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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("✅ 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) ⛔ 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 ---")
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