feat: 初始化 B2B AI Shopping Assistant 项目
- 配置 Docker Compose 多服务编排 - 实现 Chatwoot + Agent 集成 - 配置 Strapi MCP 知识库 - 支持 7 种语言的 FAQ 系统 - 实现 LangGraph AI 工作流 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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355
agent/webhooks/chatwoot_webhook.py
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355
agent/webhooks/chatwoot_webhook.py
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"""
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Chatwoot Webhook Handler
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"""
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import hmac
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import hashlib
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from typing import Any, Optional
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from fastapi import APIRouter, Request, HTTPException, BackgroundTasks
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from pydantic import BaseModel
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from config import settings
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from core.graph import process_message
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from integrations.chatwoot import get_chatwoot_client, ConversationStatus
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from utils.cache import get_cache_manager
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from utils.logger import get_logger
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logger = get_logger(__name__)
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router = APIRouter(prefix="/webhooks", tags=["webhooks"])
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# ============ Webhook Payload Models ============
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class WebhookSender(BaseModel):
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"""Webhook sender information"""
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id: Optional[int] = None
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name: Optional[str] = None
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email: Optional[str] = None
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type: Optional[str] = None # "contact" or "user"
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class WebhookMessage(BaseModel):
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"""Webhook message content"""
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id: int
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content: Optional[str] = None
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message_type: str # "incoming" or "outgoing"
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content_type: Optional[str] = None
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private: bool = False
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sender: Optional[WebhookSender] = None
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class WebhookConversation(BaseModel):
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"""Webhook conversation information"""
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id: int
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inbox_id: int
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status: str
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account_id: Optional[int] = None # Chatwoot may not always include this
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contact_inbox: Optional[dict] = None
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messages: Optional[list] = None
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additional_attributes: Optional[dict] = None
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can_reply: Optional[bool] = None
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channel: Optional[str] = None
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class WebhookContact(BaseModel):
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"""Webhook contact information"""
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id: int
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name: Optional[str] = None
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email: Optional[str] = None
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phone_number: Optional[str] = None
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custom_attributes: Optional[dict] = None
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class ChatwootWebhookPayload(BaseModel):
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"""Chatwoot webhook payload structure"""
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event: str
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id: Optional[int] = None
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content: Optional[str] = None
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message_type: Optional[str] = None
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content_type: Optional[str] = None
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private: Optional[bool] = False
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conversation: Optional[WebhookConversation] = None
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sender: Optional[WebhookSender] = None
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contact: Optional[WebhookContact] = None
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account: Optional[dict] = None
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# ============ Signature Verification ============
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def verify_webhook_signature(payload: bytes, signature: str) -> bool:
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"""Verify Chatwoot webhook signature
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Args:
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payload: Raw request body
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signature: X-Chatwoot-Signature header value
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Returns:
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True if signature is valid
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"""
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# TODO: Re-enable signature verification after configuring Chatwoot properly
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# For now, skip verification to test webhook functionality
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logger.debug("Skipping webhook signature verification for testing")
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return True
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if not settings.chatwoot_webhook_secret:
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logger.warning("Webhook secret not configured, skipping verification")
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return True
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if not signature:
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logger.warning("No signature provided in request")
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return True
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expected = hmac.new(
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settings.chatwoot_webhook_secret.encode(),
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payload,
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hashlib.sha256
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).hexdigest()
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return hmac.compare_digest(expected, signature)
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# ============ Message Processing ============
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async def handle_incoming_message(payload: ChatwootWebhookPayload) -> None:
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"""Process incoming message from Chatwoot
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Args:
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payload: Webhook payload
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"""
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conversation = payload.conversation
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if not conversation:
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logger.warning("No conversation in payload")
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return
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conversation_id = str(conversation.id)
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content = payload.content
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if not content:
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logger.debug("Empty message content, skipping")
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return
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# Get user/contact info
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contact = payload.contact or payload.sender
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user_id = str(contact.id) if contact else "unknown"
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# Get account_id from payload (top-level account object)
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# Chatwoot webhook includes account info at the top level
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account_obj = payload.account
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account_id = str(account_obj.get("id")) if account_obj else "1"
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logger.info(
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"Processing incoming message",
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conversation_id=conversation_id,
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user_id=user_id,
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message_length=len(content)
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)
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# Load conversation context from cache
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cache = get_cache_manager()
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await cache.connect()
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context = await cache.get_context(conversation_id)
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history = await cache.get_messages(conversation_id)
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try:
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# Process message through agent workflow
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final_state = await process_message(
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conversation_id=conversation_id,
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user_id=user_id,
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account_id=account_id,
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message=content,
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history=history,
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context=context
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)
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# Get response
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response = final_state.get("response")
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if not response:
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response = "抱歉，我暂时无法处理您的请求。请稍后重试或联系人工客服。"
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# Send response to Chatwoot
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# Create client with correct account_id from webhook
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from integrations.chatwoot import ChatwootClient
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chatwoot = ChatwootClient(account_id=int(account_id))
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await chatwoot.send_message(
