關於搶火車票的那些事兒（一）
又到了年底了，沒到這個時候外出工作的人兒又開始犯愁了火車票的事兒~ 票不好買，於是黃牛呀，各種搶票軟體走進了大家的事業。 搶票軟體到底是怎麼做的呢？ 正好最近工作不忙，我也比較感興趣，那就來探究一下。
據說用python 比較好，但是我沒學過python怎麼辦？
本著學習的目的我在Github上搜索12306，找了一個專案作為base code.

這個專案的程式碼總體說來還是比較規整，介紹上說是作者學習網路爬蟲的產物，我們就秉著學習的態度瞭解一下。
我的思路應該是： 登陸12306 查詢餘票 如果沒有我想要的車次就繼續查詢 有我想要的車次，就買買買啊
嗯，思路是這樣， 那還需要什麼工具呢？ 瀏覽器總要有一個吧、 同時推薦抓包工具Fiddler~
先看了一眼程式碼裡面登陸12306的login程式碼 看到了一個讓人懵逼的URL，好長好長。。

url = 'https://kyfw.12306.cn/otn/HttpZF/logdevice?algID=QRqR6wPyKZ&hashCode=lkUTDoJPpSm3zCb7GSoeajQQHkpHcXusReeMHhKXtMk&FMQw=0&q4f3=en-US&VySQ=FGH9RLTQe0Il8zvsUhAS0D1MpIRW0RrY&VPIf=1&custID=133&VEek=unknown&dzuS=0&yD16=1&EOQP=a6588b471456c0b2345c44dc367af87d&jp76=223017b546a29cfe7aa7f1efcefc0b88&hAqN=Win32&platform=WEB&ks0Q=ebda3f4fca91cb13d8a03858320fadbb&TeRS=777x1449&tOHY=24xx815x1449&Fvje=i1l1s1&q5aJ=-8&wNLf=99115dfb07133750ba677d055874de87&0aew={}&E3gR=009220e11f272d503c007d3cdb571082×tamp={}'.format(
                   self.session.headers['User-Agent'], str(round(time.time() * 1000)))
 

還是自己動手看看這是什麼鬼吧~ 開Fiddler，開啟瀏覽器訪問12306購票的登陸頁，如果不是第一次訪問，請記得先清理Cookie

看下Fiddler的結果，看到了登陸頁的url
以及。。。 這個URL 並不是我們輸入的，但是事實上瀏覽器同時Get了這個url的頁面，並且返回了一個json資料包。 一般這種情況是瀏覽器執行了網站提供的JS。
返回的資料：
callbackFunction('{"exp":"1516684953759","dfp":"Obx0B8YpTc4w_TvvjFdnemQfr8qDcnOBWe-icB28BDZzz0tUvoetQnMerrd1wFpDX0fc_ctRLiFhogrQyrqa0crPAgKGxrpoFn_IFUaSOcgm-Ik9Fb7a46VnA2FEAuS79h0l0HhmyHhixL5oSWDfe4RleORr_5dT"}')
這個是幹什麼用的呢？
我們在網頁上登陸一下在抓包就會發現
對比上圖，我們會發現Cookie多了兩項，而且值就是那個URL返回的資料。
這下我們可以猜測： 訪問登入頁的時候，網站提供了JS給瀏覽器執行，執行的結果是動態取了兩個Value放進了Cookie裡面。。這樣瀏覽器可以正常訪問，一些簡單模擬https登陸的小軟體Cookie沒有這兩個值，可以不給登陸。。 66666
等等，我們跟程式碼裡面確認一下我們的猜測

response = self.session.get(requests.utils.requote_uri(url))
                pattern = re.compile('\(\'(.*?)\'\)')
                userVerify3 = eval(pattern.findall(response.text)[0])
                 print('設定cookie')
                 print(userVerify3)
                railExpiration = userVerify3['exp']
                railDeviceId = userVerify3['dfp']
                self.session.cookies['RAIL_EXPIRATION'] = railExpiration
                self.session.cookies['RAIL_DEVICEID'] = railDeviceId
 

果然是這樣，哈哈哈哈 but...問題來了，程式碼裡面寫死這個url，感覺非常不可取，我們可以發現瀏覽器執行JS的結果每次url都是不同的，這樣寫個死的，而且後面還帶個時間戳，如果網站有過期判定，那不是不能夠用了麼。。

url = 'https://kyfw.12306.cn/otn/HttpZF/logdevice?algID=QRqR6wPyKZ&hashCode=lkUTDoJPpSm3zCb7GSoeajQQHkpHcXusReeMHhKXtMk&FMQw=0&q4f3=en-US&VySQ=FGH9RLTQe0Il8zvsUhAS0D1MpIRW0RrY&VPIf=1&custID=133&VEek=unknown&dzuS=0&yD16=1&EOQP=a6588b471456c0b2345c44dc367af87d&jp76=223017b546a29cfe7aa7f1efcefc0b88&hAqN=Win32&platform=WEB&ks0Q=ebda3f4fca91cb13d8a03858320fadbb&TeRS=777x1449&tOHY=24xx815x1449&Fvje=i1l1s1&q5aJ=-8&wNLf=99115dfb07133750ba677d055874de87&0aew={}&E3gR=009220e11f272d503c007d3cdb571082×tamp={}'.format(
                   self.session.headers['User-Agent'], str(round(time.time() * 1000)))

忽然理解了為什麼搶票軟體更新那麼頻繁。。。。。。。
但是我們怎麼獲取這個動態的URL呢？
我們先看看能不能看懂JS程式碼怎麼生成的吧
開啟瀏覽器除錯模式（F12）

壓縮過的。。太亂了，複製出來格式化一下吧。 2K多行的JS。。感興趣的可以看一下文末那些JS程式碼。
我反正是放棄讀懂它了。。
那還有沒有其他的路獲取這個Cookie資料呢？ 可以執行JS呀，可以給python 掛個JS引擎。。雖然笨重。 但是我沒有這樣做，我是用C# Webbrowser 寫個個exe，exe的作用就是訪問登入頁，獲取Cookie並且寫入文字 然後Python再去讀文字獲取Cookie就好了。。

            try:
                #Run C#程式獲取完成Cookie
                os.system('Wpf12306.exe')
                #win32api.ShellExecute(0, 'open', 'Wpf12306.exe', '', '', 0)
                f = open("Cookie.txt", "r")
                lines = f.readline()
                f.close()
                tuCookies = tuple(lines.split(";"))
                for i in tuCookies:
                    tut = i.split("=")
                    self.session.cookies[tut[0]] = tut[1]

Cookie.txt的內容
