128 lines
3.6 KiB
Python
128 lines
3.6 KiB
Python
"""
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对话API路由
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"""
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from fastapi import APIRouter, HTTPException
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from fastapi.responses import StreamingResponse
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from typing import Optional
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import uuid
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import json
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import asyncio
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from app.models.chat import ChatRequest, ChatResponse
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from app.agent.smart_agent import smart_agent # 使用智能Agent
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from app.utils.logger import logger
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router = APIRouter()
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@router.post("/message", response_model=ChatResponse)
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async def send_message(request: ChatRequest):
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"""
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发送消息给Agent
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Args:
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request: 聊天请求
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Returns:
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Agent响应
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"""
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try:
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# 生成或使用现有session_id
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session_id = request.session_id or str(uuid.uuid4())
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# 处理消息（使用智能Agent）
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response = await smart_agent.process_message(
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message=request.message,
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session_id=session_id,
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user_id=request.user_id
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)
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return ChatResponse(
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message=response["message"],
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session_id=session_id,
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metadata=response.get("metadata")
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)
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except Exception as e:
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logger.error(f"处理消息失败: {e}")
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raise HTTPException(status_code=500, detail=str(e))
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@router.get("/history/{session_id}")
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async def get_history(session_id: str, limit: int = 50):
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"""
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获取对话历史
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Args:
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session_id: 会话ID
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limit: 最大消息数
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Returns:
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对话历史
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"""
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try:
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context = smart_agent.context_manager.get_context(session_id)
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return {
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"session_id": session_id,
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"messages": context
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}
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except Exception as e:
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logger.error(f"获取历史失败: {e}")
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raise HTTPException(status_code=500, detail=str(e))
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@router.post("/message/stream")
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async def send_message_stream(request: ChatRequest):
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"""
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流式发送消息给Agent
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Args:
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request: 聊天请求
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Returns:
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Server-Sent Events 流式响应
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"""
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try:
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# 生成或使用现有session_id
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session_id = request.session_id or str(uuid.uuid4())
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async def event_generator():
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"""生成SSE事件流"""
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try:
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# 发送session_id
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yield f"data: {json.dumps({'type': 'session_id', 'session_id': session_id})}\n\n"
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# 添加小延迟确保数据被发送
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await asyncio.sleep(0.01)
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# 处理消息并流式返回
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async for chunk in smart_agent.process_message_stream(
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message=request.message,
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session_id=session_id,
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user_id=request.user_id
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):
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yield f"data: {json.dumps({'type': 'content', 'content': chunk})}\n\n"
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# 添加小延迟，让浏览器有机会接收数据
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await asyncio.sleep(0.001)
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# 发送完成信号
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yield f"data: {json.dumps({'type': 'done'})}\n\n"
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except Exception as e:
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logger.error(f"流式处理消息失败: {e}")
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yield f"data: {json.dumps({'type': 'error', 'error': str(e)})}\n\n"
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return StreamingResponse(
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event_generator(),
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media_type="text/event-stream",
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headers={
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"Cache-Control": "no-cache",
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"Connection": "keep-alive",
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"X-Accel-Buffering": "no",
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"Transfer-Encoding": "chunked"
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}
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)
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except Exception as e:
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logger.error(f"创建流式响应失败: {e}")
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raise HTTPException(status_code=500, detail=str(e))
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