问题描述
我正在使用Angular2（客户端）和Node JS（服务器端）技术开始一个新项目。
I'm starting a new project with Angular2 (client-side) and Node JS (server-side) technologies.
我已经设法创建了一个RESTful API使用节点和 express 。当输入特定的URL时，将显示匹配的Json响应。到目前为止这么好。
I've managed to create a RESTful API using node and express. When specific URL is entered, the matching Json response is displayed. So far so good.
现在我正在整合Angular 2。我创建了app.component。当页面显示时，组件未加载，我有一些404代码：
Now I'm trying to integrate Angular 2 in the process. I've created the app.component. When the page is displayed, the component is not loaded and I got some 404 codes:
Failed to load resource: 404 (not found) http://localhost:3000/node_modules/core-js/client/shim.min.js
...
Failed to load resource: 404 (not found) http://localhost:3000/systemjs.config.js
这是我的项目结构： / p>
Here is my project structure:
├── App
| └── app.component.ts //copied from Angular2/get-started
| └── main.ts // copied from Angular2/get-started
├── dist //contains generated JS files
├── node_modules
├── server // contains Server Typescript files
├── index.html // copied from Angular2/get-started
├── index.ts // server entry point
├── package.json
├── systemjs.config.js
├── tsconfig.json
├── typings.json
我的package.json：
My package.json:
{
"main": "index.js",
"scripts": {
"start": "tsc && concurrently \"npm run tsc:w\" \"node dist/js/index.js\" ",
"postinstall": "typings install",
"tsc": "tsc",
"tsc:w": "tsc -w",
"typings": "typings"
},
"dependencies": {
"@angular/common": "2.0.0-rc.1",
"@angular/compiler": "2.0.0-rc.1",
"@angular/core": "2.0.0-rc.1",
"@angular/http": "2.0.0-rc.1",
"@angular/platform-browser": "2.0.0-rc.1",
"@angular/platform-browser-dynamic": "2.0.0-rc.1",
"@angular/router": "2.0.0-rc.1",
"@angular/router-deprecated": "2.0.0-rc.1",
"@angular/upgrade": "2.0.0-rc.1",
"systemjs": "0.19.27",
"core-js": "^2.4.0",
"reflect-metadata": "^0.1.3",
"rxjs": "5.0.0-beta.6",
"zone.js": "^0.6.12",
"angular2-in-memory-web-api": "0.0.11",
"bootstrap": "^3.3.6",
"express": "^4.13.4",
"mysql": "^2.5.4"
},
"devDependencies": {
"concurrently": "^2.0.0",
"typescript": "^1.8.10",
"typings": "^1.0.4"
}
}
我的index.ts（服务器）：
And my index.ts (server):
var express = require('express');
var app = express();
var path = require('path');
var __projectRoot = __dirname + '/../../';
app.get('/', function (req, res) {
res.sendFile(path.join(__projectRoot + '/index.html'));
});
console.log('Server up and running on http://localhost:3000/');
app.listen(server_port);
得出结论，index.html：
To conclude, index.html:
<html>
<head>
<script>document.write('<base href="' + document.location + '" />');</script>
<title>Angular 2 QuickStart</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 1. Load libraries -->
<!-- Polyfill(s) for older browsers -->
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<!-- 2. Configure SystemJS -->
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function (err) {
console.error(err);
});
</script>
</head>
<!-- 3. Display the application -->
<body>
<h1>index.html</h1>
<my-app>Loading...</my-app>
</body>
</html>
加载，我看到Index.html加载...，但不显示该组件。
When loading http://localhost:3000/, I see "Index.html Loading..." but the component is not displayed.
在官方Angular2网站上，他们使用 lite-server 依赖关系。我想我的服务器有问题，但是我无法弄明白如何使其工作。或者有没有办法使用 Express 和 lite-server 实现RESTful API？
On the official Angular2 website, they use lite-server dependency. I guess my server has something wrong, but I can't figure out how to make it work. Or is there a way to implement RESTful API using Express and lite-server?
推荐答案
你忘了添加一个中间件函数来提供像js libs和css这样的静态文件。在 app.get（/，...）之前添加此行应该可以工作：
You forgot to add a middleware function to serve static files like js libs and css. Adding this line before app.get("/", ...) should work:
app.use(express.static(__projectRoot));
这篇关于运行Angular2应用程序与Node Js服务器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！