如何在节点js中获取router.get（）之外的变量答案

【问题标题】：how to get variable outside router.get() in node js如何在节点js中获取router.get（）之外的变量
【发布时间】：2021-07-05 02:57:32
【问题描述】：

global.folder_name= null ;

// upload = uploadFunc.echo('ild')
// At Route /upload/ild
router.post('/',(req, res)=>{
    folder_name = req.body.folder_name;
    console.log(`inside route ${folder_name}`)
    res.status(200).redirect('/upload/ild/done')
    
})

upload = uploadFunc.echo(folder_name);
console.log(folder_name)


// At Route /upload/ild/
router.get('/done', upload.array('avatar'), (req, res) => {


    return res.json({ status: 'OK' });
});

上面的代码在 '/' 路由内的控制台中给出了 undefined 我想从一条路由中获取文件夹名称并将其传递给另一条路由...

【问题讨论】：

标签： node.js mongodb mean-stack mern

【解决方案1】：

第一种解决方案（全局变量）：

let folder_name = null;

router.post('/',(req, res)=> {
  folder_name = req.body.folder_name;
});

upload = uploadFunc.echo(folder_name);

第二个解决方案（使用路由器内部的上传块）：

router.post('/',(req, res)=> {
  folder_name = req.body.folder_name;
  upload = uploadFunc.echo(folder_name);
});

【讨论】：