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https://gitee.com/wanwujie/deer-flow
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feat: add IM channels for Feishu, Slack, and Telegram (#1010)
* feat: add IM channels system for Feishu, Slack, and Telegram integration Bridge external messaging platforms to DeerFlow via LangGraph Server with async message bus, thread management, and per-channel configuration. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: address review comments on IM channels system Fix topic_id handling in store remove/list_entries and manager commands, correct Telegram reply threading, remove unused imports/variables, update docstrings and docs to match implementation, and prevent config mutation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * update skill creator * fix im reply text * fix comments --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
DanielWalnut
301
backend/src/channels/feishu.py
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301
backend/src/channels/feishu.py
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"""Feishu/Lark channel — connects to Feishu via WebSocket (no public IP needed)."""
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from __future__ import annotations
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import asyncio
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import json
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import logging
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import threading
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from typing import Any
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from src.channels.base import Channel
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from src.channels.message_bus import InboundMessageType, MessageBus, OutboundMessage
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logger = logging.getLogger(__name__)
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class FeishuChannel(Channel):
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"""Feishu/Lark IM channel using the ``lark-oapi`` WebSocket client.
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Configuration keys (in ``config.yaml`` under ``channels.feishu``):
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- ``app_id``: Feishu app ID.
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- ``app_secret``: Feishu app secret.
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- ``verification_token``: (optional) Event verification token.
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The channel uses WebSocket long-connection mode so no public IP is required.
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Message flow:
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1. User sends a message → bot adds "OK" emoji reaction
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2. Bot replies in thread: "Working on it......"
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3. Agent processes the message and returns a result
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4. Bot replies in thread with the result
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5. Bot adds "DONE" emoji reaction to the original message
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"""
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def __init__(self, bus: MessageBus, config: dict[str, Any]) -> None:
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super().__init__(name="feishu", bus=bus, config=config)
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self._thread: threading.Thread | None = None
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self._main_loop: asyncio.AbstractEventLoop | None = None
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self._api_client = None
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self._CreateMessageReactionRequest = None
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self._CreateMessageReactionRequestBody = None
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self._Emoji = None
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async def start(self) -> None:
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if self._running:
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return
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try:
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import lark_oapi as lark
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from lark_oapi.api.im.v1 import (
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CreateMessageReactionRequest,
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CreateMessageReactionRequestBody,
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CreateMessageRequest,
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CreateMessageRequestBody,
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Emoji,
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ReplyMessageRequest,
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ReplyMessageRequestBody,
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)
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except ImportError:
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logger.error("lark-oapi is not installed. Install it with: uv add lark-oapi")
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return
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self._lark = lark
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self._CreateMessageRequest = CreateMessageRequest
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self._CreateMessageRequestBody = CreateMessageRequestBody
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self._ReplyMessageRequest = ReplyMessageRequest
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self._ReplyMessageRequestBody = ReplyMessageRequestBody
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self._CreateMessageReactionRequest = CreateMessageReactionRequest
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self._CreateMessageReactionRequestBody = CreateMessageReactionRequestBody
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self._Emoji = Emoji
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app_id = self.config.get("app_id", "")
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app_secret = self.config.get("app_secret", "")
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if not app_id or not app_secret:
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logger.error("Feishu channel requires app_id and app_secret")
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return
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self._api_client = lark.Client.builder().app_id(app_id).app_secret(app_secret).build()
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self._main_loop = asyncio.get_event_loop()
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self._running = True
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self.bus.subscribe_outbound(self._on_outbound)
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# Both ws.Client construction and start() must happen in a dedicated
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# thread with its own event loop. lark-oapi caches the running loop
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# at construction time and later calls loop.run_until_complete(),
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# which conflicts with an already-running uvloop.
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self._thread = threading.Thread(
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target=self._run_ws,
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args=(app_id, app_secret),
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daemon=True,
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)
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self._thread.start()
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logger.info("Feishu channel started")
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def _run_ws(self, app_id: str, app_secret: str) -> None:
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"""Construct and run the lark WS client in a thread with a fresh event loop.
