第一步:新建Express项目

最后更新于:2022-04-01 03:19:03

## 第一步:新建Express项目 创建一个新目录newedenfaces,进入目录并创建两个空文件 *package.json*和*server.js*: ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2015-09-14_55f641e9f153c.jpg) 注:我的OS X终端使用了[Monokai](https://github.com/stephenway/monokai.terminal)主题和[oh-my-fish](https://github.com/oh-my-fish/oh-my-fish)框架以提供[Fish](http://fishshell.com/) shell. 打开*package.json*并粘贴下面的代码: ~~~ { "name": "newedenfaces", "description": "Character voting app for EVE Online", "version": "1.0.0", "repository": { "type": "git", "url": "https://github.com/sahat/newedenfaces-react" }, "main": "server.js", "scripts": { "start": "babel-node server.js", "watch": "nodemon --exec babel-node -- server.js" }, "dependencies": { "alt": "^0.17.1", "async": "^1.4.0", "babel": "^5.6.23", "body-parser": "^1.13.2", "colors": "^1.1.2", "compression": "^1.5.1", "express": "^4.13.1", "mongoose": "^4.0.7", "morgan": "^1.6.1", "react": "^0.13.3", "react-router": "^0.13.3", "request": "^2.58.0", "serve-favicon": "^2.3.0", "socket.io": "^1.3.6", "swig": "^1.4.2", "underscore": "^1.8.3", "xml2js": "^0.4.9" }, "devDependencies": { "babelify": "^6.1.3", "bower": "^1.4.1", "browserify": "^11.0.0", "gulp": "^3.9.0", "gulp-autoprefixer": "^2.3.1", "gulp-concat": "^2.6.0", "gulp-cssmin": "^0.1.7", "gulp-if": "^1.2.5", "gulp-less": "^3.0.3", "gulp-plumber": "^1.0.1", "gulp-streamify": "0.0.5", "gulp-uglify": "^1.2.0", "gulp-util": "^3.0.6", "vinyl-source-stream": "^1.1.0", "watchify": "^3.3.0" }, "license": "MIT" } ~~~ 这是我们的应用所需要的所有依赖包,简要介绍如下: | 包名称 | 描述 | | --- | --- | | [alt](https://github.com/goatslacker/alt) | React的Flux实现 | | [async](https://github.com/caolan/async) | 异步流程控制 | | [babel](http://babeljs.io/) | ES6转换为ES5 | | [body-parser](https://github.com/expressjs/body-parser) | 渲染POST请求数据 | | [colors](https://github.com/marak/colors.js/) | 美化控制台输出结果 | | [compression](https://github.com/expressjs/compression) | Gzip压缩 | | [express](http://expressjs.com/) | Node.js Web框架 | | [mongoose](http://mongoosejs.com/) | MongoDB ODM | | [morgan](https://github.com/expressjs/morgan) | HTTP请求日志 | | [react](http://facebook.github.io/react/) | React框架 | | [react-router](https://github.com/rackt/react-router) | React路由库 | | [request](https://github.com/request/request) | HTTP请求库 | | [serve-favicon](https://github.com/expressjs/serve-favicon) | 提供*favicon.png* | | [socket.io](http://socket.io/) | 显示有多少用户在线 | | [swig](http://paularmstrong.github.io/swig/) | 渲染HTML | | [underscore](http://underscorejs.org/) | JS辅助库 | | [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js) | 将XML渲染为JSON | 在终端输入`npm install`安装依赖。 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2015-09-14_55f641ea26cd5.jpg) > 如果你使用Windows,可以使用[cmder](http://bliker.github.io/cmder)控制台模拟器,可以达到接近OS X/Linux终端的效果。 打开*server.js*粘贴下面代码,下面是最基础的Express应用,足够我们开始了。 ~~~ var express = require('express'); var path = require('path'); var logger = require('morgan'); var bodyParser = require('body-parser'); var app = express(); app.set('port', process.env.PORT || 3000); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(express.static(path.join(__dirname, 'public'))); app.listen(app.get('port'), function() { console.log('Express server listening on port ' + app.get('port')); }); ~~~ > 注意:尽管我们将使用ES6编写React app,但在这儿我还是决定使用ES5,因为这段代码从两年前到现在基本没有变过。并且,如果你第一次使用ES6,至少这个Express app对你来说还算熟悉。 然后,新建文件夹public,这里是我们放文件如图片、字体,以及压缩后的CSS和JS文件。 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2015-09-14_55f641ea941d5.jpg) 现在你可以在终端输入`npm start`启动应用,确保Express app没有问题。 > 注意:你现在可以使用`node server.js`来直接启动应用,但之后我们将使用Babel来预编译文件,也就是说你需要运行`babel-node server.js`来启动应用。 现在你应该可以看到终端输出“Express server listening on port 3000.”
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