// ==UserScript==// @name              Udemy下载助手（需配合Aria2使用）// @name:en           Udemy Downloader// @namespace         http://mofiter.com/// @version           0.3// @description       在 Udemy 上课程的课程内容页面添加下载按钮（可批量下载和单个视频下载），方便将视频下载到本地学习// @description:en    add button on udemy's course content to download videos// @author            mofiter// @require           https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js// @match             *://www.udemy.com/*/learn/v4/content// @grant             GM_getValue// @grant             GM_setValue// @grant             GM_xmlhttpRequest// @grant             GM_openInTab// ==/UserScript==(function() {'use strict';var $ = $ || window.$;var log_count = 1;var hasOpenAriac2Tab = false;var video_quality = "720"; //视频清晰度var aria2_url = "http://127.0.0.1:6800/jsonrpc"; //Aria2 地址var course_save_path = '/Users/mofiter/Downloads/study163'; //课程保存路径var mycourses_url = "https://www.udemy.com/api-2.0/users/me/subscribed-courses"; //已购所有课程的地址var curricuclum_url = "https://www.udemy.com/api-2.0/courses/{0}/cached-subscriber-curriculum-items/?page_size=9999"; //当前课程的地址var lesson_url = "https://www.udemy.com/api-2.0/assets/{0}?fields[asset]=@min,status,delayed_asset_message,time_estimation,stream_urls,captions,body&fields[caption]=@default,is_translation"; //一节课的地址var cookies = document.cookie;var match_cookie = cookies.match(/access_token=(\w+?);/);var authorization = "Bearer " + match_cookie[1];var mycourses_info;var current_course_url = location.pathname;var current_course_info = {'course_id':{},'course_name':{},'chapter_info':[]};var isExpand = false; //下载助手是否展开//自定义 log 函数function mylog(param1,param2){param1 = param1 ? param1 : "";param2 = param2 ? param2 : "";console.log("#" + log_count++ + "-UdemyDownloader-log:",param1,param2);}//javascript 字符串使用占位符轻松拼接String.prototype.format = function() {if(arguments.length == 0) return this;var param = arguments[0];var s = this;if(typeof(param) == 'object') {for(var key in param){s = s.replace(new RegExp("\\{" + key + "\\}", "g"), param[key]);}return s;} else {for(var i = 0; i < arguments.length; i++){s = s.replace(new RegExp("\\{" + i + "\\}", "g"), arguments[i]);}return s;}}setTimeout(function(){getCourseInfo();loadSetting();addDownloadAssistant();addDownloadButton();mylog("Udemy 下载助手加载完成 ~");},5000); //页面加载完成后延时5秒执行//获取视频信息function getCourseInfo(){$.ajax({url:mycourses_url,async:false,method:'GET',beforeSend:function(xhr){xhr.setRequestHeader('authorization',authorization);},success:function(response){mycourses_info = response.r###lts;}});$.each(mycourses_info,function(index,element){if (current_course_url.indexOf(element.url) > -1) {current_course_info.course_id = element.id;current_course_info.course_name = element.title.replace(/:|\?|\*|"|<|>|\|/g," ");return false;}});curricuclum_url = curricuclum_url.format(current_course_info.course_id);$.ajax({url:curricuclum_url,async:false,method:'GET',beforeSend:function(xhr){xhr.setRequestHeader('authorization',authorization);},success:function(response){var list = response.r###lts;list.push({'_class':'chapter','id':'useless','title':''});var chapter = {'chapter_id':'','chapter_name':{},'lecture_info':[]};var lecture_sn = 0;list.forEach(function(item,index){if(item._class == 'chapter'){if(chapter.chapter_id != ''){var data = JSON.parse(JSON.stringify(chapter));current_course_info.chapter_info.push(data);}if(item.id != 'useless'){chapter.chapter_id = item.id;chapter.chapter_name = item.title.replace(/:|\?|\*|"|<|>|\|/g," ");chapter.lecture_info = [];}}else if(item._class == 'lecture'){var lecture = {'lecture_sn':(++lecture_sn),'lecture_id':item.id,'lecture_name':item.title.replace(/:|\?