短视频去水印（支持抖音网页版）

一款短视频去水印下载工具，支持抖音网页版视频无水印下载
Ekde 2023/11/13. Vidu La ĝisdata versio.
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// ==UserScript==
// @name         短视频去水印（支持抖音网页版）
// @version      1.1.8
// @license      MIT
// @description  一款短视频去水印下载工具，支持抖音网页版视频无水印下载
// @icon         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
// @author       我爱工具箱
// @match      *://*.douyin.com/*
// @require      https://lib.baomitu.com/jquery/3.6.0/jquery.js
// @require      https://lib.baomitu.com/sweetalert/2.1.2/sweetalert.min.js
// @require      https://lib.baomitu.com/clipboard.js/2.0.6/clipboard.min.js
// @grant        GM_addStyle
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_deleteValue
// @grant        GM_listValues
// @grant        GM_openInTab
// @grant        GM_notification
// @grant        GM_xmlhttpRequest
// @grant        GM_download
// @namespace https://greasyfork.org/users/894875
// ==/UserScript==
 
(function() {
    let showTipErrorSwal = function(err) {
        showSwal(err, { icon: 'error' });
    }
 
    const divTips = document.createElement('div');
    divTips.id = "divTips";
 
    let showSwal = function(content, option) {
        divTips.innerHTML = content;
        option.content = divTips;
        if (!option.hasOwnProperty('button')) {
            option.button = '我知道了'
        }
        swal(option);
    }
 
    let isDouyinPage = function() {
        let url = location.href;
        if (url.indexOf(".douyin.com/") != -1) {
            return true;
        } else {
            return false;
        }
    };
 
    let getVideoUrl = function() {
        let RENDER_DATA = document.getElementById("RENDER_DATA");
        if (RENDER_DATA == null) {
            return "";
        }
        let RENDER_DATA_STR = RENDER_DATA.textContent;
        renderData = decodeURIComponent(RENDER_DATA_STR);
        let jsonObject = JSON.parse(renderData);
        let data = null;
        for (let key in jsonObject) {
            if ("_location" == key || "app" == key || "11" == key) {
                continue;
            }
            data = key;
        }
        let dataJo = jsonObject[data];
        let detail = dataJo["videoDetail"];
        let video = detail["video"];
        let playAddr = video["playAddr"];
        let video1 = playAddr[0];
        let src = video1["src"];
        let videoUrl = "https:" + src;
        videoUrl = videoUrl.substring(0, videoUrl.length - 1);
        return videoUrl;
    }
 
    var isDownVideo = false;
 
    let successCall = function(videoUrl, videoName) {
        if (videoUrl == null) {
            videoUrl = getVideoUrl();
        }
        if (!isDownVideo) {
            GM_download({ url: videoUrl, name: videoName + '.mp4' });
            isDownVideo = true;
        }
    }
 
    let initButtonEvent = function(btn) {
        if (isDouyinPage()) {
            let videoType = Number.parseInt(btn.getAttribute("type"));
            if(videoType == 1) {
                videoDownloadNum = 0;
                let videoIndex = btn.getAttribute("videoIndex");
                let videoSlide = document.getElementById("slidelist");
                let videoClassArr = videoSlide.firstChild.firstChild;
                //推荐~朋友
                let videoArr = videoClassArr.getElementsByClassName("page-recommend-container");
                if(videoArr.length == 0) {
                    //首页
                    videoArr = videoClassArr.getElementsByClassName("dySwiperSlide");
                }
                let videoItemDiv = videoArr[videoIndex];
    
                //视频名
                let accountNameSpanNode = videoItemDiv.getElementsByClassName("title")[0].childNodes[0];
                let videoName = accountNameSpanNode.firstElementChild.lastElementChild.textContent;
                if(videoName == "") {
                  videoName = "无标题视频";
                }
    
