var express = require('express');

var app = express();

app.get('/',function(req,res){

    res.send('hello world');

});

var server = app.listen('3000',function(){

    var host = server.address().address;

    var port = server.address().port;

    console.log('server start localhost',host,port);

})

var express = require('express');

var app = express();

//http://localhost:3000/

app.get('/',function(req,res){

    res.send('hello world');

});

//http://localhost:3000/user.html

app.get('/user.html',function(req,res){

    res.sendFile(__dirname + '/' + 'user.html');

});

//http://localhost:3000/index.html

app.get('/index.html',function(req,res){

    res.sendFile(__dirname + '/' + 'index.html')

});

/*

 *其实每个路由对于着每个方法，把 req() => 请求的api 看懂

 *

 * 把 res(); => 的api  看会。就知道怎么和服务端交换啦。

 *

 * 当客户端发送AJAX请求的时候，其实就是方法的每个方法。

 *

 */

var server = app.listen('3000',function(){

    var host = server.address().address;

    var port = server.address().port;

    console.log('server start localhost',host,port);

})

var express = require('express');

var app = express();

//设置静态资源的位置

app.use(express.static('public'));

//http://localhost:3000/img/1.jpg

//public/img/1.jpg

var server = app.listen('3000',function(){

    var host = server.address().address;

    var port = server.address().port;

    console.log('server start localhost',host,port);

})

var express = require('express');

var app = express();

// 没有挂载路径的中间件，应用的每个请求都会执行该中间件

app.use(function(req,res,next){

    console.log('应用级中间件');

    console.log('time' + Date.now());

    next();

})

app.get('/',function(req,res){

    res.send('我是 根路径')

});

// 挂载至 /user/:id 的中间件，任何指向 /user/:id 的请求都会执行它

app.get('/user/:id',function(req,res,next){

    console.log('我是 user路由上面的子中间件');

    next();

});

app.get('/user/:id',function(req,res){

    var id = req.params.id;

    res.send(id);

});

app.get('/method/:id',function(req,res,next){

    console.log('methos路径的参数',req.params);

    next();

},function(req,res,next){

    console.log('methods路径的第二个参数',req.method)

    next();

})

app.get('/method/:id',function(req,res){

    var path = req.route;

    res.send(path);

});

var server = app.listen('3000',function(){

    var host = server.address().address;

    var port = server.address().port;

    console.log('server start localhost',host,port);

})

var express = require('express');

var router = express.Router();

var app = express();

router.use(function(req,res,next){

    console.log(req.path);

    next()

});

router.get('/user/:id',function(req,res,next){

    console.log(req.originalUrl);

    next();

})

router.get('/user/:id',function(req,res){

    res.send(req.params);

})

app.use('/',router)

var server = app.listen('8080',function(){

    console.log('start')

});

var express = require('express');

var app = express();

app.use(function(error,req,res,next){

    res.status('500').send('something error');

})

var server = app.listen('3000',function(){

    console.log('server start');

})

var express = require('express');

var app = express();

app.set('views','./views');

app.set('view engine','jade');

app.get('/',function(req,res){

    res.render('index',{title:'jade',message:'模板引擎'})

});

var server = app.listen('3000',function(req,res){

    console.log('server start');

})

html

  head

    title!= title

  body

    h1!= message