mirror of
https://github.com/JefferyHcool/BiliNote.git
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84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
import re
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from typing import Optional
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import requests
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def extract_video_id(url: str, platform: str) -> Optional[str]:
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"""
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从视频链接中提取视频 ID
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:param url: 视频链接
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:param platform: 平台名（bilibili / youtube / douyin）
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:return: 提取到的视频 ID 或 None
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"""
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if platform == "bilibili":
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# 如果是短链接，则解析真实链接
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if "b23.tv" in url:
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resolved_url = resolve_bilibili_short_url(url)
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if resolved_url:
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url = resolved_url
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# 匹配 BV号（如 BV1vc411b7Wa）
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match = re.search(r"BV([0-9A-Za-z]+)", url)
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return f"BV{match.group(1)}" if match else None
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elif platform == "youtube":
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# 匹配 v=xxxxx、youtu.be/xxxxx 或 shorts/xxxxx，ID 长度通常为 11
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match = re.search(r"(?:v=|youtu\.be/|shorts/)([0-9A-Za-z_-]{11})", url)
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return match.group(1) if match else None
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elif platform == "douyin":
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# 匹配 douyin.com/video/1234567890123456789
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match = re.search(r"/video/(\d+)", url)
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return match.group(1) if match else None
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return None
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def resolve_bilibili_short_url(short_url: str) -> Optional[str]:
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"""
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解析哔哩哔哩短链接以获取真实视频链接
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:param short_url: Bilibili短链接（如"https://b23.tv/xxxxxx"）
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:return: 真实的视频链接或None
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"""
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try:
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response = requests.head(short_url, allow_redirects=True)
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return response.url
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except requests.RequestException as e:
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print(f"Error resolving short URL: {e}")
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return None
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def extract_bilibili_p_number(url: str) -> Optional[int]:
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"""
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从 B 站分 P 视频 URL 中提取 p 参数（分 P 序号）。
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支持格式：
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- https://www.bilibili.com/video/BVxxx/?p=36
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- https://www.bilibili.com/video/BVxxx?p=5
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- https://b23.tv/xxxxx?p=10
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- https://www.bilibili.com/video/BVxxx/pN (尾缀形式)
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:param url: B 站视频链接
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:return: 分 P 序号（从 1 开始），非分 P 视频返回 None
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"""
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if "b23.tv" in url:
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url = resolve_bilibili_short_url(url) or url
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# 匹配 ?p=NNN 或 &p=NNN
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match = re.search(r'[?&]p=(\d+)', url)
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if match:
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p = int(match.group(1))
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if p >= 1:
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return p
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# 匹配 /pN 尾缀形式（较少见）
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match = re.search(r'/p(\d+)(?:/?$|\?|&)', url)
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if match:
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p_val = int(match.group(1))
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if p_val >= 1:
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return p_val
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return None
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