@iopa/router
v4.0.19
Published
Lightweight and fast router for IOPA applications
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@iopa/router
About
@iopa/router is lightweight and fast router for the IOPA framework
It routes HTTP, COAP and MQTT requests, with simple uri templates and parameter/query string parsing.
Usage
Installation:
npm install @iopa/routerHello World
import type { IContextIopa, IRouterApp, Next} from '@iopa/types'
import { RouterApp } from 'iopa'
import { RouterMiddleware } from '@iopa/router'
const app: IRouterApp = new RouterApp()
app
.use(FlipperMiddleware, 'Flipper Middleware')
.use(RouterMiddleware, 'Router Middleware')
.get('/hello', async function (context: IContextIopa, next: Next) {
return context.response.html('<HTML><HEAD></HEAD><BODY>Hello World</BODY>')
})
.get('/goodbye', async function (context: IContextIopa, next: Next) {
return context.response.html('<HTML><HEAD></HEAD><BODY>Goodbye World</BODY>')
})Methods
app.get: Match methodGETrequestsapp.post: Match methodPOSTrequestsapp.put: Match methodPUTrequestsapp.head: Match methodHEADrequestsapp.del: Matchmethod DELETErequestsapp.options: Match methodOPTIONSrequestsapp.all: Match all above request methods
API
If you want to grab a part of the path you can use capture groups in the pattern:
route.get('/id/:customer', function(context) {
var customer = context.params.customer; // ex: if the path is /id/bar, then customer = barQuery paramaters in the url are also added to context.params:
route.get('/id/:customer', function(context) {
var base = context.params.base // ex: if the path is /id/bar?name=dog, then customer = bar
var name = context.params.name // ex: if the path is /id/bar?name=dog, then name = dog
})Routing
Basic
// HTTP Methods
app.get('/', (c) => c.response.text('GET /'))
app.post('/', (c) => c.response.text('POST /'))
app.put('/', (c) => c.response.text('PUT /'))
app.delete('/', (c) => c.response.text('DELETE /'))
// Wildcard
app.get('/wild/*/card', (c) => {
return c.response.text('GET /wild/*/card')
})
// Any HTTP methods
app.all('/hello', (c) => c.response.text('Any Method /hello'))Named Parameter
app.get('/user/:name', (c) => {
const name = c.param('name')
...
})or all parameters at once:
app.get('/posts/:id/comment/:comment_id', (c) => {
const { id, comment_id } = c.param()
...
})Regexp
app.get('/post/:date{[0-9]+}/:title{[a-z]+}', (c) => {
const { date, title } = c.req.param()
...
})Chained route
app
.get('/endpoint', (c) => {
return c.response.text('GET /endpoint')
})
.post((c) => {
return c.response.text('POST /endpoint')
})
.delete((c) => {
return c.response.text('DELETE /endpoint')
})Not Found Handler (use default App in IOPA)
function NotFound(context: IContextIopa): HandlerResult {
return context.respondWith({msg: 'NOT FOUND'}, 404)
}
NotFound.id = 'NotFound'
app.properties.set('server.NotFound', NotFound)Prior Art
For V4, this router was ported from honojs/hono which was developed under MIT license by Yusuke Wada, and enhanced and simplified to fit the IOPA architecture. Essentially the very fast Trie Router and RegExp Router are provided by hono unchanged, with most of the pipeline composition handled by IOPA
It has been developed to be a core component of the IOPA ecosystem.
License
MIT