如何使用Sails.js定制路由中间件？ （ExpressJS） [英] How to use custom route middleware with Sails.js? (ExpressJS)

问题描述

我刚刚打开了Node Framework Sails.js的新副本。它是建立在Express 3上。在/config/routes.js文件中有这个注释：

  / ** 
 *（1）核心中间件
 * 
 *app.use中包含的中间件首先运行，路由器前
 * / 
 
 
 / ** 
 *（2）静态路由
 * 
 *此对象将静态URL路由到处理函数 -  
 *在大多数情况下，这些函数是控制器内的操作。 
 *为了方便起见，您还可以将路由直接连接到视图或外部URL。 
 * 
 * / 
 
 module.exports.routes = {... 
  

在同一个配置文件夹中，我创建了一个名为is_ajax.js的文件。

  //仅在ajax调用上运行API。 
 module.exports.isAjax = function（req，res，next）{
 if（req.headers ['x-requested-with']）{
 //允许sails处理路由
 return next（）; 
} else {
 //加载主模板文件
 // ... 
} 
}; 
  

我的目的是使非Ajax GET请求都加载相同的模板文件，以便我的CanJS应用程序可以根据URL设置应用程序状态（所以我的javascript应用程序是正确的书签）。

我想将该脚本作为中间件运行。 有人可以告诉我如何在这种情况下使用app.use（）在其他路由之前运行is_ajax.js脚本？

我猜这是像

  var express = require（'express'）; 
 var app = express（）; 
 app.use（require（'./ is_ajax'））; 
  

只有当我执行上述操作时，才会告诉我找不到快速模块。我已经验证了express是一个模块里面的Sails的node_modules。是否有另一种加载语法？我宁可不用安装第二份快速的副本。有没有办法访问原始的Sails / Express应用程序实例？

解决方案

您可以使用政策来实现这一点。将您的 isAjax 函数保存为您的api / policies文件夹下的isAjax.js，并将其更改为仅使用 module.exports 而不是 module.exports.isAjax 。然后在您的config / policies.js文件中，您可以指定应用策略的控制器/操作 - 为每个路由运行 isAjax ，只需执行以下操作：

 '*'：'isAjax'
  

。

I've just unpacked a fresh copy of the Node framework Sails.js. It is built on Express 3. In the /config/routes.js file is this comment:

/**
 * (1) Core middleware
 *
 * Middleware included with `app.use` is run first, before the router
 */


/**
 * (2) Static routes
 *
 * This object routes static URLs to handler functions--
 * In most cases, these functions are actions inside of your controllers.
 * For convenience, you can also connect routes directly to views or external URLs.
 *
 */

module.exports.routes = { ...

In the same config folder I have created the file called is_ajax.js.

// Only run through API on ajax calls.
module.exports.isAjax = function(req, res, next){
  if (req.headers['x-requested-with']) {
    // Allow sails to process routing
    return next();
  } else {
    // Load main template file
    // ...
  }
};

My intended purpose is to make non-Ajax GET requests all load the same template file so my CanJS application can set up the application state based on the URL (so my javascript application is properly bookmark-able).

I would like to run that script as middleware. Can somebody please show me how to use app.use() in this case to have the is_ajax.js script run before other routing?

I'm guessing it's something like

var express = require('express');
var app = express();
app.use( require('./is_ajax') );

Only when I do the above, it tells me that it can't find the express module. I've verified that express is a module inside Sails' node_modules. Is there another syntax for loading it? I'd rather not have to install a second copy of express alongside sails. Is there a way to access the original Sails/Express app instance?

解决方案

You can use policies to achieve this. Save your isAjax function as isAjax.js under your api/policies folder, and change it to just use module.exports instead of module.exports.isAjax. Then in your config/policies.js file, you can specify which controllers/actions to apply the policy to--to run isAjax for every route, just do:

'*':'isAjax'

in that file.

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