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404 to Archive Redirecter

Detects 404/Not Found pages and redirects to the archived version on archive.org

目前为 2025-04-09 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name         404 to Archive Redirecter
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.2
  5. // @description  Detects 404/Not Found pages and redirects to the archived version on archive.org
  6. // @author       Patryk Kordisch
  7. // @match        *://*/*
  8. // @run-at       document-end
  9. // @exclude      *://web.archive.org/*
  10. // @grant        none
  11. // @license MIT
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.     'use strict';
  16.  
  17.     function is404Page() {
  18.  
  19.         // Check HTTP Status Code using Performance API
  20.         const navEntries = window.performance.getEntriesByType('navigation');
  21.         if (navEntries.length > 0 && navEntries[0].responseStatus === 404) {
  22.             return true;
  23.         }
  24.         return false;
  25.     }
  26.  
  27.  
  28.     // Confirmation dialog
  29.     function offerRedirect(archiveUrl) {
  30.         if (confirm(`This appears to be a missing page.\n\nWould you like to view an archived version?`)) {
  31.             window.location.href = archiveUrl;
  32.         }
  33.     }
  34.  
  35.  
  36.     // If the current page qualifies as a 404 and user confirms it, he gets redirected to the archive
  37.     setTimeout(() => {
  38.         if (is404Page()) {
  39.             // Get URL
  40.             const currentUrl = window.location.href;
  41.             const archiveUrl = "https://web.archive.org/web/" + currentUrl;
  42.  
  43.             setTimeout(() => offerRedirect(archiveUrl), 500);
  44.         }
  45.     }, 2000);
  46.  
  47. })();