// ==UserScript== // @name 图片下载器 // @namespace http://tampermonkey.net/ // @version 3.5.1 // @description 批量下载图片，一个可扩展的图片下载器。 // @author Gscsd // @include * // @icon 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// @grant GM_xmlhttpRequest // @grant GM_download // @grant GM_setValue // @grant GM_log // @grant GM_notification // @grant GM_registerMenuCommand // @connect * // @require https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js // @require https://cdn.bootcdn.net/ajax/libs/jszip/3.7.1/jszip.js // @run-at document-end // @noframes // @compatible Chrome // @compatible Edge // @downloadURL none // ==/UserScript== (function () { 'use strict'; function depthTest(fa, a) { let sum = 0; while (1) { if (a === fa) break; a = $(a).parent()[0]; sum++; } return sum } function FindBrothers(a) { let par = $(a).parent()[0], sea = $(par).find('img').toArray(); if (sea.length === 1) return FindBrothers(par) else { let depth = depthTest(par, getimg), sea1 = []; sea.forEach((item) => { if (depthTest(par, item) === depth) sea1.push(item) }) sea = sea1; if (sea.length === 1) return FindBrothers(par); return sea } } class TaskQueue { downloadIndex = 0; retryIndex = 0; results = []; transfer = []; error = []; //0未下载 1下载排队中 2下载排队完成，等待中 3下载成功 4下载失败 5下载完成 downloadStatus = 0 /** * @description 图片下载类 * @class * @constructor * @param {Object} o 配置对象 * @param {Array} o.imglist 图片下载链接列表 * @param {number=} [o.thread=20] 启用下载线程数 * @param {number=} [o.retryNum = 3] 下载出错，重试次数 * @param {Object=} [o.headers = {}] 图片请求头 * @param {string=} [o.downloadMode = "Zip"] 下载模式，Epub下载需配置扩展名白名单 * @param {string=} [o.author ="佚名"] 作者，生成Epub会用到 * @param {string=} o.filename 文件名，不包含拓展名 * @param {number=} o.timeout 请求超时，默认1min * @param {Boolean=} [o.autoRetry = false] 自动重试 * @param {Boolean=} [o.autoDownload = false] 重试失败后自动下载 * @param {?Function=} [o.onload = null] 成功回调 * @param {?Function=} [o.onerror = null] 失败回调 * @return {null} */ constructor(o) { if ($('#v_bar').length) { GM_notification({text: '下载中,请稍等...', timeout: 3000}) return } ({ imglist: this.queue = [], thread: this.thread = 20, retryNum: this.retryNum = 3, headers: this.headers = {}, downloadMode: this.downloadMode = "Zip", author: this.author = "佚名", filename: this.filename = document.title.replace(/- .*?$/, '').trim(), timeout: this.timeout = 60 * 1000, autoRetry: this.autoRetry = false, autoDownload: this.autoDownload = false, onload: this.onload = null, onerror: this.onerror = null } = o); this.progressList = Array(this.queue.length) $('body').append(`
`) $('head').append(``) GM_notification({text: '开始下载', title: this.filename, timeout: 3000}) this.downloadStart() } // 下载开始 downloadStart() { this.downloadStatus = 1; let download = () => { let index = this.downloadIndex if (!this.transfer[index] || ($.inArray(index, this.error) > -1 && this.error.shift() + 1)) { this.downloadIndex < this.queue.length - 1 && this.downloadIndex++ this.transfer[index] = Promise.race([new Promise((resolve, reject) => { GM_xmlhttpRequest({ method: "GET", url: this.queue[index], headers: this.headers, responseType: "blob", timeout: this.timeout, onload: r => { if (r.readyState === 4 && r.status === 200) { resolve(r.response) } else { reject(new Blob([], {type: "image/jpeg"})) } this.judgeFinish(download) }, onprogress: xhr => { if (xhr.lengthComputable) { this.progressList[index] = xhr.loaded / xhr.total * 100; this.progressBar() } }, onerror: _ => { reject(new Blob([], {type: "image/jpeg"})) this.judgeFinish(download) } }); }), new Promise((_, reject) => { setTimeout(reject, this.timeout, new Blob([], {type: "image/jpeg"})) })]) } else { //快速跳过 this.downloadIndex < this.queue.length - 1 && this.downloadIndex++ && download() } } // 建立多少个线程 let thread = [this.thread, this.queue.length]; //重试则按出错数开启线程 this.error.length > 0 ? thread.push(this.error.length) : null for (let i = 0; i < Math.min(...thread); i++) { download(i) } } //判断队列是否完成，并进行后续处理 judgeFinish(callback) { //当下载列表已遍历完成，检验是否每段都下载成功 if (this.queue.length === this.transfer.length && this.error.length === 0) { if (this.downloadStatus !== 1) return this.downloadStatus = 2; //下载状态改变 Promise.allSettled(this.transfer).then(all => { all.forEach((item, index) => { if (item.status === "rejected") { this.progressList[index] = 0 this.error.push(index) } }) //下载出错，尝试重新下载 if (this.error.length > 0) { let choice = !this.retryIndex && !this.autoRetry && confirm(`${this.error.length}张图片下载出错。强行打包下载？尝试重新下载？`) if (choice) { this.downloadStatus = 3; this.results = all.map(one => one.value || one.reason); this[this.downloadMode]() return } if (this.retryIndex === this.retryNum) { GM_notification({text: '下载失败', title: this.filename, timeout: 3000}) GM_log('下载失败') let choice1 = this.autoDownload || confirm(`重试5次下载失败。强行打包下载？放弃下载？`) if (choice1) { this.downloadStatus = 3; this.results = all.map(one => one.value || one.reason); this[this.downloadMode]() } else { this.downloadStatus = 4 $('#v_bar').remove() this.onerror && this.onerror() } } else !choice && this.retryAll() } //下载成功 else { this.downloadStatus = 3; this.results = all.map(one => one.value); this[this.downloadMode]() } }) } else callback && callback() } retryAll() { this.downloadIndex = 0; this.retryIndex++ this.downloadStart() } //进度条 progressBar() { let all = 0 this.progressList.forEach(item => { all += item || 0 }) $('#v_bar>div').height((100 - all / this.progressList.length).toFixed(2) + '%') return 1 } //处理非法文件名称 legalize(str) { let pattern = new RegExp("[\\\\:<>/?*|]"), rs = ""; for (let i = 0; i < str.length; i++) { rs += str.substr(i, 1).replace(pattern, ''); } return rs.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, ""); //const invalidchar = `~!@#$%^&*，。；‘’\\{【】[]}|`; } //下载 Download(content, file_extension) { let blob_url = URL.createObjectURL(content) // 重置进度条状态 this.progressList.fill(0) && this.progressBar() && $('#v_bar').css("background-color", "#e0e052") GM_download({ url: blob_url, name: this.legalize(this.filename) + file_extension, onload: _ => { $('#v_bar').remove() GM_notification({text: '下载成功', title: this.filename, timeout: 3000}) GM_log('下载成功') this.downloadStatus = 5; URL.revokeObjectURL(blob_url) this.onload && this.onload() }, onprogress: r => { if (r.lengthComputable) { this.progressList.fill(r.loaded / r.total * 100); this.progressBar() } }, onerror: _ => { $('#v_bar').remove() GM_notification({text: '下载至本地失败', title: this.filename, timeout: 3000}) GM_log('下载至本地失败') this.downloadStatus = 5; URL.revokeObjectURL(blob_url) this.onerror && this.onerror() } }); } //Zip打包下载 Zip() { let zip = new JSZip(), num = this.queue.length.toString().length; this.results.forEach((content, index) => { // 重置进度条状态 !index && this.progressList.fill(0) && this.progressBar() && $('#v_bar').css("background-color", "red") //处理可能无content type情况 let img_type=content.type||"image/jpeg" let name = `${(index + 1).toString().padStart(num, '0')}.