/// ------- Request Interceptor Script -------------- /// 轻量级网络请求拦截器，不破坏网页正常功能 (function() { 'use strict'; if (window._sctRequestInterceptorInstalled) { console.log('[SCToolbox] Request interceptor already installed'); return; } window._sctRequestInterceptorInstalled = true; // 被屏蔽的域名和路径 const blockedPatterns = [ 'google-analytics.com', 'www.google.com/ccm/collect', 'www.google.com/pagead', 'www.google.com/ads', 'googleapis.com', 'doubleclick.net', 'reddit.com/rp.gif', 'alb.reddit.com', 'pixel-config.reddit.com', 'conversions-config.reddit.com', 'redditstatic.com/ads', 'analytics.tiktok.com', 'googletagmanager.com', 'facebook.com', 'facebook.net', 'gstatic.com/firebasejs' ]; // 判断 URL 是否应该被屏蔽 const shouldBlock = (url) => { if (!url || typeof url !== 'string') return false; const urlLower = url.toLowerCase(); return blockedPatterns.some(pattern => urlLower.includes(pattern.toLowerCase())); }; // 记录被拦截的请求 const logBlocked = (type, url) => { console.log(`[SCToolbox] ❌ Blocked ${type}:`, url); }; const TRANSPARENT_GIF = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7'; // ============ 1. 拦截 Fetch API ============ const originalFetch = window.fetch; window.fetch = function(...args) { const url = typeof args[0] === 'string' ? args[0] : args[0]?.url; if (shouldBlock(url)) { logBlocked('fetch', url); return Promise.reject(new Error('Blocked by SCToolbox')); } return originalFetch.apply(this, args); }; // ============ 2. 拦截 XMLHttpRequest ============ const OriginalXHR = window.XMLHttpRequest; const originalXHROpen = OriginalXHR.prototype.open; const originalXHRSend = OriginalXHR.prototype.send; OriginalXHR.prototype.open = function(method, url, ...rest) { this._url = url; if (shouldBlock(url)) { logBlocked('XHR', url); this._blocked = true; } return originalXHROpen.apply(this, [method, url, ...rest]); }; OriginalXHR.prototype.send = function(...args) { if (this._blocked) { setTimeout(() => { const errorEvent = new Event('error'); this.dispatchEvent(errorEvent); }, 0); return; } return originalXHRSend.apply(this, args); }; // ============ 3. 拦截 Image 元素的 src 属性 ============ const imgSrcDescriptor = Object.getOwnPropertyDescriptor(HTMLImageElement.prototype, 'src'); if (imgSrcDescriptor && imgSrcDescriptor.set) { Object.defineProperty(HTMLImageElement.prototype, 'src', { get: imgSrcDescriptor.get, set: function(value) { if (shouldBlock(value)) { logBlocked('IMG.src', value); // 设置为透明 GIF，避免请求 imgSrcDescriptor.set.call(this, TRANSPARENT_GIF); this.style.cssText += 'display:none !important;width:0;height:0;'; return; } return imgSrcDescriptor.set.call(this, value); }, configurable: true, enumerable: true }); } // ============ 3.5. 拦截 Script 元素的 src 属性 ============ const scriptSrcDescriptor = Object.getOwnPropertyDescriptor(HTMLScriptElement.prototype, 'src'); if (scriptSrcDescriptor && scriptSrcDescriptor.set) { Object.defineProperty(HTMLScriptElement.prototype, 'src', { get: scriptSrcDescriptor.get, set: function(value) { if (shouldBlock(value)) { logBlocked('SCRIPT.src', value); // 阻止加载，不设置 src this.type = 'javascript/blocked'; return; } return scriptSrcDescriptor.set.call(this, value); }, configurable: true, enumerable: true }); } // ============ 4. 拦截 setAttribute（用于 img.setAttribute('src', ...)）============ const originalSetAttribute = Element.prototype.setAttribute; Element.prototype.setAttribute = function(name, value) { if (name.toLowerCase() === 'src' && this.tagName === 'IMG' && shouldBlock(value)) { logBlocked('IMG setAttribute', value); originalSetAttribute.call(this, name, TRANSPARENT_GIF); this.style.cssText += 'display:none !important;width:0;height:0;'; return; } if (name.toLowerCase() === 'src' && this.tagName === 'SCRIPT' && shouldBlock(value)) { logBlocked('SCRIPT setAttribute', value); return; // 阻止设置 } return originalSetAttribute.call(this, name, value); }; // ============ 5. 拦截 navigator.sendBeacon ============ if (navigator.sendBeacon) { const originalSendBeacon = navigator.sendBeacon.bind(navigator); navigator.sendBeacon = function(url, data) { if (shouldBlock(url)) { logBlocked('sendBeacon', url); return true; // 假装成功 } return originalSendBeacon(url, data); }; } // ============ 6. 使用 MutationObserver 监听动态添加的元素 ============ const observer = new MutationObserver((mutations) => { mutations.forEach((mutation) => { mutation.addedNodes.forEach((node) => { if (node.nodeType !== 1) return; // 只处理元素节点 try { // 检查 IMG 元素 if (node.tagName === 'IMG') { const src = node.getAttribute('src') || node.src; if (src && shouldBlock(src)) { logBlocked('Dynamic IMG', src); node.src = TRANSPARENT_GIF; node.style.cssText += 'display:none !important;width:0;height:0;'; } } // 检查 SCRIPT 元素 else if (node.tagName === 'SCRIPT') { const src = node.getAttribute('src'); if (src && shouldBlock(src)) { logBlocked('Dynamic SCRIPT', src); node.type = 'javascript/blocked'; node.removeAttribute('src'); } } // 检查 IFRAME 元素 else if (node.tagName === 'IFRAME') { const src = node.getAttribute('src'); if (src && shouldBlock(src)) { logBlocked('Dynamic IFRAME', src); node.src = 'about:blank'; node.style.cssText += 'display:none !important;'; } } // 递归检查子元素 if (node.querySelectorAll) { node.querySelectorAll('img').forEach(img => { const src = img.getAttribute('src') || img.src; if (src && shouldBlock(src)) { logBlocked('Child IMG', src); img.src = TRANSPARENT_GIF; img.style.cssText += 'display:none !important;width:0;height:0;'; } }); node.querySelectorAll('script[src]').forEach(script => { const src = script.getAttribute('src'); if (src && shouldBlock(src)) { logBlocked('Child SCRIPT', src); script.type = 'javascript/blocked'; script.removeAttribute('src'); } }); } } catch (e) { // 忽略错误 } }); }); }); // 延迟启动 observer，等待页面初始化完成 const startObserver = () => { if (document.body) { observer.observe(document.documentElement, { childList: true, subtree: true }); console.log('[SCToolbox] ✅ MutationObserver started'); } else { setTimeout(startObserver, 50); } }; if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', startObserver); } else { startObserver(); } console.log('[SCToolbox] ✅ Request interceptor installed'); console.log('[SCToolbox] 🛡️ Blocking', blockedPatterns.length, 'patterns'); })();