慕课网 下载视频

获取视频下载链接，使用方法：进入任意课程点击下载即可。如http://www.imooc.com/learn/814。github:https://github.com/Ahaochan/Tampermonkey，欢迎star和fork。

Stan na 30-04-2017. Zobacz najnowsza wersja.

// ==UserScript==
// @name        慕课网 下载视频
// @namespace   https://github.com/Ahaochan/Tampermonkey
// @version     0.2.3
// @description 获取视频下载链接，使用方法：进入任意课程点击下载即可。如http://www.imooc.com/learn/814。github:https://github.com/Ahaochan/Tampermonkey，欢迎star和fork。
// @author      Ahaochan
// @match       http://www.imooc.com/learn/*
// @match       https://www.imooc.com/learn/*
// @grant       GM_xmlhttpRequest
// @grant       GM_setClipboard
// @require     http://code.jquery.com/jquery-1.11.0.min.js
// ==/UserScript==

(function () {
    'use strict';
	
	
	/**--------------------------------获取下载链接---------------------------------------------*/
	var videoes = [];
	var $medias = $('.mod-chapters').find('a.J-media-item');
	var total = $medias.length;
	var len = total;	
	//添加提示标签
	$('.course-menu').append($('<li><a href="javascript:void(0)"><span id="downTip">视频解析中...</span></a></li>'));
	if(!isLogin){
		$('#downTip').text('视频下载异常，点击进行登录');
		$('#downTip').click(function(){
            var clickEvent  = document.createEvent ('MouseEvents');
            clickEvent.initEvent ('click', true, true);
            document.getElementById('js-signin-btn').dispatchEvent (clickEvent);
		});
		return;
	}
	//遍历获取下载链接
	$medias.each(function (key, value) {
		var vid = $(this).parent().attr('data-media-id');
		var name = $(this).text();
		var pattern = /\(\d\d:\d\d\)/;
		if (!pattern.test(name)) {
			total--;
			if (key == len - 1 && !total) {
				$('#downTip').text('无视频下载');
			}
			return;
		}
		name = name.replace(/\(\d{2}:\d{2}\)/, '').replace(/\s/g, '');
		//v2(vid, name, $(this));
		v3(vid, name, $(this));
	});
	/**--------------------------------获取下载链接---------------------------------------------*/
	/**--------------------------------视频下载解析接口-----------------------------------------*/
	/** 旧版接口，只能解析v1,v2 */
	function v2(vid, name, item){
		$.getJSON('/course/ajaxmediainfo/?mid=' + vid + '&mode=flash', function(response) {
			var url = response.data.result.mpath[0];
			parseVideo(vid, name, url, item);
		});
	}
	/** 新版接口，解析v1,v2,v3 */
	function v3(vid, name, item){
		GM_xmlhttpRequest({
			method: 'GET',
			url: 'http://m.imooc.com/video/'+vid,
			onload: function(response) {
				var pattern = /(http.+mp4)/;
				var url = response.responseText.match(pattern)[0];
				parseVideo(vid, name, url, item);
			}
		});
	}
	/**--------------------------------视频下载解析接口-----------------------------------------*/
	/**--------------------------------处理数据-------------------------------------------------*/
	function parseVideo(vid, name, url, item){
		var urlL = url.replace('H.mp4','M.mp4').replace('M.mp4','L.mp4');
		var urlM = url.replace('H.mp4','M.mp4').replace('L.mp4','M.mp4');
		var urlH = url.replace('L.mp4','M.mp4').replace('M.mp4','H.mp4');
		var video = {
			vid: vid,
			name: name,
			url: [ urlL, urlM, urlH ]
		};
		videoes.push(video);
		//添加单个下载链接
		var $link = $('<a href="'+video.url[clarityType]+'" style="position:absolute;right:100px;top:0;" target="_blank">下载</a>');
		$link.bind('DOMNodeInserted', function() {	$(this).find('i').remove();} );//移除子标签
		item.after($link);
		//添加全部下载链接
		if (videoes.length == total) {
			$('#downTip').text('视频下载(' + total + ')，已复制到剪贴板');
			videoes.sort(function(a,b){
				if(a.name>b.name)	return 1;
				else if(a.name<b.name) return -1;
				else return 0;
			});
			//显示
			$('#downloadBox').append($('<div style="margin-top:24px;">' +
				'<div style="border:1px solid #b7bbbf;box-sizing:border-box;border-radius:2px;">' +
					'<textarea id="downLoadArea" style="width:97%;min-height:100px;padding:8px;color:#555;resize:none;line-height:18px;"></textarea>' +
				'</div>')
				);
			textAreaChange();
		}
	}
	/**--------------------------------处理数据-------------------------------------------------*/
	
