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一键批量下载孔夫子旧书网商品图片(无水印版本)
当前为
// ==UserScript==
// @name 孔夫子旧书网无水印图片下载助手
// @description 一键批量下载孔夫子旧书网商品图片(无水印版本)
// @version 1.0.5
// @author 骄阳哥
// @namespace jyg
// @match *://search.kongfz.com/product_result/*
// @match *://book.kongfz.com/*
// @match *://item.kongfz.com/book/*
// @grant GM_addStyle
// @grant GM_download
// @grant GM_xmlhttpRequest
// @connect www0.kfzimg.com
// @connect *
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// 当前页面URL
const currentUrl = window.location.href;
// 在顶部添加常量定义
const STORAGE_KEY = 'kfz_crop_height';
const DEFAULT_CROP_HEIGHT = 110;
// 获取裁剪高度设置
function getCropHeight() {
const saved = localStorage.getItem(STORAGE_KEY);
return saved ? parseInt(saved) : DEFAULT_CROP_HEIGHT;
}
// 移除图片水印
function removeImageWatermark(imgUrl) {
return imgUrl.replace(/(_water|_n|_p|_b|_s)/g, '');
}
// 创建商品详情页下载按钮
function createDetailPageButton(images) {
const container = document.createElement('div');
container.id = 'kfz-download-container';
// 创建设置区域
const settingDiv = document.createElement('div');
settingDiv.className = 'crop-setting';
const label = document.createElement('label');
label.innerText = '裁剪高度(px):';
const input = document.createElement('input');
input.type = 'number';
input.min = '0';
input.value = getCropHeight();
input.className = 'crop-height-input';
input.addEventListener('change', (e) => {
const value = parseInt(e.target.value);
if(value >= 0) {
localStorage.setItem(STORAGE_KEY, value);
}
});
settingDiv.appendChild(label);
settingDiv.appendChild(input);
// 创建下载按钮
const btn = document.createElement('button');
btn.innerText = `📥 下载全部图片(${images.length}张)`;
btn.id = 'kfz-download-btn';
btn.style.backgroundColor = '#1890ff';
btn.style.color = 'white';
container.appendChild(settingDiv);
container.appendChild(btn);
document.body.appendChild(container);
return btn;
}
// 创建索页面下载按钮
function createSearchPageButton(doc, item) {
const btn = doc.createElement('button');
btn.innerText = '📥 下载图片';
btn.className = 'kfz-search-download-btn';
btn.style.backgroundColor = '#1890ff';
const cartBtn = item.querySelector('div.add-cart-btn');
cartBtn.parentNode.insertBefore(btn, cartBtn);
return btn;
}
// 创建书籍列表页下载按钮
function createListPageButton(doc, item) {
const btn = doc.createElement('button');
btn.innerText = '📥 下载图片';
btn.className = 'kfz-list-download-btn';
btn.style.backgroundColor = '#1890ff';
const cartBtn = item.querySelector('a.con-btn-cart');
cartBtn.parentNode.insertBefore(btn, cartBtn.nextSibling);
return btn;
}
// 获取商品图片列表
function getBookImages(doc) {
const imgItems = doc.querySelectorAll('ul#figure-info-box > li');
return Array.from(imgItems, item => {
const img = item.querySelector('img');
const imgSrc = img ? img.getAttribute('_viewsrc') : null;
return removeImageWatermark(imgSrc);
});
}
// 修改本地图片裁剪函数
function cropLocalImage(imageUrl) {
return new Promise((resolve, reject) => {
const img = new Image();
img.crossOrigin = 'anonymous'; // 允许跨域
img.onload = () => {
// 创建 canvas 进行裁剪
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
// 使用保存的裁剪高度
const cropHeight = getCropHeight();
canvas.width = img.width;
canvas.height = img.height - cropHeight;
// 绘制裁剪后的图片
ctx.drawImage(img, 0, 0);
// 转换为 blob
canvas.toBlob(blob => {
resolve(blob);
}, 'image/jpeg', 0.95);
};
img.onerror = reject;
img.src = imageUrl;
});
}
// 添加延时函数
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
// 下载图片
function downloadImages(doc, btn) {
const images = getBookImages(doc);
if(images.length === 0) {
console.warn('未找到可下载的图片');
btn.innerText = '😅 暂无可下载的图片';
btn.style.backgroundColor = '#999';
btn.disabled = true;
return;
}
console.log(`找到${images.length}张图片待下载:`, images);
btn.innerText = '下载中...';
btn.disabled = true;
btn.style.backgroundColor = '#1890ff';
let successCount = 0;
let failCount = 0;
// 获取书名和ISBN
const bookName = doc.querySelector('h1')?.innerText || '未知书名';
const isbnInfo = doc.querySelector('meta[name="description"]').getAttribute('content').match(/ISBN：([0-9]*)/);
const isbn = isbnInfo?.[1] || '';
console.log('书籍信息:', {
bookName,
isbn
});
// 串行下载图片,添加重试和延迟
async function downloadWithRetry(url, retryCount = 1, hasWatermark = false) {
const ext = url.split('.').pop()?.toLowerCase() || 'jpg';
const watermarkText = hasWatermark ? '-裁剪' : '';
const fileName = `${bookName.trim()}-${isbn.trim()}-${successCount + 1}${watermarkText}.${ext}`;
try {
if(!hasWatermark) {
// 尝试下载无水印版本