JSESSIONID=69A073C9272D98E95296EC126BCEFD27; RAIL_DEVICEID=ji3AS1K5ZPE6dsmsd4GMrolxXkX9xPX1cXV0VXF4-3tuAc7MrLWQDmGtRB7GMGHs-LPdcQ8aEkynSmgTLUyQClBZedTxYLLTPyR40nDE8SBQhp2ZUT1D8nxubdw3sKq29dfSClTH_JRlxQvkKRqIbmEeDC_gwRnC; RAIL_EXPIRATION=1516506547281; route=495c805987d0f5c8c84b14f60212447d; BIGipServerotn=1708720394.64545.0000; BIGipServerpassport=786956554.50215.0000

誒，12306的機制果然不一般吶，這僅僅是登陸之前要準備的工作之一。。。
第一篇先寫到這裡吧~


參考JS

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                    a();
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            var e = !1;
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            d.onaddstream = function(a) {
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                function() {})
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            var b = q.createElement("div");
            a.parentNode.insertBefore(b, a);
            b.parentNode.replaceChild(Ca(a), b);
            a.style.display = "none"; (function d() {
                4 == a.readyState ? a.parentNode.removeChild(a) : G(d, 10)
            })()
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    }
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        Ea = d || null;
        Va = {
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            "OBJECT" == e.nodeName ? (Z = Ca(e), oa = null) : (Z = e, oa = c);
            a.id = "SWFObjectExprInst";
            if ("undefined" == typeof a.width || !/%$/.test(a.width) && 310 > parseInt(a.width, 10)) a.width = "310";
            if ("undefined" == typeof a.height || !/%$/.test(a.height) && 137 > parseInt(a.height, 10)) a.height = "137";
            q.title = q.title.slice(0, 47) + " - Flash Player Installation";
            d = m.ie && m.win ? "ActiveX": "PlugIn";
            d = "MMredirectURL\x3d" + I.location.toString().replace(/&/g, "%26") + "\x26MMplayerType\x3d" + d + "\x26MMdoctitle\x3d" + q.title;
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            } ());
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                    e.width = f.getAttribute("width") || "0";
                    e.height = f.getAttribute("height") || "0";
                    f.getAttribute("class") && (e.styleclass = f.getAttribute("class"));
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                    f = f.getElementsByTagName("param"), p = f.length, g = 0; g < p; g++)"movie" != f[g].getAttribute("name").toLowerCase() && (h[f[g].getAttribute("name")] = f[g].getAttribute("value"));
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            b.attachEvent("onload", a);
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    }
    function U() {
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            try {
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                a.parentNode.removeChild(a)
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            b = 0; b < a; b++) pa[b]()
        }
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    function Ya(a) {
        return 4294967296 * (a - (a | 0)) | 0
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        this.options = this.extend(a, {
            sortPluginsFor: [/palemoon/i],
            detectScreenOrientation: !0,
            swfPath: "flash/compiled/FontList.swf",
            swfContainerId: "fingerprintjs2",
            userDefinedFonts: []
        });
        this.nativeForEach = Array.prototype.forEach;
        this.nativeMap = Array.prototype.map
    }
    function C(a, b, c, d, e, f, h) {
        return A(b & d | c & ~d, a, b, e, f, h)
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    function ba(a) {
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        a = a.length * ca;
        b[a >> 5] |= 128 << a % 32;
        b[(a + 64 >>> 9 << 4) + 14] = a;
        a = 1732584193;
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        d = -1732584194,
        e = 271733878,
        f = 0; f < b.length; f += 16) {
            var h = a,
            p = c,
            g = d,
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            e = D(e, a, c, d, b[f + 5], 12, 1200080426);
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            c = D(c, d, e, a, b[f + 15], 22, 1236535329);
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            e = C(e, a, c, d, b[f + 6], 9, -1069501632);
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            e = C(e, a, c, d, b[f + 10], 9, 38016083);
            d = C(d, e, a, c, b[f + 15], 14, -660478335);
            c = C(c, d, e, a, b[f + 4], 20, -405537848);
            a = C(a, c, d, e, b[f + 9], 5, 568446438);
            e = C(e, a, c, d, b[f + 14], 9, -1019803690);
            d = C(d, e, a, c, b[f + 3], 14, -187363961);
            c = C(c, d, e, a, b[f + 8], 20, 1163531501);
            a = C(a, c, d, e, b[f + 13], 5, -1444681467);
            e = C(e, a, c, d, b[f + 2], 9, -51403784);
            d = C(d, e, a, c, b[f + 7], 14, 1735328473);
            c = C(c, d, e, a, b[f + 12], 20, -1926607734);
            a = A(c ^ d ^ e, a, c, b[f + 5], 4, -378558);
            e = A(a ^ c ^ d, e, a, b[f + 8], 11, -2022574463);
            d = A(e ^ a ^ c, d, e, b[f + 11], 16, 1839030562);
            c = A(d ^ e ^ a, c, d, b[f + 14], 23, -35309556);
            a = A(c ^ d ^ e, a, c, b[f + 1], 4, -1530992060);
            e = A(a ^ c ^ d, e, a, b[f + 4], 11, 1272893353);
            d = A(e ^ a ^ c, d, e, b[f + 7], 16, -155497632);
            c = A(d ^ e ^ a, c, d, b[f + 10], 23, -1094730640);
            a = A(c ^ d ^ e, a, c, b[f + 13], 4, 681279174);
            e = A(a ^ c ^ d, e, a, b[f + 0], 11, -358537222);
            d = A(e ^ a ^ c, d, e, b[f + 3], 16, -722521979);
            c = A(d ^ e ^ a, c, d, b[f + 6], 23, 76029189);
            a = A(c ^ d ^ e, a, c, b[f + 9], 4, -640364487);
            e = A(a ^ c ^ d, e, a, b[f + 12], 11, -421815835);
            d = A(e ^ a ^ c, d, e, b[f + 15], 16, 530742520);
            c = A(d ^ e ^ a, c, d, b[f + 2], 23, -995338651);
            a = E(a, c, d, e, b[f + 0], 6, -198630844);
            e = E(e, a, c, d, b[f + 7], 10, 1126891415);
            d = E(d, e, a, c, b[f + 14], 15, -1416354905);
            c = E(c, d, e, a, b[f + 5], 21, -57434055);
            a = E(a, c, d, e, b[f + 12], 6, 1700485571);
            e = E(e, a, c, d, b[f + 3], 10, -1894986606);
            d = E(d, e, a, c, b[f + 10], 15, -1051523);
            c = E(c, d, e, a, b[f + 1], 21, -2054922799);
            a = E(a, c, d, e, b[f + 8], 6, 1873313359);
            e = E(e, a, c, d, b[f + 15], 10, -30611744);
            d = E(d, e, a, c, b[f + 6], 15, -1560198380);
            c = E(c, d, e, a, b[f + 13], 21, 1309151649);
            a = E(a, c, d, e, b[f + 4], 6, -145523070);
            e = E(e, a, c, d, b[f + 11], 10, -1120210379);
            d = E(d, e, a, c, b[f + 2], 15, 718787259);
            c = E(c, d, e, a, b[f + 9], 21, -343485551);
            a = N(a, h);
            c = N(c, p);
            d = N(d, g);
            e = N(e, m)
        }
        b = [a, c, d, e];
        a = "";
        for (c = 0; c < 4 * b.length; c++) a += "0123456789abcdef".charAt(b[c >> 2] >> c % 4 * 8 + 4 & 15) + "0123456789abcdef".charAt(b[c >> 2] >> c % 4 * 8 & 15);
        return a
    }
    function D(a, b, c, d, e, f, h) {
        return A(b & c | ~b & d, a, b, e, f, h)
    }
    function N(a, b) {
        var c = (a & 65535) + (b & 65535);
        return (a >> 16) + (b >> 16) + (c >> 16) << 16 | c & 65535
    }
    function E(a, b, c, d, e, f, h) {
        return A(c ^ (b | ~d), a, b, e, f, h)
    }
    function A(a, b, c, d, e, f) {
        a = N(N(b, a), N(d, f));
        return N(a << e | a >>> 32 - e, c)
    }
    function F(a) {
        var b, c, d, e = u.cookie.split(";");
        for (b = 0; b < e.length; b++) if (c = e[b].substr(0, e[b].indexOf("\x3d")), d = e[b].substr(e[b].indexOf("\x3d") + 1), c = c.replace(/^\s+|\s+$/g, ""), a = a.replace(/^\s+|\s+$/g, ""), c == a) return unescape(d)
    }
    function V(a, b, c, d, e, f) {
        var h = new Date;
        h.setTime(h.getTime()); - 1 != c ? (c *= 864E5, h = new Date(h.getTime() + c), cookieString = a + "\x3d" + escape(b) + (c ? ";expires\x3d" + h.toGMTString() : "") + (d ? ";path\x3d" + d: "") + (e ? ";domain\x3d" + e: "") + (f ? ";secure": "")) : (h = -1, cookieString = a + "\x3d" + escape(b) + (c ? ";expires\x3d" + h: "") + (d ? ";path\x3d" + d: "") + (e ? ";domain\x3d" + e: "") + (f ? ";secure": ""));
        u.cookie = cookieString
    }
    function pb(a) {
        a = a.replace(/\s/g, "");
        if (/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/.test(a)) {
            a = a.split(".");
            if (0 == parseInt(parseFloat(a[0])) || 0 == parseInt(parseFloat(a[3]))) return ! 1;
            for (var b = 0; b < a.length; b++) if (255 < parseInt(parseFloat(a[b]))) return ! 1;
            return ! 0
        }
        return ! 1
    }
    function l(a, b) {
        this.key = a;
        this.value = b
    }
    function V(a, b, c) {
        var d = new Date;
        d.setTime(d.getTime() + 864E5 * Number(c));
        u.cookie = a + "\x3d" + b + "; path\x3d/;expires \x3d " + d.toGMTString() + ";domain\x3d" + za(r.location.host.split(":")[0])
    }
    function Ia() {
        var a = g.userAgent.toLowerCase();
        return 0 <= a.indexOf("windows phone") ? "WindowsPhone": 0 <= a.indexOf("win") ? "Windows": 0 <= a.indexOf("android") ? "Android": 0 <= a.indexOf("linux") ? "Linux": 0 <= a.indexOf("iphone") || 0 <= a.indexOf("ipad") ? "iOS": 0 <= a.indexOf("mac") ? "Mac": "Other"
    }
    function ja() {
        this.ec = new evercookie;
        this.deviceEc = new evercookie;
        this.cfp = new aa;
        this.packageString = "";
        this.moreInfoArray = []
    }
    var u = document,
    r = window,
    g = navigator,
    y = screen,
    G = setTimeout,
    rb = top,
    sb = location,
    tb = parent;
    Array.prototype.indexOf || (Array.prototype.indexOf = function(a, b) {
        var c;
        if (null == this) throw new TypeError("'this' is null or undefined");
        var d = Object(this),
        e = d.length >>> 0;
        if (0 === e) return - 1;
        c = +b || 0;
        Infinity === Math.abs(c) && (c = 0);
        if (c >= e) return - 1;
        for (c = Math.max(0 <= c ? c: e - Math.abs(c), 0); c < e;) {
            if (c in d && d[c] === a) return c;
            c++
        }
        return - 1
    });
    var Za = {
        removeElem: function(a) {
            var b = a.parentNode;
            if (b) try {
                b.removeChild(a)
            } catch(c) {}
        },
        getJSON: function(a, b, c) {
            b = u.createElement("script");
            b.type = "text/javascript";
            b.src = a;
            b.id = "id_callbackFunction";
            r.callbackFunction = function(a) {
                r.callbackFunction = void 0;
                var b = u.getElementById("id_callbackFunction");
                b && Za.removeElem(b);
                c(a)
            }; (a = u.getElementsByTagName("head")) && a[0] && a[0].appendChild(b)
        },
        rand: function() {
            return Math.random().toString().substr(2)
        },
        parseData: function(a) {
            var b = "";
            if ("string" === typeof a) b = a;
            else if ("object" === typeof a) for (var c in a) b += "\x26" + c + "\x3d" + encodeURIComponent(a[c]);
            b += "\x26_time\x3d" + this.now();
            return b = b.substr(1)
        },
        now: function() {
            return (new Date).getTime()
        }
    },
    $a = ["WEB", "WAP"];
    "object" != typeof JSON && (JSON = {}); (function() {
        function a(a) {
            return 10 > a ? "0" + a: a
        }
        function b() {
            return this.valueOf()
        }
        function c(a) {
            return n.lastIndex = 0,
            n.test(a) ? '"' + a.replace(n,
            function(a) {
                var b = h[a];
                return "string" == typeof b ? b: "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice( - 4)
            }) + '"': '"' + a + '"'
        }
        function d(a, b) {
            var v, h, z, B, k, g = e,
            n = b[a];
            switch (n && "object" == typeof n && "function" == typeof n.toJSON && (n = n.toJSON(a)), "function" == typeof p && (n = p.call(b, a, n)), typeof n) {
            case "string":
                return c(n);
            case "number":
                return isFinite(n) ? String(n) : "null";
            case "boolean":
            case "null":
                return String(n);
            case "object":
                if (!n) return "null";
                if (e += f, k = [], "[object Array]" === Object.prototype.toString.apply(n)) {
                    B = n.length;
                    for (v = 0; B > v; v += 1) k[v] = d(v, n) || "null";
                    return z = 0 === k.length ? "[]": e ? "[\n" + e + k.join(",\n" + e) + "\n" + g + "]": "[" + k.join(",") + "]",
                    e = g,
                    z
                }
                if (p && "object" == typeof p) for (B = p.length, v = 0; B > v; v += 1)"string" == typeof p[v] && (h = p[v], z = d(h, n), z && k.push(c(h) + (e ? ": ": ":") + z));
                else for (h in n) Object.prototype.hasOwnProperty.call(n, h) && (z = d(h, n), z && k.push(c(h) + (e ? ": ": ":") + z));
                return z = 0 === k.length ? "{}": e ? "{\n" + e + k.join(",\n" + e) + "\n" + g + "}": "{" + k.join(",") + "}",
                e = g,
                z
            }
        }
        var e, f, h, p, g = /^[\],:{}\s]*$/,
        m = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
        K = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
        k = /(?:^|:|,)(?:\s*\[)+/g,
        n = /[\\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        l = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
        "function" != typeof Date.prototype.toJSON && (Date.prototype.toJSON = function() {
            return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + a(this.getUTCMonth() + 1) + "-" + a(this.getUTCDate()) + "T" + a(this.getUTCHours()) + ":" + a(this.getUTCMinutes()) + ":" + a(this.getUTCSeconds()) + "Z": null
        },
        Boolean.prototype.toJSON = b, Number.prototype.toJSON = b, String.prototype.toJSON = b);
        "function" != typeof JSON.stringify && (h = {
            "\r": "\\r",
            "\b": "\\b",
            '"': '\\"',
            "\n": "\\n",
            "   ": "\\t",
            "\f": "\\f",
            "\\": "\\\\"
