a script for check product history price, using PyV8.

manmanbuy.py

#coding: utf-8

import sys
if sys.getdefaultencoding() != 'utf-8':
    reload(sys)
    sys.setdefaultencoding('utf-8')
import json
import re
from urllib import quote
from datetime import datetime
from dateutil.relativedelta import relativedelta

import requests
from pyv8 import PyV8

header = {
    'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36',
    'referer': 'http://tool.manmanbuy.com/historyLowest.aspx'
}

f1 = '''
var hexcase = 0;
var b64pad = "";
var chrsz = 8;

function hex_md5(s) {
    return binl2hex(core_md5(str2binl(s), s.length * chrsz))
}
function b64_md5(s) {
    return binl2b64(core_md5(str2binl(s), s.length * chrsz))
}
function str_md5(s) {
    return binl2str(core_md5(str2binl(s), s.length * chrsz))
}
function hex_hmac_md5(key, data) {
    return binl2hex(core_hmac_md5(key, data))
}
function b64_hmac_md5(key, data) {
    return binl2b64(core_hmac_md5(key, data))
}
function str_hmac_md5(key, data) {
    return binl2str(core_hmac_md5(key, data))
}
function core_md5(x, len) {
    x[len >> 5] |= 0x80 << ((len) % 32);
    x[(((len + 64) >>> 9) << 4) + 14] = len;
    var a = 1732584193;
    var b = -271733879;
    var c = -1732584194;
    var d = 271733878;
    for (var i = 0; i < x.length; i += 16) {
        var olda = a;
        var oldb = b;
        var oldc = c;
        var oldd = d;
        a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
        d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
        c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
        b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
        a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
        d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
        c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
        b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
        a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
        d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
        c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
        b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
        a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
        d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
        c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
        b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
        a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
        d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
        c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
        b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
        a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
        d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
        c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
        b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
        a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
        d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
        c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
        b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
        a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
        d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
        c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
        b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
        a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
        d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
        c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
        b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
        a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
        d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
        c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
        b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
        a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
        d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
        c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
        b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
        a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
        d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
        c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
        b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
        a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
        d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
        c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
        b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
        a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
        d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
        c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
        b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
        a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
        d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
        c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
        b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
        a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
        d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
        c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
        b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
        a = safe_add(a, olda);
        b = safe_add(b, oldb);
        c = safe_add(c, oldc);
        d = safe_add(d, oldd)
    }
    return Array(a, b, c, d)
}
function md5_cmn(q, a, b, x, s, t) {
    return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)
}
function md5_ff(a, b, c, d, x, s, t) {
    return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t)
}
function md5_gg(a, b, c, d, x, s, t) {
    return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t)
}
function md5_hh(a, b, c, d, x, s, t) {
    return md5_cmn(b ^ c ^ d, a, b, x, s, t)
}
function md5_ii(a, b, c, d, x, s, t) {
    return md5_cmn(c ^ (b | (~d)), a, b, x, s, t)
}
function core_hmac_md5(key, data) {
    var bkey = str2binl(key);
    if (bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);
    var ipad = Array(16),
        opad = Array(16);
    for (var i = 0; i < 16; i++) {
            ipad[i] = bkey[i] ^ 0x36363636;
            opad[i] = bkey[i] ^ 0x5C5C5C5C
        }
    var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
    return core_md5(opad.concat(hash), 512 + 128)
}
function safe_add(x, y) {
    var lsw = (x & 0xFFFF) + (y & 0xFFFF);
    var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
    return (msw << 16) | (lsw & 0xFFFF)
}
function bit_rol(num, cnt) {
    return (num << cnt) | (num >>> (32 - cnt))
}
function str2binl(str) {
    var bin = Array();
    var mask = (1 << chrsz) - 1;
    for (var i = 0; i < str.length * chrsz; i += chrsz) bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (i % 32);
    return bin
}
function binl2str(bin) {
    var str = "";
    var mask = (1 << chrsz) - 1;
    for (var i = 0; i < bin.length * 32; i += chrsz) str += String.fromCharCode((bin[i >> 5] >>> (i % 32)) & mask);
    return str
}
function binl2hex(binarray) {
    var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
    var str = "";
    for (var i = 0; i < binarray.length * 4; i++) {
        str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) + hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF)
    }
    return str
}
function binl2b64(binarray) {
    var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    var str = "";
    for (var i = 0; i < binarray.length * 4; i += 3) {
        var triplet = (((binarray[i >> 2] >> 8 * (i % 4)) & 0xFF) << 16) | (((binarray[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 0xFF) << 8) | ((binarray[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 0xFF);
        for (var j = 0; j < 4; j++) {
            if (i * 8 + j * 6 > binarray.length * 32) str += b64pad;
            else str += tab.charAt((triplet >> 6 * (3 - j)) & 0x3F)
        }
    }
    return str
}
'''

