103 lines
3.7 KiB
Python
103 lines
3.7 KiB
Python
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import json
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import logging
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from fastapi import APIRouter, WebSocket, WebSocketDisconnect
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from app.main import async_session
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from app.models.database import ConversationSource, ConversationStatus
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from app.services.conversation import ConversationManager
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logger = logging.getLogger(__name__)
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router = APIRouter()
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@router.websocket("/ws/chat")
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async def ws_chat(websocket: WebSocket):
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await websocket.accept()
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session_id = None
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try:
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async with async_session() as db:
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manager = ConversationManager(db)
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# Collect client info
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client_ip = websocket.client.host if websocket.client else ""
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forwarded = websocket.headers.get("x-forwarded-for", "")
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if forwarded:
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client_ip = forwarded.split(",")[0].strip()
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user_agent = websocket.headers.get("user-agent", "")
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client_info = {"ip": client_ip, "user_agent": user_agent}
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# First message: init or resume
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init_data = await websocket.receive_text()
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init_msg = json.loads(init_data)
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if "session_id" in init_msg:
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conv = await manager.get_by_session(init_msg["session_id"])
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if conv and conv.status == ConversationStatus.active:
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session_id = conv.session_id
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await websocket.send_text(json.dumps({
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"type": "resumed",
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"session_id": session_id,
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}))
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else:
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session_id = None
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# page_token: reuse active conversation from same page session
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if not session_id and "page_token" in init_msg and init_msg["page_token"]:
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conv = await manager.get_by_page_token(init_msg["page_token"])
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if conv:
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session_id = conv.session_id
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await websocket.send_text(json.dumps({
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"type": "resumed",
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"session_id": session_id,
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}))
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if not session_id:
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source = ConversationSource(
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init_msg.get("source", "standalone")
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)
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merged_info = {**client_info, **(init_msg.get("client_info") or {})}
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conv = await manager.create_conversation(
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source=source,
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client_info=merged_info,
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page_token=init_msg.get("page_token"),
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)
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session_id = conv.session_id
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await websocket.send_text(json.dumps({
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"type": "init",
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"session_id": session_id,
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}))
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# Chat loop
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while True:
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data = await websocket.receive_text()
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msg = json.loads(data)
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content = msg.get("content", "").strip()
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if not content:
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continue
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ended = False
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async for event in manager.stream_process_message(session_id, content):
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if event["type"] == "error":
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await websocket.send_text(json.dumps({
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"type": "error",
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"message": event["message"],
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}))
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break
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await websocket.send_text(json.dumps(event, ensure_ascii=False))
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if event["type"] == "evaluated" and event.get("ended"):
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ended = True
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break
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if ended:
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break
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except WebSocketDisconnect:
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logger.info("Client disconnected: %s", session_id)
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except Exception:
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logger.exception("WebSocket error for session %s", session_id)
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