Question

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。

我已设法使用node和express创建RESTful API。输入特定URL时，将显示匹配的Json响应。到目前为止一切都很好。

现在我正在尝试将Angular 2集成到这个过程中。我创建了app.component。显示页面时，未加载组件，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）：

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);

总结一下，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http://localhost:3000/时，我看到＆＃34; Index.html正在加载......＆＃34;但不显示该组件。

在Angular2官方网站上，他们使用lite-server依赖关系。我想我的服务器有问题，但我无法弄清楚如何使它工作。或者有没有办法使用Express和lite-server？

实现RESTful API

Answer 1

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

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

Answer 2

安装路径包后 npm i path --save

在顶部使用此功能

var path = require('path');

并在

之后使用

var app = express();

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

使用Node Js服务器运行Angular2应用程序

2 个答案: