Python下载西瓜视频

# coding:utf8
import re
import requests
import random
from zlib import crc32
from base64 import b64decode
 
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTHL, like Gecko) Chrome/66.0.3359.181 Safari/537.36",
}
    
def get_video_url_api(video_id=''):
    '''取视频所在包的uri'''
    r = str(random.random())[2:]
    url_part = "/video/urls/v/l/toutiao/mp4/{}?r={}".format(video_id, r) 
    s = crc32(url_part.encode())
    url = "https://ib.365yg.com{}&s={}".format(url_part,s) 
    return url
 
def get_video_url(url):
    #获取视频地址
    resp = requests.get(url, headers=headers) 
    j_resp = resp.json()
    video_url = j_resp['data']['video_list']['video_1']['main_url'] 
    video_url = b64decode(video_url.encode()).decode() 
    return video_url
 
def get_video_id(url):
    #获取视频id
    resp = requests.get(url, headers=headers)
    # 获取video_id
    #print(resp.text)
    search = re.search("\"vid\":\"([^\"]+)\",", resp.text)
    print(search.group(1))
    return search.group(1)
 
def main():
    url = "https://www.ixigua.com/i6805710405143364108/?logTag=9PCH2MHCcUssO7FjfrgP6" 
    video_id = get_video_id(url)
    if video_id == None: 
        print("get video_id error")
        return
    video_url_api = get_video_url_api(video_id)
    print(video_url_api.encode())
    video_url = get_video_url(video_url_api)
    print(video_url)
    return
 
if __name__ == '__main__':
    main()