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The lark-oapi SDK captures a module-level event loop at import time
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(``lark_oapi.ws.client.loop``). When uvicorn uses uvloop, that
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captured loop is the *main* thread's uvloop — which is already
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running, so ``loop.run_until_complete()`` inside ``Client.start()``
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raises ``RuntimeError``.
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We work around this by creating a plain asyncio event loop for this
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thread and patching the SDK's module-level reference before calling
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``start()``.
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"""
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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try:
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import lark_oapi as lark
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import lark_oapi.ws.client as _ws_client_mod
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# Replace the SDK's module-level loop so Client.start() uses
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# this thread's (non-running) event loop instead of the main
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# thread's uvloop.
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_ws_client_mod.loop = loop
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event_handler = lark.EventDispatcherHandler.builder("", "").register_p2_im_message_receive_v1(self._on_message).build()
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ws_client = lark.ws.Client(
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app_id=app_id,
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app_secret=app_secret,
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event_handler=event_handler,
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log_level=lark.LogLevel.INFO,
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)
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ws_client.start()
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except Exception:
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if self._running:
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logger.exception("Feishu WebSocket error")
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async def stop(self) -> None:
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self._running = False
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self.bus.unsubscribe_outbound(self._on_outbound)
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if self._thread:
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self._thread.join(timeout=5)
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self._thread = None
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logger.info("Feishu channel stopped")
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async def send(self, msg: OutboundMessage, *, _max_retries: int = 3) -> None:
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if not self._api_client:
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logger.warning("[Feishu] send called but no api_client available")
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return
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logger.info(
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"[Feishu] sending reply: chat_id=%s, thread_ts=%s, text_len=%d",
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msg.chat_id,
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msg.thread_ts,
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len(msg.text),
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)
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content = self._build_card_content(msg.text)
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last_exc: Exception | None = None
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for attempt in range(_max_retries):
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try:
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if msg.thread_ts:
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# Reply in thread (话题)
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request = self._ReplyMessageRequest.builder().message_id(msg.thread_ts).request_body(self._ReplyMessageRequestBody.builder().msg_type("interactive").content(content).reply_in_thread(True).build()).build()
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await asyncio.to_thread(self._api_client.im.v1.message.reply, request)
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else:
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# Send new message
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request = self._CreateMessageRequest.builder().receive_id_type("chat_id").request_body(self._CreateMessageRequestBody.builder().receive_id(msg.chat_id).msg_type("interactive").content(content).build()).build()
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await asyncio.to_thread(self._api_client.im.v1.message.create, request)
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# Add "DONE" reaction to the original message on final reply
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if msg.is_final and msg.thread_ts:
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await self._add_reaction(msg.thread_ts, "DONE")
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return # success
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except Exception as exc:
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last_exc = exc
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if attempt < _max_retries - 1:
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delay = 2**attempt # 1s, 2s
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logger.warning(
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"[Feishu] send failed (attempt %d/%d), retrying in %ds: %s",
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attempt + 1,
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_max_retries,
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delay,
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exc,
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)
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await asyncio.sleep(delay)
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logger.error("[Feishu] send failed after %d attempts: %s", _max_retries, last_exc)
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raise last_exc # type: ignore[misc]
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# -- message formatting ------------------------------------------------
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@staticmethod
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def _build_card_content(text: str) -> str:
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"""Build a Feishu interactive card with markdown content.
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Feishu's interactive card format natively renders markdown, including
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headers, bold/italic, code blocks, lists, and links.
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"""
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card = {
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"config": {"wide_screen_mode": True},
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"elements": [{"tag": "markdown", "content": text}],
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}
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return json.dumps(card)
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# -- reaction helpers --------------------------------------------------
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async def _add_reaction(self, message_id: str, emoji_type: str = "THUMBSUP") -> None:
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"""Add an emoji reaction to a message."""
