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Asyncio client for Douyu live danmaku & room status / 斗鱼弹幕与房间状态 asyncio 客户端

Project description

aiodouyu

斗鱼弹幕与房间状态的 asyncio 客户端库 —— 零依赖、自动重连、干净停止。

English | 背景 | 安装 | 用法 | 房间信息 | 协议说明 | 局限与路线图

为什么有这个库

Python 生态里的斗鱼弹幕库已全部停止维护:pydouyu(2022 年后无更新)、danmu(2017)、danmaku(已归档)。aiodouyu 是这个空缺的现代替代品:

  • asyncio 优先:每个房间一个协程,不再是"每房间三个线程"
  • 零运行时依赖:纯标准库 TCP 实现
  • 自动重连:指数退避 + 抖动;空闲超时检测半开连接
  • 干净停止close() 立即中止,不遗留线程/任务(pydouyu 的停止会泄漏线程)
  • 完整消息流:rss(开播状态)、chatmsg(弹幕)、dgb(礼物)、uenter(进房)……全部透出
  • 可测试:附带完整测试套件与假服务器测试基建

安装

pip install aiodouyu

要求 Python >= 3.10。

用法

异步迭代(推荐)

import asyncio
from aiodouyu import DanmakuClient

async def main():
    async with DanmakuClient(room_id=9999) as client:
        async for msg in client:
            if msg["type"] == "chatmsg":
                print(f'{msg.get("nn")}: {msg.get("txt")}')
            elif msg["type"] == "rss":
                # ivl=='0' 排除视频轮播:轮播房的 ss 也是 '1'
                is_live = msg.get("ss") == "1" and msg.get("ivl") == "0"
                print("开播" if is_live else "下播")

asyncio.run(main())

回调注册

client = DanmakuClient(room_id=9999)

@client.on("rss")
def on_status(msg):
    print("直播状态变化:", msg)

@client.on("*")          # 通配符匹配所有消息
async def on_any(msg):   # 同步/异步回调均可
    ...

await client.run()       # 运行直到 client.close()

只订阅关心的消息类型

# 只做开播提醒?只要 rss,其他消息在解码后直接丢弃
client = DanmakuClient(room_id=9999, types={"rss"})

感知断连窗口

from aiodouyu import EVENT_CONNECTED, EVENT_DISCONNECTED

client = DanmakuClient(room_id=9999, emit_connection_events=True)
async for msg in client:
    if msg["type"] == EVENT_DISCONNECTED:
        ...  # 断连期间可能错过状态变化,可在重连后主动校准

斗鱼只在状态变化时推送 rss。断连窗口内的变化不会补发, 建议消费方在收到 EVENT_CONNECTED 后通过 fetch_room() 校准一次当前状态。

命令行冒烟测试

python -m aiodouyu 9999 --types rss,chatmsg --duration 30
python -m aiodouyu 9999 --info    # 查询房间信息后退出

房间信息(HTTP)

web 模块提供房间信息拉取,同样零依赖。典型用途:重连后校准直播状态、 获取标题/主播名/分类/封面用于通知富化。

from aiodouyu import fetch_room, RoomNotFound

info = await fetch_room(9999)
print(info.title, info.owner, info.category)   # 标题 / 主播名 / 分类
print(info.is_live)      # 是否真实开播(视频轮播不算,见 is_loop)
print(info.started_at)   # 本场开播 epoch 秒;未开播为 None
print(info.cover_url)    # 直播间封面

两个数据源,source 参数选择:

source 端点 特点
"betard"(默认优先) www.douyu.com/betard/{rid} 字段最全,videoLoop 可识别视频轮播
"open" open.douyucdn.cn/api/RoomApi/room/{rid} 公开 API 更稳定,但无法识别轮播
"auto"(默认) 先 betard,传输失败回退 open 房间不存在(RoomNotFound)不回退

open 源无法判定视频轮播:其 is_loopNone,轮播房会被报告为开播。 做开播状态校准时建议显式 source="betard"(失败则跳过本轮校准), 或在 is_loop is None 时自行决定是否信任 is_live

配合弹幕客户端做状态校准:

from aiodouyu import EVENT_CONNECTED, DanmakuClient, fetch_room

client = DanmakuClient(room_id=9999, types={"rss"}, emit_connection_events=True)
async for msg in client:
    if msg["type"] == EVENT_CONNECTED:
        info = await fetch_room(9999)     # 断连窗口内的变化在这里补上
        print("当前状态:", info.is_live)
    elif msg["type"] == "rss":
        print("状态变化:", msg.get("ss") == "1" and msg.get("ivl") == "0")

协议说明

连接 danmuproxy.douyu.com:8601(TCP),STT 序列化(@= 键值、/ 分隔、 @A/@S 转义),小端长度前缀成帧(发 689 / 收 690),loginreq + joingroup 握手,每 45 秒 mrkl 心跳。

注意:弹幕协议是斗鱼的非官方公开接口,端点与字段可能随时变更 (历史上已发生过一次域名迁移)。本库不隶属于斗鱼,请合理使用、避免滥用。

局限与路线图

当前局限:

  • STT 嵌套结构(如 ranklist 的分组数据)不展开,值以原始字符串返回
  • 仅 TCP 端点;WebSocket 端点(wss://danmuproxy.douyu.com:850x)未实现
  • 弹幕消息字段无类型化模型,以 dict[str, str] 返回
  • web 模块的 betard 数据源是网页端内部接口,字段可能随时变更 (auto 模式会自动回退到公开 API)

路线图:WebSocket 传输、常见消息类型的 typed model。欢迎 issue / PR。

English

Asyncio client for Douyu (斗鱼) live-stream danmaku and room-status events. Zero runtime dependencies, automatic reconnection with exponential backoff, idle-timeout detection for half-open connections, and clean shutdown. Consume messages via async for or callback registration. A zero-dependency web module (fetch_room) retrieves room metadata and live status over HTTP for state calibration after reconnects. The barrage protocol is an unofficial Douyu interface and may change without notice.

async with DanmakuClient(room_id=9999) as client:
    async for msg in client:
        print(msg)

info = await fetch_room(9999)   # title / owner / category / is_live ...

许可证

MIT

致谢

协议实现参考了 pydouyu(MIT)与社区对 斗鱼弹幕协议的公开分析文章。

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