import json
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from fastapi import WebSocket, WebSocketDisconnect, APIRouter, Depends, HTTPException, Query
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import asyncio
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import websockets
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from sqlalchemy.orm import Session
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from app.api import get_current_user_websocket, ResponseList, get_current_user, format_file_url, process_files
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from app.config.config import settings
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from app.models.agent_model import AgentModel, AgentType
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from app.models.base_model import get_db
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from app.models.user_model import UserModel
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from app.service.bisheng import BishengService
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from app.service.service_token import get_bisheng_token
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router = APIRouter()
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@router.websocket("/ws/{agent_id}/{chat_id}")
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async def report_chat(websocket: WebSocket,
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agent_id: str,
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chat_id: str,
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current_user: UserModel = Depends(get_current_user_websocket),
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db: Session = Depends(get_db)):
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agent = db.query(AgentModel).filter(AgentModel.id == agent_id).first()
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if not agent:
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ret = {"message": "Agent not found", "type": "close"}
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return websocket.send_json(ret)
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agent_type = agent.agent_type
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if chat_id == "" or chat_id == "0":
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ret = {"message": "Chat ID not found", "type": "close"}
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return websocket.send_json(ret)
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if agent_type != AgentType.BISHENG:
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ret = {"message": "Agent error", "type": "close"}
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return websocket.send_json(ret)
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token = get_bisheng_token(db, current_user.id)
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service_uri = f"{settings.sgb_websocket_url}/api/v1/chat/{agent_id}?type=L1&t=&chat_id={chat_id}"
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headers = {'cookie': f"access_token_cookie={token};"}
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await websocket.accept()
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print(f"Client {agent_id} connected")
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async with websockets.connect(service_uri, extra_headers=headers) as service_websocket:
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try:
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# 处理客户端发来的消息
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async def forward_to_service():
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while True:
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message = await websocket.receive_json()
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print(f"Received from client, {chat_id}: {message}")
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# 添加 'agent_id' 和 'chat_id' 字段
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message['flow_id'] = agent_id
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message['chat_id'] = chat_id
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await service_websocket.send(json.dumps(message))
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print(f"Forwarded to bisheng: {message}")
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# 监听毕昇发来的消息并转发给客户端
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async def forward_to_client():
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last_message = "step"
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while True:
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message = await service_websocket.recv()
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print(f"Received from bisheng: {message}")
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data = json.loads(message)
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files = data.get("files", [])
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steps = data.get("intermediate_steps", "")
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msg = data.get("message", "")
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category = data.get("category", "")
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if len(files) != 0 or (msg and category != "answer") or data["type"] == "close":
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if data["type"] == "close":
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t = "close"
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else:
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t = "stream"
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process_files(files, agent_id)
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result = {"message": msg, "type": t, "files": files}
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await websocket.send_json(result)
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elif steps and last_message == "step":
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result = {"step_message": steps, "type": "stream", "files": files}
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await websocket.send_json(result)
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last_message = "message" if msg else "step"
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# 启动两个任务，分别处理客户端和服务端的消息
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tasks = [
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asyncio.create_task(forward_to_service()),
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asyncio.create_task(forward_to_client())
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]
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done, pending = await asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)
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# 取消未完成的任务
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for task in pending:
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task.cancel()
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try:
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await task
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except asyncio.CancelledError as e:
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print(f"asyncio CancelledError: {e}")
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pass
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except WebSocketDisconnect as e:
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print(f"WebSocket connection closed with code {e.code}: {e.reason}")
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await websocket.close()
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await service_websocket.close()
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except Exception as e:
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print(f"Exception occurred: {e}")
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finally:
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print("Cleaning up resources of bisheng report")
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# 取消所有任务
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for task in tasks:
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if not task.done():
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task.cancel()
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try:
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await task
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except asyncio.CancelledError:
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pass
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@router.get("/variables/list", response_model=ResponseList)
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async def get_variables(agent_id: str = Query(..., description="The ID of the agent"), db: Session = Depends(get_db), current_user: UserModel = Depends(get_current_user)):
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agent = db.query(AgentModel).filter(AgentModel.id == agent_id).first()
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if not agent:
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return ResponseList(code=404, msg="Agent not found")
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bisheng_service = BishengService(base_url=settings.sgb_base_url)
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try:
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token = get_bisheng_token(db, current_user.id)
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result = await bisheng_service.variable_list(token, agent_id)
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except Exception as e:
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raise HTTPException(status_code=500, detail=str(e))
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return ResponseList(code=200, msg="", data=result)
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