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51 lines
1.6 KiB
Python
51 lines
1.6 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 或 youtu.be/xxxxx，ID 长度通常为 11
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match = re.search(r"(?:v=|youtu\.be/)([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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