# 网易云评论抓取  含js逆向
# 'sortTypeList': [{'sortType': 1,
#     'sortTypeName': '按推荐排序',
#     'target': 'order_by_alg'},
#    {'sortType': 2,
#     'sortTypeName': '按热度排序',
#     'target': 'order_by_hot'},
#    {'sortType': 3,
#     'sortTypeName': '按时间排序',
#     'target': 'order_by_time'}],

#
from email import header
from re import M
import bs4
import requests
import random
import os
from fake_useragent import UserAgent

import json
import pprint


# pip install pycryptodome 安装加密算法库

from Crypto.Cipher import AES

# 导入b64解密模块
from base64 import b64encode


# js解密 逆向的 python模拟

url = 'https://music.163.com/weapi/comment/resource/comments/get?csrf_token='  # 评论的请求  其中
# "https://music.163.com/weapi/comment/resource/comments/get?csrf_token="
# csrf_token=参数表示 是否登录 请求方式为post

# 1.找到未加密的参数
# 2.依据网易云的逻辑加密参数 parmas , encSeckey
# 3.请求，获取评论信息

# 要点 查看 initiator

# 在程序发送请求的代码行处 设置断点 目的寻找发送的原始参数
# 原始参数
# cursor: -1
# offset: 0
# orderType: 1
# pageNo: 1
# pageSize: 20
# rid: "R_SO_4_66282"
# threadId: "R_SO_4_66282"

# var bVj7c = window.asrsea(JSON.stringify(i7b), bsR1x(["流泪", "强"]), bsR1x(Xp4t.md), bsR1x(["爱心", "女孩", "惊恐", "大笑"]));
# window.asrsea(参数（即原始参数），参数2，参数3，参数4)

# # 加密的js过程
# """
# !function() {
#     function a(a) {
#         var d, e, b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", c = "";
#         for (d = 0; a > d; d += 1)   #循环16次
#             e = Math.random() * b.length,  #随机数
#             e = Math.floor(e),#取整 1
#             c += b.charAt(e);#取字符串的某位置
#         return c
#     }
#     function b(a, b) {
#         var c = CryptoJS.enc.Utf8.parse(b)
#           , d = CryptoJS.enc.Utf8.parse("0102030405060708")
#           , e = CryptoJS.enc.Utf8.parse(a)
#           , f = CryptoJS.AES.encrypt(e, c, {
#             iv: d,
#             mode: CryptoJS.mode.CBC
#         });
#         return f.toString()
#     }
#     function c(a, b, c) {
#         var d, e;
#         return setMaxDigits(131),
#         d = new RSAKeyPair(b,"",c),
#         e = encryptedString(d, a)
#     }
#     function d(d, e, f, g) { data  ,010001,定值,
#         var h = {}
#           , i = a(16);
#         h.encText = b(d, g),
#         h.encText = b(h.encText, i), #返回的就是parmas
#         h.encSecKey = c(i, e, f), #得到 encSecKey 其中参数e，f是定值
#         return h
#     }
#     function e(a, b, d, e) {
#         var f = {};
#         return f.encText = c(a + e, b, d),
#         f
#     }
#     window.asrsea = d,
#     window.ecnonasr = e
# }();
# """
e = '010001'
f = '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'
g = '0CoJUm6Qyw8W8jud'
i = "IE06IfCaHglEITpd"
encSecKey = "83ff3e4570dc881c7c5a3c2c33aa7506872ee86bf9e19005e3f881cb0dca0df1921c9121b58e82a06b88e8a80cfa521a3b959fb53b7f8ec2bfbb0f25918f6daf771ac41196702baeb24ff181fdbb36ad901b0d17ea3d6ee78aee7e9858f3ce33273cf2f0b69302aeef55caaa15a8ec5aa6530a0be08f6458b59e4f7dbaba0376"

data = {
    'csrf_token': "",
    'cursor': "-1",
    'offset': "0",
    'orderType': "1",
    'pageNo': "1",
    'pageSize': "20",
    'rid': "R_SO_4_66282",
    'threadId': "R_SO_4_66282"
}

# print('hello,fuck')
# print(f)

# py模拟的加密过程 开始


def to_16(data):
    pad = 16-len(data) % 16
    data += chr(pad)*pad
    # print(data)
    return data


def get_params(data, g, i):
    one_time = parsms_enc(data, g)
    two_time = parsms_enc(one_time, i)
    print(two_time)
    return two_time


def parsms_enc(data, key):
    # key 为密钥
    # IV  为偏移量
    iv = "0102030405060708"
    # mode 加密模式
    data = to_16(data)
    aes = AES.new(key=key.encode('utf-8'), IV=iv.encode('utf-8'),
                  mode=AES.MODE_CBC)  # 创建加密器
    bs = aes.encrypt(data.encode('utf-8'))
    return str(b64encode(bs), 'utf-8')  # 转化为字符串返回

    # 加密过程 结束


if __name__ == '__main__':
    data = json.dumps(data)  # 将参数转换为json格式的字符串
    print(data)
    # to_16(data)
    # get_params(data, g, i)

    ua = UserAgent()
    headers = {
        'User-Agent': ua.random
    }
    enc_data = {
        'params': get_params(data, g, i),
        'encSecKey': encSecKey
    }
    resp = requests.post(url=url, headers=headers, data=enc_data)

    html_srouce = resp.json()

    resp.close()

    pprint.pprint(html_srouce)

    with open('./评论.txt', mode='w', encoding='utf-8') as f:
        json.dump(html_srouce, f)