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"""WebSocket endpoint handler."""
from __future__ import annotations
import asyncio
import logging
from typing import Any
from fastapi import APIRouter, WebSocket, WebSocketDisconnect
from uipath.dev.models.chat import get_user_message, get_user_message_event
from uipath.dev.models.data import ChatData
from uipath.dev.server.ws.protocol import (
ClientCommand,
ServerEvent,
parse_client_message,
server_message,
)
router = APIRouter()
logger = logging.getLogger(__name__)
@router.websocket("/ws")
async def websocket_endpoint(websocket: WebSocket) -> None:
"""Handle WebSocket connections for real-time event streaming."""
server = websocket.app.state.server
manager = server.connection_manager
await manager.connect(websocket)
# If a reload is pending (file changed before this client connected), notify immediately
if server.reload_pending:
await websocket.send_json(server_message(ServerEvent.RELOAD, {"files": []}))
try:
while True:
data: dict[str, Any] = await websocket.receive_json()
command, payload = parse_client_message(data)
if command == ClientCommand.SUBSCRIBE.value:
run_id = payload.get("run_id", "")
if run_id:
manager.subscribe(websocket, run_id)
logger.debug(f"Client subscribed to run {run_id}")
elif command == ClientCommand.UNSUBSCRIBE.value:
run_id = payload.get("run_id", "")
if run_id:
manager.unsubscribe(websocket, run_id)
logger.debug(f"Client unsubscribed from run {run_id}")
elif command == ClientCommand.CHAT_MESSAGE.value:
run_id = payload.get("run_id", "")
text = payload.get("text", "")
if run_id and text:
await _handle_chat_message(server, run_id, text)
elif command == ClientCommand.CHAT_INTERRUPT_RESPONSE.value:
run_id = payload.get("run_id", "")
data = payload.get("data", {})
if run_id:
_handle_interrupt_response(server, run_id, data)
elif command == ClientCommand.DEBUG_STEP.value:
run_id = payload.get("run_id", "")
if run_id:
run = server.run_service.get_run(run_id)
if run:
server.run_service.step_debug(run)
elif command == ClientCommand.DEBUG_CONTINUE.value:
run_id = payload.get("run_id", "")
if run_id:
run = server.run_service.get_run(run_id)
if run:
server.run_service.continue_debug(run)
elif command == ClientCommand.DEBUG_STOP.value:
run_id = payload.get("run_id", "")
if run_id:
run = server.run_service.get_run(run_id)
if run:
server.run_service.stop_debug(run)
elif command == ClientCommand.DEBUG_SET_BREAKPOINTS.value:
run_id = payload.get("run_id", "")
breakpoints = payload.get("breakpoints", [])
if run_id:
run = server.run_service.get_run(run_id)
if run:
server.run_service.set_breakpoints(run, breakpoints)
except WebSocketDisconnect:
manager.disconnect(websocket)
except Exception:
logger.exception("WebSocket error")
manager.disconnect(websocket)
def _handle_interrupt_response(server: Any, run_id: str, data: Any) -> None:
"""Process an interrupt response from a WebSocket client."""
run = server.run_service.get_run(run_id)
if run is None or run.status != "suspended":
return
chat_bridge = server.run_service.get_chat_bridge(run_id)
if chat_bridge:
server.run_service.resume_chat(run, data if isinstance(data, dict) else {})
async def _handle_chat_message(server: Any, run_id: str, text: str) -> None:
"""Process an incoming chat message from a WebSocket client."""
run = server.run_service.get_run(run_id)
if run is None:
return
if run.status == "running":
return # Ignore while processing
if run.status == "suspended":
# If there's an active chat bridge, ignore regular chat messages
# (user should respond via interrupt response)
chat_bridge = server.run_service.get_chat_bridge(run_id)
if chat_bridge:
return
# Try JSON parse for resume data
import json
try:
run.resume_data = json.loads(text)
except json.JSONDecodeError:
run.resume_data = text
debug_bridge = server.run_service.get_debug_bridge(run.id)
if debug_bridge:
asyncio.create_task(server.run_service.resume_debug(run, run.resume_data))
else:
asyncio.create_task(server.run_service.execute(run))
else:
# Regular chat message
msg = get_user_message(text)
msg_ev = get_user_message_event(text)
chat_data = ChatData(event=msg_ev, message=msg, run_id=run.id)
server._on_chat(chat_data)
run.add_event(msg_ev)
run.input_data = {"messages": [msg.model_dump(by_alias=True)]}
asyncio.create_task(server.run_service.execute(run))