// ==UserScript==// @name              网易云课堂下载助手（需配合Aria2使用）// @name:en           Study163 Downloader// @namespace         http://mofiter.com/// @version           0.7// @description       在网易云课堂的课程目录页面添加下载助手按钮（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 download button on study.163.com to download videos// @author            mofiter// @require           https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js// @match             *://study.163.com/course/courseMain.htm?courseId=*// @grant             unsafeWindow// @grant             GM_getValue// @grant             GM_setValue// @grant             GM_xmlhttpRequest// @grant             GM_openInTab// ==/UserScript==(function() {'use strict';var $ = window.$;var log_count = 1;var hasOpenAriac2Tab = false;var video_quality = 2; //视频清晰度var video_format = 'mp4'; //视频格式var video_file_name; //视频文件名称var aria2_url = "http://127.0.0.1:6800/jsonrpc"; //Aria2 地址var course_save_path = '/Users/mofiter/Downloads/study163'; //课程保存路径var video_save_path; //每个视频保存路径var video_download_url = ""; //视频下载地址var course_info = {'course_id': {},'course_name': {},'chapter_info': [],'course_price': {},'course_duration': {}}; //课程信息var cookies = document.cookie;var match_cookie = cookies.match(/NTESSTUDYSI=(\w+)/)[1];//自定义 log 函数function mylog(param1,param2){param1 = param1 ? param1 : "";param2 = param2 ? param2 : "";console.log("#" + log_count++ + "-Study163Downloader-log:",param1,param2);}setTimeout(function(){if(!getCourseInfo()){return;}loadSetting();addDownloadAssistant();addDownloadButton();mylog("网易云课堂下载助手加载完成~");},5000); //页面加载完成后延时5秒执行//加载个人设置function loadSetting(){video_quality = GM_getValue('video_quality', 2);video_format = GM_getValue('video_format','mp4');aria2_url = GM_getValue('aria2_url','http://127.0.0.1:6800/jsonrpc');course_save_path = GM_getValue('course_save_path','');}//添加下载助手按钮function addDownloadAssistant(){$(".u-navsearchUI").css("width","224px");var download_assistant_div = $("<div class='m-nav_item' style='margin-left:24px;'></div>");var download_assistant = $("<span>下载助手</span>");var assistant_div = $("<div class='f-pa' style='line-height:40px;display:none;left:0px;top:60px;width:auto;height:auto;background-color:#fff;color:#666;border:1px solid #ddd;padding:0 10px;text-align:center;'><div class='arrr f-pa' style='background:url(//s.stu.126.net/res/images/ui/ui_new_yktnav_sprite.png) 9999px 9999px no-repeat;top:-9px;left:40px;width:14px;height:9px;background-position:-187px 0;'></div></div>");var batch_download = $("<a style='width:50%;float:left;'>批量下载</a>");var assistant_setting = $("<a style='width:50%;float:right;'>设置</a>");var recommendation = $("<img width='300px' src='https://qcloud.coding.net/u/mofiter/p/public_files/git/raw/master/recommendation.png'>");assistant_div.append(batch_download).append(assistant_setting).append(recommendation);download_assistant_div.append(download_assistant).append(assistant_div);$('.m-nav').append(download_assistant_div);download_assistant_div.mouseover(function(){assistant_div.show();});download_assistant_div.mouseout(function(){assistant_div.hide();});batch_download.click(function(){assistant_div.hide();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(){assistant_div.hide();showSetting();});}//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:30%;left:45%;width:auto;height:auto;background-color:#eee;padding:5px 10px;font-size:14px;border:1px solid;";container.innerHTML ="<div style='line-height:25px;'>" +"<legend style='text-align:center;'>下载助手设置</legend>" +"<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>\n" +"<li><input type='text' id='save_path' name='save_path' value='" + course_save_path + "' style='width:100%'></input></li>" +"<li>清晰度：<label title='高清'><input id='video-quality-2' name='video-quality' value='2' type='radio' style='margin:0 5px;'" + (video_quality==2 ? "checked":"") + "></input>高清</label>\n" +"<label title='标清' style='padding:0 5px;'><input id='video-quality-1' name='video-quality' value='1' type='radio' style='margin:0 5px;'" + (video_quality==1 ? "checked":"") + "></input>标清</label></li>\n" +"<li>格式：<label title='mp4' style='padding:0 0 0 14px;'><input