使用 Node Js 服务器运行 Angular2 应用程序



我正在启动一个带有Angular2(客户端)和Node JS(服务器端)技术的新项目。

我已经设法使用nodeexpress创建了一个RESTful API。输入特定 URL 时,将显示匹配的 Json 响应。目前为止,一切都好。

现在我正在尝试将 Angular 2 集成到这个过程中。我已经创建了app.component。当显示页面时,组件未加载,我得到了一些 404 代码:

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:

├── 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

我的包.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"
  }
}

和我的索引(服务器):

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);

总而言之,索引.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 http://localhost:3000/时,我看到"索引.html正在加载..."但不显示该组件。

在Angular2官方网站上,他们使用lite-server依赖项。我想我的服务器有问题,但我不知道如何让它工作。或者有没有办法使用 Expresslite-server 实现 RESTful API?

你忘了添加一个中间件函数来提供静态文件,如js libs和css。在app.get("/", ...)之前添加此行应该有效:

app.use(express.static(__projectRoot));

安装路径包后npm i 路径 --保存

在顶部使用它

var 路径 = require('path');
并在之后使用它

var app = express();
 app.use(express.static(path.join(__dirname, 'your-dir-name')));

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