Allow ConfigParser or a io.IO[Any] on log_config (#1976)

* Enabled to pass log_config as ConfigParser instance or a file object

* Rebase correctly

---------

Co-authored-by: Marcelo Trylesinski <marcelotryle@gmail.com>

tests/test_config.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import configparser
+import io
 import json
 import logging
 import os
@@ -369,14 +371,18 @@ def test_log_config_yaml(
     mocked_logging_config_module.dictConfig.assert_called_once_with(logging_config)
 
 
-def test_log_config_file(mocked_logging_config_module: MagicMock) -> None:
+@pytest.mark.parametrize("config_file", ["log_config.ini", configparser.ConfigParser(), io.StringIO()])
+def test_log_config_file(
+    mocked_logging_config_module: MagicMock,
+    config_file: str | configparser.RawConfigParser | typing.IO[Any],
+) -> None:
     """
     Test that one can load a configparser config from disk.
     """
-    config = Config(app=asgi_app, log_config="log_config")
+    config = Config(app=asgi_app, log_config=config_file)
     config.load()
 
-    mocked_logging_config_module.fileConfig.assert_called_once_with("log_config", disable_existing_loggers=False)
+    mocked_logging_config_module.fileConfig.assert_called_once_with(config_file, disable_existing_loggers=False)
 
 
 @pytest.fixture(params=[0, 1])

uvicorn/config.py

@@ -9,8 +9,9 @@
 import socket
 import ssl
 import sys
+from configparser import RawConfigParser
 from pathlib import Path
-from typing import Any, Awaitable, Callable, Literal
+from typing import IO, Any, Awaitable, Callable, Literal
 
 import click
 
@@ -189,7 +190,7 @@ def __init__(
         ws_per_message_deflate: bool = True,
         lifespan: LifespanType = "auto",
         env_file: str | os.PathLike[str] | None = None,
-        log_config: dict[str, Any] | str | None = LOGGING_CONFIG,
+        log_config: dict[str, Any] | str | RawConfigParser | IO[Any] | None = LOGGING_CONFIG,
         log_level: str | int | None = None,
         access_log: bool = True,
         use_colors: bool | None = None,
@@ -362,11 +363,11 @@ def configure_logging(self) -> None:
                     self.log_config["formatters"]["default"]["use_colors"] = self.use_colors
                     self.log_config["formatters"]["access"]["use_colors"] = self.use_colors
                 logging.config.dictConfig(self.log_config)
-            elif self.log_config.endswith(".json"):
+            elif isinstance(self.log_config, str) and self.log_config.endswith(".json"):
                 with open(self.log_config) as file:
                     loaded_config = json.load(file)
                     logging.config.dictConfig(loaded_config)
-            elif self.log_config.endswith((".yaml", ".yml")):
+            elif isinstance(self.log_config, str) and self.log_config.endswith((".yaml", ".yml")):
                 # Install the PyYAML package or the uvicorn[standard] optional
                 # dependencies to enable this functionality.
                 import yaml

uvicorn/main.py

@@ -6,7 +6,8 @@
 import platform
 import ssl
 import sys
-from typing import Any, Callable
+from configparser import RawConfigParser
+from typing import IO, Any, Callable
 
 import click
 
@@ -481,7 +482,7 @@ def run(
     reload_delay: float = 0.25,
     workers: int | None = None,
     env_file: str | os.PathLike[str] | None = None,
-    log_config: dict[str, Any] | str | None = LOGGING_CONFIG,
+    log_config: dict[str, Any] | str | RawConfigParser | IO[Any] | None = LOGGING_CONFIG,
     log_level: str | int | None = None,
     access_log: bool = True,
     proxy_headers: bool = True,