${img_type.split('/')[1].replace('jpeg', 'jpg')}` zip.file(name, content, {blob: true}); zip.file(name).async("blob", metadata => { this.progressList[index] = metadata.percent; this.progressBar() }) }) zip.generateAsync({type: "blob"}).then(content => this.Download(content, '.zip')); } //Epub打包下载 Epub() { let epub = new JSZip(), num = this.queue.length.toString().length; //指定文件类型 epub.file('mimetype', 'application/epub+zip'); //container文件 epub.file('META-INF/container.xml', ` `); //配置元数据 let uuid = URL.createObjectURL(new Blob()).split('/').reverse()[0]; let metadata = ` ${this.filename} ${this.author} ${uuid} GSCSD GSCSD ${new Date().toISOString()} zh ${this.results.map((content, index) => { let id = (index + 1).toString().padStart(num, '0'), type_name = content.type.split('/')[1].replace('jpeg', 'jpg') return `` }).join('\n ')} ` epub.file('OEBPS/metadata.opf', metadata); //配置目录 let toc = ` ${this.filename} 图片 ${this.results.length}P ` epub.file('OEBPS/toc.ncx', toc); //配置主html let html = ` 图片页
${this.results.map((content, index) => { let id = (index + 1).toString().padStart(num, '0'), type_name = content.type.split('/')[1].replace('jpeg', 'jpg') return `加载失败` }).join('\n ')}
` epub.file('OEBPS/main.html', html); this.results.forEach((content, index) => { // 重置进度条状态 !index && this.progressList.fill(0) && this.progressBar() && $('#v_bar').css("background-color", "red") //处理可能无content type情况 let img_type=content.type||"image/jpeg" let name = `OEBPS/Images/${(index + 1).toString().padStart(num, '0')}.${img_type.split('/')[1].replace('jpeg', 'jpg')}` epub.file(name, content, {blob: true}); epub.file(name).async("blob", metadata => { this.progressList[index] = metadata.percent; this.progressBar() }) }) epub.generateAsync({type: "blob"}).then(content => this.Download(content, '.epub')); } } unsafeWindow.TaskQueue = TaskQueue; function add_listener() { let el_list = []; document.querySelectorAll("img").forEach(img => { let a_el = $(img).parents('a'), click_el = a_el.length ? a_el[0] : img el_list.push(click_el) //先移除之前事件监听 $(click_el).off('click').click(e => { // e.stopImmediatePropagation() if ($('#v_bar').length) { GM_notification({text: '下载中,请稍等...', timeout: 3000}) return } window.getimg = e.target; // let imglist, width = [], height = []; let imglist = FindBrothers(e.target).map((one, index) => { //[width[index], height[index]] = [one.naturalWidth, one.naturalHeight] return one.src }); let len = imglist.length; if (len === 0) return; if (confirm(`下载全部${len}张图片?`)) new TaskQueue({imglist: imglist}) }); }) return el_list } //重生成元素，去除事件监听绝杀无解 function remake(el) { let parent = $(el).parent(), next = $(el).next(), html = el.outerHTML; $(el).remove(); next.length ? $(next).before(html) : $(parent).append(html) } //1.a标签新窗口打开 $('a').attr("target", "_blank") //2.移除onclick属性，主流网站基本弃用 $("[onclick]").removeAttr("onclick"); add_listener(); //3.尝试移除图片上事件监听 GM_registerMenuCommand("绝招，启用后再点试试！", _ => { let els = add_listener(); els.forEach(el => remake(el)); add_listener() }); //4.直接重构除script的整个body，釜底抽薪 GM_registerMenuCommand("终招，启用后再点试试！", _ => { document.querySelectorAll('body>*:not(script)').forEach(el => remake(el)) add_listener() }); //循环添加图片监听，为动态加载图片而准备 setInterval(add_listener, 2000) })();