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@ -1,3 +1,20 @@
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// 暂时还在考虑的一种 window hook 方式。需要配合全局 ast 代码修改的方式
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function fetch_hook(code){
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var newn = t.ConditionalExpression(
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t.BinaryExpression('===', t.ThisExpression(), t.Identifier('v_window')),
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t.Identifier('v_win'),
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t.ThisExpression()
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)
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function protect_this(path){
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var node = path.node
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path.replaceWith(newn)
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path.stop()
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}
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var ast = parser.parse(code, {allowReturnOutsideFunction: true});
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traverse(ast, {ThisExpression: protect_this});
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var { code } = generator(ast, { jsescOption: { minimal: true, } });
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return `
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// 暂时还在考虑的一种 window hook 方式。需要配合全局 ast 代码修改的方式
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;(function(){
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var cache = {}
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@ -14,8 +31,8 @@
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})
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}
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var filter_log = console.log
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function make_fake_window(){
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if (window.globalThisWindow){ return window.globalThisWindow }
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!function make_fake_window(){
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if (window.v_win){ return }
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var _win = {}
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function mainobj(b, r){
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switch(b){
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@ -52,13 +69,9 @@
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}
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var unlogs = [
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'undefined',
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'v_window',
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]
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// var unlimits = [
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// 'module',
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// 'define',
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// 'global',
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// 'process',
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// ]
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var localeval = eval
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var win = new Proxy(_win, {
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has: function(a,b){ return true },
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set: function(a,b,c){ return filter_log('window set', b, c), window[b]=c },
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@ -70,36 +83,27 @@
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},
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})
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var interceptor = new Proxy(_win, {
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has: function(a,b){ return true },
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has: function(a,b){ return b in window }, // win 和 interceptor 的区别在这里
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set: function(a,b,c){ return filter_log('window set', b, c), window[b]=c },
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get: function(a,b){
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// if (!(b in window) && typeof b != 'symbol' && unlimits.indexOf(b) == -1){ throw ReferenceError(b + ' is not defined') } // win 和 interceptor 的区别在这里
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if (!(b in window) && typeof b != 'symbol'){ throw ReferenceError(b + ' is not defined') } // win 和 interceptor 的区别在这里
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var r = mainobj(b)
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if (!(b == Symbol.unscopables || b == Symbol.toStringTag || b == Symbol.toPrimitive || unlogs.indexOf(b) != -1)){ filter_log('window', 'get', b, r) }
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if (typeof r == 'function' && !r.prototype){ return r.bind(window) }
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return r
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},
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})
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window.globalThisWindow = _win
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window.globalThisInterceptor = interceptor
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return Object.defineProperty(_win, 'v_run', {set:function(v){ v.call(win, interceptor) }})
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}
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return make_fake_window()
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window.v_win = win
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window.v_interceptor = interceptor
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window.v_window = window
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// window.v_eval = eval
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}()
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})()
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// 第一种挂钩方式,能 hook 住最外层的 this ,不过有缺陷,this 也只能挂在最外一层,内层就基本挂钩不了。
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// 另外,因为代码都放在函数内部,导致函数定义只能在内部调用。跨脚本调用基本是别想了。
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window.globalThisWindow.v_run = function(inter){
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with (inter){
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console.log(this == window)
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console.log(window.a)
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}},1
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// 第二种挂钩方式,直接放弃挂钩 this 的可能,这样函数定义可以跨脚本调用,某种程度上具有鲁棒性,不过 this 这块的很难绕过。
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with (window.globalThisInterceptor){
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console.log(this == window)
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console.log(window.a)
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with (window.v_interceptor){
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${code}
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}
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`
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}
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