服务器

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.18.2",
    "multer": "^1.4.5-lts.1"
  }
}

const express = require('express')

// 创建Web服务器
const app = express();
const port = 3000;
const host = '127.0.0.1'

// 引入模块化路由
const routerUser = require('./router/user')
const routerUploadImg = require('./router/uploadImg')
const routerGood = require('./router/good')
const routerTodo = require('./router/todo')
const routerCart = require('./router/cart')
const routerOrder = require('./router/order')
const routerMsg = require('./router/msg')
const routerForm = require('./router/form')

// 静态资源；系统中间件-靠前引用；路由中间件
app
  .use(express.static('./public'))
  .use(express.urlencoded({ extended: true }))  // for parsing application/x-www-form-urlencoded
  .use(express.json())  // for parsing application/json when POST
  .use('/user', routerUser)
  .use('/uploadimg', routerUploadImg)
  .use('/good', routerGood)
  .use('/todo', routerTodo)
  .use('/cart', routerCart)
  .use('/order', routerOrder)
  .use('/msg', routerMsg)
  .use('/form', routerForm)

app.listen(port, host, () => {
  console.log(`server is on at:http://${host}:${port}`);
});

const express = require('express')
const multer = require('multer')
const path = require('path')
const router = express.Router()

const storage = multer.diskStorage({
  destination: (req, file, callback) => {
    callback(null, __dirname + "/public/upload");
  },
  filename: (req, file, callback) => {
    console.log('file', file);
    let ext = path.extname(file.originalname)
    callback(null, file.fieldname + Date.now() + ext)
  }
})

const upload = multer({
  storage: storage
})

router.post('/', upload.single('avatar'), (req, res) => {
  console.log('req.file', req.file)
  res.json({
    "errno": 0,
    "data": {
      "url": 'http://127.0.0.1:3000/upload/' + req.file.filename,
    }
  })
})

module.exports = router;

const fs = require('fs');
const express = require('express')
const router = express.Router()

router.get('/', (req, res) => {
  console.log(req.query);
  let file = fs.readFileSync('./public/data/' + req.query.usn + '.json', 'utf8')
  let jsonFile = JSON.parse(file)
  console.log(jsonFile);
  res.json({
    "errno": 0,
    "msg": 'get ok',
    "data": jsonFile
  })
})

router.get('/login', (req, res) => {
  console.log('req.query', req.query);
  let file = fs.readFile('./public/data/' + req.query.usn + '.json', 'utf8', (err, data) => {
    if (err) {
      res.json({
        "errno": 2,
        "msg": 'user not exist'
      })
    } else {
      let jsonFile = JSON.parse(data)
      if (req.query.upass === jsonFile.upass) {
        res.json({
          "errno": 0,
          "msg": 'login ok',
          "data": jsonFile
        })
      } else {
        res.json({
          "errno": 1,
          "msg": 'pass not match'
        })
      }
    }
  })
})

router.post('/register', (req, res) => {
  if (fs.existsSync('./public/data/' + req.body.usn + '.json')) {
    res.json({
      "errno": 2,
      "msg": 'user exist'
    })
    return;
  }
  fs.writeFile('./public/data/' + req.body.usn + '.json', JSON.stringify(req.body), (err) => {
    if (err) {
      console.log('保存文件失败')
      res.json({
        "errno": 1,
        "msg": 'try later'
      })
    } else {
      console.log('保存文件成功')
      res.json({
        "errno": 0,
        "msg": 'register ok'
      })
    }
  })
})

router.post('/modify', (req, res) => {
  console.log('modify', req.body);
  const data = JSON.parse(fs.readFileSync('./public/data/' + req.body.usn + '.json', 'utf8'));
  data[req.body.ukey] = req.body.uvalue
  fs.writeFile('./public/data/' + req.body.usn + '.json', JSON.stringify(data, null, 4), (error) => {
    if (error) {
      console.log('保存文件失败')
      res.json({
        "errno": 2,
        "msg": 'try later'
      })
    } else {
      console.log('保存文件成功')
      res.json({
        "errno": 0,
        "msg": 'modify ok'
      })
    }
  })
})

module.exports = router