File size: 2,553 Bytes
273a850 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | from fastapi import WebSocket, WebSocketDisconnect
from typing import AsyncGenerator
import asyncio
from app.utils.logger import logger
from app.services.bedrock_streaming import bedrock
from app.services.dynamodb import db
from app.services.redis_cache import cache
class WebSocketHandler:
def __init__(self):
self.active_connections = {}
async def handle_audio_stream(self, websocket: WebSocket, session_id: str):
"""Handle bidirectional audio streaming"""
await websocket.accept()
logger.info("WebSocket connected", session_id=session_id)
# Mark session as active
cache.set(f"session_active:{session_id}", True, 600)
try:
# Create async generator for audio input
async def audio_input_stream() -> AsyncGenerator[bytes, None]:
while True:
try:
# Receive audio from client
data = await websocket.receive()
if 'bytes' in data:
yield data['bytes']
elif 'text' in data:
# Handle control messages
import json
control = json.loads(data['text'])
if control.get('type') == 'end':
break
except WebSocketDisconnect:
break
except Exception as e:
logger.error("Audio receive error", session_id=session_id, error=str(e))
break
# Start bidirectional streaming with Bedrock
await bedrock.stream_conversation(
session_id=session_id,
audio_input_stream=audio_input_stream(),
websocket=websocket
)
except WebSocketDisconnect:
logger.info("Client disconnected", session_id=session_id)
except Exception as e:
logger.error("WebSocket error", session_id=session_id, error=str(e))
await websocket.send_json({
"type": "error",
"message": str(e)
})
finally:
# Update session state
db.update_session_state(session_id, "ended")
cache.delete(f"session_active:{session_id}")
logger.info("Session ended", session_id=session_id)
ws_handler = WebSocketHandler()
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