next.js 开启Proxy反向代理

本地开发使用

需要安装的包 http-proxy-middleware express

const express = require('express')
const next = require('next')
const createProxyMiddleware = require('http-proxy-middleware').createProxyMiddleware;

const hostname = '0.0.0.0'
const port = parseInt(process.env.PORT, 10) || 8087
const dev = process.env.NODE_ENV !== 'production' //只在开发环境使用
const app = next({
  dev,
  hostname,
  port
})
const handle = app.getRequestHandler()

app.prepare()
  .then(() => {
    const server = express()
    //写在这里可以获取环境变量
    const devProxy = {
      [process.env.NEXT_PUBLIC_BASE_API]: {
        target: 'http://xxxx', // 外网测试环境
        changeOrigin: true,
        pathRewrite: { '^/api': '' },
      },
      [process.env.NEXT_PUBLIC_WEBSOCKET_PUSH_API]: {
        target: 'ws://xxxx', // 外网ws测试环境
        changeOrigin: true,
        ws: true,
        pathRewrite: { '^/wsapi': '' },
      },
    }
    if (dev && devProxy) {
      Object.keys(devProxy).forEach((context) => {
        server.use(createProxyMiddleware(context, devProxy[context]))
      })
    }

    server.all('*', (req, res) => {
      handle(req, res)
    })

    server.listen(port, err => {
      if (err) {
        throw err
      }
      console.log(`http://0.0.0.0:${port}`)
      console.log(`> Ready on http://localhost:${port}`)
    })
  })
  .catch(err => {
    console.log('An error occurred, unable to start the server')
    console.log(err)
  })

package.json修改

"scripts": {
    "dev": "node proxy.js", //代理文件文件位置
    "build": "next build",
    "build:test": "cross-env NODE_ENV=test next build",
    "build:mode": "cross-env ANALYZE=true next build",
    "start": "next start",
    "lint": "next lint"
  },