//依赖一个http模块，相当于java中的import，与C#中的usingvar http = require('http');//创建一个服务器对象server = http.createServer(function (req, res) {//设置请求成功时响应头部的MIME为纯文本res.writeHeader(200, {"Content-Type": "text/plain"});//向客户端输出字符res.end("Hello World\n");});//让服务器监听本地8000端口开始运行server.listen(8000,'127.0.0.1');console.log("server is runing at 127.0.0.1:8000");

alias cnpm="npm --registry=https://registry.npm.taobao.org \--cache=$HOME/.npm/.cache/cnpm \--disturl=https://npm.taobao.org/dist \--userconfig=$HOME/.cnpmrc"# Or alias it in .bashrc or .zshrc$ echo '\n#alias for cnpm\nalias cnpm="npm --registry=https://registry.npm.taobao.org \  --cache=$HOME/.npm/.cache/cnpm \  --disturl=https://npm.taobao.org/dist \  --userconfig=$HOME/.cnpmrc"' >> ~/.zshrc && source ~/.zshrc

{  "name" : "xxx",  "version" : "0.0.0",}

{    "name": "Hello World",    "version": "0.0.1",    "author": "张三",    "description": "第一个node.js程序",    "keywords":["node.js","javascript"],    "repository": {        "type": "git",        "url": "https://path/to/url"    },    "license":"MIT",    "engines": {"node": "0.10.x"},    "bugs":{"url":"http://path/to/bug","email":"bug@example.com"},    "contributors":[{"name":"李四","email":"lisi@example.com"}],    "scripts": {        "start": "node index.js"    },    "dependencies": {        "express": "latest",        "mongoose": "~3.8.3",        "handlebars-runtime": "~1.0.12",        "express3-handlebars": "~0.5.0",        "MD5": "~1.2.0"    },    "devDependencies": {        "bower": "~1.2.8",        "grunt": "~0.4.1",        "grunt-contrib-concat": "~0.3.0",        "grunt-contrib-jshint": "~0.7.2",        "grunt-contrib-uglify": "~0.2.7",        "grunt-contrib-clean": "~0.5.0",        "browserify": "2.36.1",        "grunt-browserify": "~1.3.0",    }}

"scripts": {    "preinstall": "echo here it comes!",    "postinstall": "echo there it goes!",    "start": "node index.js",    "test": "tap test/*.js"}

{  "devDependencies": {    "browserify": "~13.0.0",    "karma-browserify": "~5.0.1"  }}

$ npm init

$ npm install

$ npm install express --save$ npm install express --save-dev

{  "name": "demo001",  "version": "1.1.2",  "description": "vueclidemo",  "main": "index.js",  "scripts": {    "test": "echo \"Error: no test specified\" && exit 1",    "start": "node index.js"  },  "keywords": [    "vue",    "vue-cli"  ],  "author": "zhangguo",  "license": "MIT",  "repository": {    "type": "git",    "url": "https://git.dev.tencent.com/zhangguo5/vuedemo001.git"  },  "dependencies": {    "md5": "^2.2.1"  },  "devDependencies": {    "lodash": "^4.17.15"  }}

var md5=require("md5");var _=require("lodash");function Cat(){    console.log(md5("Hello Cat!"));}Cat();var users = [    { 'user': 'fred',   'age': 48 },    { 'user': 'barney', 'age': 36 },    { 'user': 'fred',   'age': 40 },    { 'user': 'barney', 'age': 34 }  ]; var result=_.sortBy(users,['user','age']); console.log(result);

{  "name": "chai-as-promised",  "peerDependencies": {    "chai": "1.x"  }}

"bin": {  "someTool": "./bin/someTool.js"}

scripts: {    start: './node_modules/someTool/someTool.js build'}// 简写为scripts: {    start: 'someTool build'}

{  "name" : "foo",  "config" : { "port" : "8080" },  "scripts" : { "start" : "node server.js" }}

http  .createServer(...)  .listen(process.env.npm_package_config_port)

$ npm run start

$ npm config set foo:port 80

"browser": {  "tipso": "./node_modules/tipso/src/tipso.js"},

{ "engines" : { "node" : ">=0.10.3 <0.12" } }

{ "engines" : { "npm" : "~1.0.20" } }

"man" :[ "./doc/calc.1" ]

"style": [  "./node_modules/tipso/src/tipso.css"]

