爬虫:阿里系token-acw_sc__v2

阿里系token在请求时候回携带key为acw_sc__v2的cookie，前程无忧，36kr，雪球
acw_sc__v2 为两次请求生成，头一次接口返回一段js文件生成cookie，二次请求时候携带此cookie即可

   
以前程无忧搜索职位接口（job/search-pc）为例。点击2处，就可以进入一段js代码，就是加密cookie生成逻辑。

扣取关键代码并还原封装成 getToken函数：

String["prototype"]["hexXor"] = function(_0x4e08d8) {
                var _0x5a5d3b = '';
                for (var _0xe89588 = 0x0; _0xe89588 < this['length'] && _0xe89588 < _0x4e08d8['length']; _0xe89588 += 0x2) {
                    var _0x401af1 = parseInt(this["slice"](_0xe89588, _0xe89588 + 0x2), 0x10);
                    var _0x105f59 = parseInt(_0x4e08d8['slice'](_0xe89588, _0xe89588 + 0x2), 0x10);
                    var _0x189e2c = (_0x401af1 ^ _0x105f59)['toString'](0x10);
                    if (_0x189e2c["length"] == 0x1) {
                        _0x189e2c = '\x30' + _0x189e2c;
                    }
                    _0x5a5d3b += _0x189e2c;
                }
                return _0x5a5d3b;
            };

String['prototype']['unsbox'] = function() {
                var _0x4b082b = [0xf, 0x23, 0x1d, 0x18, 0x21, 0x10, 0x1, 0x26, 0xa, 0x9, 0x13, 0x1f, 0x28, 0x1b, 0x16, 0x17, 0x19, 0xd, 0x6, 0xb, 0x27, 0x12, 0x14, 0x8, 0xe, 0x15, 0x20, 0x1a, 0x2, 0x1e, 0x7, 0x4, 0x11, 0x5, 0x3, 0x1c, 0x22, 0x25, 0xc, 0x24];
                var _0x4da0dc = [];
                var _0x12605e = '';
                for (var _0x20a7bf = 0x0; _0x20a7bf < this['length']; _0x20a7bf++) {
                    var _0x385ee3 = this[_0x20a7bf];
                    for (var _0x217721 = 0x0; _0x217721 < _0x4b082b['length']; _0x217721++) {
                        if (_0x4b082b[_0x217721] == _0x20a7bf + 0x1) {
                            _0x4da0dc[_0x217721] = _0x385ee3;
                        }
                    }
                }
                _0x12605e = _0x4da0dc['join']('');
                return _0x12605e;
            };


let _0x5e8b26 = "3000176000856006061501533003690027800375";


function getToken(arg1) {
    var _0x23a392 = arg1['unsbox']();
    arg2 = _0x23a392['hexXor'](_0x5e8b26);
    return arg2
}