|\*|"|<|>|\|/g," "),'lecture_asset':{'asset_id':item.asset.id,'asset_name':item.asset.title.replace(/:|\?|\*|"|<|>|\|/g," "),'asset_type':item.asset.asset_type}};chapter.lecture_info.push(lecture);}});mylog(current_course_info);}});}//添加下载助手按钮function addDownloadAssistant(){var download_assistant = $('<li ui-sref-active="active"></li>');var download_assistant_a = $('<a class="dropdown-toggle"><span class="mr5"><span>下载助手</span></span><i class="udi udi-caret-down"></i></a>');var assistant_content = $('<div id="assistant_content" style="display:none;z-index:999999;position:absolute;width:90px;background-color:#fff;border:1px solid #ddd;top:55px;padding:5px 10px;text-align:center;line-height:30px;"></div>');var batch_download = $('<a>批量下载</a>');var assistant_setting = $('<a>设置</a>');assistant_content.append(batch_download).append(assistant_setting);download_assistant.append(download_assistant_a).append(assistant_content);$('.nav-tabs').append(download_assistant);download_assistant.click(function(event){if(isExpand){isExpand = false;}else{isExpand = true;}assistant_content.toggle();event.stopPropagation();});$(document).click(function(){if(isExpand){assistant_content.hide();isExpand = false;}});batch_download.click(function(){loadSetting();if(course_save_path==""){alert("请到下载助手的设置里面填写文件保存位置");}else if(aria2_url==""){alert("请到下载助手的设置里面填写 Aria2 地址");}else{batchDownload();}});assistant_setting.click(function(){showSetting();});}//加载个人设置function loadSetting(){video_quality = GM_getValue('video_quality', '720');aria2_url = GM_getValue('aria2_url','http://127.0.0.1:6800/jsonrpc');course_save_path = GM_getValue('course_save_path','');}//打开设置function showSetting(){if(document.querySelector('#dl-setting') == null){var container = document.createElement("div");container.id = "dl-setting";container.style = "position:fixed;z-index:999999;top:10%;right:2%;width:270px;background-color:#eee;padding:5px 10px;font-size:14px;border:1px solid;";container.innerHTML ="<div style='line-height:25px;'>" +"<div style='text-align:center;font-size:16px;'>下载助手设置</div>" +"<ul>" +"<li>Aria2 地址：</li>" +"<li><input type='text' id='aria2_url' name='aria2_url' value='" + aria2_url + "' style='width:100%'></input></li>" +"<li>文件保存位置：</li>" +"<li><input type='text' id='save_path' name='save_path' value='" + course_save_path + "' style='width:100%'></input></li>" +"<li>清晰度：</li>" +"<li><label title='720P'><input id='video-quality-1' name='video-quality' value='720' type='radio' style='margin:0 5px;'" + (video_quality=="720" ? "checked":"") + "></input>720P</label>" +"<label title='480P' style='padding:0 5px;'><input id='video-quality-2' name='video-quality' value='480' type='radio' style='margin:0 5px;'" + (video_quality=="480" ? "checked":"") + "></input>480P</label>" +"<label title='360P' style='padding:0 5px;'><input id='video-quality-3' name='video-quality' value='360' type='radio' style='margin:0 5px;'" + (video_quality=="360" ? "checked":"") + "></input>360P</label>" +"<label title='144P' style='padding:0 5px;'><input id='video-quality-4' name='video-quality' value='144' type='radio' style='margin:0 5px;'" + (video_quality=="144" ? "checked":"") + "></input>144P</label></li>" +"</ul>\n" +"<input type='button' value='取消' id='cancel_button' style='position:relative;float:left;border:1px solid;padding:0 4px;'></input>\n" +"<input type='button' value='保存' id='save_button' style='position:relative;float:right;border:1px solid;padding:0 4px;'></input>\n" +"</div>";document.body.appendChild(container);}else{loadSetting();if(video_quality=="720"){$('#video-quality-1').prop('checked',true);}else