相关都改了,报错html???求解
var http = require('http');
var cheerio = require('cheerio');
var url = 'http://www.imooc.com/learn/348';
function filterChapters(){
var $ = cheerio.load(html);
var chapters = $('.chapter');
var courseData = [];
chapters.each(function(item){
var chapter = $(this);
var chapterTitle = chapter.find('h3').text();
var videos = chapter.find('.video').children('li');
var chapterData = {
chapterTitle:chapterTitle,
videos:[]
}
videos.each(function(item){
var video = $(this).find('.J-media-item')
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!');
})