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UserScript XHR Hook Framework

This script is intended to work with @require only. Once required this can be used to listen for XHR events using window.UserScript.OnXHR.addEventListener((event) => {});

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/440220/1019651/UserScript%20XHR%20Hook%20Framework.js 

  1. // ==UserScript==
  2. // @namespace    Xortrox/UserScripts/HookXHR
  3. // @name         UserScript XHR Hook Framework
  4. // @version      0.1
  5. // @description  This script is intended to work with @require only. Once required this can be used to listen for XHR events using window.UserScript.OnXHR.addEventListener((event) => {});
  6. // @author       Xortrox
  7. // @match        *
  8. // @esversion:   6
  9. // @license MIT
  10. // ==/UserScript==
  11.  
  12. class HookXHR {
  13. 	constructor() {
  14. 		let rawSend = XMLHttpRequest.prototype.send;
  15.  
  16. 		XMLHttpRequest.prototype.send = function() {
  17. 			if (!this._hooked) {
  18. 				this._hooked = true;
  19.  
  20. 				this.addEventListener('readystatechange', function() {
  21. 					if (this.readyState === XMLHttpRequest.DONE) {
  22. 						setupHook(this);
  23. 					}
  24. 				}, false);
  25. 			}
  26. 			rawSend.apply(this, arguments);
  27. 		}
  28.  
  29. 		function setupHook(xhr) {
  30. 			if (window.elethorGeneralPurposeOnXHR) {
  31. 				const e = new Event('UserScriptXHR');
  32. 				e.xhr = xhr;
  33.  
  34. 				window.UserScript.OnXHR.dispatchEvent(e);
  35. 			}
  36. 		}
  37. 		
  38. 	}
  39. }
  40.  
  41. if (!window.UserScript) {
  42. 	window.UserScript = {};
  43. }
  44.  
  45. /** 
  46.  * Can be used to listen for XHR requests
  47.  * the event parameter will contain an xhr field which is the XMLHttpRequest.send itself
  48.  * 
  49.  * window.UserScript.OnXHR.addEventListener((event) => {
  50.  * 		console.log(event.xhr);
  51.  * });
  52.  * */
  53. window.UserScript.OnXHR = new EventTarget();
  54. const hookXHR = new HookXHR();