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知网cnki搜索结果页快捷下载PDF，支持批量下载（支持进度查看），支持后台新窗口无感下载，支持下载间隔时间调整，cnki_search_download_helper
// ==UserScript==
// @name 知网CNKI搜索页批量下载PDF_单个下载_下载进度_新窗口无感下载_调整下载时间_cnki_search_download_helper
// @namespace http://ilxdh.com/
// @icon https://kdoc.cnki.net/favicon.ico
// @version 0.4
// @description 知网cnki搜索结果页快捷下载PDF，支持批量下载（支持进度查看），支持后台新窗口无感下载，支持下载间隔时间调整，cnki_search_download_helper
// @author longxuan
// @match *://kns.cnki.net/*
// @match *://tra.oversea.cnki.net/*
// @match *://chn.oversea.cnki.net/*
// @grant GM_addStyle
// @grant GM_openInTab
// ==/UserScript==
(function () {
"use strict";
// 批量下载新窗口打开间隔
let defaultOpenInterval = 5;
// 是否聚焦下载窗口；默认-1：不聚焦
let isDownActive = "-1";
const icon =
"data:image/png;base64,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";
let progressFlag = false;
// 当前页所有PDF地址
let pdfDownLoadUrlArr = [];
// 待下载PDF地址
let curDownUrlArr = []
let isDownloading = false;
const diyBulkDownPdfStyle = `
.diy-down-wrap{
text-align: right;
margin-top: 10px;
color: #0f5de5;
font-size: 0;
}
.diy-select-opentype{
display: inline-block;
color: #0f5de5;
margin-right: 10px;
}
.diy-select-opentype-select{
color: #0f5de5;
}
.diy-select-opentype span{
display: inline-block;
font-size: 12px;
}
.diy-download-interval-wrap{
margin-right: 10px;
display: inline-block;
font-size: 12px;
}
.diy-download-interval-input{
font-size: 10px;
color: #0f5de5;
width: 50px;
padding-left: 5px;
}
.diy-progress-bar{
display: inline-block;
font-size: 12px;
color: #0f5de5;
margin-right: 10px;
}
.diy-bulk-down-pdf{
display: inline-block;
padding: 2px 8px;
line-height: 18px;
color: #0f5de5;
font-size: 12px;
text-align: center;
background-color: #e3ecfd;
border: 1px solid #fff;
cursor: pointer;
}
.diy-bulk-down-pdf:hover{
color: #fff;
background-color: #0c5de4;
}`;
GM_addStyle(diyBulkDownPdfStyle);
function sleep(timeout) {
return new Promise((resolve) => {
setTimeout(() => {
resolve();
}, timeout * 1000);
});
}
function domChange() {
if (progressFlag) {
return;
}
progressFlag = true;
waitForEle(".result-table-list", startHandle);
}
// 获取到元素
function waitForEle(name, callback) {
const ele = $(name);
if (!ele.size()) {
setTimeout(() => {
waitForEle(name, callback);
}, 1000);
} else {
callback && callback();
}
}
function startHandle() {
addBulkDownloadBtn();
handleDownlinks();
}
function handleStyle() {
$(".result-table-list .operat").css("min-width", "112px");
}
// 添加批量下载PDF按钮
function addBulkDownloadBtn() {
if ($(".diy-down-wrap").length) {
return;
}
const btnEle = $(
`<div class="diy-down-wrap">
<div class="diy-select-opentype">
<span>是否聚焦下载窗口：</span>
<select class="diy-select-opentype-select" style="border:0.5px solid #0f5de5">
<option value="-1">否</option>
<option value="1">是</option>
</select>
</div>
<div class="diy-download-interval-wrap">下载间隔：<input value="${defaultOpenInterval}" class="diy-download-interval-input" style="border:0.5px solid #0f5de5"> 秒</div>
<div class="diy-progress-bar">进度：0/0</div>
<div class="diy-bulk-down-pdf">批量下载(PDF)</div>
</div>`
);
$(".result-table-list").before(btnEle);
$(".diy-select-opentype-select").val(isDownActive);
}
function joinUrl(url){
return window.location.origin + url
}
// 下载链接添加后缀
function handleDownlinks() {
const links = $(".downloadlink");
if (links.length) {
handleStyle();
const tempRes = [];
links.each(function () {
const $this = $(this);
if ($this.parent().find(".diy-pdf-download").length > 0) {
return;
}
const curHref = $this.attr("href");
const curPdfHref = `${curHref}&dflag=pdfdown`;
$this.after(
$(
`<a href="${curPdfHref}" title="下载PDF" target="_blank" class="diy-pdf-download"><i style="background-image: url('${icon}');background-position:0 0;background-size: 14px;position:relative;top:3px;left:2px;"></i></a>`
)
);
tempRes.push(joinUrl(curPdfHref));
});
if (tempRes.length) {
pdfDownLoadUrlArr = tempRes;
curDownUrlArr = pdfDownLoadUrlArr
setProgressBarText(0);
}
}
progressFlag = false;
}
function setProgressBarText(value) {
const text =
value < curDownUrlArr.length
? `${value}/${curDownUrlArr.length}`
: "已完成";
$(".diy-progress-bar").text(`进度：${text}`);
}
function downPdfClick() {
$("#briefBox").on("click", ".diy-bulk-down-pdf", function () {
if (isDownloading) {
alert("正在下载，请勿重复点击");
return;
}
const inputValue = $(".diy-download-interval-input").val();
const intReg = /^[1-9]\d*$/;
if (!intReg.test(inputValue)) {
alert("打开间隔必须为正整数");
return;
}
if (!pdfDownLoadUrlArr.length) {
alert("未检测到下载地址");
return;
}
const tempCheckedInput = []
const tempCheckedUrl = []
$(".result-table-list").find("input:checkbox").each(function () {
if ($(this).prop("checked") == true) {
tempCheckedInput.push($(this))
const pdfItem = $(this).parents('tr').find('.operat').find('.diy-pdf-download')
if(pdfItem.length){
tempCheckedUrl.push(joinUrl(pdfItem.attr('href')))
}
}
});
if(tempCheckedInput.length && !tempCheckedUrl.length){
alert('已勾选的内容，未检测到有效下载地址！')
return
}
curDownUrlArr = tempCheckedUrl.length ? tempCheckedUrl : pdfDownLoadUrlArr
startDownload(inputValue);
});
}
function changeOpenInterval() {
$("#briefBox").delegate(
".diy-download-interval-input",
"propertychange input",
function () {
defaultOpenInterval = parseInt($(this).val());
}
);
}
function changeDownActive() {
$("#briefBox").on("change", ".diy-select-opentype-select", function () {
isDownActive = $(this).val();
});
}
function bindEvents() {
downPdfClick();
changeOpenInterval();
changeDownActive();
}
// 新窗口打开下载
async function startDownload(timeout) {
isDownloading = true;
const isActive =
parseInt($(".diy-select-opentype-select").val()) === 1 ? true : false;
for (let i = 0; i < curDownUrlArr.length; i++) {
const url = curDownUrlArr[i];
GM_openInTab(url, { active: isActive });
setProgressBarText(i + 1);
if (curDownUrlArr.length === i + 1) {
isDownloading = false;
}
await sleep(timeout);
}
}
window.onload = function () {
const briefBoxEl = document.getElementById("briefBox");
if (briefBoxEl) {
const observer = new MutationObserver(domChange);
observer.observe(briefBoxEl, {
attributes: true,
subtree: true,
});
bindEvents();
// 兼容
domChange();
}
};
})();