Python3爬虫实例之网易云音乐爬虫

function() {
 // 生成长度为16的随机字符串
 function a(a) {
 var d, e, b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", c = "";
 for (d = 0; a > d; d += 1)
 e = Math.random() * b.length,
 e = Math.floor(e),
 c += b.charAt(e);
 return c
 }
 // 实现AES加密
 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()
 }
 // 实现RSA加密
 function c(a, b, c) {
 var d, e;
 return setMaxDigits(131),
 d = new RSAKeyPair(b,"",c),
 e = encryptedString(d, a)
 }
 // 得到加密后的结果
 function d(d, e, f, g) {
 var h = {}
 , i = a(16);
 return h.encText = b(d, g),
 h.encText = b(h.encText, i),
 h.encSecKey = c(i, e, f),
 h
 }
 function e(a, b, d, e) {
 var f = {};
 return f.encText = c(a + e, b, d),
 f
 }
}()

# 生成随机字符串
def generate_random_string(length):
 string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 # 初始化随机字符串
 random_string = ""
 # 生成一个长度为length的随机字符串
 for i in range(length):
 random_string += string[int(floor(random() * len(string)))]
 return random_string

# AES加密
def aes_encrypt(msg, key):
 # 如果不是16的倍数则进行填充
 padding = 16 - len(msg) % 16
 # 这里使用padding对应的单字符进行填充
 msg += padding * chr(padding)
 # 用来加密或者解密的初始向量(必须是16位)
 iv = '0102030405060708'
 # AES加密
 cipher = AES.new(key, AES.MODE_CBC, iv)
 # 加密后得到的是bytes类型的数据
 encrypt_bytes = cipher.encrypt(msg)
 # 使用Base64进行编码,返回byte字符串
 encode_string = base64.b64encode(encrypt_bytes)
 # 对byte字符串按utf-8进行解码
 encrypt_text = encode_string.decode('utf-8')
 # 返回结果
 return encrypt_text

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

'{"offset":'+str(offset)+',"total":"True","limit":"20","csrf_token":""}'

# 获取参数
def get_params(page):
 # 偏移量
 offset = (page - 1) * 20
 # offset和limit是必选参数,其他参数是可选的
 msg = '{"offset":' + str(offset) + ',"total":"True","limit":"20","csrf_token":""}'
 key = '0CoJUm6Qyw8W8jud'
 f = '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a87' 
 '6aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9' 
 'd05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b' 
 '8e289dc6935b3ece0462db0a22b8e7'
 e = '010001'
 # 生成长度为16的随机字符串
 i = generate_random_string(16)
 # 第一次AES加密
 enc_text = aes_encrypt(msg, key)
 # 第二次AES加密之后得到params的值
 encText = aes_encrypt(enc_text, i)
 # RSA加密之后得到encSecKey的值
 encSecKey = rsa_encrypt(i, e, f)
 return encText, encSecKey

# 爬取评论内容
def get_comments(data):
 # data=[song_id,song_name,page_num]
 url = 'https://music.163.com/weapi/v1/resource/comments/R_SO_4_' + str(data[0]) + '?csrf_token='
 # 得到两个加密参数
 text, key = get_params(data[2])
 # 发送post请求
 res = requests.post(url, headers=headers, data={"params": text, "encSecKey": key})
 if res.status_code == 200:
 print("正在爬取第{}页的评论".format(data[2]))
 # 解析
 comments = res.json()['comments']
 # 存储
 with open(data[1] + '.txt', 'a', encoding="utf-8") as f:
 for i in comments:
 f.write(i['content'] + "
")
 else:
 print("爬取失败！")

# 生成词云
def make_cloud(txt_name):
 with open(txt_name + ".txt", 'r', encoding="utf-8") as f:
 txt = f.read()
 # 结巴分词
 text = ''.join(jieba.cut(txt))
 # 定义一个词云
 wc = WordCloud(
 font_path="font.ttf",
 width=1200,
 height=800,
 max_words=100,
 max_font_size=200,
 min_font_size=10
 )
 # 生成词云
 wc.generate(text)
 # 保存为图片
 wc.to_file(txt_name + ".png")