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 = $('.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,
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({
id: id,
title: videoTitle
});
})
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('获取课程信息出错!')
})这是源码,不知道哪里出错了,代码就是不执行,不知道是因为cheerio安装问题还是代码问题,试了各种网上的方法都没用!!!
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