Node.js如何读取前端传来的formdata格式的数据

npm install multiparty

假设前端向'/registe'发送了数据

const multiparty = require('multiparty)
app.post('/register',(req,res)=>{
    //res.setHeader("Access-Control-Allow-Origin", "*"); 
    //res.setHeader("Access-Control-Request-Headers","*")
    //res.setHeader("Access-Control-Allow-Methods", "POST");
    let form = new multiparty.Form()
    form.parse(req,(err,fields,file)=>{
        console.log(fields)
    }
)