest} req Request Object
* @property {RouterResponse} res Response Object
* @property {RouterNext} next Next Handler
* @property {ExecutionContext} ctx Context Object
*/
export interface RouterContext<TEnv> {
export interface RouterContext<TEnv = any> {
env: TEnv
req: RouterRequest
res: RouterResponse
next: RouterNext
ctx: ExecutionContext
}
/**
@@ -69,42 +67,15 @@ export interface RouterRequestQuery {
[key: string]: string
}
/**
* Response Object
*
* @typedef RouterResponse
* @property {Headers} headers Response headers object
* @property {number} [status=204] Return status code (default: `204`)
* @property {string | any} [body] Either an `object` (will be converted to JSON) or a string
* @property {Response} [raw] A response object that is to be returned, this will void all other res properties and return this as is.
*/
export interface RouterResponse {
headers: Headers
status?: number
body?: string | any
raw?: Response,
webSocket?: WebSocket
}
/**
* Next Function
*
* @callback RouterNext
* @returns {Promise<void>}
*/
export interface RouterNext {
(): Promise<void>
}
/**
* Handler Function
*
* @callback RouterHandler
* @param {RouterContext} ctx
* @returns {Promise<void> | void}
* @returns {Promise<Response | void> Response | void}
*/
export interface RouterHandler<TEnv = any> {
(ctx: RouterContext<TEnv>): Promise<void> | void
(ctx: RouterContext<TEnv>): Promise<Response | void> | Response | void
}
/**
@@ -325,6 +296,18 @@ export class Router<TEnv = any> {
return this
}
private setCorsHeaders(headers: Headers = new Headers()): Headers {
if (this.corsConfig.allowOrigin && !headers.has('Access-Control-Allow-Origin'))
headers.set('Access-Control-Allow-Origin', this.corsConfig.allowOrigin)
if (this.corsConfig.allowMethods && !headers.has('Access-Control-Allow-Methods'))
headers.set('Access-Control-Allow-Methods', this.corsConfig.allowMethods)
if (this.corsConfig.allowHeaders && !headers.has('Access-Control-Allow-Headers'))
headers.set('Access-Control-Allow-Headers', this.corsConfig.allowHeaders)
if (this.corsConfig.maxAge && !headers.has('Access-Control-Max-Age'))
headers.set('Access-Control-Max-Age', this.corsConfig.maxAge.toString())
return headers
}
/**
* Register route
*
@@ -393,8 +376,7 @@ export class Router<TEnv = any> {
* @param {any} [extend]
* @returns {Promise<Response>}
*/
public async handle(env: TEnv, request: Request, extend: any = {}): Promise<Response> {
try {
public async handle(request: Request, env: TEnv, ctx: ExecutionContext, extend: any = {}): Promise<Response> {
const req: RouterRequest = {
...extend,
method: request.method,
@@ -406,76 +388,37 @@ export class Router<TEnv = any> {
body: ''
}
const headers = new Headers()
const route = this.getRoute(req)
if (this.corsEnabled) {
if (this.corsConfig.allowOrigin)
headers.set('Access-Control-Allow-Origin', this.corsConfig.allowOrigin)
if (this.corsConfig.allowMethods)
headers.set('Access-Control-Allow-Methods', this.corsConfig.allowMethods)
if (this.corsConfig.allowHeaders)
headers.set('Access-Control-Allow-Headers', this.corsConfig.allowHeaders)
if (this.corsConfig.maxAge)
headers.set('Access-Control-Max-Age', this.corsConfig.maxAge.toString())
if (!route && req.method === 'OPTIONS') {
return new Response(null, {
headers,
status: this.corsConfig.optionsSuccessStatus
})
}
}
if (!route)
return new Response(this.debugMode ? 'Route not found!' : null, { status: 404 })
if (['POST', 'PUT', 'PATCH'].includes(req.method)) {
if (req.headers.has('Content-Type') && req.headers.get('Content-Type')!.includes('json')) {
try {
req.body = await request.json()
} catch {
req.body = {}
}
} else {
try {
req.body = await request.text()
} catch {
req.body = ''
}
}
if (this.corsEnabled && req.method === 'OPTIONS') {
return new Response(null, {
headers: this.setCorsHeaders(),
status: this.corsConfig.optionsSuccessStatus
})
}
const res: RouterResponse = { headers }
const handlers = [...this.globalHandlers, ...route.handlers]
let prevIndex = -1
const runner = async (index: number) => {
if (index === prevIndex)
throw new Error('next() called multiple times')
let response: Response | undefined
prevIndex = index
for (const handler of handlers) {
const res = await handler({ env, req, ctx })
if (typeof handlers[index] === 'function')
await handlers[index]({ env, req, res, next: async () => await runner(index + 1) })
}
await runner(0)
if (typeof res.body === 'object') {
if (!res.headers.has('Content-Type'))
res.headers.set('Content-Type', 'application/json')
res.body = JSON.stringify(res.body)
}
if (res.raw)
return res.raw
return new Response([101, 204, 205, 304].includes(res.status || (res.body ? 200 : 204)) ? null : res.body, { status: res.status, headers: res.headers, webSocket: res.webSocket || null })
} catch(err) {
console.error(err)
return new Response(this.debugMode && err instanceof Error ? err.stack : '', { status: 500 })
if (res) {
response = res
break
}
}
if (!response)
return new Response(this.debugMode ? 'Handler did not return a Response!' : null, { status: 404 })
if (this.corsEnabled)
this.setCorsHeaders(response.headers)
return response
}
}

1
tsconfig.json
View File

@@ -15,7 +15,6 @@
"alwaysStrict": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"noImplicitReturns": true,
"noFallthroughCasesInSwitch": true,
"esModuleInterop": true,
"preserveConstEnums": true,