// proxy api requests
Object.keys(proxyTable).forEach(function (context) {
 var options = proxyTable[context]
 if (typeof options === 'string') {
  options = { target: options }
 }
 app.use(proxyMiddleware(options.filter || context, options))
})

npm install --save-dev express http-proxy-middleware

const { Nuxt, Builder } = require('nuxt')
const app = require('express')()
var proxyMiddleware = require('http-proxy-middleware')
var config = require('./nuxt.config')
// 我们用这些选项初始化 Nuxt.js：
const isProd = process.env.NODE_ENV === 'production'
const nuxt = new Nuxt({ dev: !isProd })
// 生产模式不需要 build
if (!isProd) {
 const builder = new Builder(nuxt)
 builder.build()
}

// proxy api requests这里就是添加的proxyTable中间价的设置了
var proxyTable = config.dev.proxyTable
Object.keys(proxyTable).forEach(function (context) {
  var options = proxyTable[context]
  if (typeof options === 'string') {
   options = { target: options }
  }
  app.use(proxyMiddleware(options.filter || context, options))
 })
app.use(nuxt.render)//这里是添加nuxt渲染层服务的中间件



app.listen(3000)
console.log('Server is listening on http://localhost:3000')

module.exports = {
  dev: {
  proxyTable: {
     '/api':
      {
        target: 'http://localhost:7001', // 
        pathRewrite: { '^/api': '/' }
      }
    }
   }
}

{
   "scripts": {
    "dev": "nuxt --port=8080",
    "build": "nuxt build",
    "start": "nuxt start",
    "generate": "nuxt generate",
    "lint": "eslint --ext .js,.vue --ignore-path .gitignore .",
    "precommit": "npm run lint",
    "server": "node server.js"
  }
}