优化了跨页加载时按钮消失的问题，修复了卡死和jQuery依赖问题，精确匹配截图所示DOM结构。批量下载检索目录文献。
// ==UserScript==
// @name 2025知网批量下载 (带计数器版)
// @namespace CNKI PreciseDOM
// @match *://119.45.237.51/*
// @match *://119.45.145.238/*
// @match *://kns.cnki.net/*
// @match */kns8s/*
// @grant none
// @version 2.5
// @author 原作者Cowvirgina, Optimized by AI
// @description 优化了跨页加载时按钮消失的问题，修复了卡死和jQuery依赖问题，精确匹配截图所示DOM结构。批量下载检索目录文献。
// @run-at document-idle
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// --- Helper Functions ---
// Function to inject CSS
function addCss(cssString) {
const style = document.createElement('style');
style.textContent = cssString;
document.head.appendChild(style);
}
// Function to create a temporary message box
function createTempMessage(text, duration) {
// Remove any existing temporary messages to avoid clutter
document.querySelectorAll('.temp-message-box').forEach(box => box.remove());
const messageBox = document.createElement('div');
messageBox.className = 'temp-message-box'; // Add a class for easy selection/removal
messageBox.style.cssText = `
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background-color: rgba(0, 0, 0, 0.7);
color: white;
padding: 15px 20px;
border-radius: 8px;
z-index: 9999;
font-size: 16px;
text-align: center;
opacity: 1;
transition: opacity 0.5s ease-in-out;
max-width: 80%; /* Prevent box from being too wide */
`;
messageBox.textContent = text;
document.body.appendChild(messageBox);
// Fade out and remove after duration
setTimeout(() => {
messageBox.style.opacity = '0';
setTimeout(() => {
if (document.body.contains(messageBox)) {
document.body.removeChild(messageBox);
}
}, 500); // Match transition duration
}, duration);
}
// Function for non-blocking delay
function delay(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
// --- Inject initial CSS ---
addCss(`
#hello-box {
display: none; /* Hide initially */
opacity: 0; /* Start transparent for fade-in */
transition: opacity 0.3s ease-in-out; /* Add transition for fade */
position: absolute;
top: 30px; /* Adjusted position relative to batchOpsBox */
right: 0; /* Adjusted position relative to batchOpsBox */
height: auto; /* Adjust height based on content */
width: 280px; /* Slightly wider */
padding: 10px; /* Increased padding */
line-height: 1.5; /* Better line height */
white-space: normal; /* Allow text wrapping */
border: 1px solid rgb(214, 214, 214);
background-color: rgba(255, 0, 0, 0.9); /* More opaque red */
color: white; /* Text color */
box-shadow: 2px 2px 5px rgba(0,0,0,0.3); /* Add subtle shadow */
z-index: 1000; /* Ensure it's above other content */
pointer-events: none; /* Allow clicks to pass through */
}
#hello-box p {
margin: 0; /* Remove default paragraph margin */
text-align: center;
font-size: 14px; /* Slightly smaller font */
overflow-wrap: break-word;
}
#new_downbutton {
float: left;
height: 22px;
padding: 2px 10px;
line-height: 22px;
white-space: nowrap;
border: 1px solid #d6d6d6;
background-color: #ff0000; /* Solid red */
color: white; /* White text */
cursor: pointer;
margin-left: 10px; /* Add some space from other buttons */
}
#new_downbutton:hover {
background-color: #cc0000; /* Darker red on hover */
}
.download-counter {
position: fixed; /* 固定位置 */
bottom: 20px; /* 距离页面底部20px */
right: 20px; /* 距离页面右侧20px */
background-color: rgba(0, 0, 0, 0.7); /* 半透明黑色背景 */
color: white; /* 白色文字 */
padding: 10px 15px; /* 内边距 */
border-radius: 5px; /* 圆角 */
z-index: 9999; /* 确保在其他元素之上 */
font-size: 14px; /* 字体大小 */
box-shadow: 1px 1px 3px rgba(0,0,0,0.3); /* 阴影效果 */
pointer-events: none; /* 允许鼠标事件穿透，不影响点击下方的页面元素 */
min-width: 120px; /* 最小宽度，避免内容变化时抖动 */
text-align: center; /* 文本居中 */
}
`);
// --- Main Logic - Use interval to check for elements ---
// Keep interval running to detect page content updates
let intervalID = setInterval(() => {
const batchOpsBox = document.querySelector("#batchOpsBox");
// Use a more specific selector to find the tbody within #gridTable based on the screenshot
const tableBody = document.querySelector("#gridTable table.result-table-list tbody");
const existingButton = document.getElementById('new_downbutton'); // Use getElementById for slight performance gain
// Condition: batchOpsBox and tableBody must exist, AND our button must NOT exist.
