[New Feature] Rest API implementation to showcase the OpenDBM features

rest_api/app/utils/request_exceptions.py

@@ -0,0 +1,22 @@
+from fastapi.encoders import jsonable_encoder
+from fastapi.exceptions import RequestValidationError
+
+from starlette.exceptions import HTTPException
+from starlette.requests import Request
+from starlette.responses import JSONResponse
+from starlette.status import HTTP_422_UNPROCESSABLE_ENTITY
+
+
+async def http_exception_handler(
+    request: Request, exc: HTTPException
+) -> JSONResponse:
+    return JSONResponse({"detail": exc.detail}, status_code=exc.status_code)
+
+
+async def request_validation_exception_handler(
+    request: Request, exc: RequestValidationError
+) -> JSONResponse:
+    return JSONResponse(
+        status_code=HTTP_422_UNPROCESSABLE_ENTITY,
+        content={"detail": jsonable_encoder(exc.errors())},
+    )