在中间件中获取路由定义 [英] Get route definition in middleware

问题描述

有谁知道是否可以获取用于触发路由的路径?

Does anyone know if it's possible to get the path used to trigger the route?

例如，假设我有这个:

app.get('/user/:id', function(req, res) {});

使用以下简单的中间件

function(req, res, next) {
     req.?
});

我希望能够在中间件中获取 /user/:id，这不是 req.url.

I'd want to be able to get /user/:id within the middleware, this is not req.url.

推荐答案

你想要的是req.route.path.

例如:

app.get('/user/:id?', function(req, res){
  console.log(req.route);
});

// outputs something like

{ path: '/user/:id?',
  method: 'get',
  callbacks: [ [Function] ],
  keys: [ { name: 'id', optional: true } ],
  regexp: /^/user(?:/([^/]+?))?/?$/i,
  params: [ id: '12' ] }

http://expressjs.com/api.html#req.route

正如评论中所解释的，在中间件中获取 req.route 很困难/很困难.路由器中间件是填充 req.route 对象的中间件，它的级别可能低于您正在开发的中间件.

As explained in the comments, getting req.route in a middleware is difficult/hacky. The router middleware is the one that populates the req.route object, and it probably is in a lower level than the middleware you're developing.

这样，只有在 Express 本身执行之前，您挂钩路由器中间件为您解析 req，才能获得 req.route.

This way, getting req.route is only possible if you hook into the router middleware to parse the req for you before it's executed by Express itself.

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