""" Queue Worker Module Handles tasks in the request queue """ import asyncio import time from asyncio import Event, Future, Task from typing import Callable, Optional, cast from fastapi import HTTPException, Request from playwright.async_api import Locator from playwright.async_api import expect as expect_async from api_utils.context_types import QueueItem from models import QuotaExceededError from .client_connection import check_client_connection async def queue_worker() -> None: """Queue worker, processes tasks in the request queue""" # Delayed imports to avoid circularity from api_utils.server_state import state from config import RESPONSE_COMPLETION_TIMEOUT logger = state.logger request_queue = state.request_queue processing_lock = state.processing_lock model_switching_lock = state.model_switching_lock params_cache_lock = state.params_cache_lock from browser_utils.auth_rotation import perform_auth_rotation from browser_utils.page_controller import PageController from config.global_state import GlobalState from .error_utils import ( client_cancelled, client_disconnected, server_error, ) # Internal imports for queue worker logic from .request_processor import ( ClientDisconnectedError, _process_request_refactored, _test_client_connection, save_error_snapshot, ) from .utils_ext.stream import clear_stream_queue logger.info("--- Queue Worker Started ---") # Validate that required globals are initialized if request_queue is None: logger.critical("FATAL: request_queue is None! Initialization failed.") raise RuntimeError("request_queue not initialized") if processing_lock is None: logger.critical("FATAL: processing_lock is None! Initialization failed.") raise RuntimeError("processing_lock not initialized") if model_switching_lock is None: logger.critical("FATAL: model_switching_lock is None! Initialization failed.") raise RuntimeError("model_switching_lock not initialized") if params_cache_lock is None: logger.critical("FATAL: params_cache_lock is None! Initialization failed.") raise RuntimeError("params_cache_lock not initialized") logger.debug( f"Queue worker initialized with queue={request_queue}, lock={processing_lock}" ) was_last_request_streaming = False last_request_completion_time = 0.0 shutdown_check_interval = 0.1 while True: request_item: Optional[QueueItem] = None result_future: Optional[Future] = None http_request: Optional[Request] = None req_id: str = "UNKNOWN" completion_event: Optional[Event] = None submit_btn_loc: Optional[Locator] = None client_disco_checker: Optional[Callable[[str], bool]] = None disconnect_monitor_task: Optional[Task] = None client_disconnected_early: bool = False try: # [SHUTDOWN] Check shutdown signal if GlobalState.IS_SHUTTING_DOWN.is_set(): logger.info("🚨 Queue Worker detected shutdown signal, exiting.") break # Clean up disconnected requests in queue queue_size = request_queue.qsize() if queue_size > 0: checked_count = 0 items_to_requeue = [] processed_ids = set() while checked_count < queue_size and checked_count < 10: if GlobalState.IS_SHUTTING_DOWN.is_set(): break try: item = request_queue.get_nowait() item_req_id = item.get("req_id", "unknown") if item_req_id in processed_ids: items_to_requeue.append(item) continue processed_ids.add(item_req_id) if not item.get("cancelled", False): item_http_req = item.get("http_request") if item_http_req: try: if not await check_client_connection( item_req_id, item_http_req ): logger.info( f"[{item_req_id}] (Worker Queue Check) Client disconnect detected." ) item["cancelled"] = True item_fut = item.get("result_future") if item_fut and not item_fut.done(): item_fut.set_exception( client_disconnected( item_req_id, "Client disconnected while queued.", ) ) except Exception as e: logger.error( f"[{item_req_id}] (Worker Queue Check) Error: {e}" ) items_to_requeue.append(item) checked_count += 1 except asyncio.QueueEmpty: break for item in items_to_requeue: await