NeoBot/plugins/bili_parser.py

# -*- coding: utf-8 -*-
import re
import json
import aiohttp
from bs4 import BeautifulSoup
from typing import Optional, Dict, Any, Union
from cachetools import TTLCache

from core.utils.logger import logger
from core.managers.command_manager import matcher
from models import MessageEvent, MessageSegment

# 创建一个TTL缓存，最大容量100，缓存时间10秒
processed_messages: TTLCache[int, bool] = TTLCache(maxsize=100, ttl=10)

# 插件元数据
__plugin_meta__ = {
    "name": "bili_parser",
    "description": "自动解析B站分享卡片，提取视频封面和播放量等信息。",
    "usage": "（自动触发）当检测到B站小程序分享卡片时，自动发送视频信息。",
}

# 常量定义
BILI_NICKNAME = "B站视频解析"

HEADERS = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
}

# 全局共享的 ClientSession
_session: Optional[aiohttp.ClientSession] = None

async def get_session() -> aiohttp.ClientSession:
    global _session
    if _session is None or _session.closed:
        _session = aiohttp.ClientSession(headers=HEADERS)
    return _session


def format_count(num: int) -> str:
    if not isinstance(num, int):
        return str(num)
    if num < 10000:
        return str(num)
    return f"{num / 10000:.1f}万"


def format_duration(seconds: int) -> str:
    """将秒数格式化为 MM:SS 的形式"""
    if not isinstance(seconds, int) or seconds < 0:
        return "滚木"
    minutes, seconds = divmod(seconds, 60)
    return f"{minutes:02d}:{seconds:02d}"


async def get_real_url(short_url: str) -> Optional[str]:
    try:
        session = await get_session()
        async with session.head(short_url, headers=HEADERS, allow_redirects=False, timeout=5) as response:
            if response.status == 302:
                return response.headers.get('Location')
    except Exception as e:
        logger.error(f"获取真实URL失败: {e}")
    return None

async def parse_video_info(video_url: str) -> Optional[Dict[str, Any]]:
    try:
        session = await get_session()
        async with session.get(video_url, headers=HEADERS, timeout=5) as response:
            response.raise_for_status()
            text = await response.text()
            soup = BeautifulSoup(text, 'html.parser')

        script_tag = soup.find('script', text=re.compile('window.__INITIAL_STATE__'))
        if not script_tag or not script_tag.string:
            return None
            
        match = re.search(r'window\.__INITIAL_STATE__\s*=\s*(\{[^\}]*\});', script_tag.string)
        if not match:
            return None
            
        json_str = match.group(1)
        data = json.loads(json_str)
        
        video_data = data.get('videoData', {})
        up_data = data.get('upData', {})
        stat = video_data.get('stat', {})
        owner = video_data.get('owner', {})

        cover_url = video_data.get('pic', '')
        if cover_url:
            cover_url = cover_url.split('@')[0]
            if cover_url.startswith('//'):
                cover_url = 'https:' + cover_url
        
        owner_avatar = owner.get('face', '')
        if owner_avatar:
            if owner_avatar.startswith('//'):
                owner_avatar = 'https:' + owner_avatar
            owner_avatar = owner_avatar.split('@')[0]

        return {
            "title": video_data.get('title', '未知标题'),
            "bvid": video_data.get('bvid', '未知BV号'),
            "duration": video_data.get('duration', 0),
            "cover_url": cover_url,
            "play": stat.get('view', 0),
            "like": stat.get('like', 0),
            "coin": stat.get('coin', 0),
            "favorite": stat.get('favorite', 0),
            "share": stat.get('share', 0),
            "owner_name": owner.get('name', '未知UP主'),
            "owner_avatar": owner_avatar,
            "followers": up_data.get('fans', 0),
        }

    except (aiohttp.ClientError, KeyError, AttributeError, json.JSONDecodeError) as e:
        logger.error(f"解析视频信息失败: {e}")
    
    return None

async def get_direct_video_url(video_url: str) -> Optional[str]:
    """
    调用第三方API解析B站视频直链
    :param video_url: B站视频的完整URL
    :return: 视频直链URL，如果失败则返回None
    """
    api_url = f"https://api.mir6.com/api/bzjiexi?url={video_url}&type=json"
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(api_url, headers=HEADERS, timeout=10) as response:
                response.raise_for_status()
                # 使用 content_type=None 来忽略 Content-Type 检查
                # 因为 API 返回 text/json 而不是标准的 application/json
                data = await response.json(content_type=None)
                if data.get("code") == 200 and data.get("data"):
                    return data["data"][0].get("video_url")
    except (aiohttp.ClientError, json.JSONDecodeError, KeyError, IndexError) as e:
        logger.error(f"[bili_parser] 调用第三方API解析视频失败: {e}")
    return None

