feat: add suport for mapping exceptions to rest callables

Author: ohmayr

google/api_core/gapic_v1/method_async.py

@@ -19,7 +19,7 @@
 
 import functools
 
-from google.api_core import grpc_helpers_async
+from google.api_core import grpc_helpers_async, rest_helpers_async
 from google.api_core.gapic_v1 import client_info
 from google.api_core.gapic_v1.method import _GapicCallable
 from google.api_core.gapic_v1.method import DEFAULT  # noqa: F401
@@ -32,6 +32,7 @@ def wrap_method(
     default_timeout=None,
     default_compression=None,
     client_info=client_info.DEFAULT_CLIENT_INFO,
+    kind="grpc"
 ):
     """Wrap an async RPC method with common behavior.
 
@@ -40,7 +41,10 @@ def wrap_method(
             and ``compression`` arguments and applies the common error mapping,
             retry, timeout, metadata, and compression behavior to the low-level RPC method.
     """
-    func = grpc_helpers_async.wrap_errors(func)
+    if kind == "rest":
+        func = rest_helpers_async.wrap_errors(func)
+    else:
+        func = grpc_helpers_async.wrap_errors(func)
 
     metadata = [client_info.to_grpc_metadata()] if client_info is not None else None
 

google/api_core/rest_helpers_async.py

@@ -0,0 +1,54 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""AsyncIO helpers for :mod:`rest` supporting 3.7+.
+"""
+
+
+import functools
+
+import google.auth
+from google.api_core import exceptions
+
+
+
+class _RestCall():
+    """Wrapped Rest Call to map exceptions."""
+
+    def __init__(self):
+        self._call = None
+
+    def with_call(self, call):
+        """Supplies the call object separately to keep __init__ clean."""
+        self._call = call
+        return self
+    
+    async def __call__(self):
+        try:
+            return await self._call
+        except google.auth.exceptions.TransportError as rpc_exc:
+            raise exceptions.GoogleAPICallError(str(rpc_exc), errors=(rpc_exc,), response=rpc_exc)
+
+
+def wrap_errors(callable_):
+    """Map errors for REST async callables."""
+
+    @functools.wraps(callable_)
+    async def error_remapped_callable(*args, **kwargs):
+        call = callable_(*args, **kwargs)
+        call = _RestCall().with_call(call)
+        response = await call()
+        return response
+
+    return error_remapped_callable