1# Copyright 2019 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"""This example handles rich error status in client-side.""" 15 16from __future__ import print_function 17 18import logging 19 20from google.rpc import error_details_pb2 21import grpc 22from grpc_status import rpc_status 23 24from examples.protos import helloworld_pb2 25from examples.protos import helloworld_pb2_grpc 26 27_LOGGER = logging.getLogger(__name__) 28 29 30def process(stub): 31 try: 32 response = stub.SayHello(helloworld_pb2.HelloRequest(name="Alice")) 33 _LOGGER.info("Call success: %s", response.message) 34 except grpc.RpcError as rpc_error: 35 _LOGGER.error("Call failure: %s", rpc_error) 36 status = rpc_status.from_call(rpc_error) 37 for detail in status.details: 38 if detail.Is(error_details_pb2.QuotaFailure.DESCRIPTOR): 39 info = error_details_pb2.QuotaFailure() 40 detail.Unpack(info) 41 _LOGGER.error("Quota failure: %s", info) 42 else: 43 raise RuntimeError("Unexpected failure: %s" % detail) 44 45 46def main(): 47 # NOTE(gRPC Python Team): .close() is possible on a channel and should be 48 # used in circumstances in which the with statement does not fit the needs 49 # of the code. 50 with grpc.insecure_channel("localhost:50051") as channel: 51 stub = helloworld_pb2_grpc.GreeterStub(channel) 52 process(stub) 53 54 55if __name__ == "__main__": 56 logging.basicConfig() 57 main() 58