//引入express模块var express = require('express');//创建一个app对象，类似一个web 应用（网站）var app = express();//接受指定路径的请求，指定回调函数app.get('/', function (req, res){res.send('Hello World');});//创建一个web服务器，可以认为就是web服务器对象//监听8081端口，当监听成功时回调var server = app.listen(8081, function () {   var host = server.address().address;  //地址   var port = server.address().port;  //端口    console.log("应用实例，访问地址为 http://%s:%s", host, port);});})

var express = require('express');var path = require('path');var favicon = require('serve-favicon');var logger = require('morgan');var cookieParser = require('cookie-parser');var bodyParser = require('body-parser');var index = require('./routes/index');var users = require('./routes/users');var app = express();//指定视图引擎为ejsapp.set('views', path.join(__dirname, 'views'));app.set('view engine', 'ejs');// uncomment after placing your favicon in /public//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));app.use(logger('dev'));app.use(bodyParser.json());app.use(bodyParser.urlencoded({ extended: false }));app.use(cookieParser());app.use(express.static(path.join(__dirname, 'public')));app.use('/', index);app.use('/users', users);// catch 404 and forward to error handlerapp.use(function(req, res, next) {  var err = new Error('Not Found');  err.status = 404;  next(err);});// error handlerapp.use(function(err, req, res, next) {  // set locals, only providing error in development  res.locals.message = err.message;  res.locals.error = req.app.get('env') === 'development' ? err : {};  // render the error page  res.status(err.status || 500);  res.render('error');});module.exports = app;

#!/usr/bin/env node/** * 依赖模块，导入 */var app = require('../app');var debug = require('debug')('nodejsexpress:server');var http = require('http');/** * 从上下文环境中获得监听端口，如果空则3000 */var port = normalizePort(process.env.PORT || '3000');app.set('port', port);/** * 创建Web服务器 */var server = http.createServer(app);/** * 开始监听 */server.listen(port);server.on('error', onError);  //指定发生错误时的事件server.on('listening', onListening);  //当监听成功时的回调/** * 规范化端口 */function normalizePort(val) {  var port = parseInt(val, 10);  if (isNaN(port)) {    // named pipe    return val;  }  if (port >= 0) {    // port number    return port;  }  return false;}/** *错误事件监听 */function onError(error) {  if (error.syscall !== 'listen') {    throw error;  }  var bind = typeof port === 'string'    ? 'Pipe ' + port    : 'Port ' + port;  //错误处理  switch (error.code) {    case 'EACCES':      console.error(bind + ' requires elevated privileges');      process.exit(1);  //结束程序      break;    case 'EADDRINUSE':      console.error(bind + ' is already in use');      process.exit(1);      break;    default:      throw error;  }}/** * 当用户访问服务器成功时的回调 */function onListening() {  var addr = server.address();  var bind = typeof addr === 'string'    ? 'pipe ' + addr    : 'port ' + addr.port;  debug('Listening on ' + bind);}

var express = require('express');var router = express.Router();/* 获得首页 */router.get('/', function(req, res, next) {  res.render('index', { title: 'Express' });});module.exports = router;

          
              
<%= title %>
    
Welcome to <%= title %>
  

req.app：当callback为外部文件时，用req.app访问express的实例req.baseUrl：获取路由当前安装的URL路径req.body / req.cookies：获得「请求主体」/ Cookiesreq.fresh / req.stale：判断请求是否还「新鲜」req.hostname / req.ip：获取主机名和IP地址req.originalUrl：获取原始请求URLreq.params：获取路由的parametersreq.path：获取请求路径req.protocol：获取协议类型req.query：获取URL的查询参数串req.route：获取当前匹配的路由req.subdomains：获取子域名req.accepts()：检查可接受的请求的文档类型req.acceptsCharsets / req.acceptsEncodings / req.acceptsLanguages：返回指定字符集的第一个可接受字符编码req.get()：获取指定的HTTP请求头req.is()：判断请求头Content-Type的MIME类型