// This handles initial page load and subsequent dynamic page updates.
if (batchOpsBox && tableBody && !existingButton) {
console.log("知网批量下载脚本: Found necessary elements and button is missing. Adding button.");
// --- Add button and explanation ---
const button = document.createElement('a');
button.id = 'new_downbutton';
button.textContent = '批量下载PDF'; // Changed text to be clearer
const hello_box = document.createElement('div');
hello_box.id = "hello-box"; // Make sure ID is set for CSS and JS
const hello_p = document.createElement('p');
hello_p.innerHTML = "<b>批量下载说明：</b><br>" +
"1. 脚本仅处理**当前页面**显示的文献。<br>" + // Emphasize current page
"2. 点击按钮后，脚本会模拟点击每篇文献的下载链接。<br>" +
"3. **浏览器可能会阻止弹出窗口，请允许知网页面弹出新窗口！**<br>" + // More emphasis
"4. 每次下载之间会有短暂延迟（约15秒），请耐心等待。<br>" +
"5. 脚本完成后会提示，但实际下载进度请查看浏览器下载管理器。<br>" +
"6. 翻页后按钮会自动重新出现。"; // Added note about pagination
// Append explanation box and text
// We need to make batchOpsBox position relative for absolute positioning of hello_box
// Check if it already has a position style before overriding
if (!batchOpsBox.style.position || batchOpsBox.style.position === 'static') {
batchOpsBox.style.position = 'relative';
}
// Check if hello_box might be lingering from a previous dynamic update that wasn't a full replace
const oldHelloBox = document.getElementById('hello-box');
if(oldHelloBox && oldHelloBox.parentElement === batchOpsBox) {
batchOpsBox.removeChild(oldHelloBox); // Remove old one if it exists and is in the right place
}
batchOpsBox.appendChild(hello_box);
hello_box.appendChild(hello_p);
// --- Replace jQuery with native JS for mouse events ---
// Add mouseover/mouseout listeners to show/hide the explanation box
button.addEventListener('mouseover', () => {
const targetBox = document.getElementById("hello-box");
if (targetBox) {
targetBox.style.display = 'block'; // First make it visible
// Use a small delay before setting opacity to allow display change to register
setTimeout(() => {
targetBox.style.opacity = '1'; // Then fade in
}, 10); // A small delay like 10ms is often enough
}
});
button.addEventListener('mouseout', () => {
const targetBox = document.getElementById("hello-box");
if (targetBox) {
targetBox.style.opacity = '0'; // Start fade-out
// Hide completely after transition
setTimeout(() => {
// Only hide if opacity is still 0 (means fade-out completed or wasn't interrupted)
if (window.getComputedStyle(targetBox).opacity === '0') {
targetBox.style.display = 'none';
}
}, 300); // Match CSS transition duration
}
});
// --- End of jQuery replacement ---
// Append the button to the batch operations box
batchOpsBox.appendChild(button);
// --- Download Logic ---
button.addEventListener('click', async () => { // Made the click handler async
// Find operat cells within the *current* tableBody
const operatCells = tableBody.querySelectorAll('tr > td.operat');
if (operatCells.length === 0) {
createTempMessage("当前页面未找到任何文献条目。", 3000);
return;
}
// Collect all valid download links first
const downloadLinks = [];
