批量下载图片，一个可扩展的图片下载器。
目前為
// ==UserScript==
// @name 图片下载器
// @namespace http://tampermonkey.net/
// @version 3.2.3
// @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
// @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
// ==/UserScript==
(function () {
'use strict';
function depthTest(fa, a) {
var sum = 0;
while (1) {
if (a === fa) break;
a = $(a).parent()[0];
sum++;
}
return sum
}
function FindBrothers(a) {
let par = $(a).parent()[0], sea = $(par).find('img').toArray();
if (sea.length === 1) return FindBrothers(par)
else {
let depth = depthTest(par, getimg), sea1 = [];
sea.forEach((item) => {
if (depthTest(par, item) === depth) sea1.push(item)
})
sea = sea1;
if (sea.length === 1) return FindBrothers(par);
return sea
}
}
//重写下载函数
/*function GM_download(url, name) {
let a = document.createElement('a')
a.download = name
a.href = url
a.style.display = 'none'
document.body.appendChild(a)
a.click()
a.remove()
}*/
class TaskQueue {
downloadIndex = 0;
retryIndex = 0;
results = [];
transfer = [];
error = [];
//0未下载 1下载排队中 2下载排队完成，等待中 3下载成功 4下载失败 5下载完成
downloadStatus = 0
constructor(o) {
if ($('#v_bar').length) {
GM_notification({text: '下载中,请稍等...', timeout: 3000})
return
}
/*
api：
TaskQueue(details)
图片下载类。
Property of details：
imglist: 图片下载链接列表，默认[]，必选；
thread: 启用下载线程，默认10；
retryNum: 下载出错，重试次数，默认5；
filename: 打包zip文件名，默认当前网站标题（稍做处理）；
timeout: 单张图片请求超时，默认60 * 1000ms，即1min；
autoRetry: 下载出错自动重试，默认false；
autoDownload: 重试失败后自动下载，默认false；
onload: 成功回调，默认null；
onerror: 失败回调，默认null。
e.g.
let imglist = document.querySelectorAll('.normal-img'), Imglist = []
let len = imglist.length;
for (let i = 0; i < len; i++) {
Imglist.push(new URL(imglist[i].getAttribute('data-src').split('@')[0], location.href).href)
}
setTimeout(_ => {
if (len >= 2) {
if (confirm(`下载全部${len}张图片?`)) {
new TaskQueue({
imglist: Imglist,
filename: document.title.split('-')[0].trim()
});
}
}
}, 2000)
more：
1.启用本下载器后，超链接跳转在下载未完成或手动取消前将被禁止，请务必在不需要时关闭本下载器；
2.仅支持zip批量打包下载,兼容移动端kiwi浏览器；
3.请允许跨域图片下载权限；
4.若蓝色下载进度条，超过默认超时时间仍卡死，请刷新重试；
5.由于现在不少网站使用了lazyload技术，不一定能获取到图片链接，所以最好从头划到尾，等图片加载后再下载；
6.若普通点击，无法捕获到图片，启动下载，可按照上api自行适配；
7.学艺不精，水平有限，内行勿笑。
*/
({
imglist: this.queue = [],
thread: this.thread = 10,
retryNum: this.retryNum = 5,
filename: this.filename = document.title.replace(/- .*?$/, '').trim(),
//请求超时
timeout: this.timeout = 60 * 1000,
//自动重试
autoRetry: this.autoRetry = false,
//重试失败后自动下载
autoDownload: this.autoDownload = false,
//成功回调
onload: this.onload = null,
//失败回调
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],
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.Zip()
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.Zip()
} 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.Zip()
}
})
} 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
})
$('#v_bar>div').height((100 - all / this.progressList.length).toFixed(2) + '%')
return 1
}
//处理非法文件名称
legalize(str) {
var pattern = new RegExp("[\\\\:<>/?*|]");
var rs = "";
for (var i = 0; i < str.length; i++) {
rs += str.substr(i, 1).replace(pattern, '');
}
return rs.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "");
//const invalidchar = `~!@#$%^&*，。；‘’\\{【】[]}|`;
}
//打包下载
Zip() {
var zip = new JSZip(), num = this.queue.length.toString().length;
// var allen = this.queue.length, num = allen > 99 ? 3 : (allen > 9 ? 2 : 1);
this.results.forEach((content, index) => {
// 重置进度条状态
!index && this.progressList.fill(0) && this.progressBar() && $('#v_bar').css("background-color", "red")
let name = `${(index + 1).toString().padStart(num, '0')}.${content.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 => {
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) + '.zip',
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)
document.querySelectorAll("a").forEach(a => a.removeEventListener("click", prevent));
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)
document.querySelectorAll("a").forEach(a => a.removeEventListener("click", prevent));
this.onerror && this.onerror()
}
});
// GM_download(blob_url, this.legalize(this.filename) + '.zip');
// $('#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.onsuccess && this.onsuccess()
});
}
}
unsafeWindow.TaskQueue = TaskQueue;
//1.阻止a标签跳转
function prevent(e) {
e.preventDefault()
}
document.querySelectorAll("a").forEach(a => a.addEventListener("click", prevent));
//2.移除onclick属性
$("[onclick]").removeAttr("onclick");
document.querySelectorAll("img").forEach(img => {
let a_el = $(img).parents('a'), click_el = a_el.length ? a_el[0] : img
$(click_el).click(e => {
e.stopImmediatePropagation()
if ($('#v_bar').length) {
GM_notification({text: '下载中,请稍等...', timeout: 3000})
return
}
window.getimg = e.target;
let imglist, width = [], height = [];
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})
} else document.querySelectorAll("a").forEach(a => a.removeEventListener("click", prevent));
});
})
})();
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