res.app：同req.app一样res.append()：追加指定HTTP头res.set()在res.append()后将重置之前设置的头res.cookie(name，value [，option])：设置Cookieopition: domain / expires / httpOnly / maxAge / path / secure / signedres.clearCookie()：清除Cookieres.download()：传送指定路径的文件res.get()：返回指定的HTTP头res.json()：传送JSON响应res.jsonp()：传送JSONP响应res.location()：只设置响应的Location HTTP头，不设置状态码或者close responseres.redirect()：设置响应的Location HTTP头，并且设置状态码302res.render(view,[locals],callback)：渲染一个view，同时向callback传递渲染后的字符串，如果在渲染过程中有错误发生next(err)将会被自动调用。callback将会被传入一个可能发生的错误以及渲染后的页面，这样就不会自动输出了。res.send()：传送HTTP响应res.sendFile(path [，options] [，fn])：传送指定路径的文件 -会自动根据文件extension设定Content-Typeres.set()：设置HTTP头，传入object可以一次设置多个头res.status()：设置HTTP状态码res.type()：设置Content-Type的MIME类型

var num = req.query.num;res.send("你获取的get数据为:" + num);

npm install body-parser --save

var express = require('express');var app = express();//引入body-parservar bodyParser = require('body-parser');app.use(express.static('public'));//需要use的app.use(bodyParser.json()); // for parsing application/jsonapp.use(bodyParser.urlencoded({extended: true})); // for parsing application/x-www-form-urlencoded//获取数据app.post('/form', function(req, res) {var num = req.body.num;res.send("你获取的post数据为:" + num);});//设置监听端口app.listen(3000);

var express = require('express');var app = express();//获取数据app.get('/form/:num', function(req, res) {var num = req.params.num;res.send("你获取到form/后的参数:" + num);});//设置监听端口app.listen(3000);

var express = require('express');var router = express.Router();/* 产品 */router.get('/', function(req, res, next) {      var products=[];  products.push({name:"ZTE U880",price:899.8});  products.push({name:"HuWei 荣耀8",price:1899.8});  products.push({name:"iPhone 7 Plus 128G",price:5899.8});    //将product视图与指定的对象渲染后输出到客户端  res.render('product', { title: '天狗商城', pdts:products});});module.exports = router;

                    
                      
<%= title %> - 产品列表
        
      
            <%pdts.forEach(function(pdt,index){%>            
            <%});%>        
                   
        
                         
序号
                         
名称
                         
价格
                    
        
                         
                    <%=index+1%>                
                         
                    <%=pdt.name%>                
                         
                    <%=pdt.price%>                
                    
       
      
        
      
                   <% for(var i=0; i
                   
        
                <%=pdts[i].name%>            
            <% } %>    
       
      

var index = require('./routes/index');var users = require('./routes/users');var pdts = require('./routes/product');var app = express();//指定视图引擎为ejsapp.set('views', path.join(__dirname, 'views'));app.set('view engine', 'ejs');// uncomment after placing your favicon in /public//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));app.use(logger('dev'));app.use(bodyParser.json());app.use(bodyParser.urlencoded({ extended: false }));app.use(cookieParser());app.use(express.static(path.join(__dirname, 'public')));app.use('/', index);app.use('/users', users);app.use('/pdt', pdts);

//导入lodash模块var _= require('lodash');var products=[];products.push({name:"ZTE U880",price:899.8});products.push({name:"HuWei 荣耀8",price:1899.8});products.push({name:"iPhone 7 Plus 128G",price:5899.8});//1、取出第一个元素var obj1=_.first(products);console.log(obj1.name);  //ZTE U880//2、取出最后一个元素var obj2=_.last(products);console.log(obj2.name);  //iPhone 7 Plus 128G//3、指定查找条件返回符合条件的索引var obj3=_.findIndex(products,function(obj){    return obj.price>=1000&&obj.name.indexOf("7")>0;});console.log(obj3);  //2//4、指定查找条件返回查找到的对象var obj4=_.find(products,function(obj){    return obj.price>=1000&&obj.name.indexOf("7")>0;});console.log(obj4);  //{ name: 'iPhone 7 Plus 128G', price: 5899.8 }//5、排序var obj5=_.orderBy(products,["price","name"],["desc","asc"]);console.log(obj5); //[ { name: 'iPhone 7 Plus 128G', price: 5899.8 },//{ name: 'HuWei 荣耀8', price: 1899.8 },//{ name: 'ZTE U880', price: 899.8 } ]//6、查找价格为1899.8的产品的keyvar obj6=_.findKey(products,{price:1899.8});console.log(obj6);   //1

//获得产品根据Idrouter.get('/:id/:category',function(request,res,next){    res.send(request.params.id+","+request.params.category);});

router.get('/:id',function(request,res,next){    res.send("name:"+request.query.name);});

router.post('/add',function(request,res,next){    var entity={name:request.body.name,price:request.body.price};    products.push(entity);      //将product视图与指定的对象渲染后输出到客户端      res.render('product', { title: '天狗商城', pdts:products,msg:"添加成功"});});

