我可以將一個函數的參數（req、res、next）傳遞給另一個函數嗎？

Question

我搜索了一點，但沒有找到我要搜索的內容。 我有 Node 應用程序和兩個功能：

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', (req,res,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?
})

我將如何做這樣的事情（如果可行）或者應該避免這樣的代碼？ 如果應該避免這樣的代碼，除了將一個函數的代碼放入另一個函數之外，我還能做什么。

Answer 1

你可以改變你設置路由器的方式，你可以像這樣應用盡可能多的中間件：

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 )

在另一個文件中，您以這種方式定義中間件：

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

}

然后在另一個文件或同一個文件中鍵入另一個中間件，如下所示：

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

同時您可以訪問兩個中間件中的所有請求數據