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https://github.com/pedronauck/micro-router

:station: A tiny and functional router for Zeit's Micro
https://github.com/pedronauck/micro-router

async await micro microservice nodejs router routing zeit

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:station: A tiny and functional router for Zeit's Micro

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README 

        
:station: _**Micro Router -**_ A tiny and functional router for ZEIT's [micro](https://github.com/zeit/micro)



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## 👌   Features



* **Tiny**. Just couple lines of code.

* **Functional**. Write your http methods using functions.

* **Async**. Design to use with `async/await`



## 💻   Usage



Install as project dependency:



```bash

$ yarn add microrouter

```



Then you can define your routes inside your microservice:



```js

const { send } = require('micro')

const { router, get } = require('microrouter')



const hello = (req, res) => send(res, 200, `Hello ${req.params.who}`)



const notfound = (req, res) => send(res, 404, 'Not found route')



module.exports = router(get('/hello/:who', hello), get('/*', notfound))

```



### `async/await`



You can use your handler as an async function:



```js

const { send } = require('micro')

const { router, get } = require('microrouter')



const hello = async (req, res) =>

  send(res, 200, await Promise.resolve(`Hello ${req.params.who}`))



module.exports = router(get('/hello/:who', hello))

```



### route methods



Each route is a single basic http method that you import from `microrouter` and has the same arguments:



* `get(path = String, handler = Function)`

* `post(path = String, handler = Function)`

* `put(path = String, handler = Function)`

* `patch(path = String, handler = Function)`

* `del(path = String, handler = Function)`

* `head(path = String, handler = Function)`

* `options(path = String, handler = Function)`



#### path



A simple url pattern that you can define your path. In this path, you can set your parameters using a `:` notation. The `req` parameter from `handler` will return these parameters as an object.



For more information about how you can define your path, see [url-pattern](https://github.com/snd/url-pattern) that's the package that we're using to match paths.



#### handler



The `handler` method is a simple function that will make some action base on your path.

The format of this function is `(req, res) => {}`



##### `req.params`



As you can see below, the `req` parameter has a property called `params` that represents the parameters defined in your `path`:



```js

const { router, get } = require('microrouter')

const request = require('some-request-lib')



// service.js

module.exports = router(

  get('/hello/:who', (req, res) => req.params)

)



// test.js

const response = await request('/hello/World')



console.log(response)  // { who: 'World' }

```



##### `req.query`



The `req` parameter also has a `query` property that represents the `queries` defined in your requision url:



```js

const { router, get } = require('microrouter')

const request = require('some-request-lib')



// service.js

module.exports = router(

  get('/user', (req, res) => req.query)

)



// test.js

const response = await request('/user?id=1')



console.log(response)  // { id: 1 }

```



### Parsing Body



By default, router _doesn't parse anything_ from your requisition, it's just match your paths and execute a specific handler. So, if you want to parse your body requisition you can do something like that:



```js

const { router, post } = require('microrouter')

const { json, send } = require('micro')

const request = require('some-request-lib')



// service.js

const user = async (req, res) => {

  const body = await json(req)

  send(res, 200, body)

}



module.exports = router(

  post('/user', user)

)



// test.js

const body = { id: 1 }

const response = await request.post('/user', { body })

```



### UrlPattern instance as path



The package [url-pattern](https://github.com/snd/url-pattern) has a lot of options inside it to match url. If you have a different need for some of your paths, like a make pattern from a regexp, you can pass an instance of `UrlPattern` as the path parameter:



```js

const UrlPattern = require('url-pattern')

const { router, get } = require('microrouter')



const routes = router(

  get(

    new UrlPattern(/^\api/),

    () => 'This will match all routes that start with "api"'

  )

)

```



### Namespaced Routes



If you want to create nested routes, you can define a namespace for your routes using the `withNamespace` high order function:



```js

const { withNamespace, router, get } = require('microrouter')

const { json, send } = require('micro')



const oldApi = withNamespace('/api/v1')

const newApi = withNamespace('/api/v2')



const routes = router(

  oldApi(get('/', () => 'My legacy api route')),

  newApi(get('/', () => 'My new api route'))

)

```



_PS: The nested routes doesn't work if you pass a UrlPattern instance as path argument!_



## 🕺   Contribute



1.  [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device

2.  Install dependencies using Yarn: `yarn install`

3.  Make the necessary changes and ensure that the tests are passing using `yarn test`

4.  Send a pull request 🙌