我可以将一个函数的参数req,res,next传递给另一个函数吗?

问题描述

搜索了一下,但没有找到要搜索内容我有Node应用程序和两个功能

router.get('/get/user-relevant-data',(req,res,next)=>{
    //some code is executed here
    return res.status(200).json(userRelevantData)
})
router.get('/get/updated-user',next) => {
    // I want to call '/get/user-relevant-data' and assign the returned object to another variable
    let userRelevantData = // how to call the function here correctly?
})

我将如何做这些事情(如果可行的话)还是应该避免这样的代码?如果应该避免这样的代码,除了将一个函数代码放入另一个函数之外,我还能做些什么。

解决方法

您可以通过这种方式更改设置路由器的方式,您可以像这样应用尽可能多的中间件:

const middleware1 = require("....") //adress to the file your middleware is located
const middleware2 = require("....") //adress to the file your middleware is located


router.get('/directory',middleware1,middleware2 )

,然后在另一个文件中以这种方式定义中间件:

exports.middleware1 = (req,res,next) => {
   //do some coding
 req.something= someDataToPass
            next()   

//you add the data you want to pass to next middleware to the req obj
// and then access that in the next middleware from the req object then
// call next to run the next middleware

}

然后在另一个文件或相同的文件中键入如下所示的另一个中间件:

exports.middleware2 = (req,next) => {
   //do some coding
 data = req.something
//get data from last middeleware
res.json({})
}

,同时您可以访问两个中间件中的所有req数据