Automatically refreshes page when network errors occur
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.greasyfork.org/scripts/551832/1673255/Auto%20Refresh%20on%20Network%20Errors.js
// ==UserScript==
// @name Auto Refresh on Network Errors
// @namespace http://tampermonkey.net/
// @version 1.1
// @description Automatically refreshes page when network errors occur - Retries indefinitely
// @author Assistant Pro
// @match *://*/*
// @grant none
// @run-at document-start
// ==/UserScript==
(function() {
'use strict';
const config = {
enableConsoleLogs: true,
refreshDelay: 5000, // 5 seconds delay before refresh
checkInterval: 3000, // Check every 3 seconds
retryDelay: 10000, // Wait 10 seconds between retries
enableSoundAlert: false // Play sound when network recovers
};
let state = {
refreshCount: 0,
lastRefreshTime: 0,
isNetworkError: false,
lastCheckTime: Date.now()
};
// Network error patterns to detect
const networkErrorPatterns = [
"We're having trouble finding that site",
"We can't connect to the server",
"Try again later",
"Check your network connection",
"behind a firewall",
"This site can't be reached",
"Unable to connect",
"Server not found",
"Network Error",
"ERR_CONNECTION_",
"ERR_NAME_NOT_RESOLVED",
"ERR_INTERNET_DISCONNECTED",
"Problem loading page",
"The connection has timed out",
"The site is temporarily unavailable"
];
// Check if current page shows network error
function isNetworkErrorPage() {
// Check page title
const title = document.title.toLowerCase();
if (title.includes("problem loading") ||
title.includes("not found") ||
title.includes("unable to connect") ||
title.includes("server not found") ||
title.includes("this site can't be reached")) {
return true;
}
// Check body text content
const bodyText = document.body.innerText.toLowerCase();
for (const pattern of networkErrorPatterns) {
if (bodyText.includes(pattern.toLowerCase())) {
return true;
}
}
// Check common error elements
const errorSelectors = [
'[class*="error"]',
'[id*="error"]',
'[class*="offline"]',
'[id*="offline"]',
'.network-error',
'.dns-error',
'.connection-error',
'.error-page',
'.http-error'
];
for (const selector of errorSelectors) {
const elements = document.querySelectorAll(selector);
for (const element of elements) {
const text = element.innerText.toLowerCase();
for (const pattern of networkErrorPatterns) {
if (text.includes(pattern.toLowerCase())) {
return true;
}
}
}
}
return false;
}
// Check network connectivity
function checkNetworkConnectivity() {
return new Promise((resolve) => {
// Method 1: Navigator online status
if (!navigator.onLine) {
resolve(false);
return;
}
// Method 2: Try to fetch a small resource
const testUrls = [
'https://www.google.com/favicon.ico?t=' + Date.now(),
'https://www.cloudflare.com/favicon.ico?t=' + Date.now(),
'https://www.microsoft.com/favicon.ico?t=' + Date.now()
];
let successCount = 0;
let completed = 0;
testUrls.forEach(url => {
fetch(url, {
method: 'HEAD',
cache: 'no-store',
mode: 'no-cors'
})
.then(() => {
successCount++;
})
.catch(() => {})
.finally(() => {
completed++;
if (completed === testUrls.length) {
resolve(successCount > 0);
}
});
});
// Timeout after 5 seconds
setTimeout(() => {
resolve(successCount > 0);
}, 5000);
});
}
// Perform smart refresh - NO MAX RETRY LIMIT
function performSmartRefresh() {
const now = Date.now();
const timeSinceLastRefresh = now - state.lastRefreshTime;
// Don't refresh too frequently
if (timeSinceLastRefresh < config.retryDelay) {
if (config.enableConsoleLogs) console.log(`⏳ Too soon to refresh, waiting... (${Math.round((config.retryDelay - timeSinceLastRefresh)/1000)}s)`);
return;
}
state.refreshCount++;
state.lastRefreshTime = now;
state.isNetworkError = true;
if (config.enableConsoleLogs) {
console.log(`🔄 Auto-refresh attempt ${state.refreshCount} (Retrying until death)`);
console.log("🌐 Network error detected, refreshing page...");
}
// Play sound alert if enabled
if (config.enableSoundAlert) {
playNotificationSound();
}
// Refresh with a small delay
setTimeout(() => {
if (config.enableConsoleLogs) console.log("🔥 FORCING REFRESH NOW!");
window.location.reload();
}, config.refreshDelay);
}
// Play notification sound
function playNotificationSound() {
try {
const audioContext = new (window.AudioContext || window.webkitAudioContext)();
const oscillator = audioContext.createOscillator();
const gainNode = audioContext.createGain();
oscillator.connect(gainNode);
gainNode.connect(audioContext.destination);
oscillator.frequency.value = 800;
oscillator.type = 'sine';
gainNode.gain.setValueAtTime(0.3, audioContext.currentTime);
gainNode.gain.exponentialRampToValueAtTime(0.01, audioContext.currentTime + 0.5);
oscillator.start(audioContext.currentTime);
