52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
from aiohttp import web, WSMsgType
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from typing import Dict, Set
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import asyncio
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import json
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from .util import wrap_async
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from ..web_agent import WebAgent
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class TokenWebSocket:
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"""
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WebSocket handler for LLM token streaming.
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Broadcasts new tokens to all connected clients.
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"""
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def __init__(self, agent: WebAgent):
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self._agent = agent
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self._clients: Set[web.WebSocketResponse] = set()
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self._agent.add_token_handler(wrap_async(self._handle_new_token))
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async def _broadcast_message(self, message: Dict):
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"""Broadcast message to all connected clients."""
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disconnected = set()
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for ws in self._clients:
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try:
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await ws.send_json(message)
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except ConnectionResetError:
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disconnected.add(ws)
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self._clients -= disconnected
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async def _handle_new_token(self, llm_name: str, token: str):
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"""Handle new tokens from the WebAgent."""
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await self._broadcast_message({
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"llm": llm_name,
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"token": token
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})
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async def handle_connection(self, request: web.Request) -> web.WebSocketResponse:
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"""Handle new WebSocket connections."""
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ws = web.WebSocketResponse(heartbeat=30)
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await ws.prepare(request)
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self._clients.add(ws)
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try:
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async for msg in ws:
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if msg.type == WSMsgType.ERROR:
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print(f"WebSocket connection closed with error: {ws.exception()}")
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finally:
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self._clients.remove(ws)
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return ws
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