                //视频链接
                let sliderVideoDiv = videoItemDiv.getElementsByClassName("slider-video");
                let xgVideoContainerDiv = sliderVideoDiv[0].getElementsByClassName("xg-video-container");
                let videoNode = xgVideoContainerDiv[0].getElementsByTagName("video");
                let videoSrc = videoNode[0].getAttribute("src");
                if(videoSrc != null) {
                    showTipErrorSwal("暂不支持该视频下载，正在加紧适配中...");
                }else{
                  let sourceNodes = videoNode[0].getElementsByTagName("source");
                  for (let i = 0; i < sourceNodes.length; i++) {
                      try {
                          let videoUrl = decodeURI('https:' + sourceNodes[i].getAttribute("src"));
                          GM_xmlhttpRequest(headRequest(videoUrl, videoName, successCall));
                          if(successCall) {
                            isDownVideo = false;
                            break;
                          }
                      } catch (error) {
                          console.error(error);
                      }
                  }
                }
            }else if(videoType == 2) {
                let videoClassArr = document.getElementsByClassName("playerControlHeight");
                let videoInfoArr = videoClassArr[0].getElementsByClassName("leftContainer");
                let videoNameArr = videoInfoArr[0].childNodes[2].firstElementChild.getElementsByTagName("h1");
                let videoName = videoNameArr[0].textContent;
                if(videoName == "") {
                  videoName = "无标题视频";
                }
                let videoArr = videoClassArr[0].getElementsByClassName("xg-video-container");
                let videoNode = videoArr[0].getElementsByTagName("video");
                let sourceNodes = videoNode[0].getElementsByTagName("source");
                  for (let i = 0; i < sourceNodes.length; i++) {
                      try {
                          let videoUrl = decodeURI('https:' + sourceNodes[i].getAttribute("src"));
                          GM_xmlhttpRequest(headRequest(videoUrl, videoName, successCall));
                          if(successCall) {
                            isDownVideo = false;
                            break;
                          }
                      } catch (error) {
                          console.error(error);
                      }
                  }
            }else if(videoType == 3) {
                let videoClassArr = document.getElementsByClassName("slider-video");
                let videoDiv = videoClassArr[0];
                //视频名
                let accountNameSpanNode = videoDiv.getElementsByClassName("title")[0].childNodes[0];
                let videoName = accountNameSpanNode.firstElementChild.lastElementChild.textContent;
                if(videoName == "") {
                  videoName = "无标题视频";
                }
                let xgVideoContainerDiv = videoDiv.getElementsByClassName('xg-video-container');
                let videoNode = xgVideoContainerDiv[0].getElementsByTagName("video");
                let videoSrc = videoNode[0].getAttribute("src");
                if(videoSrc != null) {
                    showTipErrorSwal("暂不支持该视频下载，正在加紧适配中...");
                }else{
                  let sourceNodes = videoNode[0].getElementsByTagName("source");
                  for (let i = 0; i < sourceNodes.length; i++) {
                      try {
                          let videoUrl = decodeURI('https:' + sourceNodes[i].getAttribute("src"));
                          GM_xmlhttpRequest(headRequest(videoUrl, videoName, successCall));
                          if(successCall) {
                            isDownVideo = false;
                            break;
                          }
                      } catch (error) {
                          console.error(error);
                      }
                  }
                }
            }
        }
    };
 
    let headRequest = function(url, videoName, call) {
        return {
            method: 'HEAD',
            timeout: 300000, // 30秒超时
            url: url,
            onload: function(res) {
                if (res.status === 200 || res.status === 401) {
                    call(url, videoName);
                } else {
                    console.error(res);
                }
            },
            ontimeout: (res) => {
                console.error(res);
            },
            onerror: (res) => {
                console.error(res);
            }
        }
    };
 
    let start = function() {
        if (!isDouyinPage()) {
            // console.log('非抖音页面，1秒后将重新查找！');
            return;
        }
 
        if(document.body.getInnerHTML() == "") {
            return;
        }
        let isIndexVideo = getIndexVideo();
        if(!isIndexVideo) {
            if(!getIndexDetailVideo()) {
                getDetailVideo();
            }
        }
    }
 
    /**
     * 首页/推荐/我的
     * @returns 
     */
    function getIndexVideo() {
        let videoSlide = document.getElementById("slidelist");
        if(videoSlide == null) {
            // console.log('未查找到视频列表div！');
            return false;
        }
        let videoClassArr = videoSlide.firstChild.firstChild;
        if(videoClassArr.length == 0) {
            // console.log('未查找到视频div！');
            return false;
        }
 
        //推荐~朋友
        let videoArr = videoClassArr.getElementsByClassName("page-recommend-container");
        if(videoArr.length == 0) {
            //首页
            videoArr = videoClassArr.getElementsByClassName("dySwiperSlide");
        }
        if(videoArr.length == 0) {
            // console.log('未查找到视频div列表');
            return false;
        }
 