if(video_quality=="480"){$('#video-quality-2').prop('checked',true);}else if(video_quality=="360"){$('#video-quality-3').prop('checked',true);}else if(video_quality=="144"){$('#video-quality-4').prop('checked',true);}$('#aria2_url').value = aria2_url;$('#save_path').value = course_save_path;$('#dl-setting').show();}$('#save_button').click(function(){GM_setValue('video_quality',$('input[name="video-quality"]:checked').val());GM_setValue('aria2_url',$('input[name="aria2_url"]').val());GM_setValue('course_save_path',$('input[name="save_path"]').val());$('#dl-setting').hide();});$('#cancel_button').click(function(){$('#dl-setting').hide();});}//批量下载function batchDownload(){current_course_info.chapter_info.forEach(function(chapter,index){chapter.lecture_info.forEach(function(lecture){if(lecture.lecture_asset.asset_type == 'Video'){var file_name = lecture.lecture_sn + '.' + lecture.lecture_name;var save_path = course_save_path.replace(/\\/g,'\/') + '/' + current_course_info.course_name + '/' + (index + 1) + '.' + current_course_info.chapter_info[index].chapter_name;var real_lesson_url = lesson_url.format(lecture.lecture_asset.asset_id);getVideoUrl(real_lesson_url,file_name + '.mp4',save_path);}});});}//添加下载按钮function addDownloadButton(){var li_items = $('div.section--section--CIk7q li.curriculum-item--curriculum-item--iJwX5');$.each(li_items,function(index,element){if (element.firstChild.childNodes[2].innerHTML == '') {element.firstChild.style.paddingRight = "70px";return true;}var download_button = document.createElement('span');download_button.className = 'download-button';download_button.innerHTML = '下载';download_button.style.order = 5;download_button.style.marginLeft = '20px';(element.firstChild).append(download_button);});$('.download-button').each(function(){$(this).click(function(event){loadSetting();if(course_save_path==""){alert("请到下载助手的设置里面填写文件保存位置");}else if(aria2_url==""){alert("请到下载助手的设置里面填写 Aria2 地址");}else{var chapter_index = $(this).parents('.section--section--CIk7q').index();var lecture_index = $(this).parents('.curriculum-item--curriculum-item--iJwX5').index();var lecture = current_course_info.chapter_info[chapter_index].lecture_info[lecture_index];mylog("选择的课为【lecture_name:" + lecture.lecture_name + ",lecture_id:" + lecture.lecture_id + '】');var file_name = lecture.lecture_sn + '.' + lecture.lecture_name;var save_path = course_save_path.replace(/\\/g,'\/') + '/' + current_course_info.course_name + '/' + (chapter_index + 1) + '.' + current_course_info.chapter_info[chapter_index].chapter_name;var real_lesson_url = lesson_url.format(lecture.lecture_asset.asset_id);var url = 'https://www.udemy.com/vuejs-app/learn/v4/t/lecture/{0}?start=0'.format(lecture.lecture_id);getVideoUrl(real_lesson_url,file_name + '.mp4',save_path);}event.stopPropagation();});});}//获取视频下载地址function getVideoUrl(url,file_name,save_path){$.ajax({url:url,async:true,method:'GET',beforeSend:function(xhr){xhr.setRequestHeader('authorization',authorization);},success:function(response){var video_urls = response.stream_urls.Video;video_urls.forEach(function(value){if (value.label == video_quality){//mylog(value.file);sendDownloadTaskToAria2(value.file,file_name,save_path);}});}});}// 将下载链接发送到 Aria2 下载function sendDownloadTaskToAria2(download_url,file_name,save_path){var json_rpc = {id:'',jsonrpc:'2.0',method:'aria2.addUri',params:[[download_url],{dir:save_path,out:file_name}]};GM_xmlhttpRequest({url:aria2_url,method:'POST',data:JSON.stringify(json_rpc),onerror:function(response){mylog(response);},onload:function(response){mylog(response);if (!hasOpenAriac2Tab){GM_openInTab('http://aria2c.com/',{active:true});hasOpenAriac2Tab = true;}}});}})();