一、简单的单页面

var http = require('http') var url = 'http://www.imooc.com/learn/348' http.get(url,function(res){ 　　var html = ''    //有data触发时    res.on('data',function(data){        html += data    })    res.on('end',function(){        console.log(html)    })//出现异常时}).on('error',function(){    console.log('获取出错')})var server = http.createServer(function(req,res){        res.writeHead(200,{'Content-Type':'text/plain'})        res.end();    })server.listen(2017)

　　

运行结果

 

二、获取页面的课程列表

安装cheerio

cmd 执行命令 npm install  cheerio 然后就可以require cheerio

var http = require('http')var cheerio = require('cheerio')var url = 'http://www.imooc.com/learn/348' //过滤页面，获取到列表的名称与id等信息  与javascript方法一致function filterChapters(html){    var $ = cheerio.load(html)    // console.log($)    var chapters = $('.chapter')    var courseData = []    chapters.each(function (item) {        var chapter = $(this)        var chapterTitle = chapter.find('strong').text()        var videos = chapter.find('.video').children('li')        var chapterData = {            chapterTitle:chapterTitle,            video:[]        }        // console.log(videos + '24')        videos.each(function(item){            // var video = $(this).find('.studyvideo')            var videoTitle = $(this).text()            var id = $(this).attr("data-media-id")            chapterData.video.push({                title:videoTitle,                id:id            })        })        courseData.push(chapterData)    })    return courseData}//将获取到的信息打印出来function printCourseInfo(courseData) {    courseData.forEach(function(item){        var chapterTitle = item.chapterTitle        item.video.forEach(function(video){            console.log('【' +video.id+'】' +video.title +'\n')        })    })}http.get(url,function(res){    var html = ''    res.on('data',function(data){        html += data    })    res.on('end',function(){        //过滤页面信息        // console.log(html)        var courseData = filterChapters(html)        printCourseInfo(courseData)    })}).on('error',function(){    console.log('获取出错')})var server = http.createServer(function(req,res){        res.writeHead(200,{'Content-Type':'text/plain'})        res.end();    })server.listen(1337)

运行结果