        },
        JSON.stringify = function(a, b, c) {
            var v;
            if (e = "", f = "", "number" == typeof c) for (v = 0; c > v; v += 1) f += " ";
            else "string" == typeof c && (f = c);
            if (p = b, b && "function" != typeof b && ("object" != typeof b || "number" != typeof b.length)) throw Error("JSON.stringify");
            return d("", {
                "": a
            })
        });
        "function" != typeof JSON.parse && (JSON.parse = function(a, b) {
            function c(a, d) {
                var e, f, v = a[d];
                if (v && "object" == typeof v) for (e in v) Object.prototype.hasOwnProperty.call(v, e) && (f = c(v, e), void 0 !== f ? v[e] = f: delete v[e]);
                return b.call(a, d, v)
            }
            var d;
            if (a = String(a), l.lastIndex = 0, l.test(a) && (a = a.replace(l,
            function(a) {
                return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice( - 4)
            })), g.test(a.replace(m, "@").replace(K, "]").replace(k, ""))) return d = eval("(" + a + ")"),
            "function" == typeof b ? c({
                "": d
            },
            "") : d;
            throw new SyntaxError("JSON.parse");
        })
    })();
    debug = !1;
    var Ja;
    if (! (Ja = Y)) {
        var da = Math,
        qa = {},
        ra = qa.lib = {},
        ab = function() {},
        ea = ra.Base = {
            clone: function() {
                return this.init.prototype.extend(this)
            },
            init: function() {},
            extend: function(a) {
                ab.prototype = this;
                var b = new ab;
                a && b.mixIn(a);
                b.hasOwnProperty("init") || (b.init = function() {
                    b.$super.init.apply(this, arguments)
                });
                b.init.prototype = b;
                b.$super = this;
                return b
            },
            create: function() {
                var a = this.extend();
                a.init.apply(a, arguments);
                return a
            },
            mixIn: function(a) {
                for (var b in a) a.hasOwnProperty(b) && (this[b] = a[b]);
                a.hasOwnProperty("toString") && (this.toString = a.toString)
            }
        },
        fa = ra.WordArray = ea.extend({
            clamp: function() {
                var a = this.words,
                b = this.sigBytes;
                a[b >>> 2] &= 4294967295 << 32 - b % 4 * 8;
                a.length = da.ceil(b / 4)
            },
            init: function(a, b) {
                a = this.words = a || [];
                this.sigBytes = void 0 != b ? b: 4 * a.length
            },
            random: function(a) {
                for (var b = [], c = 0; c < a; c += 4) b.push(4294967296 * da.random() | 0);
                return new fa.init(b, a)
            },
            concat: function(a) {
                var b = this.words,
                c = a.words,
                d = this.sigBytes;
                a = a.sigBytes;
                this.clamp();
                if (d % 4) for (var e = 0; e < a; e++) b[d + e >>> 2] |= (c[e >>> 2] >>> 24 - e % 4 * 8 & 255) << 24 - (d + e) % 4 * 8;
                else if (65535 < c.length) for (e = 0; e < a; e += 4) b[d + e >>> 2] = c[e >>> 2];
                else b.push.apply(b, c);
                this.sigBytes += a;
                return this
            },
            toString: function(a) {
                return (a || ub).stringify(this)
            },
            clone: function() {
                var a = ea.clone.call(this);