f2 = '''
var d = {
    zero: ["0", "00", "000", "0000", "00000", "000000", "0000000", "00000000"],
    chars: ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'],
    strReverse: function (a) {
        var b, c = [];
        for (b = 0, l = a.length; b < l; b++) c[c.length] = a.charAt(b);
        return c.reverse().join("")
    },
    encrypt: function (a, b, e) {
        var a1 = d.shuzi(a);
        var a2 = d.zimu(a);
        a = a2 + a1;
        var f, g = [];
        for (f = 0, l = a.length; f < l; f++) g[g.length] = d.to(a.charCodeAt(f), b);
        return d.rnd(e ? d.strReverse(g.join("")) : g.join(""), 4)
    },
    to: function (a, c) {
        var e = "" + d.round(a + 88, c).toString(16),
            f = c - e.length;
        return f > 0 ? d.zero[f - 1] + e : e
    },
    round: function (a, b) {
        var c = 1 << 4 * b;
        return 0 > a ? a % c + c : a % c
    },
    shuzi: function (a) {
        return a.replace(/[^0-9]+/ig, "")
    },
    zimu: function (a) {
        return a.toLowerCase().replace(/https/g, "http").replace(/[^a-zA-Z]+/ig, "")
    },
    rnd: function (a, b) {
        return d.rd(b) + hex_md5(a) + d.rd(Math.ceil(Math.random() * 10))
    },
    rd: function (a) {
        var res = "";
        for (var i = 0; i < a; i++) {
            res += d.chars[Math.ceil(Math.random() * 35)]
        }
        return res
    }
}
'''

def get_token(item_url):
    token = None
    with PyV8.JSContext() as ctxt:
        ctxt.eval(f1)
        ctxt.eval(f2)
        token = ctxt.eval('''d.encrypt('%s', 2, true)''' % item_url)
    return token

def do_req(item_url, token):
    item_url_quoted = quote(item_url, safe='')
    xhr_url = 'http://tool.manmanbuy.com/history.aspx?DA=1&action=gethistory&url=%s&bjid=&spbh=&cxid=&zkid=&w=951&token=%s' \
        % (item_url_quoted, token)
    resp = requests.get(xhr_url, timeout=10)
    resp.encoding = 'GBK'
    data = json.loads(resp.text)
    return data

def send_berrychat(text):
    headers = {'content-type': 'application/json'}
    incoming_url = 'YOUR_BERRYCHAT_INCOMING_WEBHOOK_URL'
    payload = {"text": text}
    resp = requests.post(incoming_url, data=json.dumps(payload), headers=headers)
    return resp.status_code

if __name__ == "__main__":
    product_url = str(sys.argv[1])
    token = get_token(product_url)
    if token:
        data = do_req(product_url, token)
        date_price = data['datePrice']
        product_name = data['spName']
        price_list = re.findall(r'Date\.UTC\((\d+,\d+,\d+)\),(\d+)', date_price)
        lastday, current = price_list[-2:]
        last_price = float(lastday[1])
        current_price = float(current[1])
        if last_price > current_price:
            send_berrychat("亲, 你关注的 [%s] (链接: %s) 降价了, 当前价格: %s 元, 比上次价格少了 %.2f 元，快去买买买吧!" \
                % (product_name, product_url, current_price, last_price - current_price))