使用Python下载蓝奏云文件

蓝奏云下载

2022年04月21日编写

# -*- coding: utf-8 -*-

## Python3
## 下载蓝奏云文件
## 参考链接：https://blog.csdn.net/qq_45429426/article/details/119819665

import os
import re
import sys
import json
import time
import requests
import urllib.parse
from lxml import etree


## 请求lanzouyun_url，获取transfer_url
def get_transfer_url(host_url,lanzouyun_url):
    lanzouyun_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',
        'ccept-encoding': 'gzip, deflate, br',
        'accept-language': 'zh-CN,zh;q=0.9',
        'cache-control': 'max-age=0',
        'cookie': 'codelen=1; pc_ad1=1',
        'referer': lanzouyun_url,
        'sec-ch-ua': '"Chromium";v="92", " Not A;Brand";v="99", "Google Chrome";v="92"',
        'sec-ch-ua-mobile': '?0',
        'sec-fetch-dest': 'iframe',
        'sec-fetch-mode': 'navigate',
        'sec-fetch-site': 'same-origin',
        '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/92.0.4515.159 Safari/537.36'
    }

    transfer_response = requests.get(url=transfer_url, headers=transfer_headers)
    # print('n[*] transfer_response:')
    # print(transfer_response.text)

    ## 请求data
    # action=downprocess&signs=%3Fctdf&sign=BWMBPww9VGVVXFFuVGRWalo2V2pTPAs_aADNUYgJpV2NUclR3WztQNVIyBGcEYAE1UjgOMl8yUWIKNQ_c_c&ves=1&websign=&websignkey=z4Fd

    ## 第一次解析
    first_re_data = re.findall(r'data : ({.*?})',transfer_response.text)[0].replace(' ','')
    print('n[*] first_re_data:')
    print(first_re_data)

    signs = re.findall(r'signs':(.*?),'sign',first_re_data)[0]
    sign = re.findall(r'sign':(.*?),'ves',first_re_data)[0].strip("'")
    websignkey = re.findall(r'websignkey':(.*?)}',first_re_data)[0]
    print('n[*] signs:', signs)
    print('[*] sign:', sign)
    print('[*] websignkey:', websignkey)

    ajax_data = 'action=downprocess&signs=%s&sign=%s&ves=1&websign=&websignkey=%s' % (urllib.parse.quote(signs),sign,websignkey)
    print('n[*] ajax_data:')
    print(ajax_data)

    return ajax_data


## 请求ajax_url，获取download_url
def get_download_url(host_url,transfer_url,ajax_data):
    ajax_url = host_url + '/' + 'ajaxm.php'
    ajax_headers = {
        'accept': 'application/json, text/javascript, **;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-ch-ua': '"Chromium";v="92", " Not A;Brand";v="99", "Google Chrome";v="92"',
        'sec-ch-ua-mobile': '?0',
        '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/92.0.4515.159 Safari/537.36'
    }

    download_response = requests.get(url=download_url,headers=download_headers)
    file_data = download_response.content 
    with open('./' + file_name,'wb') as save_file:
        #保存文件数据
        save_file.write(file_data)
        save_file.close()
    
    print('n[*] 文件下载完成')


## 主函数部分
def main():
    lanzouyun_url = input('n[*] 请输入蓝奏云链接：')
    ## 获取host_url
    host_url = 'https://' + lanzouyun_url.split('/')[2]
    ## 请求lanzouyun_url，获取transfer_url
    transfer_data = get_transfer_url(host_url,lanzouyun_url)
    file_name = transfer_data[0] 
    transfer_url = transfer_data[1]
    ## 请求transfer_url，获取ajax_data
    ajax_data = get_ajax_data(lanzouyun_url,transfer_url)
    ## 获取download_url
    download_url = get_download_url(host_url,transfer_url,ajax_data)
    ## 下载文件
    download_file(download_url,file_name)


if __name__ == '__main__':
    main()