                a.words = this.words.slice(0);
                return a
            }
        }),
        Ka = qa.enc = {},
        ub = Ka.Hex = {
            parse: function(a) {
                for (var b = a.length,
                c = [], d = 0; d < b; d += 2) c[d >>> 3] |= parseInt(a.substr(d, 2), 16) << 24 - d % 8 * 4;
                return new fa.init(c, b / 2)
            },
            stringify: function(a) {
                var b = a.words;
                a = a.sigBytes;
                for (var c = [], d = 0; d < a; d++) {
                    var e = b[d >>> 2] >>> 24 - d % 4 * 8 & 255;
                    c.push((e >>> 4).toString(16));
                    c.push((e & 15).toString(16))
                }
                return c.join("")
            }
        },
        bb = Ka.Latin1 = {
            parse: function(a) {
                for (var b = a.length,
                c = [], d = 0; d < b; d++) c[d >>> 2] |= (a.charCodeAt(d) & 255) << 24 - d % 4 * 8;
                return new fa.init(c, b)
            },
            stringify: function(a) {
                var b = a.words;
                a = a.sigBytes;
                for (var c = [], d = 0; d < a; d++) c.push(String.fromCharCode(b[d >>> 2] >>> 24 - d % 4 * 8 & 255));
                return c.join("")
            }
        },
        vb = Ka.Utf8 = {
            stringify: function(a) {
                try {
                    return decodeURIComponent(escape(bb.stringify(a)))
                } catch(b) {
                    throw Error("Malformed UTF-8 data");
                }
            },
            parse: function(a) {
                return bb.parse(unescape(encodeURIComponent(a)))
            }
        },
        cb = ra.BufferedBlockAlgorithm = ea.extend({
            _minBufferSize: 0,
            clone: function() {
                var a = ea.clone.call(this);
                a._data = this._data.clone();
                return a
            },
            reset: function() {
                this._data = new fa.init;
                this._nDataBytes = 0
            },
            _append: function(a) {
                "string" == typeof a && (a = vb.parse(a));
                this._data.concat(a);
                this._nDataBytes += a.sigBytes
            },
            _process: function(a) {
                var b = this._data,
                c = b.words,
                d = b.sigBytes,
                e = this.blockSize,
                f = d / (4 * e),
                f = a ? da.ceil(f) : da.max((f | 0) - this._minBufferSize, 0);
                a = f * e;
                d = da.min(4 * a, d);
                if (a) {
                    for (var h = 0; h < a; h += e) this._doProcessBlock(c, h);
                    h = c.splice(0, a);
                    b.sigBytes -= d
                }
                return new fa.init(h, d)
            }
        });
        ra.Hasher = cb.extend({
            blockSize: 16,
            _createHmacHelper: function(a) {
                return function(b, c) {
                    return (new wb.HMAC.init(a, c)).finalize(b)
                }
            },
            reset: function() {
                cb.reset.call(this);
                this._doReset()
            },
            finalize: function(a) {
                a && this._append(a);
                return this._doFinalize()
            },
            update: function(a) {
                this._append(a);
                this._process();
                return this
            },
            cfg: ea.extend(),
            _createHelper: function(a) {
                return function(b, c) {
