本文實現(xiàn)用nodejs搭建一個簡單的服務(wù)端，用json文件模擬數(shù)據(jù)庫，適合前端在模擬數(shù)據(jù)測試的時候使用

必備

• node環(huán)境
• express插件
• body-parse 插件
• fs插件

目錄結(jié)構(gòu)

文件內(nèi)容

• nodeService.js

  const express = require('express')
  const bodyParser = require('body-parser')
  const fs = require('fs')
  
  function readText (pathname) {
    var bin = fs.readFileSync(pathname)
  
    if (bin[0] === 0xEF && bin[1] === 0xBB && bin[2] === 0xBF) {
      bin = bin.slice(3)
    }
  
    return bin.toString('utf-8')
  }
  
  // 創(chuàng)建express實例
  const app = express()
  // 設(shè)置跨域訪問
  app.all('*', function(req, res, next) {
    res.header('Access-Control-Allow-Origin', '*')
    res.header('Access-Control-Allow-Headers', 'X-Requested-With, accept, origin, content-type')
    res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS')
    res.header('X-Powered-By', ' 3.2.1')
    res.header('Content-Type', 'application/json;charset=utf-8')
    next()
  })
  // 將請求體變成熟悉的鍵值對樣子
  app.use(bodyParser.uselencoded({extended: false}))
  app.user(bodyParser.json())
  
  // 開始寫接口
  // 例：接口為/client/任意參數(shù), 就愛那個數(shù)據(jù)插入database的clients.json中
  app.route('/client/:id')
    .put((req, res) => {
    let options = req.body
    let id = req.params[0]
    let allClient = readText('./database/clients.json')
    let t = JSON.parse(allClient)
    for (let i in t) {
    if (JSON.parse(t[i]).id === id) {
      t[i] = JSON.stringify(options)
      fs.writeFileSync('./database/clients.json', JSON.stringify(t))
      let response = {
        msg: 'success',
        clients: t[i]
      }
      res.status(200)
      res.send(response)
      return
    }
  }
  res.status(500)
  res.send({msg: 'failed'})
  })
  
  // 開啟服務(wù)器
  const server = app.listen(3000, function() {
    var host = server.address().address
    var port = server.address().port
    console.log('Example app listening at http://%s:%s', host, port)
  })

• fileDetail.json

[]

運行方式

  在該目錄下
  node nodeService.js

請求方式

$.ajax({
  url: 'localhost:3000/client/' + n //n為任意參數(shù)，服務(wù)端通過req.params.id獲取
  type: 'put'
}).then((res) => { 
  console.log(res) 
}).catch((err) => {
  console.log(err)
})