var http=require('http')

var cheerio=require('cheerio')

var url='http://www.xianlaiwan.cn/learn/348'

function filterChapters(html){

var $=cheerio.load(html)

var chapters=$('.learnchapter')

// [{

// chapterTitle:'',

// videos:[

// title:'',

// id:''

// ]

// }]

//?

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,

videos:[]

}

videos.each(function(item){

var video=$(this).find('.studyvideo')

var videoTitle = video.text()

var id=video.attr('href').split('video/')[1]

// console.log('sssss')

chapterData.videos.push({

title:videoTitle,

id:id

})

})

courseData.push(chapterData)

})

return courseData

}

function printCourseInfo(courseData){

courseData.forEach(function(item){

var chapterTitle = item.chapterTitle

console.log(chapterTitle + '\n')

item.videos.forEach(function(video){

console.log(' 【' + videos.id + '】 ' + videos.title + '\n')

})

})

}

http.get(url,function(res){

var html=''

res.on('data',function(data){

html += data

})

res.on('end',function(){

var courseData = filterChapters(html)

printCourseInfo(courseData)

})

}).on('error',function(){

console.log('獲取出錯')

})