                    return (new a.init(c)).finalize(b)
                }
            },
            init: function(a) {
                this.cfg = this.cfg.extend(a);
                this.reset()
            }
        });
        var wb = qa.algo = {};
        Ja = qa
    }
    for (var Y = Ja,
    sa = Math,
    ta = Y,
    R = ta.lib,
    xb = R.WordArray,
    ua = R.Hasher,
    R = ta.algo,
    db = [], eb = [], va = 2, ga = 0; 64 > ga;) {
        var W;
        a: {
            W = va;
            for (var yb = sa.sqrt(W), La = 2; La <= yb; La++) if (! (W % La)) {
                W = !1;
                break a
            }
            W = !0
        }
        W && (8 > ga && (db[ga] = Ya(sa.pow(va, .5))), eb[ga] = Ya(sa.pow(va, 1 / 3)), ga++);
        va++
    }
    var S = [],
    R = R.SHA256 = ua.extend({
        _doProcessBlock: function(a, b) {
            for (var c = this._hash.words,
            d = c[0], e = c[1], f = c[2], h = c[3], p = c[4], g = c[5], m = c[6], K = c[7], k = 0; 64 > k; k++) {
                if (16 > k) S[k] = a[b + k] | 0;
                else {
                    var n = S[k - 15],
                    l = S[k - 2];
                    S[k] = ((n << 25 | n >>> 7) ^ (n << 14 | n >>> 18) ^ n >>> 3) + S[k - 7] + ((l << 15 | l >>> 17) ^ (l << 13 | l >>> 19) ^ l >>> 10) + S[k - 16]
                }
                n = K + ((p << 26 | p >>> 6) ^ (p << 21 | p >>> 11) ^ (p << 7 | p >>> 25)) + (p & g ^ ~p & m) + eb[k] + S[k];
                l = ((d << 30 | d >>> 2) ^ (d << 19 | d >>> 13) ^ (d << 10 | d >>> 22)) + (d & e ^ d & f ^ e & f);
                K = m;
                m = g;
                g = p;
                p = h + n | 0;
                h = f;
                f = e;
                e = d;
                d = n + l | 0
            }
            c[0] = c[0] + d | 0;
            c[1] = c[1] + e | 0;
            c[2] = c[2] + f | 0;
            c[3] = c[3] + h | 0;
            c[4] = c[4] + p | 0;
            c[5] = c[5] + g | 0;
            c[6] = c[6] + m | 0;
            c[7] = c[7] + K | 0
        },
        _doFinalize: function() {
            var a = this._data,
            b = a.words,
            c = 8 * this._nDataBytes,
            d = 8 * a.sigBytes;
            b[d >>> 5] |= 128 << 24 - d % 32;
            b[(d + 64 >>> 9 << 4) + 14] = sa.floor(c / 4294967296);
            b[(d + 64 >>> 9 << 4) + 15] = c;
            a.sigBytes = 4 * b.length;
            this._process();
            return this._hash
        },
        _doReset: function() {
            this._hash = new xb.init(db.slice(0))
        },
        clone: function() {
            var a = ua.clone.call(this);
            a._hash = this._hash.clone();
            return a
        }
    });
    ta.SHA256 = ua._createHelper(R);
    ta.HmacSHA256 = ua._createHmacHelper(R);
    var fb = Y,
    zb = fb.lib.WordArray;
    fb.enc.Base64 = {
        parse: function(a) {
            var b = a.length,
            c = this._map,
            d = c.charAt(64);
            d && (d = a.indexOf(d), -1 != d && (b = d));
            for (var d = [], e = 0, f = 0; f < b; f++) if (f % 4) {
                var h = c.indexOf(a.charAt(f - 1)) << f % 4 * 2,
                p = c.indexOf(a.charAt(f)) >>> 6 - f % 4 * 2;
                d[e >>> 2] |= (h | p) << 24 - e % 4 * 8;
                e++
            }
            return zb.create(d, e)
        },
        stringify: function(a) {
            var b = a.words,
            c = a.sigBytes,
            d = this._map;
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            a = [];
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