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fix: use insecure grpc channel with emulator #946

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merged 6 commits into from Apr 11, 2024
Merged

fix: use insecure grpc channel with emulator #946

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0ff1350
fix: use insecure grpc channel with emulator
daniel-sanche Mar 19, 2024
7f73d01
use self._credentials
daniel-sanche Mar 19, 2024
14f7323
fixed lint
daniel-sanche Mar 20, 2024
9bbd7a5
don't use credentials with emulator
daniel-sanche Mar 20, 2024
a3650c2
fixed typo
daniel-sanche Apr 11, 2024
d4e54fa
fixed tests
daniel-sanche Apr 11, 2024
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52 changes: 7 additions & 45 deletions google/cloud/bigtable/client.py
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Expand Up @@ -32,7 +32,6 @@
import grpc # type: ignore

from google.api_core.gapic_v1 import client_info as client_info_lib
import google.auth # type: ignore
from google.auth.credentials import AnonymousCredentials # type: ignore

from google.cloud import bigtable_v2
Expand Down Expand Up @@ -215,58 +214,21 @@ def _get_scopes(self):
return scopes

def _emulator_channel(self, transport, options):
"""Create a channel using self._credentials
"""Create a channelfor use with the Bigtable emulator.
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Typo in channelfor


Works in a similar way to ``grpc.secure_channel`` but using
``grpc.local_channel_credentials`` rather than
``grpc.ssh_channel_credentials`` to allow easy connection to a
local emulator.
Insecure channels are used for the emulator as secure channels
cannot be used to communicate on some environments.
https://github.com/googleapis/python-firestore/issues/359

Returns:
grpc.Channel or grpc.aio.Channel
"""
# TODO: Implement a special credentials type for emulator and use
# "transport.create_channel" to create gRPC channels once google-auth
# extends it's allowed credentials types.
# Note: this code also exists in the firestore client.
if "GrpcAsyncIOTransport" in str(transport.__name__):
return grpc.aio.secure_channel(
self._emulator_host,
self._local_composite_credentials(),
options=options,
)
channel_fn = grpc.aio.insecure_channel
else:
return grpc.secure_channel(
self._emulator_host,
self._local_composite_credentials(),
options=options,
)

def _local_composite_credentials(self):
"""Create credentials for the local emulator channel.

:return: grpc.ChannelCredentials
"""
credentials = google.auth.credentials.with_scopes_if_required(
self._credentials, None
)
request = google.auth.transport.requests.Request()

# Create the metadata plugin for inserting the authorization header.
metadata_plugin = google.auth.transport.grpc.AuthMetadataPlugin(
credentials, request
)

# Create a set of grpc.CallCredentials using the metadata plugin.
google_auth_credentials = grpc.metadata_call_credentials(metadata_plugin)

# Using the local_credentials to allow connection to emulator
local_credentials = grpc.local_channel_credentials()

# Combine the local credentials and the authorization credentials.
return grpc.composite_channel_credentials(
local_credentials, google_auth_credentials
)
channel_fn = grpc.insecure_channel
return channel_fn(self._emulator_host, options=options)

def _create_gapic_client_channel(self, client_class, grpc_transport):
if self._emulator_host is not None:
Expand Down