request_queue.put(item) # [AUTH-ROTATION] Handle quota or rotation needs if GlobalState.IS_QUOTA_EXCEEDED or GlobalState.NEEDS_ROTATION: reason = ( "Quota Exceeded" if GlobalState.IS_QUOTA_EXCEEDED else "Graceful Rotation Pending" ) logger.info(f"⏸️ Pausing worker for Auth Rotation ({reason})...") GlobalState.start_recovery() try: current_model_id = state.current_ai_studio_model_id rotation_success = await perform_auth_rotation( target_model_id=current_model_id or "" ) if rotation_success: GlobalState.NEEDS_ROTATION = False logger.info("βœ… Auth rotation completed successfully.") else: logger.error("❌ Auth rotation failed.") await asyncio.sleep(1) finally: GlobalState.finish_recovery() if not rotation_success: continue if GlobalState.IS_SHUTTING_DOWN.is_set(): break # Get next request try: current_timeout = ( shutdown_check_interval if GlobalState.IS_SHUTTING_DOWN.is_set() else 5.0 ) request_item = await asyncio.wait_for( request_queue.get(), timeout=current_timeout ) except asyncio.TimeoutError: continue if request_item is None: continue req_id = request_item["req_id"] request_data = request_item["request_data"] http_request = request_item["http_request"] result_future = request_item["result_future"] GlobalState.CURRENT_STREAM_REQ_ID = req_id logger.info(f"[{req_id}] (Worker) Processing request dequeued.") if GlobalState.IS_QUOTA_EXCEEDED: logger.warning(f"[{req_id}] (Worker) β›” Quota exceeded, re-queueing.") await request_queue.put(request_item) request_queue.task_done() continue if request_item.get("cancelled", False): if result_future and not result_future.done(): result_future.set_exception( client_cancelled(req_id, "Request cancelled by user") ) request_queue.task_done() continue is_streaming_request = request_data.stream # Initial connection check if not await _test_client_connection(req_id, http_request): if result_future and not result_future.done(): result_future.set_exception( HTTPException(status_code=499, detail="Client disconnected") ) request_queue.task_done() continue # Streaming delay current_time = time.time() if ( was_last_request_streaming and is_streaming_request and (current_time - last_request_completion_time < 1.0) ): await asyncio.sleep( max(0.5, 1.0 - (current_time - last_request_completion_time)) ) # Wait for lock async with processing_lock: logger.info(f"[{req_id}] (Worker) Lock acquired.") if not await _test_client_connection(req_id, http_request): if result_future and not result_future.done(): result_future.set_exception( HTTPException(status_code=499, detail="Client disconnected") ) elif result_future and result_future.done(): logger.info(f"[{req_id}] (Worker) Future already done.") else: try: returned_value = await _process_request_refactored( req_id, request_data, http_request, result_future ) if ( isinstance(returned_value, tuple) and len(returned_value) == 3 ): completion_event, submit_btn_loc, client_disco_checker = ( returned_value ) if completion_event: if isinstance(completion_event, dict): if ( completion_event.get("done") and is_streaming_request ): if state.STREAM_QUEUE: await state.STREAM_QUEUE.put(completion_event) if result_future and not result_future.done(): result_future.set_result(completion_event) client_disconnected_early = False elif hasattr(completion_event, "wait"): client_disconnected_early = False comp_ev = cast(Event, completion_event) async def enhanced_disconnect_monitor_fn(): nonlocal client_disconnected_early disco_count = 0 while not comp_ev.is_set(): if GlobalState.IS_SHUTTING_DOWN.is_set(): comp_ev.set() break if ( GlobalState.IS_QUOTA_EXCEEDED and not GlobalState.IS_RECOVERING ): # Abort if quota exceeded and not recovering client_disconnected_early = True comp_ev.set() break if not await _test_client_connection( req_id, http_request ): disco_count += 1 if disco_count >= 3: client_disconnected_early = True comp_ev.set() break else: disco_count = 0 await asyncio.sleep(0.2) disconnect_monitor_task = asyncio.create_task( enhanced_disconnect_monitor_fn() ) await asyncio.wait_for( comp_ev.wait(), timeout=RESPONSE_COMPLETION_TIMEOUT / 1000 + 60, ) else: # Non-streaming client_disconnected_early = False res_fut = cast(Future, result_future) async def non_streaming_monitor_fn(): nonlocal client_disconnected_early while not res_fut.done(): if GlobalState.IS_SHUTTING_DOWN.is_set(): res_fut.cancel() break if not await _test_client_connection( req_id, http_request ): client_disconnected_early = True res_fut.set_exception( HTTPException( status_code=499, detail="Client disconnected", ) ) break await asyncio.sleep(0.3) disconnect_monitor_task = asyncio.create_task( non_streaming_monitor_fn() ) await asyncio.wait_for( asyncio.shield(res_fut), timeout=RESPONSE_COMPLETION_TIMEOUT / 1000 + 60, ) # Post-processing button handling if client_disconnected_early: if submit_btn_loc: try: if await submit_btn_loc.is_enabled(timeout=2000): await submit_btn_loc.click( timeout=5000, force=True ) except Exception: pass elif ( submit_btn_loc and client_disco_checker and completion_event ): try: client_disco_checker("Post-stream check") await asyncio.sleep(0.5) client_disco_checker("Post-sleep check") if await submit_btn_loc.is_enabled(timeout=2000): await submit_btn_loc.click(timeout=5000, force=True) await expect_async(submit_btn_loc).to_be_disabled( timeout=10000 ) except ClientDisconnectedError: pass except Exception: await save_error_snapshot(f"button_timeout_{req_id}") except QuotaExceededError: raise except Exception as e: logger.error(f"[{req_id}] (Worker) Error: {e}") if result_future and not result_future.done(): result_future.set_exception( server_error(req_id, f"Error: {e}") ) finally: if ( disconnect_monitor_task and not disconnect_monitor_task.done() ): disconnect_monitor_task.cancel() try: await disconnect_monitor_task except asyncio.CancelledError: pass # [ROTATION] Post-request rotation check just_rotated = False if GlobalState.NEEDS_ROTATION: current_model_id_rot = state.current_ai_studio_model_id if await perform_auth_rotation( target_model_id=current_model_id_rot or "" ): GlobalState.NEEDS_ROTATION = False just_rotated = True # [CLEANUP] try: await clear_stream_queue() # [COOKIE-REFRESH] Save cookies after successful requests if not client_disconnected_early and not GlobalState.IS_QUOTA_EXCEEDED: try: from browser_utils.cookie_refresh import ( maybe_refresh_on_request, ) await maybe_refresh_on_request() except Exception as cookie_err: logger.debug( f"[{req_id}] Cookie refresh error (non-critical): {cookie_err}" ) if ( not GlobalState.IS_QUOTA_EXCEEDED and not just_rotated and not GlobalState.IS_SHUTTING_DOWN.is_set() ): if submit_btn_loc and client_disco_checker: s_page = state.page_instance s_ready = state.is_page_ready s_browser = state.browser_instance if ( s_page and s_ready and s_browser and s_browser.is_connected() ): try: controller = PageController(s_page, logger, req_id) await controller.clear_chat_history(lambda stage: False) except Exception: try: await s_page.reload() except Exception: pass except Exception as e: logger.error(f"[{req_id}] Cleanup error: {e}") was_last_request_streaming = is_streaming_request last_request_completion_time = time.time() except asyncio.CancelledError: if result_future and not result_future.done(): result_future.cancel() break except QuotaExceededError: try: if await _test_client_connection(req_id, http_request): request_queue.put_nowait(request_item) elif result_future and not result_future.done(): result_future.set_exception( HTTPException( status_code=499, detail="Disconnected during quota error" ) ) except Exception: pass except Exception as e: logger.error(f"[{req_id}] Unexpected error: {e}", exc_info=True) if result_future and not result_future.done(): result_future.set_exception(server_error(req_id, f"Error: {e}")) finally: if request_item: request_queue.task_done() logger.info("--- Queue Worker Stopped ---")