Simplify config example and log API bodies

memory_system_api/server.py

@@ -1,13 +1,17 @@
 """Standalone FastAPI server for Memory System API."""
 from __future__ import annotations
 
-from fastapi import FastAPI
+import logging
+
+from fastapi import FastAPI, Request, Response
 from fastapi.middleware.cors import CORSMiddleware
 
 from .api import router
 from .config import Config, load_config, set_config
 
 
+request_logger = logging.getLogger("memory_system_api.requests")
+
 app = FastAPI(title="Memory System API", version="0.1.0")
 app.add_middleware(
     CORSMiddleware,
@@ -16,6 +20,42 @@ app.add_middleware(
     allow_methods=["*"],
     allow_headers=["*"],
 )
+
+
+@app.middleware("http")
+async def log_request_and_response(request: Request, call_next):
+    request_body = await request.body()
+    request_logger.info(
+        "request %s %s body=%s",
+        request.method,
+        _path_with_query(request),
+        _body_for_log(request_body),
+    )
+
+    async def receive():
+        return {"type": "http.request", "body": request_body, "more_body": False}
+
+    response = await call_next(Request(request.scope, receive))
+    response_body = b""
+    async for chunk in response.body_iterator:
+        response_body += chunk
+
+    request_logger.info(
+        "response %s %s status=%s body=%s",
+        request.method,
+        _path_with_query(request),
+        response.status_code,
+        _body_for_log(response_body),
+    )
+    return Response(
+        content=response_body,
+        status_code=response.status_code,
+        headers=dict(response.headers),
+        media_type=response.media_type,
+        background=response.background,
+    )
+
+
 app.include_router(router)
 
 
@@ -25,6 +65,17 @@ def create_app(config: Config | None = None) -> FastAPI:
     return app
 
 
+def _path_with_query(request: Request) -> str:
+    query = request.url.query
+    return f"{request.url.path}?{query}" if query else request.url.path
+
+
+def _body_for_log(body: bytes) -> str:
+    if not body:
+        return ""
+    return body.decode("utf-8", errors="replace")
+
+
 def main() -> None:
     import argparse
     import uvicorn
@@ -41,6 +92,7 @@ def main() -> None:
     if args.port:
         config.server.port = args.port
     set_config(config)
+    logging.basicConfig(level=config.logging.level.upper(), format=config.logging.format)
 
     uvicorn.run(app, host=config.server.host, port=config.server.port, log_level=config.logging.level.lower())