GitHub-Proxy/v_jstools
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cilame 2021-10-30 00:54:17 +08:00
parent 713fd7fefc
commit 0e56986fb5
1 changed files with 33 additions and 29 deletions
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62
tools/window_hooker.js
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@ -1,3 +1,20 @@
// 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
function fetch_hook(code){
var newn = t.ConditionalExpression(
t.BinaryExpression('===', t.ThisExpression(), t.Identifier('v_window')),
t.Identifier('v_win'),
t.ThisExpression()
)
function protect_this(path){
var node = path.node
path.replaceWith(newn)
path.stop()
}
var ast = parser.parse(code, {allowReturnOutsideFunction: true});
traverse(ast, {ThisExpression: protect_this});
var { code } = generator(ast, { jsescOption: { minimal: true, } });
return `
// 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 // 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
;(function(){ ;(function(){
var cache = {} var cache = {}
@ -14,8 +31,8 @@
}) })
} }
var filter_log = console.log var filter_log = console.log
function make_fake_window(){ !function make_fake_window(){
if (window.globalThisWindow){ return window.globalThisWindow } if (window.v_win){ return }
var _win = {} var _win = {}
function mainobj(b, r){ function mainobj(b, r){
switch(b){ switch(b){
@ -52,13 +69,9 @@
} }
var unlogs = [ var unlogs = [
'undefined', 'undefined',
'v_window',
] ]
// var unlimits = [ var localeval = eval
// 'module',
// 'define',
// 'global',
// 'process',
// ]
var win = new Proxy(_win, { var win = new Proxy(_win, {
has: function(a,b){ return true }, has: function(a,b){ return true },
set: function(a,b,c){ return filter_log('window set', b, c), window[b]=c }, set: function(a,b,c){ return filter_log('window set', b, c), window[b]=c },
@ -70,36 +83,27 @@
}, },
}) })
var interceptor = new Proxy(_win, { var interceptor = new Proxy(_win, {
has: function(a,b){ return true }, has: function(a,b){ return b in window }, // win 和 interceptor 的区别在这里
set: function(a,b,c){ return filter_log('window set', b, c), window[b]=c }, set: function(a,b,c){ return filter_log('window set', b, c), window[b]=c },
get: function(a,b){ get: function(a,b){
// 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 if (!(b in window) && typeof b != 'symbol'){ throw ReferenceError(b + ' is not defined') } // win 和 interceptor 的区别在这里
var r = mainobj(b) var r = mainobj(b)
if (!(b == Symbol.unscopables || b == Symbol.toStringTag || b == Symbol.toPrimitive || unlogs.indexOf(b) != -1)){ filter_log('window', 'get', b, r) } if (!(b == Symbol.unscopables || b == Symbol.toStringTag || b == Symbol.toPrimitive || unlogs.indexOf(b) != -1)){ filter_log('window', 'get', b, r) }
if (typeof r == 'function' && !r.prototype){ return r.bind(window) } if (typeof r == 'function' && !r.prototype){ return r.bind(window) }
return r return r
}, },
}) })
window.globalThisWindow = _win window.v_win = win
window.globalThisInterceptor = interceptor window.v_interceptor = interceptor
return Object.defineProperty(_win, 'v_run', {set:function(v){ v.call(win, interceptor) }}) window.v_window = window
} // window.v_eval = eval
return make_fake_window() }()
})() })()
// 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。 with (window.v_interceptor){
// 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。 ${code}
window.globalThisWindow.v_run = function(inter){ }
with (inter){
console.log(this == window) `
console.log(window.a)
}},1
// 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。
with (window.globalThisInterceptor){
console.log(this == window)
console.log(window.a)
} }