Node.js express - 无需进入路由功能即可获取路由参数以进行快速分析跟踪

Question

我的目标是为我的 API 中的每条路线发送一个分析事件。与使用调用的整个完整路线保存事件相反，我想将基础 url 保存为事件，并将路线参数保存为事件的变量。例如，在保存分析事件时...

不是这个：

{
  event_title: "API User Event"
  category: "domain.com/api/user_routes/route_1/value_of_param_one"
}

但是这个:

{
  event_title: "API User Event"
  category: "domain.com/api/user_routes/route_1"
  params: {
     param_one: "value_of_param_one"
  }
}

我想要一个从请求变量获取参数的全局函数，但是，如果您在更高级别（而不是路由级别）执行此操作

app.use('/api/user_routes/*', myWrapperFunction)

myWrapperFunction 将检测 /api/user_routes 之后的所有内容作为参数。根据我的实验，我只能成功检测到特定路由函数内的实际参数。但是，这种方法要求我要么编辑每个路由函数，要么像这样包装它...

router.get('/route_1/:param_one', (req, res) => Utility.analyticsEvent(userController.routeOneFunction, req, res));

router.get('/route_2/:param_one', (req, res) => Utility.analyticsEvent(userController.routeTwoFunction, req, res));

router.get('/route_3/:param_one', (req, res) => Utility.analyticsEvent(userController.routeThreeFunction, req, res));

有没有办法在不实际进入函数本身的情况下检测路由的实际参数？或者这是对 express 的限制，因为它在找到第一个遍历路线的匹配选项之前不知道路线的细节？

Edit 如果无法知道 express 匹配特定路由之前的参数：是否有一个函数可以运行在执行路由函数之前会告诉你匹配到哪条路由，会指定参数吗？

欢迎大家评论！

Answer 1

我认为一种方法是编写如下所示的中间件。

// This will get executed before every request. As we'll add this with app.use() with top level middlewares

function customMiddleware (req, res, next) {
   let url = req.baseUrl;
   // some if else logic to re-route

   if( url.includes('/api/user_routes')) {
     let urlSplit = url.split();
     if( url[urlSplit.length() - 1] == 'param_one' ) {
       res.redirect('/api/user_routes/route_1') 
     }
     else if(url[urlSplit.length() - 1] == 'param_tow' ) {
       res.redirect('/api/user_routes/route_1') 
     }
     // and so on

   } else {
      // executes other middleware or go to matching route
      next()
   }
}

app.use(customMiddleware)

Answer 2

找到了方法在通过覆盖response.json函数

调用之后

app.use(function (req, res, next) {
  var json = res.json;
  res.json = function (body) {
      // Send analytics event before returning response     
      try { 
        // Routes that don't need to be tracked with analytics
        let notIncludeRoutes = [
          "some_not_tracked_route"
        ];
        let route = req.baseUrl + req.route.path;

        if(notIncludeRoutes.indexOf(route) === -1) {
          // Track route and params
          let route_params = res.req.params;
          Utility.analyticsEvent(route, route_params);
        }
      } catch(error) {
        // Don't block call if there was an error with analytics, but do log it
        console.log("ANALYTICS ERROR: ", error);
      }

      json.call(this, body);
  };
  next();
});

Node.js express - 无需进入路由功能即可获取路由参数以进行快速分析跟踪

Node.js express - get route params without going into the route function for quick analytics tracking

javascript

analytics

google-analytics

node.js

express