oscillator.stop(audioContext.currentTime + 0.5);
} catch (error) {
// Sound not supported, continue silently
}
}
// Main monitoring function - RETRY UNTIL DEATH
function monitorNetworkStatus() {
const now = Date.now();
// Check if we're on a network error page
if (isNetworkErrorPage()) {
if (config.enableConsoleLogs && !state.isNetworkError) {
console.log("🚨 NETWORK ERROR PAGE DETECTED! Starting infinite retry...");
}
// Check if we actually have network connectivity
checkNetworkConnectivity().then(isOnline => {
if (isOnline) {
if (config.enableConsoleLogs) console.log("✅ Network is online, but page failed to load - REFRESHING!");
performSmartRefresh();
} else {
if (config.enableConsoleLogs) console.log("🌐 Network is offline, waiting for connection...");
// Wait for network to come back online and retry
setTimeout(() => {
if (config.enableConsoleLogs) console.log("🔄 Checking again after offline period...");
monitorNetworkStatus();
}, config.retryDelay);
return;
}
});
} else {
// Reset counter if page loaded successfully
if (state.isNetworkError) {
state.isNetworkError = false;
if (config.enableConsoleLogs) console.log(`✅ Page loaded successfully after ${state.refreshCount} attempts! Continuing to monitor...`);
state.refreshCount = 0;
}
}
// Continue monitoring FOREVER
setTimeout(monitorNetworkStatus, config.checkInterval);
}
// Setup event listeners
function setupEventListeners() {
// Listen for online/offline events
window.addEventListener('online', () => {
if (config.enableConsoleLogs) console.log("🌐 NETWORK CONNECTION RESTORED!");
if (state.isNetworkError) {
if (config.enableConsoleLogs) console.log("🔄 Network restored, refreshing page in 3 seconds...");
setTimeout(() => {
if (config.enableConsoleLogs) console.log("🔥 REFRESHING AFTER NETWORK RECOVERY!");
window.location.reload();
}, 3000);
}
});
window.addEventListener('offline', () => {
if (config.enableConsoleLogs) console.log("🌐 NETWORK CONNECTION LOST!");
state.isNetworkError = true;
});
// Listen for page load errors
window.addEventListener('error', (event) => {
const error = event.error || event;
const errorMsg = error.toString();
if (errorMsg.includes('Loading') || errorMsg.includes('Network') || errorMsg.includes('Fetch')) {
if (config.enableConsoleLogs) console.log("🚨 Page load error detected:", errorMsg);
state.isNetworkError = true;
}
});
// Listen for fetch errors
const originalFetch = window.fetch;
window.fetch = function(...args) {
return originalFetch.apply(this, args)
.catch(error => {
if (config.enableConsoleLogs) console.log("🌐 Fetch error detected");
state.isNetworkError = true;
throw error;
});
};
// Listen for XMLHttpRequest errors
const originalXHROpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function(...args) {
this.addEventListener('error', () => {
if (config.enableConsoleLogs) console.log("🌐 XHR error detected");
state.isNetworkError = true;
});
return originalXHROpen.apply(this, args);
};
}
// Initialize
function init() {
if (config.enableConsoleLogs) {
console.log("🔄 AUTO REFRESH ON NETWORK ERRORS - STARTED");
console.log("🔥 WILL RETRY UNTIL DEATH - NO LIMITS");
console.log("🌐 Current network status:", navigator.onLine ? "ONLINE" : "OFFLINE");
console.log("🔧 Monitoring all pages for network errors...");
}
setupEventListeners();
// Start monitoring - WILL NEVER STOP
setTimeout(monitorNetworkStatus, 2000);
// Add status display
if (config.enableConsoleLogs) {
const statusDiv = document.createElement('div');
statusDiv.innerHTML = `
<div style="
position: fixed;
top: 10px;
left: 10px;
background: #ff4444;
color: white;
padding: 10px;
border-radius: 5px;
font-family: Arial;
font-size: 12px;
z-index: 9999;
border: 2px solid #cc0000;
">
🔄 AUTO-REFRESH ACTIVE<br>
Retries: <span id="retryCount">0</span><br>
Status: <span id="networkStatus">MONITORING</span>
</div>
`;
document.body.appendChild(statusDiv);
// Update status display
setInterval(() => {
const retryElement = document.getElementById('retryCount');
const statusElement = document.getElementById('networkStatus');
if (retryElement) retryElement.textContent = state.refreshCount;
if (statusElement) {
statusElement.textContent = state.isNetworkError ? 'RETRYING' : 'MONITORING';
statusElement.style.color = state.isNetworkError ? '#ffcc00' : '#00ff00';
}
}, 1000);
}
}
// Start the script IMMEDIATELY
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
// Emergency fallback - if somehow monitoring stops, restart it
setInterval(() => {
if (!state.lastCheckTime || (Date.now() - state.lastCheckTime > 30000)) {
if (config.enableConsoleLogs) console.log("🔄 EMERGENCY RESTART OF MONITORING");
state.lastCheckTime = Date.now();
monitorNetworkStatus();
}
}, 15000);
})();