爬虫：Sentry-Span参数逆向

在抓某眼查数据太过频繁时会出现极验的验证码。极验的教程有很多，主要是发现在这里获取验证码的时候需要携带参数Sentry-Span。在这里记录一下逆向的主要过程，直接上补环境的代码。

window = global;
location = {
   
   };
my_log = console.log;

(function () {
   
   
    let constructorCache = Function.prototype.constructor;
    Function.prototype.constructor = function (string) {
   
   
        if (string === "debugger") {
   
   
            // console.log("Hook constructor debugger!");
            return function () {
   
   };
        }
        return constructorCache(string);
    };
})();

Function.constructor.prototype.bind = function(res){
   
   return res}

setInterval = function(){
   
   }

// arg
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   return _0x2c77(_0x16b5d7-0x19a,_0x58f501)};while(!![]){
   
   try{
   
   var _0x514296=-parseInt(_0x19ce24(0x2a7,0x269,0x284,0x283))+ -parseInt(_0x3e023c(0x27a,0x2e3,0x25f,0x287))*-parseInt(_0x19ce24(0x2fd,0x264,0x261,0x2b9))+parseInt(_0x19ce24(0x2e1,0x2e2,0x33d,0x2ff))+ -parseInt(_0x3e023c(0x2c2,0x22d,0x2bb,0x269))+ -parseInt(_0x19ce24(0x2a3,0x274,0x2f7,0x295))*-parseInt(_0x19ce24(0x1fd,0x260,0x20d,0x25e))+ -parseInt(_0x3e023c(0x31f,0x2ea,0x2e6,0x2d6))*parseInt(_0x19ce24(0x299,0x27c,0x28d,0x23b))+ -parseInt(_0x19ce24(0x20f,0x292,0x297,0x24e))*parseInt(_0x19ce24(0x2d6,0x2a0,0x2ce,0x2a3));if(_0x514296===_0x1e20c9)break;else _0x478bbd['push'](_0x478bbd['shift']())}catch(_0x36fd3f){
   
   _0x478bbd['push'](_0x478bbd['shift']())}}}(_0x2927,0x6ef93*-0x1+ -0x6b04e+0x185b7*0xd));var _0x13c81d=function(){
   
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   return _0x36b206(_0x208969-0xc1,_0x297180-0x176,_0x297180,_0x16d513-0x39)};_0xbf326f[_0x34b816(0x434,0x406,0x487,0x45e)](_0x1e05cb)}}else{
   
   var _0x5f517b=_0x3fcc38[_0x36b206(0x37d,0x39d,0x321,0x37a)+_0x36b206(0x333,0x321,0x323,0x348)+'\x72'](_0xbf326f[_0x36b206(0x3a3,0x3e7,0x397,0x3f7)])()['\x63\x6f\x6e\x73\x74'+_0x531d36(0x333,0x2e7,0x38e,0x367)+'\x72'](_0xbf326f['\x69\x4a\x50\x55\x73']);return!_0x5f517b[_0x36b206(0x3b4,0x365,0x3fc,0x353)](_0x4ab568)}};return _0xbf326f['\x6b\x48\x65\x51\x6d'](_0x3fcc38)});_0x4ab568();function _0x2c77(_0x12d409,_0x2c40e0){
   
   _0x12d409=_0x12d409-(0x2*-0x36d+ -0x1696+0x1e0e);var _0x2b2fc2=_0x2927[_0x12d409];if(_0x2c77['\x69\x4f\x73\x48\x66\x6b']===undefined){
   
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   var _0x46ffd3='\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f\x70\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x2b\x2f\x3d';var _0x1ae60d='';for(var _0x2d4980=0xbd8*0x2+ -0x247e+ -0x95*-0x16,_0x2577dd,_0x18a1d4,_0x5469fe=-0x22b1+ -0x55a+0x280b;_0x18a1d4=_0xa538bc['\x63\x68\x61\x72\x41\x74'](_0x5469fe++);~_0x18a1d4&&(_0x2577dd=_0x2d4980%(0xa35+0x2242+ -0xed1*0x3)?_0x2577dd*(0xab*-0xf+0x175c+ -0xd17)+_0x18a1d4:_0x18a1d4,_0x2d4980++%(0x1312+0x2334*0x1+ -0x3642))?_0x1ae60d+=String['\x66\x72\x6f\x6d\x43\x68\x61\x72\x43\x6f\x64\x65'](-0x2*0x52f+ -0x1*0x3a9+0xf06&_0x2577dd>>(-(-0x607+0x6*0x1d5+ -0x9*0x8d)*_0x2d4980&-0x1*-0x697+0x29*0xa7+ -0x1*0x2150)):-0x3*0x32b+ -0x2*0xa5a+0x1e35){
   
   _0x18a1d4=_0x46ffd3['\x69\x6e\x64\x65\x78\x4f\x66'](_0x18a1d4)}return _0x1ae60d};_0x2c77[<