批量下载图片，一个可扩展的图片下载器。
// ==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
// ==/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(`<div id="v_bar"><div></div></div>`)
$('head').append(`<style>
#v_bar{
width: 1%;
height: 80%;
background-color: #00ffff;
position: fixed;
top: 50%;
left: 0;
z-index: 999999999;
transform: translate(0,-50%);
}
#v_bar>div{
height: 100%;
background-color: #8c939d;
}
</style>`)
GM_notification({text: '开始下载', title: this.filename, timeout: 3000})
this.downloadStart()
}
// 下载开始
downloadStart() {
this.downloadStatus = 1;
let download = () => {
let index = this.downloadIndex
if (!this.transfer[index] || ($.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')}.${img_type.split('/')[1].replace('jpeg', 'jpg')}`
zip.file(name, content, {blob: true});
zip.file(name).async("blob", metadata => {
this.progressList[index] = metadata.percent;
this.progressBar()
})
})
zip.generateAsync({type: "blob"}).then(content => this.Download(content, '.zip'));
}
//Epub打包下载
Epub() {
let epub = new JSZip(), num = this.queue.length.toString().length;
//指定文件类型
epub.file('mimetype', 'application/epub+zip');
//container文件
epub.file('META-INF/container.xml', `<?xml version="1.0"?>
<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
<rootfiles>
<rootfile full-path="OEBPS/metadata.opf" media-type="application/oebps-package+xml"/>
</rootfiles>
</container>`);
//配置元数据
let uuid = URL.createObjectURL(new Blob()).split('/').reverse()[0];
let metadata = `<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuid_id" version="2.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:opf="http://www.idpf.org/2007/opf">
<dc:title>${this.filename}</dc:title>
<dc:creator opf:role="aut" opf:file-as="${this.author}">${this.author}</dc:creator>
<dc:identifier opf:scheme="uuid" id="uuid_id">${uuid}</dc:identifier>
<dc:contributor opf:file-as="GSCSD" opf:role="bkp">GSCSD</dc:contributor>
<dc:publisher>GSCSD</dc:publisher>
<dc:date>${new Date().toISOString()}</dc:date>
<dc:language>zh</dc:language>
<meta name="cover" content="cover"/>
</metadata>
<manifest>
<item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>
<item id="main" href="main.html" media-type="application/xhtml+xml"/>
${this.results.map((content, index) => {
let id = (index + 1).toString().padStart(num, '0'),
type_name = content.type.split('/')[1].replace('jpeg', 'jpg')
return `<item id="image${id}" href="Images/${id}.${type_name}" media-type="${content.type}"/>`
}).join('\n ')}
<item id="cover" href="Images/${(1).toString().padStart(num, '0')}.${this.results[0].type.split('/')[1].replace('jpeg', 'jpg')}" media-type="image/jpeg"/>
</manifest>
<spine toc="ncx">
<itemref idref="main"/>
</spine>
</package>
`
epub.file('OEBPS/metadata.opf', metadata);
//配置目录
let toc = `<?xml version='1.0' encoding='utf-8'?>
<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1" xml:lang="zh">
<head>
<meta name="dtb:uid" content="${uuid}"/>
<meta name="dtb:depth" content="2"/>
<meta name="dtb:generator" content="GSCSD"/>
<meta name="dtb:totalPageCount" content="0"/>
<meta name="dtb:maxPageNumber" content="0"/>
</head>
<docTitle>
<text>${this.filename}</text>
</docTitle>
<navMap>
<navPoint id="num_1" playOrder="1">
<navLabel>
<text>图片 ${this.results.length}P</text>
</navLabel>
<content src="main.html"/>
</navPoint>
</navMap>
</ncx>
`
epub.file('OEBPS/toc.ncx', toc);
//配置主html
let html = `<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title>图片页</title>
<style>
img{
width: 100%;
}
</style>
</head>
<body>
<div>
${this.results.map((content, index) => {
let id = (index + 1).toString().padStart(num, '0'),
type_name = content.type.split('/')[1].replace('jpeg', 'jpg')
return `<img src="Images/${id}.${type_name}" alt="加载失败">`
}).join('\n ')}
</div>
</body>
</html>`
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)
})();
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