Feishu (Lark) Interactive Message Cards & Callback Data Handling
Decrypting gateway/platforms/lark.py Challenge verification and card component dynamic redrawing
📊 Figure 5-3-1: Multi-tenant gateway distribution, multi-channel adapter bus, and standard message send/receive flow
🤝 1. URL Challenge Handshake & Encryption Verification
When integrating with the Feishu server, the system implements standard Challenge authentication in gateway/platforms/lark.py:
# Feishu gateway challenge self-healing response
if payload.get("type") == "url_verification":
return {"challenge": payload.get("challenge")}In compliance with Feishu Open Platform security requirements, AES-256 keys are used to decrypt input parameters, preventing eavesdropping.
📊 Figure 5-3-2: Card component progress update, Feishu downstream edit card, and progress merge flow
🎨 2. Feishu Dynamic Message Card Interaction
When the LLM sends progress updates, the adapter converts the progress bar into Feishu-specific Card JSON payload, dynamically modifying Feishu card components to achieve in-place interaction, greatly enhancing UI quality.