Revert "bypass proxies for schedule API"

This reverts commit bfbb8920e2.

models/schedule.py

@@ -10,7 +10,7 @@ import time
 from typing import Any
 from urllib.error import HTTPError, URLError
 from urllib.parse import quote
-from urllib.request import ProxyHandler, Request, build_opener
+from urllib.request import Request, urlopen
 from zoneinfo import ZoneInfo
 
 import config
@@ -30,11 +30,9 @@ MOSCOW = ZoneInfo("Europe/Moscow")
 _CACHE_TTL = 300.0
 _REQUEST_TIMEOUT = 10.0
 _FAILURE_RETRY_DELAY = 30.0
-_REQUEST_ATTEMPTS = 2
 _cache: dict[str, tuple[float, list[dict[str, Any]]]] = {}
 _failures: dict[str, tuple[float, str]] = {}
 _cache_lock = threading.RLock()
-_direct_opener = build_opener(ProxyHandler({}))
 
 
 class ScheduleAPIError(RuntimeError):
@@ -57,32 +55,19 @@ def _load_result(path: str) -> list[dict[str, Any]]:
                 return cached[1]
             raise ScheduleAPIError(failure[1])
 
-    url = _api_url(path)
-    request = Request(url, headers={"Accept": "application/json"})
-    error: Exception | None = None
-    payload: Any = None
-    for _ in range(_REQUEST_ATTEMPTS):
-        try:
-            with _direct_opener.open(request, timeout=_REQUEST_TIMEOUT) as response:
-                payload = json.load(response)
-            error = None
-            break
-        except (HTTPError, URLError, TimeoutError, OSError, ValueError) as attempt_error:
-            error = attempt_error
-
-    if error is not None:
-        message = f"Не удалось получить {url}: {error}"
+    request = Request(_api_url(path), headers={"Accept": "application/json"})
+    try:
+        with urlopen(request, timeout=_REQUEST_TIMEOUT) as response:
+            payload = json.load(response)
+    except (HTTPError, URLError, TimeoutError, OSError, ValueError) as error:
+        message = f"Не удалось получить {path}: {error}"
         with _cache_lock:
             _failures[path] = (now + _FAILURE_RETRY_DELAY, message)
         if cached:
             return cached[1]
         raise ScheduleAPIError(message) from error
 
-    if (
-        not isinstance(payload, dict)
-        or payload.get("ok") is not True
-        or not isinstance(payload.get("result"), list)
-    ):
+    if payload.get("ok") is not True or not isinstance(payload.get("result"), list):
         if cached:
             return cached[1]
         raise ScheduleAPIError(f"Сервер вернул некорректный ответ для {path}")