await new Promise((resolve, reject) => {
GM_download({
url,
name: fileName,
onload: resolve,
onerror: reject
});
});
successCount++;
console.log(`无水印图片下载成功:`, {url, fileName});
} else {
// 下载并裁剪带水印版本
const blob = await cropLocalImage(url);
const downloadUrl = URL.createObjectURL(blob);
await new Promise((resolve, reject) => {
GM_download({
url: downloadUrl,
name: fileName,
onload: () => {
URL.revokeObjectURL(downloadUrl);
resolve();
},
onerror: (err) => {
URL.revokeObjectURL(downloadUrl);
reject(err);
}
});
});
successCount++;
console.log(`裁剪图片下载成功:`, {url, fileName});
}
} catch(err) {
console.warn(`图片下载失败 (${retryCount}次重试机会):`, {url, error: err});
if(retryCount > 0) {
const delay = 1000 + Math.random() * 2000;
await sleep(delay);
if(!hasWatermark) {
const watermarkUrl = url.replace(/\.([^.]*)$/, '_b.$1');
return downloadWithRetry(watermarkUrl, retryCount - 1, true);
} else {
const otherWatermarkUrl = url.replace(/_b\./, '_p.');
return downloadWithRetry(otherWatermarkUrl, retryCount - 1, true);
}
} else {
failCount++;
console.error('图片下载失败:', {url, error: err});
}
}
// 更新按钮状态
btn.innerText = `下载中...(${successCount}/${images.length})`;
if(successCount + failCount === images.length) {
if(failCount === 0) {
btn.innerText = `✅ ${successCount}张图片已下载`;
btn.style.backgroundColor = '#52c41a';
} else {
btn.innerText = `⚠️ ${successCount}张成功, ${failCount}张失败`;
btn.style.backgroundColor = '#faad14';
}
btn.disabled = false;
}
}
// 串行下载所有图片
(async () => {
for(const imgUrl of images) {
if(!imgUrl) {
failCount++;
continue;
}
await downloadWithRetry(imgUrl);
// 添加随机延迟
await sleep(500 + Math.random() * 1000);
}
})();
}
// 从URL获取并下载图片
function downloadFromUrl(url, btn) {
btn.addEventListener('click', () => {
console.log('开始获取页面:', url);
GM_xmlhttpRequest({
method: 'GET',
url: url,
onload: response => {
console.log('页面获取成功:', {
url,
status: response.status
});
const parser = new DOMParser();
const doc = parser.parseFromString(response.responseText, 'text/html');
downloadImages(doc, btn);
},
onerror: err => {
console.error('页面获取失败:', {
url,
error: err
});
btn.innerText = '❌ 获取图片失败';
}
});
});
}
// 处理搜索页面
function handleSearchPage(item) {
const link = item.querySelector('.item-info > .title > a');
const btn = createSearchPageButton(document, item);
downloadFromUrl(link.href, btn);
}
// 处理列表页面
function handleListPage(item) {
const link = item.querySelector('div.list-con-title > a');
const btn = createListPageButton(document, item);
downloadFromUrl(link.href, btn);
}
// 初始化页面
let checkInterval;
if(currentUrl.includes('book.kongfz.com')) {
const btn = createDetailPageButton(getBookImages(document));
btn.addEventListener('click', () => downloadImages(document, btn));
}
else if(currentUrl.includes('search.kongfz.com/product_result')) {
checkInterval = setInterval(() => {
const listBox = document.querySelector('#listBox');
if(listBox) {
clearInterval(checkInterval);
document.querySelectorAll('#listBox .item')
.forEach(item => handleSearchPage(item));
}
}, 1000);
}
else if(currentUrl.includes('item.kongfz.com/book')) {
checkInterval = setInterval(() => {
const listBox = document.querySelector('ul.itemList');
if(listBox) {
clearInterval(checkInterval);
document.querySelectorAll('ul.itemList > li')
.forEach(item => handleListPage(item));
}
}, 1000);
}
// 注入样式
GM_addStyle(`
#kfz-download-btn {
padding: 12px 24px;
border: none;
border-radius: 6px;
cursor: pointer;
font-size: 14px;
box-shadow: 0 2px 8px rgba(0,0,0,0.15);
transition: all 0.3s;
width: 100%;
}
#kfz-download-btn:hover {
transform: translateY(-2px);
box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.kfz-search-download-btn,
.kfz-list-download-btn {
padding: 4px 12px;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 12px;
margin: 0 8px;
transition: all 0.3s;
}
.kfz-search-download-btn:hover,
.kfz-list-download-btn:hover {
opacity: 0.8;
}
button:disabled {
background-color: #999 !important;
cursor: not-allowed;
opacity: 0.7;
}
#kfz-download-container {
position: fixed;
bottom: 30px;
right: 30px;
display: flex;
flex-direction: column;
align-items: stretch;
gap: 10px;
z-index: 9999;
min-width: 200px;
}
.crop-setting {
background: white;
padding: 8px 12px;
border-radius: 6px;
box-shadow: 0 2px 8px rgba(0,0,0,0.15);
display: flex;
align-items: center;
gap: 8px;
width: 100%;
}
.crop-height-input {
width: 60px;
padding: 4px;
border: 1px solid #d9d9d9;
border-radius: 4px;
}
.crop-height-input:focus {
border-color: #1890ff;
outline: none;
}
`);
})();