自定义服务端路由

• Basic custom server
• Express integration
• Hapi integration
• Koa integration
• Parameterized routing
• SSR caching

一般你使用next start命令来启动 next 服务，你还可以编写代码来自定义路由，如使用路由正则等。

当使用自定义服务文件，如下面例子所示叫 server.js 时，确保你更新了 package.json 中的脚本。

{
  "scripts": {
    "dev": "node server.js",
    "build": "next build",
    "start": "NODE_ENV=production node server.js"
  }
}

下面这个例子使 /a 路由解析为./pages/b，以及/b 路由解析为./pages/a;

// This file doesn't go through babel or webpack transformation.
// Make sure the syntax and sources this file requires are compatible with the current node version you are running
// See https://github.com/zeit/next.js/issues/1245 for discussions on Universal Webpack or universal Babel
const { createServer } = require('http')
const { parse } = require('url')
const next = require('next')

const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

app.prepare().then(() => {
  createServer((req, res) => {
    // Be sure to pass `true` as the second argument to `url.parse`.
    // This tells it to parse the query portion of the URL.
    const parsedUrl = parse(req.url, true)
    const { pathname, query } = parsedUrl

    if (pathname === '/a') {
      app.render(req, res, '/b', query)
    } else if (pathname === '/b') {
      app.render(req, res, '/a', query)
    } else {
      handle(req, res, parsedUrl)
    }
  }).listen(3000, err => {
    if (err) throw err
    console.log('> Ready on http://localhost:3000')
  })
})

next的 API 如下所示

• next(opts: object)

opts 的属性如下:

• dev (boolean) 判断 Next.js 应用是否在开发环境 - 默认false
• dir (string) Next 项目路径 - 默认'.'
• quiet (boolean) 是否隐藏包含服务端消息在内的错误信息 - 默认false
• conf (object) 与next.config.js的对象相同 - 默认{}

生产环境的话，可以更改 package.json 里的start脚本为NODE_ENV=production node server.js。