var?http=require('http')
var?cheerio=require('cheerio')
var?url?=?'http://www.xianlaiwan.cn/learn/348'

var?filterChapter=function(data){
????var?$?=?cheerio.load(data)
????var?chapters=$('.chapter')
????var?courseData?=?[]

????chapters.each(function(item){
???????var?chapter=$(this)
???????chapterTitle=chapter.find("strong").text()
???????videos=chapter.find("li")
???????var?chapterData={
????????chapterTitle:chapterTitle,
????????videos:[]
???????}
???????videos.each(function(item){
????????var?video=$(this)
????????var?videoTitle=video.find(".J-media-item").text()
????????var?id?=?video.find(".J-media-item").attr("href").split("video/")[1]
????????
????????chapterData.videos.push({
????????????videoTitle: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(it){
????????????var?videoTitle=?it.videoTitle
????????????var?videoid=it.id
????????????console.log(videoTitle+"?"+videoid+"\n")
????????})

????})
}
http.get(url,function(res){
????var?html?=?''
????res.on('data',function(data){
????????html?+=?data
????})
????res.on('end',function(){
????????var?courseData?=?filterChapter(html)
????????printcourseinfo(courseData)
????})
}).on('error',function(){
????console.log('獲取課程數據')
})