        //偏移量
        let shiftingDiv = videoSlide.getElementsByClassName("fullscreen_capture_feedback");
        let height = shiftingDiv[0].style.height;
        let shifting = 0;
        if(height != "100%") {
          shifting = height.match(/calc\(\d+%\s*-\s*(\d+)px\)/i)[1];
        }
        //每个视频的高度
        let firstVideoDiv = videoArr[0];
        let firstVideoHeight = firstVideoDiv.style.height;
        firstVideoHeight = firstVideoHeight.replace("px", "");
        let videoTransForm= videoClassArr.style.transform || '';
        //视频下标
        var videoIndex = 0;
        let videoTransFormarr = videoTransForm.match(/translate3d\(\d+px,\s*(-+\d+)px,\s*(\d+)px\)/i);
        if(videoTransFormarr != null) {
          let videoTransFormY = videoTransFormarr[1];
          videoTransFormY = -videoTransFormY;
          videoIndex = videoTransFormY/(parseInt(firstVideoHeight) + parseInt(shifting));
        }
 
        let btnBox = videoArr[videoIndex].getElementsByClassName('positionBox');
        if(btnBox.length == 0) {
            // console.log('可能为直播页面或登录弹出页面');
            return false;
        }
        if(btnBox[0].childNodes.length > 1) {
            var btnShare = btnBox[0].childNodes[1];
        }else{
            var btnShare = btnBox[0].childNodes[0];
        }
        if(btnShare == undefined) {
            // console.log('可能还未初始化分享按钮');
            return false;
        }
    
        let btnDownload = {
            class: 'btnClickDownload',
            title: '点击下载视频',
            html: function() {
                return `<img height="26" width="26" src="data:image/png;base64,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"/>`;
            }
        }
        //如果是已有下载按钮，则不添加
        let buttonArr = btnShare.getElementsByClassName(btnDownload.class);
        if (buttonArr.length != 0) {
            return false;
        }
 
        let btn = document.createElement('a');
        btn.setAttribute("type", 1);
        btn.setAttribute("class", btnDownload.class);
        btn.setAttribute("videoIndex", videoIndex);
        btn.title = btnDownload.title;
        btn.innerHTML = btnDownload.html();
        btn.addEventListener('click', function(e) {
            initButtonEvent(btn);
            e.preventDefault();
        });
 
        btnShare.appendChild(btn);
        return true;
    }
 
    /**
     * 首页/推荐/我的-详情
     * @returns 
     */
    function getIndexDetailVideo() {
        let videoClassArr = document.getElementsByClassName("slider-video");
        if(videoClassArr.length == 0) {
            // console.log('未查找到视频div！');
            return false;
        }
        let videoDiv = videoClassArr[0];
        let xgVideoContainerDiv = videoDiv.getElementsByClassName('xg-video-container');
        if(xgVideoContainerDiv.length == 0) {
            // console.log('可能为直播页面或登录弹出页面');
            return false;
        }
        let positionBoxDiv = videoDiv.getElementsByClassName("positionBox");
        let btnShare = positionBoxDiv[0].childNodes[1];
        if(btnShare == undefined) {
            // console.log('可能还未初始化分享按钮');
            return false;
        }
    
        let btnDownload = {
            class: 'btnClickDownload',
            title: '点击下载视频',
            html: function() {
                return `<img height="26" width="26" src="data:image/png;base64,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"/>`;
            }
        }
        //如果是已有下载按钮，则不添加
        let buttonArr = btnShare.getElementsByClassName(btnDownload.class);
        if (buttonArr.length != 0) {
            return false;
        }
 
        let btn = document.createElement('a');
        btn.setAttribute("type", 3);
        btn.setAttribute("class", btnDownload.class);
        btn.title = btnDownload.title;
        btn.innerHTML = btnDownload.html();
        btn.addEventListener('click', function(e) {
            initButtonEvent(btn);
            e.preventDefault();
        });
 
        btnShare.appendChild(btn);
        return true;
    }
 
    /**
     * 其他页详情
     * @returns 
     */
    function getDetailVideo() {
        let videoClassArr = document.getElementsByClassName("playerControlHeight");
        if(videoClassArr.length == 0) {
            // console.log('未查找到视频总div！');
            return false;
        }
        let videoDiv = videoClassArr[0];
 
        //详情
        let  videoArr = videoDiv.getElementsByClassName("xg-video-container");
        if(videoArr.length == 0) {
            // console.log('未查找到视频div');
            return false;
        }
 
        let btnGrid = videoDiv.getElementsByClassName('xg-right-grid');
 
        let btnDownload = {
            class: 'btnClickDownload',
            title: '点击下载视频',
            html: function() {
                return `<img height="22" width="22" src="data:image/png;base64,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"/>`;
            }
        }
        //如果是已有下载按钮，则不添加
        let buttonArr = btnGrid[0].getElementsByClassName(btnDownload.class);
        if (buttonArr.length != 0) {
            return false;
        }
 
        let btn = document.createElement('a');
        btn.setAttribute("type", 2);
        btn.setAttribute("class", btnDownload.class);
        btn.title = btnDownload.title;
        btn.innerHTML = btnDownload.html();
        btn.addEventListener('click', function(e) {
            initButtonEvent(btn);
            e.preventDefault();
        });
 
        btnGrid[0].appendChild(btn);
        return true;
    }
 
    setInterval(function() {
        start();
    }, 1000)
})();