operatCells.forEach(cell => {
// Use the precise selector based on the screenshot relative to the cell
const downloadLink = cell.querySelector("a.downloadlink.icon-download");
// Add a fallback selector if the precise one fails
const fallbackLink = cell.querySelector("a.downloadlink");
let linkToUse = downloadLink || fallbackLink; // Prefer the precise selector
// Check if link element exists AND has a valid href (not empty or just void)
if (linkToUse && linkToUse.href && linkToUse.href !== '' && linkToUse.href !== 'javascript:void(0);') {
downloadLinks.push(linkToUse.href);
} else {
// Log if a potential download cell doesn't have a valid link
console.warn("知网批量下载脚本: Found operat cell without a valid download link:", cell);
}
});
if (downloadLinks.length === 0) {
createTempMessage(`在当前页面 ${operatCells.length} 个条目中未找到有效的下载链接。`, 4000);
return;
}
createTempMessage(`准备开始下载，预计下载文章共 ${downloadLinks.length} 篇。请检查并允许浏览器弹出窗口！`, 6000);
// --- 添加计数窗口 ---
// 移除可能残留的上一次的计数窗口
document.querySelectorAll('.download-counter').forEach(box => box.remove());
const downloadCounterBox = document.createElement('div');
downloadCounterBox.className = 'download-counter';
downloadCounterBox.textContent = `下载进度: 0 / ${downloadLinks.length}`; // 初始化文本
document.body.appendChild(downloadCounterBox);
// --- 计数窗口添加完毕 ---
// Loop through collected links and trigger download with delay
let downloadedCount = 0; // 计数器变量
for (const linkHref of downloadLinks) {
downloadedCount++; // 每尝试下载一次，计数器加1
// --- 更新计数窗口文本 ---
downloadCounterBox.textContent = `下载进度: ${downloadedCount} / ${downloadLinks.length}`;
// --- 计数窗口文本更新完毕 ---
console.log(`尝试下载 (${downloadedCount}/${downloadLinks.length}): ${linkHref}`);
// createTempMessage(`正在尝试下载 (${downloadedCount}/${downloadLinks.length})...`, 1500); // 如果觉得临时提示和计数窗口重复，可以注释或移除这行
window.open(linkHref, '_blank');
if (downloadedCount < downloadLinks.length) {
await delay(8000); // 8 seconds delay between opens
}
}
// --- 下载循环结束，处理计数窗口 ---
// 最后更新一次文本，显示完成状态
downloadCounterBox.textContent = `下载完成: ${downloadLinks.length} / ${downloadLinks.length}`;
// 或者显示一个完成消息
// downloadCounterBox.textContent = `批量下载完成！`;
createTempMessage(`脚本执行完成！已尝试触发 ${downloadLinks.length} 篇文献下载。请检查浏览器下载管理器。`, 7000);
console.log("知网批量下载脚本: Batch download process finished.");
// --- 移除计数窗口 ---
// 在最终提示显示一段时间后移除计数窗口
setTimeout(() => {
if (document.body.contains(downloadCounterBox)) {
document.body.removeChild(downloadCounterBox);
}
}, 3000); // 例如等待3秒后移除
// --- 计数窗口移除完毕 ---
}); // End of button click event listener
}
// If condition is not met, the interval simply finishes this cycle and waits for the next tick.
// It will keep checking until the page is closed or navigated away from.
}, 1000); // Check every 1 second
// Optional: Clear interval when the window/page is unloaded (less critical now that it doesn't block)
// window.addEventListener('beforeunload', () => {
// clearInterval(intervalID);
// });
})();
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