express 热启动 静态文件部署 跨域解决 调试

1.热启动

每次修改app.js文件，都得重新启动项目，十分不方便。这里可以用hotnode插件实现热启动

安装：$ npm install -g hotnode

启动项目：$ hotnode app.js

2.静态文件部署

app.use(express.static(__dirname + '/src/static'));指定了src目录下的static为静态目录，__dirname 是app.js的绝对路径 node自带的

这样可以直接访问到静态文件 http://localhost:8081/aaa.js 其中aaa.js是放在src目录下的static的。

可以指定多个目录为静态文件夹 如：

app.use(express.static(__dirname + '/src/static1'));

app.use(express.static(__dirname + '/src/static2'));

3.跨域

安装：$ npm install express-http-proxy --save

使用：

var proxy = require('express-http-proxy');
var app = require('express')();
app.use('/proxy', proxy('www.google.com'));

4.调试

使用命令$ npm install -g node-inspector 安装。安装后就可以使用了。

启动调试项目 $ supervisor --debug app.js

再打开一个控制面板 启动调试监控 $ node-inspector -p 8081 这时cmd输出的“http://127.0.0.1:8081/?port=5858”就是调试网址

复制到浏览器 打断点跟js一样

付上我的app.js文件

//demo.js 文件
var express = require('express'),
    hbs = require('hbs'),
    cookieParser = require('cookie-parser'),
    session = require('express-session'),
    fs = require('fs'),
    http = require('http'),
    app = express();

app.use(cookieParser());
app.use(session({
    secret: '123456',
    cookie: {maxAge: 60 * 1000 * 30},
    resave: false,
    saveUninitialized: true
}));

app.use(express.static(__dirname + '/src/static'));

app.get('/hello', function (req, res) {
    res.send('HELLO');
});

var user = require(__dirname + '/src/server/user.js');
app.get('/login', function (req, res) {
if (req.session.sign) {//检查用户是否登录
        res.send('welecome <strong>' + req.session.name + '</strong>, 欢迎你再次登录');
    } else {
        user.login('王冲', '111qqq',function(userInfo){
            req.session.sign = true;
            req.session.name = userInfo.userName;
            res.send('欢迎登录,' + req.session.name);
        });
    }
});

//app.get('/index', function (req, res) {
//    console.log(__dirname);
//    res.sendFile(__dirname + '/src/views/' + 'index.html');
//});

app.get('/process_get', function (req, res) {
var response = {
        firstName: req.query.firstName,
        lastName: req.query.lastName
    }
    console.log(response);
    res.end(JSON.stringify(response));
});

hbs.registerPartials(__dirname + '/src/views/partials');
app.set('view engine', 'hbs');
app.set('views', __dirname + '/src/views/');

app.get('/news', function (req, res) {
var userInfo = {
        userName: req.session.name
    }
    res.render('index', {title: 'hbs news demo', author: 'qujh',userInfo:userInfo});
});


app.get('/about/ygt', function (req, res) {
    res.render('about/test', {title: 'hbs ygt demo', author: 'qujh'});
});

app.get('/about/about', function (req, res) {
    res.render('about/about', {title: 'hbs about demos', author: 'qujh'});
});

var server = app.listen(8081, function () {
var host = server.address().address
var port = server.address().port
    console.log("应用实例，访问地址为 http://%s:%s", host, port);
});

附上配置文件 package.json

{
"name": "expressgulp",
"version": "1.0.0",
"description": "express nodeJs hbs模板",
"main": "app.js",
"dependencies": {
"amui-hbs-helper": "^2.2.0",
"body-parser": "^1.17.1",
"browser-sync": "^2.18.8",
"cookie-parser": "^1.4.3",
"express": "^4.15.2",
"express-session": "^1.15.2",
"fs": "0.0.1-security",
"gulp": "^3.9.1",
"gulp-clean": "^0.3.2",
"gulp-replace": "^0.5.4",
"gulp-replace-task": "^0.11.0",
"gulp-seajs-concat": "^1.0.5",
"gulp-seajs-transport": "^0.4.0",
"gulp-uglify": "^2.1.2",
"handlebars": "^4.0.8",
"hbs": "^4.0.1",
"jquery": "^3.2.1",
"merge-stream": "^1.0.1",
"multer": "^1.3.0",
"seajs": "^3.0.2",
"session": "^0.1.0",
"yargs": "^7.0.2"
  },
"devDependencies": {
"http": "0.0.0"
  },
"scripts": {
"注释":"npm run test以debug形式启动，另打开cmd命令node-inspector -p 8081 启动断点调试命令",
"test": "supervisor --debug app.js",
"dev": "node app.js"
  },
"keywords": [
"express",
"hbs"
  ],
"author": "qjh",
"license": "ISC"
}