The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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# Copyright 2019 the gRPC authors.
#
# 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.
"""The Python implementation of the GRPC helloworld.Greeter client."""
from concurrent import futures
import contextlib
import datetime
import logging
import unittest
from google.protobuf import duration_pb2
from google.protobuf import timestamp_pb2
import grpc
import helloworld_pb2
import helloworld_pb2_grpc
_HOST = "localhost"
_SERVER_ADDRESS = "{}:0".format(_HOST)
class Greeter(helloworld_pb2_grpc.GreeterServicer):
def SayHello(self, request, context):
request_in_flight = (
datetime.datetime.now() - request.request_initiation.ToDatetime()
)
request_duration = duration_pb2.Duration()
request_duration.FromTimedelta(request_in_flight)
return helloworld_pb2.HelloReply(
message="Hello, %s!" % request.name,
request_duration=request_duration,
)
@contextlib.contextmanager
def _listening_server():
server = grpc.server(futures.ThreadPoolExecutor())
helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
port = server.add_insecure_port(_SERVER_ADDRESS)
server.start()
try:
yield port
finally:
server.stop(0)
class ImportTest(unittest.TestCase):
def test_import(self):
with _listening_server() as port:
with grpc.insecure_channel("{}:{}".format(_HOST, port)) as channel:
stub = helloworld_pb2_grpc.GreeterStub(channel)
request_timestamp = timestamp_pb2.Timestamp()
request_timestamp.GetCurrentTime()
response = stub.SayHello(
helloworld_pb2.HelloRequest(
name="you",
request_initiation=request_timestamp,
),
wait_for_ready=True,
)
self.assertEqual(response.message, "Hello, you!")
self.assertGreater(response.request_duration.nanos, 0)
if __name__ == "__main__":
logging.basicConfig()
unittest.main()