Koa 作为下一代 Node.js Web 框架,而且由 express 团队原班人马打造,相信会比 express 做得更好。然而我还没用上 Koa,,,所以只能来说下 express 了。算是一篇笔记吧,记录做项目时学到的东西。
项目的环境是:node v4.1.2 , express 4.x
前期工作:装好各种环境
项目大体架构:
因为开始做之前是设想着前后端分离,前后端只用ajax进行数据交互,所以就后台结构就全写成api形式。前端页面的路由由angular 1.x来实现。
express 配置 express.js
/** * Created by hwen on 15/12/12. */ 'use strict'; var express = require('express'); var favicon = require('serve-favicon'); var bodyParser = require('body-parser'); var cookieParser = require('cookie-parser'); var path = require('path'); var session = require('express-session'); var sessionStore = require('sessionstore'); var uuid = require('uuid'); var config = require('./environment'); var morgan = require('morgan'); var busboy = require('connect-busboy'); module.exports = function(app) { console.log("root is:"+config.root); app.set('views', path.join(config.root , 'public/src')); // app.engine('html', require('ejs').renderFile); app.set('view engine', 'html'); //app.use(compression()); //解析http请求体(req.body) app.use(bodyParser.urlencoded({ limit: '5000mb', extended: true })); app.use(bodyParser.json({ limit:'5000mb' })); //配置 session app.use(session({ genid: function(req) { return uuid.v1(); }, cookie:{maxAge: 900000}, secret: 'i-waka', rolling:true, resave: true, saveUninitialized: true })); app.use(cookieParser()); //app.use(busboy({ immediate: true })); 设置 immediate 会导致图片保存不完整 app.use(busboy()); // config environment app.use(favicon(config.root + '/public/src/assets/images/favicon.ico')); app.use(express.static(path.join(config.root, 'public/src'))); //控制静态资源加载根目录 app.set('appPath', config.root + 'public/src'); app.use(morgan('dev')); };
routes.js
/** * Created by hwen on 15/12/12. */ /* * Main application routes * */ 'use strict'; var erros = require('./components/errors'); module.exports = function(app) { // insert routes below app.use('/api/user', require('./api/user')); app.use('/api/question', require('./api/question')); app.use('/api/answer', require('./api/answer')); app.use('/api/topic', require('./api/topic')); app.use('/api/reply', require('./api/reply')); app.use('/api/message', require('./api/message')); app.use('/api/attitude', require('./api/attitude')); // All undefined asset or api routes should return a 404 app.route('/:url(api|components|app|config)/*').get(erros[404]); // all other routes should redirect to the index.jade app.route('/*') .get(function(req, res) { res.sendfile(app.get('appPath')+'/index.html'); }) };
app.js
/** * Created by hwen on 15/12/19. */ 'use strict'; var express =require('express'); var mongoose = require('mongoose'); var config = require('./config/environment'); //Connect to database var uri = 'mongodb://localhost:27017/test'; mongoose.connect(uri, config.mongo.options); //set up server var app = express(); var server = require('http').createServer(app); require('./config/express')(app); require('./routes')(app); //start server server.listen(config.port, function() { console.log('Express server listening on %d', config.port); console.log(config); }); // Expose app exports = module.exports = app;
以 user api 为例,
app.use('/api/user', require('./api/user'));
相应的中间件写在 /user/index.js
/** * Created by hwen on 15/12/12. */ 'use strict'; var express = require('express'), controller = require('./user.controller'); var router = express.Router(); router.post('/login', controller.login); router.post("/", controller.create); router.post("/imgUpload", controller.imgUpload); router.post("/update", controller.update); router.post("/password", controller.updatePassword); router.get('/logout', controller.logout); router.get('/currentUser', controller.currentUser); router.get("/hello", controller.hello); router.get("/followingTopic/:_id", controller.getFollowingTopic); router.get("/followingTopicAll/:_id", controller.getFollowingTopicAll); router.get("/:id", controller.get); module.exports = router;
而 /user/*.controller.js 跟 /user/*.model.js 就分别实现 controller 层以及 model 层的功能。
至此一个大概的后台架构已经算是搭建完成了~