Node.js 如何在nodejs中将值从路由器传递到控制器

我想将app.locals值传递到控制器函数中。如何在控制器内传递变量

var enroll_controller=require('../enrollController');
    router.post('/enroll',function(req,res){
        var contractAddress=req.app.locals.contractAddress;
        enroll_controller.newUser
    });

我想通过contractAddress注册\u控制器？ 有人吗？

将其作为中间件传递：

router.post('/enroll',enroll_controller.newUser);

在控制器功能中，您可以像这样直接使用它：

exports.newUser=function(req,res){
var contractAddress=req.app.locals.contractAddress
}

---

您可以编写一个全局中间件，并在该中间件中设置这些值，如果您希望它对每个路由都可用的话

// in your app.js file or main file which is wiring up application
app.use(function(req,res,next){
 req.app.locals.contractAddress = "Set address here."
 next();
});

var enroll_controller=require('../enrollController');
router.post('/enroll',enroll_controller.newUser);

或者，您可以将上述中间件导出到一个路由，并为该特定路由设置地址

    var enroll_controller=require('../enrollController');
    router.post('/enroll',
     function(req,res, next){
        // middleware running to one route only. 
        req.app.locals.contractAddress = 'set address here';        
        next();
     },
     enroll_controller.newUser
    );

---

您还可以从文件中导出此中间件，然后重用它，而不是每次都将其定义为匿名函数

如果您不想使用中间件，也可以试试这个

var enroll_controller=require('../enrollController');
router.post('/enroll',function(req,res){
    enroll_controller.newUser(req,res);
});

注册Roller.js

exports.newuser=function(req,res){
  var contractAddress=req.app.locals.contractAddress
}