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README
Apache-2.0

Hooker JS gitee.png github.png

用于劫持方法,对目标进行 AOP 切面操作
基于 ES5 语法,用于快速开发


快速入门

eHook.hookBefore(window,'alert',function(method,args){
	args[0] = args[0] + '[被劫持的参数]';
});
alert('hello eHook'); // hello eHook[被劫持的参数]

全局对象:eHookaHook

  • eHook:包含aop劫持的基本方法
  • aHook:包含 Ajax Url 劫持的基本方法

引入方法

  1. 下载源码中的 hooker.jshooker-mini.js 位于目录 /build,然后通过 <script> 标签引入,该方式引入即为全局对象:eHookaHook
  2. npm / yarn 引入
    	npm i @palerock/hooker-js
    	# 或
    	yarn add @palerock/hooker-js
    然后通过 import 或 require 引入
    	var hookJS = require('@palerock/hooker-js');
    	var eHook = hookJS.eHook;
    	var aHook = hookJS.aHook;
    	// more...

API 文档

eHook对象

hookBefore(parent, methodName, before, context)

在指定方法前执行

parent: 类型:object,必须,指定方法所在的对象

methodName: 类型:string,必须,指定方法的名称

before: 类型:function,必须,回调方法,该方法在指定方法运行前执行 回调参数:

  • method: 指定的原方法
  • args: 原方法运行的参数(在此改变参数值会影响后续指定方法的参数值)

context:
类型:object,可选,回调方法的上下文

返回值:
类型:number,劫持id(用于解除劫持)


hookCurrent(parent, methodName, current, context)

劫持方法的运行,在对制定方法进行该劫持的时候,指定方法不会主动执行,替换为执行参数中的current方法

注意:该方法只能对指定方法进行一次劫持,若再次使用该方法劫持就会覆盖之前的劫持[可以和hookBefore,hookAfter共存,且hookBefore和hookAfter可以对同个指定方法多次劫持]

parent:
类型:object,必须,指定方法所在的对象

methodName:
类型:string,必须,指定方法的名称

current:
类型:function,必须,回调方法,该方法在指定方法被调用时执行 回调参数及返回值:

  • parent: 指定方法所在的对象,类型: object
  • method: 指定的原方法,类型: function
  • args: 原方法的参数,类型: array
  • 返回值: 规定被劫持方法的返回值,类型: *

context:
类型:object,可选,回调方法的上下文

返回值:
类型:number,劫持id(用于解除劫持)

例:

eHook.hookCurrent(Math, 'max', function (p, m, args) {
     return m.apply(Math, args) + 1;
});
console.log(Math.max(1, 8)); // 9

hookAfter(parent, methodName, after, context)

在指定方法后执行

parent:
类型:object,必须,指定方法所在的对象

methodName:
类型:string,必须,指定方法的名称

after:
类型:function,必须,回调方法,该方法在指定方法运行后执行
回调参数及返回值:

  • method: 指定的原方法,类型: function
  • args: 原方法的参数,类型: array
  • result: 原方法的返回值,类型: *
  • 返回值: 规定被劫持方法的返回值,类型: *

context:
类型:object,可选,回调方法的上下文

返回值:
类型:number,劫持id(用于解除劫持)

例:

eHook.hookAfter(Math, 'max', function (m, args, result) {
     return result + 1;
});
console.log(Math.max(1,8)); // 9

hookReplace(parent, methodName, replace, context)

劫持替换指定方法

注意:该方法会覆盖指定劫持方法在之前所进行的一切劫持,也不能重复使用,并且不和hookAfter,hookCurrent,hookBefore共存,在同时使用的情况下,优先使用hookReplace而不是其他的方法

parent:
类型:object,必须,指定方法所在的对象

methodName:
类型:string,必须,指定方法的名称

replace:
类型:function,必须,回调方法,该方法的返回值便是替换的方法
回调参数及返回值:

  • method: 指定的原方法,类型: function
  • 返回值: 规定被替换的方法内容,类型: function

context:
类型:object,可选,回调方法的上下文

返回值:
类型:number,劫持id(用于解除劫持)

例:

eHook.hookReplace(Math,'max',function (m) {
     return Math.min;
});
console.log(Math.max(1, 8)); // 1

文档持续撰写中...


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js hook框架,用于劫持方法,进行AOP切面操作 展开 收起
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Apache-2.0
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