참고소스 수정본

crawler_platform/app/main.py

@@ -3,8 +3,8 @@ from __future__ import annotations
 import os
 from pathlib import Path
 
-from fastapi import FastAPI
-from fastapi.responses import FileResponse
+from fastapi import FastAPI, Request
+from fastapi.responses import FileResponse, JSONResponse
 from fastapi.staticfiles import StaticFiles
 
 from crawler_platform.app.api.routes import register_routes
@@ -18,6 +18,11 @@ app = FastAPI(title="Ontology Crawler Platform", version="0.1.0")
 init_db(DATABASE_URL)
 register_routes(app, DATABASE_URL)
 
+
+@app.exception_handler(KeyError)
+def _handle_key_error(_request: Request, exc: KeyError) -> JSONResponse:
+    return JSONResponse(status_code=404, content={"detail": str(exc.args[0]) if exc.args else "not found"})
+
 if STATIC_DIR.exists():
     app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")