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feat: add --log-level option (#102)

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Fixes https://github.com/sparfenyuk/mcp-proxy/issues/95

This adds the option `--log-level {DEBUG,INFO,WARNING,ERROR,CRITICAL}`
to define the log level. If both `--debug` and `--log-level` are
provided, the former takes precedence.
This commit is contained in:
Baptiste Fontaine
2025-09-22 07:53:19 +02:00
committed by GitHub
parent 1e5091d669
commit 7d71bd08ad
2 changed files with 19 additions and 7 deletions
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5
README.md
View File

@@ -317,7 +317,7 @@ services:
```bash
usage: mcp-proxy [-h] [--version] [-H KEY VALUE] [--transport {sse,streamablehttp}]
[-e KEY VALUE] [--cwd CWD]
[--pass-environment | --no-pass-environment] [--debug | --no-debug]
[--pass-environment | --no-pass-environment] [--log-level LEVEL] [--debug | --no-debug]
[--named-server NAME COMMAND_STRING]
[--named-server-config FILE_PATH] [--port PORT] [--host HOST]
[--stateless | --no-stateless] [--sse-port SSE_PORT]
@@ -346,7 +346,8 @@ stdio client options:
--cwd CWD The working directory to use when spawning the default server process. Named servers inherit the proxy's CWD.
--pass-environment, --no-pass-environment
Pass through all environment variables when spawning all server processes.
--debug, --no-debug Enable debug mode with detailed logging output.
--log-level LEVEL Set the log level. Default is INFO.
--debug, --no-debug Enable debug mode with detailed logging output. Equivalent to --log-level DEBUG. If both --debug and --log-level are provided, --debug takes precedence.
--named-server NAME COMMAND_STRING
Define a named stdio server. NAME is for the URL path /servers/NAME/. COMMAND_STRING is a single string with the command and its arguments (e.g., 'uvx mcp-server-fetch --timeout 10'). These servers inherit the proxy's CWD and environment from --pass-environment.
--named-server-config FILE_PATH

21
src/mcp_proxy/__main__.py
View File

@@ -131,10 +131,21 @@ def _add_arguments_to_parser(parser: argparse.ArgumentParser) -> None:
help="Pass through all environment variables when spawning all server processes.",
default=False,
)
stdio_client_options.add_argument(
"--log-level",
type=str,
default="INFO",
metavar="LEVEL",
choices=["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"],
help="Set the log level. Default is INFO.",
)
stdio_client_options.add_argument(
"--debug",
action=argparse.BooleanOptionalAction,
help="Enable debug mode with detailed logging output.",
help=(
"Enable debug mode with detailed logging output. Equivalent to --log-level DEBUG. "
"If both --debug and --log-level are provided, --debug takes precedence."
),
default=False,
)
stdio_client_options.add_argument(
@@ -203,10 +214,10 @@ def _add_arguments_to_parser(parser: argparse.ArgumentParser) -> None:
)
def _setup_logging(*, debug: bool) -> logging.Logger:
def _setup_logging(*, level: str, debug: bool) -> logging.Logger:
"""Set up logging configuration and return the logger."""
logging.basicConfig(
level=logging.DEBUG if debug else logging.INFO,
level=logging.DEBUG if debug else level,
format="[%(levelname)1.1s %(asctime)s.%(msecs).03d %(name)s] %(message)s",
)
return logging.getLogger(__name__)
@@ -334,7 +345,7 @@ def _create_mcp_settings(args_parsed: argparse.Namespace) -> MCPServerSettings:
port=args_parsed.port if args_parsed.port is not None else args_parsed.sse_port,
stateless=args_parsed.stateless,
allow_origins=args_parsed.allow_origin if len(args_parsed.allow_origin) > 0 else None,
log_level="DEBUG" if args_parsed.debug else "INFO",
log_level="DEBUG" if args_parsed.debug else args_parsed.log_level,
)
@@ -342,7 +353,7 @@ def main() -> None:
"""Start the client using asyncio."""
parser = _setup_argument_parser()
args_parsed = parser.parse_args()
logger = _setup_logging(debug=args_parsed.debug)
logger = _setup_logging(level=args_parsed.log_level, debug=args_parsed.debug)
# Validate required arguments
if (