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if not self._api_client or not self._CreateMessageReactionRequest:
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return
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try:
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request = self._CreateMessageReactionRequest.builder().message_id(message_id).request_body(self._CreateMessageReactionRequestBody.builder().reaction_type(self._Emoji.builder().emoji_type(emoji_type).build()).build()).build()
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await asyncio.to_thread(self._api_client.im.v1.message_reaction.create, request)
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logger.info("[Feishu] reaction '%s' added to message %s", emoji_type, message_id)
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except Exception:
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logger.exception("[Feishu] failed to add reaction '%s' to message %s", emoji_type, message_id)
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async def _send_running_reply(self, message_id: str) -> None:
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"""Reply to a message in-thread with a 'Working on it...' hint."""
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if not self._api_client:
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return
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try:
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content = self._build_card_content("Working on it...")
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request = self._ReplyMessageRequest.builder().message_id(message_id).request_body(self._ReplyMessageRequestBody.builder().msg_type("interactive").content(content).reply_in_thread(True).build()).build()
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await asyncio.to_thread(self._api_client.im.v1.message.reply, request)
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logger.info("[Feishu] 'Working on it......' reply sent for message %s", message_id)
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except Exception:
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logger.exception("[Feishu] failed to send running reply for message %s", message_id)
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# -- internal ----------------------------------------------------------
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@staticmethod
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def _log_future_error(fut, name: str, msg_id: str) -> None:
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"""Callback for run_coroutine_threadsafe futures to surface errors."""
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try:
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exc = fut.exception()
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if exc:
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logger.error("[Feishu] %s failed for msg_id=%s: %s", name, msg_id, exc)
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except Exception:
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pass
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def _on_message(self, event) -> None:
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"""Called by lark-oapi when a message is received (runs in lark thread)."""
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try:
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logger.info("[Feishu] raw event received: type=%s", type(event).__name__)
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message = event.event.message
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chat_id = message.chat_id
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msg_id = message.message_id
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sender_id = event.event.sender.sender_id.open_id
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# root_id is set when the message is a reply within a Feishu thread.
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# Use it as topic_id so all replies share the same DeerFlow thread.
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root_id = getattr(message, "root_id", None) or None
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# Parse message content
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content = json.loads(message.content)
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text = content.get("text", "").strip()
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logger.info(
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"[Feishu] parsed message: chat_id=%s, msg_id=%s, root_id=%s, sender=%s, text=%r",
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chat_id,
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msg_id,
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root_id,
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sender_id,
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text[:100] if text else "",
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)
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if not text:
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logger.info("[Feishu] empty text, ignoring message")
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return
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# Check if it's a command
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if text.startswith("/"):
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msg_type = InboundMessageType.COMMAND
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else:
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msg_type = InboundMessageType.CHAT
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# topic_id: use root_id for replies (same topic), msg_id for new messages (new topic)
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topic_id = root_id or msg_id
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inbound = self._make_inbound(
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chat_id=chat_id,
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user_id=sender_id,
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text=text,
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msg_type=msg_type,
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thread_ts=msg_id,
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metadata={"message_id": msg_id, "root_id": root_id},
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)
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inbound.topic_id = topic_id
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# Schedule on the async event loop
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if self._main_loop and self._main_loop.is_running():
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logger.info("[Feishu] publishing inbound message to bus (type=%s, msg_id=%s)", msg_type.value, msg_id)
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# Schedule all coroutines and attach error logging to futures
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for name, coro in [
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("add_reaction", self._add_reaction(msg_id, "OK")),
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("send_running_reply", self._send_running_reply(msg_id)),
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("publish_inbound", self.bus.publish_inbound(inbound)),
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]:
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fut = asyncio.run_coroutine_threadsafe(coro, self._main_loop)
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fut.add_done_callback(lambda f, n=name, mid=msg_id: self._log_future_error(f, n, mid))
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else:
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logger.warning("[Feishu] main loop not running, cannot publish inbound message")
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except Exception:
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logger.exception("[Feishu] error processing message")
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