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# Copyright 2015 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 interoperability test client."""
import os
from absl import app
from absl.flags import argparse_flags
from google import auth as google_auth
from google.auth import jwt as google_auth_jwt
import grpc
from src.proto.grpc.testing import test_pb2_grpc
from tests.interop import methods
from tests.interop import resources
def parse_interop_client_args(argv):
parser = argparse_flags.ArgumentParser()
parser.add_argument(
"--server_host",
default="localhost",
type=str,
help="the host to which to connect",
)
parser.add_argument(
"--server_port",
type=int,
required=True,
help="the port to which to connect",
)
parser.add_argument(
"--test_case",
default="large_unary",
type=str,
help="the test case to execute",
)
parser.add_argument(
"--use_tls",
default=False,
type=resources.parse_bool,
help="require a secure connection",
)
parser.add_argument(
"--use_alts",
default=False,
type=resources.parse_bool,
help="require an ALTS secure connection",
)
parser.add_argument(
"--use_test_ca",
default=False,
type=resources.parse_bool,
help="replace platform root CAs with ca.pem",
)
parser.add_argument(
"--custom_credentials_type",
choices=["compute_engine_channel_creds"],
default=None,
help="use google default credentials",
)
parser.add_argument(
"--server_host_override",
type=str,
help="the server host to which to claim to connect",
)
parser.add_argument(
"--oauth_scope", type=str, help="scope for OAuth tokens"
)
parser.add_argument(
"--default_service_account",
type=str,
help="email address of the default service account",
)
parser.add_argument(
"--grpc_test_use_grpclb_with_child_policy",
type=str,
help=(
"If non-empty, set a static service config on channels created by "
+ "grpc::CreateTestChannel, that configures the grpclb LB policy "
+ "with a child policy being the value of this flag (e.g."
" round_robin " + "or pick_first)."
),
)
return parser.parse_args(argv[1:])
def _create_call_credentials(args):
if args.test_case == "oauth2_auth_token":
google_credentials, unused_project_id = google_auth.default(
scopes=[args.oauth_scope]
)
google_credentials.refresh(google_auth.transport.requests.Request())
return grpc.access_token_call_credentials(google_credentials.token)
elif args.test_case == "compute_engine_creds":
google_credentials, unused_project_id = google_auth.default(
scopes=[args.oauth_scope]
)
return grpc.metadata_call_credentials(
google_auth.transport.grpc.AuthMetadataPlugin(
credentials=google_credentials,
request=google_auth.transport.requests.Request(),
)
)
elif args.test_case == "jwt_token_creds":
google_credentials = (
google_auth_jwt.OnDemandCredentials.from_service_account_file(
os.environ[google_auth.environment_vars.CREDENTIALS]
)
)
return grpc.metadata_call_credentials(
google_auth.transport.grpc.AuthMetadataPlugin(
credentials=google_credentials, request=None
)
)
else:
return None
def get_secure_channel_parameters(args):
call_credentials = _create_call_credentials(args)
channel_opts = ()
if args.grpc_test_use_grpclb_with_child_policy:
channel_opts += (
(
"grpc.service_config",
'{"loadBalancingConfig": [{"grpclb": {"childPolicy": [{"%s":'
" {}}]}}]}" % args.grpc_test_use_grpclb_with_child_policy,
),
)
if args.custom_credentials_type is not None:
if args.custom_credentials_type == "compute_engine_channel_creds":
assert call_credentials is None
google_credentials, unused_project_id = google_auth.default(
scopes=[args.oauth_scope]
)
call_creds = grpc.metadata_call_credentials(
google_auth.transport.grpc.AuthMetadataPlugin(
credentials=google_credentials,
request=google_auth.transport.requests.Request(),
)
)
channel_credentials = grpc.compute_engine_channel_credentials(
call_creds
)
else:
raise ValueError(
"Unknown credentials type '{}'".format(
args.custom_credentials_type
)
)
elif args.use_tls:
if args.use_test_ca:
root_certificates = resources.test_root_certificates()
else:
root_certificates = None # will load default roots.
channel_credentials = grpc.ssl_channel_credentials(root_certificates)
if call_credentials is not None:
channel_credentials = grpc.composite_channel_credentials(
channel_credentials, call_credentials
)
if args.server_host_override:
channel_opts += (
(
"grpc.ssl_target_name_override",
args.server_host_override,
),
)
elif args.use_alts:
channel_credentials = grpc.alts_channel_credentials()
return channel_credentials, channel_opts
def _create_channel(args):
target = "{}:{}".format(args.server_host, args.server_port)
if (
args.use_tls
or args.use_alts
or args.custom_credentials_type is not None
):
channel_credentials, options = get_secure_channel_parameters(args)
return grpc.secure_channel(target, channel_credentials, options)
else:
return grpc.insecure_channel(target)
def create_stub(channel, args):
if args.test_case == "unimplemented_service":
return test_pb2_grpc.UnimplementedServiceStub(channel)
else:
return test_pb2_grpc.TestServiceStub(channel)
def _test_case_from_arg(test_case_arg):
for test_case in methods.TestCase:
if test_case_arg == test_case.value:
return test_case
else:
raise ValueError('No test case "%s"!' % test_case_arg)
def test_interoperability(args):
channel = _create_channel(args)
stub = create_stub(channel, args)
test_case = _test_case_from_arg(args.test_case)
test_case.test_interoperability(stub, args)
if __name__ == "__main__":
app.run(test_interoperability, flags_parser=parse_interop_client_args)
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