因無聊用python寫了個爬藍奏云的爬蟲（含注釋并包裝為函式）

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你的點贊是對我的無盡支持
程式含金量雖然不高，但是也有點，大佬勿噴！
程式中的保存檔案及輸入鏈接未經處理，可以根據自己需求對代碼進行修改（比如加個input什么的），還請認真看注釋！！！

#作者CSDN:https://blog.csdn.net/qq_45429426?spm=1011.2124.3001.5343 漫游感知
#請勿轉載！！！！
#沒有的庫請用pip指令下載
import requests              #第三方庫，來發送請求等操作
import jsonpath               #第三方庫，來決議json資料
from lxml import etree         #第三方庫，來使用xpath決議網頁
import re

def lancode(url):
    url = str(url)
    headers = {
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
        'Accept-Encoding': 'gzip, deflate, br',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Cache-Control': 'max-age=0',
        'Connection': 'keep-alive',
        'Host': 'lzt666.lanzous.com',
        'Sec-Fetch-Dest': 'document',
        'Sec-Fetch-Mode': 'navigate',
        'Sec-Fetch-Site': 'none',
        'Sec-Fetch-User': '?1',
        'Upgrade-Insecure-Requests': '1',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36'
    }

    respeno = requests.get(url=url,headers=headers).text
    Html_lan_xpath = etree.HTML(respeno)
    two_url_yuan = Html_lan_xpath.xpath('/html/body/div[3]/div[2]/div[4]/iframe/@src')[0]
    two_url_replace = str(two_url_yuan).replace('/fn?','')
    two_list = [two_url_replace,two_url_yuan]        #一個不帶/fu?為請求頭做鋪墊，另一個則為請求表單做鋪墊
    return two_list

def get_download_url(url_list):
    page_url = 'https://lzt666.lanzous.com'+url_list[1]
    page_headers = {
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
        'Accept-Encoding': 'gzip, deflate, br',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Cache-Control': 'max-age=0',
        'Connection': 'keep-alive',
        'Cookie': 'codelen=1; pc_ad1=1',
        'Host': 'lzt666.lanzous.com',
        'Sec-Fetch-Dest': 'document',
        'Sec-Fetch-Mode': 'navigate',
        'Sec-Fetch-Site': 'none',
        'Sec-Fetch-User': '?1',
        'Upgrade-Insecure-Requests': '1',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36'
    }
    data = {
        '':url_list[0]
    }

    page_code_sign = requests.get(url=page_url,headers=page_headers,data=data).text
    # print(page_code_sign)
    txt = re.findall("'sign':(.*?),'ves'",page_code_sign)
    txt_re = str(txt[1]).replace("'",'')       #獲取正確傳參code

    url_post = 'https://lzt666.lanzous.com/ajaxm.php'
    headers = {
        'Accept': 'application/json, text/javascript, */*',
        'Accept-Encoding': 'gzip, deflate, br',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Connection': 'keep-alive',
        'Content-Length': '136',
        'Content-Type': 'application/x-www-form-urlencoded',
        'Cookie': 'codelen=1; pc_ad1=1',
        'Host': 'lzt666.lanzous.com',
        'Origin': 'https://lzt666.lanzous.com',
        'Referer': 'https://lzt666.lanzous.com' + url_list[1],
        'Sec-Fetch-Dest': 'empty',
        'Sec-Fetch-Mode': 'cors',
        'Sec-Fetch-Site': 'same-origin',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
        'X-Requested-With': 'XMLHttpRequest'
    }
    data = {
        'action': 'downprocess',
        'signs': '?ctdf',
        'sign': txt_re,
        'ves': '1',
        'websign': None
    }

    post_url_download = requests.post(url=url_post,headers=headers,data=data).json()
    # print(post_url_download)
    url_file = jsonpath.jsonpath(post_url_download,'$..url')[0]
    # print('Referer: https://lzt666.lanzous.com' + url_list[1],'sign:'+url_list[0])
    download_file_url = 'https://vip.d0.baidupan.com/file/' + url_file
    return str(download_file_url)                  #回傳檔案下載鏈接

def download(url):
    '''

    :param url: 需要下載的鏈接（前面函式已經決議好的）
    :return:
    '''
    url = str(url)
    data = {
        '': url.rsplit('/')[-1].replace('?','').replace('=',':')
    }

    headers = {
        'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
        'accept-encoding': 'gzip, deflate, br',
        'accept-language': 'zh-CN,zh;q=0.9',
        'cache-control': 'max-age=0',
        'cookie': 'down_ip=1',
        'sec-fetch-dest': 'document',
        'sec-fetch-mode': 'navigate',
        'sec-fetch-site': 'none',
        'sec-fetch-user': '?1',
        'upgrade-insecure-requests': '1',
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36'
    }

    file = requests.get(url=url,headers=headers,data=data).content
    with open('./1.zip','wb') as file_down:
        #這里測驗時下載的壓縮檔案，所以保存就這么寫了，用的時候可以根據自己的需求來改動
        file_down.write(file)
        file_down.close()
        print('完成下載')
        return True

a = lancode('https://lzt666.lanzous.com/xxxx')        #在這里放入鏈接
b = get_download_url(a)
download(b)