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DLE links decoder

Прямые ссылки на сайтах с движком DataLife Engine (DLE)

当前为 2016-08-29 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         DLE links decoder
  3. // @namespace    lainscripts_dle_links_decoder
  4. // @version      1.2
  5. // @description  Прямые ссылки на сайтах с движком DataLife Engine (DLE)
  6. // @author       lainverse
  7. // @match        *://*/*
  8. // @grant        none
  9. // ==/UserScript==
  10. // Script based on a similar script by raletag:
  11. // https://greasyfork.org/en/scripts/22290-Прямые-ссылки-в-dle
  12.  
  13. (function() {
  14.     'use strict';
  15.  
  16.     var impCodes = '%3B%2C%2F%3F%3A%40%26%3D%2B%24%23',
  17.         impRegex = new RegExp((impCodes.replace(/%/g,'|%').replace('|','')), 'gi'),
  18.         impDecoded = decodeURIComponent(impCodes),
  19.         impReplacer = function(ch) {
  20.             return impDecoded[impCodes.indexOf(ch.toUpperCase())/3];
  21.         };
  22.     function decodeImportant(text) {
  23.         return text.replace(impRegex, impReplacer);
  24.     }
  25.  
  26.     function linkHandler(e){
  27.         var link = e.target, url = link.href, url64;
  28.  
  29.         // Detach event from a link since we don't need to parse it more than once
  30.         link.removeEventListener('mouseenter', linkHandler, false);
  31.  
  32.         // Check if it's one of the DLE-redirected links and exit if not
  33.         url64 = (url.match(/([?&]url=|\/leech_out\.php\?.:)([^&]+)(&|$)/i)||[])[2];
  34.         if (!url64) {
  35.             return true;
  36.         }
  37.  
  38.         // Try to decode base64 encoded link, if fails then take it as-is
  39.         try {
  40.             url64 = decodeURIComponent(url64);
  41.             url = window.atob(url64);
  42.         } catch(ignore) {
  43.             url = url64;
  44.         }
  45.  
  46.         // Decode important %-encoded parts of a link (browser should handle the rest)
  47.         url = decodeImportant(url);
  48.  
  49.         // Replace target with decoded link and make it open in a new tab by default
  50.         console.log('Replaced ' + link.href + ' with ' + url);
  51.         link.href = url;
  52.         link.target = '_blank';
  53.  
  54.         return true;
  55.     }
  56.  
  57.     // Get a list of all link in a given object and attach mouseover event to it
  58.     function attachEventToLinks(root) {
  59.         var links = root.querySelectorAll('a[href]'),
  60.             i = links.length;
  61.         while(i--) {
  62.             links[i].addEventListener('mouseenter', linkHandler, false);
  63.         }
  64.     }
  65.  
  66.     // Parse all existing links
  67.     attachEventToLinks(document.body);
  68.  
  69.     // Monitor changes to the document structure and attach events to all new links
  70.     var o = new MutationObserver(function(ms){
  71.         ms.forEach(function(m){
  72.             m.addedNodes.forEach(function(n){
  73.                 if (n.nodeType !== Node.ELEMENT_NODE) {
  74.                     return; // parse only document elements and skip the rest
  75.                 }
  76.                 if (n.href) {
  77.                     n.addEventListener('mouseenter', linkHandler, false);
  78.                     return; // if node is a link attach event and exit since we
  79.                     // don't want to parse link's content (links within links?!)
  80.                 }
  81.                 attachEventToLinks(n);
  82.             });
  83.         });
  84.     });
  85.     o.observe(document.body, {childList: true, subtree: true});
  86. })();