☰

HOOK

HOOK API

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greatest.deepsurf.us/scripts/40863/266172/HOOK.js 

  1. // ==UserScript==
  2. // @name         HOOK
  3. // @namespace    http://www.infosec-wiki.com/
  4. // @version      1.3
  5. // @description  HOOK API
  6. // @author       http://www.infosec-wiki.com/
  7. // @match        *
  8. // @run-at       document-start
  9.  
  10. function Hooks() {
  11. 	return {
  12. 		initEnv:function () {
  13. 			Function.prototype.hook = function (realFunc,hookFunc, run, context,funcName) {
  14. 				var _context = null; //函數上下文
  15. 				var _funcName = null; //函數名
  16.  
  17. 				_context = context || window;
  18. 				//_context = context || unsafeWindow;
  19.  
  20. 				_funcName = funcName || getFuncName(this);
  21. 				_context[realFunc] = this;
  22.  
  23. 				if(_context[_funcName].prototype && _context[_funcName].prototype.isHooked)
  24. 				{
  25. 					console.log("Already has been hooked,unhook first");
  26. 					return false;
  27. 				}
  28.  
  29. 				function getFuncName (fn) {
  30. 					// 獲取函數名稱
  31. 					var strFunc = fn.toString();
  32. 					var _regex = /function\s+(\w+)\s*\(/;
  33. 					var patten = strFunc.match(_regex);
  34. 					if (patten) {
  35. 						return patten[1];
  36. 					};
  37. 					return '';
  38. 				}
  39.  
  40. 				try {
  41. 					if (run) {
  42. 						eval('_context[_funcName] = function ' + _funcName + '(){\n' +
  43. 							'var args = Array.prototype.slice.call(arguments,0);\n' +
  44. 							'var obj = this;\n' +
  45. 							'hookFunc.apply(obj,args)\n' +
  46. 							'return _context[realFunc].apply(obj,args);\n' +
  47. 							'};');
  48. 					}else {
  49. 						eval('_context[_funcName] = function ' + _funcName + '(){\n' +
  50. 							'var args = Array.prototype.slice.call(arguments,0);\n' +
  51. 							'var obj = this;\n' +
  52. 							'hookFunc.apply(obj,args)\n' +
  53. 							'};');
  54. 					}
  55. 					_context[_funcName].prototype.isHooked = true;
  56. 					return true;
  57. 				}catch (e)
  58. 				{
  59. 					console.log("Hook failed,check the params.");
  60. 					return false;
  61. 				}
  62. 			};
  63. 			Function.prototype.unhook = function (realFunc,funcName,context) {
  64. 				var _context = null;
  65. 				var _funcName = null;
  66. 				_context = context || window;
  67. 				_funcName = funcName;
  68. 				if (!_context[_funcName].prototype.isHooked)
  69. 				{
  70. 					console.log("No function is hooked on");
  71. 					return false;
  72. 				}
  73. 				_context[_funcName] = _context[realFunc];
  74. 				delete _context[realFunc];
  75. 				return true;
  76. 			};
  77. 		},
  78. 		cleanEnv:function () {
  79. 			if(Function.prototype.hasOwnProperty("hook"))
  80. 			{
  81. 				delete Function.prototype.hook;
  82. 			}
  83. 			if(Function.prototype.hasOwnProperty("unhook"))
  84. 			{
  85. 				delete Function.prototype.unhook;
  86. 			}
  87. 			return true;
  88. 		}
  89. 	};
  90. }