typescript node.js 表达路由分离文件最佳实践 [英] typescript node.js express routes separated files best practices
问题描述
在 Node 项目中使用 Express 和 Typescript 什么是 express.Router 的最佳实践".
using Express in a Node project along with Typescript what would be the "best practices" for express.Router.
示例目录结构
|directory_name
---server.js
|--node_modules
|--routes
---index.ts
|--admin
---admin.ts
|--products
---products.ts
|--authentication
---authentication.ts
所以在 index.ts 里面会封装和管理所有的子路由器
so inside index.ts it would encapsulate and manage all the sub-routers
//admin.ts (nested inside of index.ts)
import * as express from "express";
export = (() => {
let router = express.Router();
router.get('/admin', (req, res) => {
res.json({success: true});
});
return router;
})();
//index.ts (master file for express.Router)
import * as express from "express";
//import sub-routers
import * as adminRouter from "./admin/admin";
import * as productRouter from "./products/products";
export = (() => {
let router = express.Router();
// mount express paths, any addition middleware can be added as well.
// ex. router.use('/pathway', middleware_function, sub-router);
router.use('/products', productRouter);
router.use('/admin', adminRouter);
//return for revealing module pattern
return router;
})(); //<--- this is where I don't understand something....
最后我们将设置我们的 server.js
lastly we would set-up our server.js
//the usual node setup
//import * as *** http, body-parser, morgan, mongoose, express <-- psudocode
import * as masterRouter from './routes/index'
var app = express();
//set-up all app.use()
app.use('/api', masterRouter);
http.createServer(app).listen(8080, () => {
console.log('listening on port 8080')
};
我的主要问题是 index.ts(masterRouter 文件),它是 IIFe 的嵌套路由
my main question really is, is index.ts (masterRouter file) and it's nested routes that are IIFe's
export = (function(){})();
export = (function(){})();
这应该是为路由器编写打字稿模块的正确/最佳方式吗?
should that be the correct/best way to write typescript modules for routers?
或者使用另一种模式会更好,也许使用该模式的一种
or would it be better to use another pattern, perhaps one the utilizes the pattern
export function fnName() {} -- export class cName {} -- 导出默认值.
export function fnName() {} -- export class cName {} -- export default.
使用 IIFe 的原因是,当我将它们导入另一个文件时,我不需要初始化模块,并且每种类型的路由器只会有 1 个实例.
the reason for the IIFe is that when i import them into another file i won't need to initialize the module and there will only ever be 1 instance of each type of router.
推荐答案
在 NodeJS 中每个文件都是一个模块.声明变量不会污染全局命名空间.所以你不需要使用旧的 IIFE
技巧来正确地限定变量的范围(并防止全局污染/冲突).
In NodeJS each file is a module. Declaring variables does not pollute the global namespace. So you don't need to use the good old IIFE
trick to properly scope variables (and prevent global pollution / collision).
你会写:
import * as express from "express";
// import sub-routers
import * as adminRouter from "./admin/admin";
import * as productRouter from "./products/products";
let router = express.Router();
// mount express paths, any addition middleware can be added as well.
// ex. router.use('/pathway', middleware_function, sub-router);
router.use('/products', productRouter);
router.use('/admin', adminRouter);
// Export the router
export = router;
关于模块的更多信息:https://basarat.gitbooks.io/typescript/content/docs/项目/modules.html
这篇关于typescript node.js 表达路由分离文件最佳实践的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!