BILI_URL_PATTERN = re.compile(r"https?://(?:www\.)?(bilibili\.com/video/\w+|b23\.tv/[a-zA-Z0-9]+)")


def extract_url_from_json_segments(segments):
    """
    从消息的JSON段中提取B站链接
    :param segments: 消息段列表
    :return: 提取到的URL或None
    """
    for segment in segments:
        if segment.type == "json":
            logger.info(f"[bili_parser] 检测到JSON CQ码: {segment.data}")
            try:
                json_data = json.loads(segment.data.get("data", "{}"))
                short_url = json_data.get("meta", {}).get("detail_1", {}).get("qqdocurl")
                
                if short_url and "b23.tv" in short_url:
                    extracted_url = short_url.split('?')[0]
                    logger.success(f"[bili_parser] 成功从JSON卡片中提取到B站短链接: {extracted_url}")
                    return extracted_url
            except (json.JSONDecodeError, KeyError) as e:
                logger.error(f"[bili_parser] 解析JSON失败: {e}")
                continue
    return None

def extract_url_from_text_segments(segments):
    """
    从消息的文本段中提取B站链接
    :param segments: 消息段列表
    :return: 提取到的URL或None
    """
    for segment in segments:
        if segment.type == "text":
            text_content = segment.data.get("text", "")
            match = BILI_URL_PATTERN.search(text_content)
            if match:
                extracted_url = match.group(0)
                logger.success(f"[bili_parser] 成功从文本中提取到B站链接: {extracted_url}")
                return extracted_url
    return None

@matcher.on_message()
async def handle_bili_share(event: MessageEvent):
    """
    处理消息，检测B站分享链接（JSON卡片或文本链接）并进行解析。
    :param event: 消息事件对象
    """
    # 消息去重
    if event.message_id in processed_messages:
        return
    processed_messages[event.message_id] = True
    
    # 忽略机器人自己发送的消息，防止无限循环
    if event.user_id == event.self_id:
        return
        
    # 1. 优先解析JSON卡片中的短链接
    url_to_process = extract_url_from_json_segments(event.message)
    
    # 2. 如果未在JSON卡片中找到链接，则在文本消息中查找
    if not url_to_process:
        url_to_process = extract_url_from_text_segments(event.message)

    # 3. 如果找到了任何类型的B站链接，则进行处理
    if url_to_process:
        await process_bili_link(event, url_to_process)

async def process_bili_link(event: MessageEvent, url: str):
    """
    处理B站链接（长链接或短链接），获取信息并回复
    :param event: 消息事件对象
    :param url: 待处理的B站链接
    """
    if "b23.tv" in url:
        real_url = await get_real_url(url)
        if not real_url:
            logger.error(f"[bili_parser] 无法从 {url} 获取真实URL。")
            await event.reply("无法解析B站短链接。")
            return
    else:
        real_url = url.split('?')[0]

    video_info = await parse_video_info(real_url)
    if not video_info:
        logger.error(f"[bili_parser] 无法从 {real_url} 解析视频信息。")
        await event.reply("无法获取视频信息，可能是B站接口变动或视频不存在。")
        return

    # 检查视频时长
    video_message: Union[str, MessageSegment]
    if video_info['duration'] > 300:  # 5分钟 = 300秒
        video_message = "视频时长超过5分钟，不进行解析。"
    else:
        direct_url = await get_direct_video_url(real_url)
        if direct_url:
            video_message = MessageSegment.video(direct_url)
        else:
            video_message = "视频解析失败，无法获取直链。"

    text_message = (
        f"BiliBili 视频解析\n"
        f"--------------------\n"
        f" UP主: {video_info['owner_name']}\n"
        f" 粉丝: {format_count(video_info['followers'])}\n"
        f"--------------------\n"
        f" 标题: {video_info['title']}\n"
        f" BV号: {video_info['bvid']}\n"
        f" 时长: {format_duration(video_info['duration'])}\n"
        f"--------------------\n"
        f" 数据:\n"
        f"   播放: {format_count(video_info['play'])}\n"
        f"   点赞: {format_count(video_info['like'])}\n"
        f"   投币: {format_count(video_info['coin'])}\n"
        f"   收藏: {format_count(video_info['favorite'])}\n"
        f"   转发: {format_count(video_info['share'])}\n"
        f"   B站链接: {url}"
    )
    
    image_message_segment = [
        MessageSegment.text("B站封面："),
        MessageSegment.image(video_info['cover_url'])
    ]

    up_info_segment = [
        MessageSegment.text("UP主头像："),
        MessageSegment.image(video_info['owner_avatar'])
    ]

    nodes = [
        event.bot.build_forward_node(user_id=event.self_id, nickname=BILI_NICKNAME, message=text_message),
        event.bot.build_forward_node(user_id=event.self_id, nickname=BILI_NICKNAME, message=image_message_segment),
        event.bot.build_forward_node(user_id=event.self_id, nickname=BILI_NICKNAME, message=up_info_segment),
        event.bot.build_forward_node(user_id=event.self_id, nickname=BILI_NICKNAME, message=video_message)
    ]
    
    logger.success(f"[bili_parser] 成功解析视频信息并准备以聊天记录形式回复: {video_info['title']}")
    # 使用更通用的 send_forwarded_messages 方法，自动判断私聊或群聊
    await event.bot.send_forwarded_messages(target=event, nodes=nodes)