endpoints/bookstore-grpc/bookstore_client.py

# Copyright 2016 Google Inc.
#
# 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 gRPC Bookstore Client Example."""
import argparse

from google.protobuf import empty_pb2
import grpc

import bookstore_pb2_grpc


def run(
    host, port, api_key, auth_token, timeout, use_tls, servername_override, ca_path
):
    """Makes a basic ListShelves call against a gRPC Bookstore server."""

    if use_tls:
        with open(ca_path, "rb") as f:
            creds = grpc.ssl_channel_credentials(f.read())
        channel_opts = ()
        if servername_override:
            channel_opts += (
                (
                    "grpc.ssl_target_name_override",
                    servername_override,
                ),
            )
        channel = grpc.secure_channel(f"{host}:{port}", creds, channel_opts)
    else:
        channel = grpc.insecure_channel(f"{host}:{port}")

    stub = bookstore_pb2_grpc.BookstoreStub(channel)
    metadata = []
    if api_key:
        metadata.append(("x-api-key", api_key))
    if auth_token:
        metadata.append(("authorization", "Bearer " + auth_token))
    shelves = stub.ListShelves(empty_pb2.Empty(), timeout, metadata=metadata)
    print(f"ListShelves: {shelves}")


if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
    )
    parser.add_argument("--host", default="localhost", help="The host to connect to")
    parser.add_argument("--port", type=int, default=8000, help="The port to connect to")
    parser.add_argument(
        "--timeout", type=int, default=10, help="The call timeout, in seconds"
    )
    parser.add_argument(
        "--api_key", default=None, help="The API key to use for the call"
    )
    parser.add_argument(
        "--servername",
        type=str,
        default="",
        help="The servername to use to call the API.",
    )
    parser.add_argument(
        "--ca_path", type=str, default="../roots.pem", help="The path to the CA."
    )
    parser.add_argument(
        "--auth_token", default=None, help="The JWT auth token to use for the call"
    )
    parser.add_argument(
        "--use_tls",
        type=bool,
        default=False,
        help="Enable when the server requires TLS",
    )
    args = parser.parse_args()
    run(
        args.host,
        args.port,
        args.api_key,
        args.auth_token,
        args.timeout,
        args.use_tls,
        args.servername,
        args.ca_path,
    )