	/**--------------------------------导出设置-------------------------------------------------*/
	var clarityType = 2;
	var outTextType = 'idm';
	$('div.mod-tab-menu').after(
		$('<div id="downloadBox" class="course-brief">'+
			'<div style="float:left;margin-right:30px;">'+
				'<h4 style="font-weight:700;font-size: 16px;marginTop:10px">下载清晰度 : </h4>'+
				'<label for="lowClarity"   >普清(L)</label><input type="radio" id="lowClarity"    name="clarity" value="0" />'+
				'<label for="middleClarity">高清(M)</label><input type="radio" id="middleClarity" name="clarity" value="1" />'+
				'<label for="highClarity"  >超清(H)</label><input type="radio" id="highClarity"   name="clarity" value="2" checked="checked" />'+
			'</div>'+
			'<div>'+
				'<h4 style="font-weight:700;font-size: 16px;marginTop:10px">导出格式 : </h4>'+
				'<label for="rawOutText" >raw </label><input type="radio" id="rawOutText"  name="outText" value="raw"/>'+
				'<label for="idmOutText" >idm </label><input type="radio" id="idmOutText"  name="outText" value="idm" checked="checked" />'+
				'<label for="xmlOutText" >xml </label><input type="radio" id="xmlOutText"  name="outText" value="xml" />'+
				'<label for="jsomOutText">json</label><input type="radio" id="jsomOutText" name="outText" value="json"/><br/>'+
			'</div>'+
		'</div>')
	);
	$('input:radio').css('margin','auto 50px auto 3px');//设置单选框
	$('input:radio[name=clarity]').change(function() {  clarityType = this.value; 	textAreaChange();	});
	$('input:radio[name=outText]').change(function() {	outTextType = this.value;	textAreaChange();	});
	function textAreaChange(){
		var downloadTextArea = getTextLinks(clarityType,outTextType);
		GM_setClipboard(downloadTextArea);
		$('#downloadBox textarea').text(downloadTextArea);
	}
	/**--------------------------------导出设置-------------------------------------------------*/
	
	
	/**--------------------------------格式化下载链接用以显示---------------------------------*/
	function getTextLinks(clarityType, outTextType){
		if(outTextType === 'json')	return JSON.stringify(videoes);
		else {
			var str = '';
			for(var i in videoes) {
				if(outTextType === 'xml'){
					str += '\t<video>\n\t\t<url>' + videoes[i].url[clarityType] + '</url>\n\t\t<name>' + videoes[i].name + '</name>\n\t</video>\n';
				} else if(outTextType === 'raw'){
					str += videoes[i].url[clarityType]+'\n';
				} else {//idm
					str += 'filename='+videoes[i].name+'&fileurl='+videoes[i].url[clarityType]+'\n';
				}
			}
			if(outTextType === 'xml')   str = '<?xml version="1.0" encoding="utf-8" ?>\n<videoes>\n'+str+'</videoes>';
			return str;
		}
	}
	/**--------------------------------格式化下载链接用以显示---------------------------------*/
})();