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playwright 入门使用介绍
简单使用如下。这种模式会触发抖音的风控机制，出现验证码中间页。
image-20230318171402213.png (152.56 KB, 下载次数: 0)
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# 抖音分享链接
share_url = 'https://v.douyin.com/SGGxvfM/'
# 创建浏览器打开分享地址
# 因为可能会触发抖音的风控机制，所以这里先设置为有头模式，当触发验证码中间页时，手动处理下
browser = sync_playwright().start().chromium.launch(headless=False)
context = browser.new_context()
page = context.new_page()
page.goto(share_url)
# 获取标签及视频播放地址
page.wait_for_load_state()
video = page.wait_for_selector('video')
print(video)
source = video.query_selector_all('source')
video_src = source[0].get_attribute("src")
video_src = 'https:' + video_src
print(video_src)
file_name = 'result.mp4'
print('开始下载视频...')
response = requests.get(video_src, stream=True)
with open(file_name, "wb") as file:
file.write(response.content)
print('下载完成')
另辟出路
因为会触发中间验证页，虽然也可以使用 playwright 处理验证码，但是速度慢，同时验证方式更改就得更改总之不好。
背景信息
分享短链地址 ：https://v.douyin.com/SGGxvfM/
重定向后的实际地址：https://www.douyin.com/video/7210719593298464003
流程：抖音的短链经过重定向后才会得到实际地址
中间过程就会拿到服务器写回的cookie信息
实际地址的请求是个document类型的内容，重点来了：document里的script标签的ID是RENDER_DATA，type是application/json，把标签里内容解码一下果然是我们想要的内容。
截图如下
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image-20230321100549151.png (579.19 KB, 下载次数: 0)
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image-20230321100735851.png (898.79 KB, 下载次数: 0)
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处理逻辑
有了上面的背景信息，那处理逻辑也很简单了。
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import json
import re
import requests
from playwright.sync_api import sync_playwright
from bs4 import BeautifulSoup
from urllib.parse import unquote
share_url = 'https://v.douyin.com/SGGxvfM/'
browser = sync_playwright().start().chromium.launch(headless=True)
context = browser.new_context()
page = context.new_page()
page.goto(share_url)
cookies = page.context.cookies()
result_cookie = ''
for item in cookies:
if item['name'] == '__ac_nonce':
# document_header['__ac_nonce'] = item['value']
result_cookie = result_cookie + '__ac_nonce=' + item['value'] + ';'
if item['name'] == '__ac_signature':
result_cookie = result_cookie + '__ac_signature=' + item['value'] + ';'
document_header = {
'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36',
'sec-fetch-dest': 'document',
'sec-fetch-mode': 'navigate',
'sec-fetch-site': 'same-origin',
'sec-ch-ua-platform': 'macOS',
'sec-ch-ua': '"Google Chrome";v="111", "Not(A:Brand";v="8", "Chromium";v="111"',
'sec-ch-ua-mobile': '?0',
'upgrade-insecure-requests': '1',
'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=0.7',
'cookie': result_cookie
}
# print(page.url)
url = page.url
# url = 'https://www.iesdouyin.com/share/video/7210719593298464003/?region=CN&mid=7210720503894805308&u_code=33j73e481hda&did=MS4wLjABAAAAyWxE53gU-qg10uh4jIbo0XpO2_I8z5fpPlI_pBAlio7gocacNdKp0p4KSAydSgC_&iid=MS4wLjABAAAALt7iss0DroHh-NMLV6ZFi-4uYP-lTU-NqsBOH3GQxng6bxW6xVoJ7AHXunv0YjHv&with_sec_did=1&titleType=title&from_ssr=1×tamp=1678941771&utm_campaign=client_share&app=aweme&utm_medium=ios&tt_from=copy&utm_source=copy'
search_result = re.search('https://www.iesdouyin.com/share/video/(.+?)/', url)
video_id = search_result.group(1)
video_url = 'https://www.douyin.com/video/' + video_id + '?previous_page=app_code_link'
video_detail_response = requests.get(video_url, headers=document_header)
soup = BeautifulSoup(video_detail_response.text)
encode_data = soup.find('script', {'id': 'RENDER_DATA'}).get_text()
decode_data = unquote(encode_data)
decode_data = json.loads(decode_data)
video_url = decode_data['44']['aweme']['detail']['video']['playAddr'][0]['src']
video_src = 'https:' + video_url
print(video_src)
file_name = 'result.mp4'
print('开始下载视频...')
response = requests.get(video_src, stream=True)
with open(file_name, "wb") as file:
file.write(response.content)
print('下载完成')
额外其他
可以包装成接口对外使用了，上次发了试用的小程序，不符合版规被删帖了这次就不发了。
