为什么我的什么也没输出
var http = require('http')
var cheerio = require('cheerio')
var url = 'http://www.imooc.com/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('.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];
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('['+video.id+']'+video.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('获取课程数据出错');
})
