路由

Hono 的路由灵活且直观。让我们看看。

基础

// HTTP Methods
app.get('/', (c) => c.text('GET /'))
app.post('/', (c) => c.text('POST /'))
app.put('/', (c) => c.text('PUT /'))
app.delete('/', (c) => c.text('DELETE /'))

// Wildcard
app.get('/wild/*/card', (c) => {
  return c.text('GET /wild/*/card')
})

// Any HTTP methods
app.all('/hello', (c) => c.text('Any Method /hello'))

// Custom HTTP method
app.on('PURGE', '/cache', (c) => c.text('PURGE Method /cache'))

// Multiple Method
app.on(['PUT', 'DELETE'], '/post', (c) =>
  c.text('PUT or DELETE /post')
)

// Multiple Paths
app.on('GET', ['/hello', '/ja/hello', '/en/hello'], (c) =>
  c.text('Hello')
)

路径参数

app.get('/user/:name', async (c) => {
  const name = c.req.param('name')
  // ...
})

或所有参数一次性

app.get('/posts/:id/comment/:comment_id', async (c) => {
  const { id, comment_id } = c.req.param()
  // ...
})

可选参数

// Will match `/api/animal` and `/api/animal/:type`
app.get('/api/animal/:type?', (c) => c.text('Animal!'))

正则表达式

app.get('/post/:date{[0-9]+}/:title{[a-z]+}', async (c) => {
  const { date, title } = c.req.param()
  // ...
})

包含斜杠

app.get('/posts/:filename{.+\\.png$}', async (c) => {
  //...
})

链式路由

app
  .get('/endpoint', (c) => {
    return c.text('GET /endpoint')
  })
  .post((c) => {
    return c.text('POST /endpoint')
  })
  .delete((c) => {
    return c.text('DELETE /endpoint')
  })

分组

您可以使用 Hono 实例对路由进行分组，并使用 route 方法将它们添加到主应用程序。

const book = new Hono()

book.get('/', (c) => c.text('List Books')) // GET /book
book.get('/:id', (c) => {
  // GET /book/:id
  const id = c.req.param('id')
  return c.text('Get Book: ' + id)
})
book.post('/', (c) => c.text('Create Book')) // POST /book

const app = new Hono()
app.route('/book', book)

不更改基址的分组

您也可以在保持基址的情况下对多个实例进行分组。

const book = new Hono()
book.get('/book', (c) => c.text('List Books')) // GET /book
book.post('/book', (c) => c.text('Create Book')) // POST /book

const user = new Hono().basePath('/user')
user.get('/', (c) => c.text('List Users')) // GET /user
user.post('/', (c) => c.text('Create User')) // POST /user

const app = new Hono()
app.route('/', book) // Handle /book
app.route('/', user) // Handle /user

基址路径

您可以指定基址路径。

const api = new Hono().basePath('/api')
api.get('/book', (c) => c.text('List Books')) // GET /api/book

使用主机名进行路由

如果包含主机名，它可以正常工作。

const app = new Hono({
  getPath: (req) => req.url.replace(/^https?:\/([^?]+).*$/, '$1'),
})

app.get('/www1.example.com/hello', (c) => c.text('hello www1'))
app.get('/www2.example.com/hello', (c) => c.text('hello www2'))

使用 host 头部值进行路由

如果您在 Hono 构造函数中设置了 getPath() 函数，Hono 可以处理 host 头部值。

const app = new Hono({
  getPath: (req) =>
    '/' +
    req.headers.get('host') +
    req.url.replace(/^https?:\/\/[^/]+(\/[^?]*)/, '$1'),
})

app.get('/www1.example.com/hello', (c) => c.text('hello www1'))

// A following request will match the route:
// new Request('http://www1.example.com/hello', {
//  headers: { host: 'www1.example.com' },
// })

通过应用此方法，例如，您可以通过 User-Agent 头部更改路由。

路由优先级

处理程序或中间件将按照注册顺序执行。

app.get('/book/a', (c) => c.text('a')) // a
app.get('/book/:slug', (c) => c.text('common')) // common

GET /book/a ---> `a`
GET /book/b ---> `common`

当处理程序执行时，进程将停止。

app.get('*', (c) => c.text('common')) // common
app.get('/foo', (c) => c.text('foo')) // foo

GET /foo ---> `common` // foo will not be dispatched

如果您有要执行的中间件，请在处理程序上方编写代码。

app.use(logger())
app.get('/foo', (c) => c.text('foo'))

如果您想拥有一个“后备”处理程序，请在其他处理程序下方编写代码。

app.get('/bar', (c) => c.text('bar')) // bar
app.get('*', (c) => c.text('fallback')) // fallback

GET /bar ---> `bar`
GET /foo ---> `fallback`

分组顺序

请注意，分组路由的错误很难发现。route() 函数将从第二个参数（例如 three 或 two）中获取存储的路由，并将其添加到自己的路由（two 或 app）中。

three.get('/hi', (c) => c.text('hi'))
two.route('/three', three)
app.route('/two', two)

export default app

它将返回 200 响应。

GET /two/three/hi ---> `hi`

但是，如果它们的顺序错误，它将返回 404。

three.get('/hi', (c) => c.text('hi'))
app.route('/two', two) // `two` does not have routes
two.route('/three', three)

export default app

GET /two/three/hi ---> 404 Not Found