lark-bridge 0.2.0

Unofficial Feishu/Lark Web SDK - WebSocket listener, message search, send, and drive operations

lark-bridge

Unofficial Feishu/Lark Web SDK using cookie-based authentication. Provides real-time message listening via WebSocket, message search/fetch, sending, and Drive operations.

⚠️ This library is reverse-engineered from Feishu's web client. It is not an official API and may break without notice.

Installation

pip install lark-bridge

Quick Start

import asyncio
from lark_bridge import LarkBridge

bridge = LarkBridge("your_cookie_string_here")

# For enterprise tenants with custom domain:
bridge = LarkBridge("your_cookie_string_here", domain="yourcompany.feishu.cn")

Listen to Messages

async def main():
    async for msg in bridge.listen(watch_chats=["chat_id"]):
        print(f"[{msg['chat_id']}] {msg['from_id']}: {msg['text']}")

asyncio.run(main())

Search History

# Simple: auto-paginate up to limit
result = await bridge.search_messages(
    chat_id="7052636707732193282",
    start_time=1716192000,
    end_time=1716278400,
    limit=50,
)
print(result["msg_ids"])

# Manual pagination:
page = await bridge.search_messages_page(chat_id="7052636707732193282")
while page["has_more"]:
    page = await bridge.search_messages_page(
        chat_id="7052636707732193282",
        page_token=page["page_token"],
    )
    print(page["msg_ids"])

Fetch Messages

messages = await bridge.fetch_messages(["msg_id_1", "msg_id_2"])
for msg in messages:
    print(msg["text"])

Send Message

await bridge.send_message(
    chat_id="7052636707732193282",
    text="Hello!",
    reply_id="optional_msg_id",
    at_user_ids=["user_id"],
)

Drive Operations

folder = await bridge.create_folder("My Folder", parent_token="root_token")
result = await bridge.upload_file(folder["token"], "report.txt", b"file content")

Cookie Setup

1. Open Feishu Web in your browser and log in
2. Open DevTools (F12) → Application → Cookies
3. Copy the full cookie string (all key=value pairs joined by ; )
4. Pass it to LarkBridge("your_cookie_string")

Example cookie format:

cookie = "passport_web_did=YOUR_DID; session=YOUR_SESSION; _csrf_token=YOUR_CSRF_TOKEN"

bridge = LarkBridge(cookie)

Cookie typically stays valid as long as the WebSocket connection is maintained.

License

MIT