Express常用的第三方包

npm i cors
//app.js中
let cors = require("cors")
app.use(cors())

npm i multiparty

let multiparty = require('multiparty')
router.post('/upImg',(req,res)=>{
  let form = new multiparty.Form()
  form.uploadDir = 'upload'
  form.parse(req,(err,formData,imgData)=>{
    res.send({
      code:200,
      imgPath:`http://127.0.0.1:3000/${imgData.file[0].path}`
    })
  })
})