Python爬虫 bilibili视频弹幕提取过程详解

脚本专栏 2025/1/10 佚名

3 2 1

两个重要点

1.获取弹幕的url是以 .xml 结尾

2.弹幕url的所需参数在视频url响应的 javascript 中

先看代码

import requests
from lxml import etree
import re
# 使用手机UA
headers = {
  "User-Agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Mobile/15A372 Safari/604.1"
}
# 视频url
video_url = "https://m.bilibili.com/video/av37834086.html"
html = requests.get(url=video_url, headers=headers).content.decode('utf-8')
# 获取弹幕url的参数
cid = re.findall(r"comment: '//comment.bilibili.com/' \+ (.*", html)
url = "https://comment.bilibili.com/" + cid[0] + ".xml"
print(url)
response = requests.get(url, headers=headers)
html = response.content
xml = etree.HTML(html)
# 提取数据
str_list = xml.xpath("//d/text()")
# 写入文件
with open('bibi_xuxubaobao.txt', 'w', encoding='utf-8') as f:
  for line in str_list:
    f.write(line)
    f.write('\n')

先找到弹幕的url，以.xml结尾，所以先找到这串数字所在的位置，并获取这串数字发起第二次请求