1# Copyright 2020 The gRPC Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""Reference implementation for status mapping in gRPC Python.""" 15 16from grpc.experimental import aio 17 18from google.rpc import status_pb2 19 20from ._common import code_to_grpc_status_code, GRPC_DETAILS_METADATA_KEY 21 22 23async def from_call(call: aio.Call): 24 """Returns a google.rpc.status.Status message from a given grpc.aio.Call. 25 26 This is an EXPERIMENTAL API. 27 28 Args: 29 call: An grpc.aio.Call instance. 30 31 Returns: 32 A google.rpc.status.Status message representing the status of the RPC. 33 """ 34 code = await call.code() 35 details = await call.details() 36 trailing_metadata = await call.trailing_metadata() 37 if trailing_metadata is None: 38 return None 39 for key, value in trailing_metadata: 40 if key == GRPC_DETAILS_METADATA_KEY: 41 rich_status = status_pb2.Status.FromString(value) 42 if code.value[0] != rich_status.code: 43 raise ValueError( 44 'Code in Status proto (%s) doesn\'t match status code (%s)' 45 % (code_to_grpc_status_code(rich_status.code), code)) 46 if details != rich_status.message: 47 raise ValueError( 48 'Message in Status proto (%s) doesn\'t match status details (%s)' 49 % (rich_status.message, details)) 50 return rich_status 51 return None 52 53 54__all__ = [ 55 'from_call', 56] 57