id='video-format-mp4' name='video-format' value='mp4' type='radio' style='margin:0 5px;'" + (video_format=='mp4' ? "checked":"") + "></input>mp4</label>" +"<label title='flv' style='padding:0 5px;'><input id='video-format-flv' name='video-format' value='flv' type='radio' style='margin:0 5px 0 10px;'" + (video_format=='flv' ? "checked":"") + "></input>flv</label></li>" +"</ul>\n" +"<input type='button' value='取消' id='cancel_button' style='position:relative;float:left;border:1px solid #ccc;padding:0 2px;'></input>\n" +"<input type='button' value='保存' id='save_button' style='position:relative;float:right;border:1px solid #ccc;padding:0 2px;'></input>\n" +"</div>";document.body.appendChild(container);}else{loadSetting();if(video_quality==2){$('#video-quality-2').prop('checked',true);}else{$('#video-quality-1').prop('checked',true);}if(video_format=='mp4'){$('#video-format-mp4').prop('checked',true);}else{$('#video-format-flv').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',$('input[name="video-quality"]:checked').val());GM_setValue('video_format',$('input[name="video-format"]: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();});}//获取课程信息function getCourseInfo(){var courseVo = unsafeWindow.courseVo;mylog(courseVo);course_info.course_id = courseVo.id; //课程 idcourse_info.course_name = courseVo.name.replace(/:|\?|\*|"|<|>|\|/g," "); //课程名称course_info.course_price = courseVo.price; //课程价格var chapter = courseVo.chapterDtos; //课程章节var allSeconds = 0; //课程总时长，单位为秒chapter.forEach(function(val,index){var chapter = {'chapter_id': val.id,'chapter_name': val.name.replace(/:|\?|\*|"|<|>|\|/g," "),'lesson_info': []}; //章节信息var lessonDtos = val.lessonDtos;lessonDtos.forEach(function(val,index){var lesson = {'keshi':val.ksstr,'lesson_id':val.id,'lesson_name':val.lessonName.replace(/:|\?|\*|"|<|>|\|/g," "),'lesson_type':val.lessonType}; //课时信息if(val.videoTime){var videoTime = val.videoTime.split(':');if(videoTime.length == 3){allSeconds += parseInt(videoTime[0]) * 3600 + parseInt(videoTime[1]) * 60 + parseInt(videoTime[2]);}else if(videoTime.length == 2){allSeconds += parseInt(videoTime[0]) * 60 + parseInt(videoTime[1]);}else if(videoTime.length == 1){allSeconds += parseInt(videoTime[0]);}}chapter.lesson_info.push(lesson);});course_info.chapter_info.push(chapter);});var formatTime = {'hour':0,'minute':0,'second':0};formatTime.hour = parseInt(allSeconds/3600);formatTime.minute = parseInt(allSeconds%3600/60);formatTime.second = parseInt(allSeconds%3600%60);if(formatTime.hour){course_info.course_duration = formatTime.hour + "小时" + formatTime.minute + "分" + formatTime.second + "秒";}else if(formatTime.minute){course_info.course_duration = formatTime.minute + "分" + formatTime.second + "秒";}else if(formatTime.second){course_info.course_duration = formatTime.second + "秒";}mylog(course_info);if(course_info.course_price > 0){return false;}else{return true;}}//批量下载function batchDownload(){course_info.chapter_info.forEach(function(chapter,index){chapter.lesson_info.forEach(function(lesson){var file_name = lesson.keshi + '_' + lesson.lesson_name;var save_path = course_save_path.replace(/\\/g,'\/') + '/' + course_info.course_name + '/章节' + (index + 1) + '_' + chapter.chapter_name;if(lesson.lesson_type=="3"){getTextLearnInfo(lesson,file_name,save_path);}else{getVideoLearnInfo(lesson,file_name,save_path);}});});}// 添加下载按钮function addDownloadButton(){var ksbtn = document.getElementsByClassName('ksbtn')[0];var ksbtn_style = 'display:' + getStyle(ksbtn,'display') + ';width:' + getStyle(ksbtn,'width') + ';background-position:' + getStyle(ksbtn,'background-position') + ';margin-top:' + getStyle(ksbtn,'margin-top') + ';';var ksbtn_span = ksbtn.firstChild;var ksbtn_span_style = 'display:' + getStyle(ksbtn_span,'display') + ';text-align:' + getStyle(ksbtn_span,'text-align') + ';background:' + getStyle(ksbtn_span,'background') +';width:' + getStyle(ksbtn_span,'width') + ';font-size:' + getStyle(ksbtn_span,'font-size') + ';height:' + getStyle(ksbtn_span,'height') + ';line-height:' +getStyle(ksbtn_span,'line-height') + ';color:' + getStyle(ksbtn_span,'color') + ';background-position:' + getStyle(ksbtn_span,'background-position') + ';';var allNodes = document.getElementsByClassName("section");for (var i = 0;i < allNodes.length;i ++) {var download_button = document.createElement("a");var style = 'display:block;text-align:center;padding-left:10px;width:58px;font-size:12px;height:34px;line-height:33px;color:#fff;background-position:-40px 0px;';download_button.innerHTML = "<span>下载</span>";download_button.className = "f-fr j-hovershow download-button";download_button.style = ksbtn_style;download_button.lastChild.style = ksbtn_span_style;allNodes[i].appendChild(download_button);}$('.download-button').each(function(){ //下载按钮点击事件$(this).click(function(event){loadSetting();if(course_save_path==""){alert("请到下载助手的设置里面填写文件保存位置");}else if(aria2_url==""){alert("请到下载助手的设置里面填写 Aria2 地址");}else{var data_chapter = event.target.parentNode.parentNode.getAttribute("data-chapter");var data_lesson = event.target.parentNode.parentNode.getAttribute("data-lesson");var index = Number(data_lesson);for(var i = 0;i < Number(data_chapter); i ++){index = index - course_info.chapter_info[i].lesson_info.length;}var lesson = course_info.chapter_info[data_chapter].lesson_info[index];mylog("选择的课为【lesson_name: " + lesson.lesson_name + ",lesson_id: " + lesson.lesson_id + ",lesson_type: " + lesson.lesson_type + '】');var file_name = lesson.keshi + '_' + lesson.lesson_name;var save_path = course_save_path.replace(/\\/g,'\/') + '/' + course_info.course_name + '/章节' + (Number(data_chapter) + 1) + '_' + course_info.chapter_info[data_chapter].chapter_name;if(lesson.lesson_type=="3"){getTextLearnInfo(lesson,file_name,save_path);}else{getVideoLearnInfo(lesson,file_name,save_path);}}event.stopPropagation();});});}//获取文档下载地址function getTextLearnInfo(lesson,file_name,save_path){var timestamp = new Date().getTime();var params = {"callCount":"1","scriptSessionId":"${scriptSessionId}190","httpSessionId":match_cookie,"c0-scriptName":"LessonLearnBean","c0-methodName":"getTextLearnInfo","c0-id":"0","c0-param0":"string:" + lesson.lesson_id,"c0-param1":"string:" + course_info.course_id,"batchId":timestamp};var url = "https://study.163.com/dwr/call/plaincall/LessonLearnBean.getTextLearnInfo.dwr?" + timestamp;$.ajax({url:url,method:'POST',async: true,data: params,success: function (response){var pdfUrl = response.match(/pdfUrl:"(.*?)"/)[1];sendDownloadTaskToAria2(pdfUrl,file_name + ".pdf",save_path);}});}//获取视频文件信息function getVideoLearnInfo(lesson,file_name,save_path){var timestamp = new Date().getTime();var params = {"callCount":"1","scriptSessionId":"${scriptSessionId}190","httpSessionId":match_cookie,"c0-scriptName":"LessonLearnBean","c0-methodName":"getVideoLearnInfo","c0-id":"0","c0-param0":"string:" + lesson.lesson_id,"c0-param1":"string:" + course_info.course_id,"batchId":timestamp};var url = "https://study.163.com/dwr/call/plaincall/LessonLearnBean.getVideoLearnInfo.dwr?" + timestamp;$.ajax({url:url,method:'POST',async: true,data: params,success: function (response){var signature = response.match(/signature="(\w+?)";/)[1];var videoId = response.match(/videoId=(\w+?);/)[1];getVideoUrl(videoId,signature,file_name,save_path);}});}//获取视频下载地址function getVideoUrl(videoId,signature,file_name,save_path){var params = {'videoId':videoId,'signature':signature,'clientType':'1'};$.ajax({url:"https://vod.study.163.com/eds/api/v1/vod/video",method:'POST',async:true,data:params,success:function(response){var videoUrls = response.r###lt.videos;var video_url_list = [];videoUrls.forEach(function(video){if(video.format == video_format) {video_url_list.push({'video_format': video.format,'video_quality': video.quality,'video_url': video.videoUrl});}});if(video_url_list.length != 0){if(video_quality=="2"){video_download_url = video_url_list[video_url_list.length-1].video_url;}else{video_download_url = video_url_list[0].video_url;}}if(video_download_url != ""){//mylog(video_download_url);sendDownloadTaskToAria2(video_download_url,file_name + '.' + video_format,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;}}});}//获取元素样式function getStyle(element,cssPropertyName){if(window.getComputedStyle){ //如果支持getComputedStyle属性（IE9及以上，ie9以下不兼容）return window.getComputedStyle(element)[cssPropertyName];} else { //如果支持currentStyle（IE9以下使用），返回return element.currentStyle[cssPropertyName];}}})();