express 中间件

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const express = require('express');
const app = express();

app.get('/detail', handle1, handle2, (req,res) => {
  res.send('detail page~');
})

/**
 * 中间件
 */
function handle1(req, res, next){
  let {num} = req.query;
  if(num > 10){
    next('大于10，不满足要求');
  }else {
    next();
  }
}

function handle2(req, res, next){
  let { num } = req.query;
  if(num == 10){
    next('等于10 ...');
  }else {
    next();
  }
}

app.listen(8080)