使用cheerio模块######
npm install cheerio
CODE:####
var http = require('http')
var cheerio = require('cheerio')
var url = 'http://www.imooc.com/learn/344'
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({
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！')
})