get_lyric.py

#! /usr/bin/python
# coding='utf-8'
"""
获取网易云歌曲歌词的Python爬虫
Author: zhouzying
URL: www.zhouzying.cn
Data: 2018-10-29
"""
import requests
import math
import random
# pycrypto
from Crypto.Cipher import AES
import codecs
import base64


# 生成16个随机字符
def generate_random_strs(length):
    string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
    # 控制次数参数i
    i = 0
    # 初始化随机字符串
    random_strs  = ""
    while i < length:
        e = random.random() * len(string)
        # 向下取整
        e = math.floor(e)
        random_strs = random_strs + list(string)[e]
        i = i + 1
    return random_strs


# AES加密
def AESencrypt(msg, key):
    # 如果不是16的倍数则进行填充(paddiing)
    padding = 16 - len(msg) % 16
    # 这里使用padding对应的单字符进行填充
    msg = msg + padding * chr(padding)
    # 用来加密或者解密的初始向量(必须是16位)
    iv = '0102030405060708'

    cipher = AES.new(key, AES.MODE_CBC, iv)
    # 加密后得到的是bytes类型的数据
    encryptedbytes = cipher.encrypt(msg)
    # 使用Base64进行编码,返回byte字符串
    encodestrs = base64.b64encode(encryptedbytes)
    # 对byte字符串按utf-8进行解码
    enctext = encodestrs.decode('utf-8')

    return enctext


# RSA加密
def RSAencrypt(randomstrs, key, f):
    # 随机字符串逆序排列
    string = randomstrs[::-1]
    # 将随机字符串转换成byte类型数据
    text = bytes(string, 'utf-8')
    seckey = int(codecs.encode(text, encoding='hex'), 16)**int(key, 16) % int(f, 16)
    return format(seckey, 'x').zfill(256)


# 获取参数
def get_params(songid):
    # id为歌曲的id号,后面的lv和tv都是固定值
    msg = '{id: ' + str(songid) + ', lv: -1, tv: -1}'
    key = '0CoJUm6Qyw8W8jud'
    f = '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'
    e = '010001'
    enctext = AESencrypt(msg, key)
    # 生成长度为16的随机字符串
    i = generate_random_strs(16)

    # 两次AES加密之后得到params的值
    encText = AESencrypt(enctext, i)
    # RSA加密之后得到encSecKey的值
    encSecKey = RSAencrypt(i, e, f)
    return encText, encSecKey


def main():

    # Dream it possible
    # 歌曲id号
    songid = 38592976
    # params的长度为108,不要拿浏览器控制面板中的数据进行测试,那里的params长度为128,不符合
    params, encSecKey = get_params(songid)
    data = {'params': params, 'encSecKey': encSecKey}
    url = 'https://music.163.com/weapi/song/lyric?csrf_token='
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/66.0.3359.181 Safari/537.36'}
    r = requests.post(url, headers=headers, data=data)
    # 状态码
    print(r.status_code)
    print(r.json())


if __name__ == "__main__":
    main()