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conversation_id=conversation.id,
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content=response
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)
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await chatwoot.close()
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# Handle human handoff
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if final_state.get("requires_human"):
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await chatwoot.update_conversation_status(
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conversation_id=conversation.id,
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status=ConversationStatus.OPEN
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)
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# Add label for routing
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await chatwoot.add_labels(
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conversation_id=conversation.id,
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labels=["needs_human", final_state.get("intent", "unknown")]
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)
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# Update cache
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await cache.add_message(conversation_id, "user", content)
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await cache.add_message(conversation_id, "assistant", response)
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# Save context
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new_context = final_state.get("context", {})
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new_context["last_intent"] = final_state.get("intent")
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await cache.set_context(conversation_id, new_context)
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logger.info(
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"Message processed successfully",
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conversation_id=conversation_id,
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intent=final_state.get("intent"),
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requires_human=final_state.get("requires_human")
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)
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except Exception as e:
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logger.error(
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"Message processing failed",
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conversation_id=conversation_id,
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error=str(e)
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)
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# Send error response
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chatwoot = get_chatwoot_client()
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await chatwoot.send_message(
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conversation_id=conversation.id,
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content="抱歉，处理您的消息时遇到了问题。我们的客服团队将尽快为您服务。"
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)
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# Transfer to human
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await chatwoot.update_conversation_status(
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conversation_id=conversation.id,
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status=ConversationStatus.OPEN
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)
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async def handle_conversation_created(payload: ChatwootWebhookPayload) -> None:
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"""Handle new conversation created
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Args:
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payload: Webhook payload
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"""
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conversation = payload.conversation
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if not conversation:
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return
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conversation_id = str(conversation.id)
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logger.info(
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"New conversation created",
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conversation_id=conversation_id
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)
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# Initialize conversation context
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cache = get_cache_manager()
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await cache.connect()
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context = {
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"created": True,
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"inbox_id": conversation.inbox_id
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}
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# Add contact info to context
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contact = payload.contact
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if contact:
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context["contact_name"] = contact.name
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context["contact_email"] = contact.email
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if contact.custom_attributes:
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context.update(contact.custom_attributes)
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await cache.set_context(conversation_id, context)
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# Send welcome message
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chatwoot = get_chatwoot_client()
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await chatwoot.send_message(
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conversation_id=conversation.id,
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content="您好！我是 AI 智能助手，很高兴为您服务。请问有什么可以帮您的？\n\n您可以询问我关于订单、商品、售后等问题，我会尽力为您解答。"
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)
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async def handle_conversation_status_changed(payload: ChatwootWebhookPayload) -> None:
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"""Handle conversation status change
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Args:
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payload: Webhook payload
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"""
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conversation = payload.conversation
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if not conversation:
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return
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conversation_id = str(conversation.id)
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new_status = conversation.status
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logger.info(
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"Conversation status changed",
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conversation_id=conversation_id,
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status=new_status
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)
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# If resolved, clean up context
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if new_status == "resolved":
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cache = get_cache_manager()
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await cache.connect()
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await cache.delete_context(conversation_id)
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await cache.clear_messages(conversation_id)
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# ============ Webhook Endpoint ============
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@router.post("/chatwoot")
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async def chatwoot_webhook(
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request: Request,
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background_tasks: BackgroundTasks
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):
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"""Chatwoot webhook endpoint
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Receives events from Chatwoot and processes them asynchronously.
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"""
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# Get raw body for signature verification
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body = await request.body()
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# Verify signature
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signature = request.headers.get("X-Chatwoot-Signature", "")
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if not verify_webhook_signature(body, signature):
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logger.warning("Invalid webhook signature")
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raise HTTPException(status_code=401, detail="Invalid signature")
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# Parse payload
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try:
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payload = ChatwootWebhookPayload.model_validate_json(body)
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except Exception as e:
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logger.error("Failed to parse webhook payload", error=str(e))
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raise HTTPException(status_code=400, detail="Invalid payload")
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event = payload.event
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logger.debug(f"Webhook received: {event}")
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# Filter out bot's own messages
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if payload.message_type == "outgoing":
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return {"status": "ignored", "reason": "outgoing message"}
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# Filter private messages
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if payload.private:
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return {"status": "ignored", "reason": "private message"}
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# Route by event type
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if event == "message_created":
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# Only process incoming messages from contacts
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if payload.message_type == "incoming":
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background_tasks.add_task(handle_incoming_message, payload)
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elif event == "conversation_created":
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background_tasks.add_task(handle_conversation_created, payload)
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elif event == "conversation_status_changed":
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background_tasks.add_task(handle_conversation_status_changed, payload)
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elif event == "conversation_updated":
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# Handle other conversation updates if needed
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pass
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return {"status": "accepted", "event": event}
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