//对象            var rose={"name":"Rose","weight":"65"};            //序列化成字符串            var str=JSON.stringify(rose);            alert(str);

//将字符串转换成JavaScript对象            var markStr='{"name":"mark","weight":"188"}';            var mark=JSON.parse(markStr);            alert(mark.name+"，"+mark.weight);

/* 产品 */router.get('/rest', function(req, res, next) {  res.json(products);});

var express = require('express');var router = express.Router();var _= require('lodash');var cars=[];cars.push({id:201701,name:"BMW",price:190,speed:"210km/h",color:"白色"});cars.push({id:201702,name:"BYD",price:25,speed:"160km/h",color:"红色"});cars.push({id:201703,name:"Benz",price:300,speed:"215km/h",color:"蓝色"});cars.push({id:201704,name:"Honda",price:190,speed:"170km/h",color:"黑色"});cars.push({id:201705,name:"QQ",price:130,speed:"210km/h",color:"白色"});/* Get *//*获得所有汽车*//*url /cars/*/router.get('/', function(req, res, next) {    res.json(cars);});/*Get*//*获得汽车通过id*//*url：/cars/:id  */router.get('/:id', function(req, res, next) {     //从路径中映射参数，转换成数字      var id=parseInt(req.params.id);      var car=_.find(cars,{id:id});      res.json(car);});/*Post*//*添加汽车*//*url：/cars/car  */router.post('/car', function(req, res, next) {      var car=req.body;  //从请求正文中获得json对象      car.id=_.last(cars).id+1;  //将编号修改为最后一辆车的编号+1      cars.push(car);  //将汽车对象添加到集合中      res.json(car);  //将添加成功的车以json的形式返回});/*Put*//*修改汽车*//*url：/cars/car  */router.put('/car', function(req, res, next) {      var car=req.body;  //从请求正文中获得json对象      console.log(req.body);      var index=_.findIndex(cars,{id:parseInt(car.id)});  //根据id获得车在集合中的下标            cars[index]=car;  //替换原对象      //res.json(car);  //将修改后的车以json的形式返回      res.send({status:"success", message:"更新成功!"});  });/*Delete*//*删除汽车*//*url：/cars/:id  */router.delete('/id/:id', function(req, res, next) {      //获得url中的编号参数      var id=parseInt(req.params.id);      var index=_.findIndex(cars,{id:id});  //根据id获得车在集合中的下标      cars.splice(index,1);   //在cars数组中删除下标从index开始的1条数据      res.send({status:"success", message:"删除成功!"});  });module.exports = router;

var express = require('express');var path = require('path');var favicon = require('serve-favicon');var logger = require('morgan');var cookieParser = require('cookie-parser');var bodyParser = require('body-parser');var index = require('./routes/index');var users = require('./routes/users');var pdts = require('./routes/product');var task = require('./routes/task');var cars = require('./routes/cars');var app = express();//指定视图引擎为ejsapp.set('views', path.join(__dirname, 'views'));app.set('view engine', 'ejs');// uncomment after placing your favicon in /public//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));app.use(logger('dev'));app.use(bodyParser.json());app.use(bodyParser.urlencoded({ extended: false }));app.use(cookieParser());app.use(express.static(path.join(__dirname, 'public')));app.use('/', index);app.use('/users', users);app.use('/pdt', pdts);app.use("/task",task);app.use("/cars",cars);// catch 404 and forward to error handlerapp.use(function(req, res, next) {  var err = new Error('Not Found');  err.status = 404;  next(err);});// error handlerapp.use(function(err, req, res, next) {  // set locals, only providing error in development  res.locals.message = err.message;  res.locals.error = req.app.get('env') === 'development' ? err : {};  // render the error page  res.status(err.status || 500);  res.render('error');});module.exports = app;

app.use(logger('dev'));app.use(bodyParser.json());app.use(bodyParser.urlencoded({ extended: false }));app.use(cookieParser());app.use(express.static(path.join(__dirname, 'public')));app.all('*', function(req, res, next) {    res.header("Access-Control-Allow-Origin", "*");    res.header("Access-Control-Allow-Headers", "content-type");    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");    res.header("X-Powered-By", ' 3.2.1');    res.header("Content-Type", "application/json;charset=utf-8");    if(req.method == "OPTIONS") {        res.send("200");    } else {        next();    }});