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# Copyright 2016, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Tests server and client side metadata API."""
import unittest
import weakref
import grpc
from grpc import _grpcio_metadata
from grpc.framework.foundation import logging_pool
from tests.unit import test_common
from tests.unit.framework.common import test_constants
_CHANNEL_ARGS = (('grpc.primary_user_agent', 'primary-agent'),
('grpc.secondary_user_agent', 'secondary-agent'))
_REQUEST = b'\x00\x00\x00'
_RESPONSE = b'\x00\x00\x00'
_UNARY_UNARY = b'/test/UnaryUnary'
_UNARY_STREAM = b'/test/UnaryStream'
_STREAM_UNARY = b'/test/StreamUnary'
_STREAM_STREAM = b'/test/StreamStream'
_USER_AGENT = 'Python-gRPC-{}'.format(_grpcio_metadata.__version__)
_CLIENT_METADATA = (
(b'client-md-key', b'client-md-key'),
(b'client-md-key-bin', b'\x00\x01')
)
_SERVER_INITIAL_METADATA = (
(b'server-initial-md-key', b'server-initial-md-value'),
(b'server-initial-md-key-bin', b'\x00\x02')
)
_SERVER_TRAILING_METADATA = (
(b'server-trailing-md-key', b'server-trailing-md-value'),
(b'server-trailing-md-key-bin', b'\x00\x03')
)
def user_agent(metadata):
for key, val in metadata:
if key == b'user-agent':
return val.decode('ascii')
raise KeyError('No user agent!')
def validate_client_metadata(test, servicer_context):
test.assertTrue(test_common.metadata_transmitted(
_CLIENT_METADATA, servicer_context.invocation_metadata()))
test.assertTrue(user_agent(servicer_context.invocation_metadata())
.startswith('primary-agent ' + _USER_AGENT))
test.assertTrue(user_agent(servicer_context.invocation_metadata())
.endswith('secondary-agent'))
def handle_unary_unary(test, request, servicer_context):
validate_client_metadata(test, servicer_context)
servicer_context.send_initial_metadata(_SERVER_INITIAL_METADATA)
servicer_context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
return _RESPONSE
def handle_unary_stream(test, request, servicer_context):
validate_client_metadata(test, servicer_context)
servicer_context.send_initial_metadata(_SERVER_INITIAL_METADATA)
servicer_context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
for _ in range(test_constants.STREAM_LENGTH):
yield _RESPONSE
def handle_stream_unary(test, request_iterator, servicer_context):
validate_client_metadata(test, servicer_context)
servicer_context.send_initial_metadata(_SERVER_INITIAL_METADATA)
servicer_context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
# TODO(issue:#6891) We should be able to remove this loop
for request in request_iterator:
pass
return _RESPONSE
def handle_stream_stream(test, request_iterator, servicer_context):
validate_client_metadata(test, servicer_context)
servicer_context.send_initial_metadata(_SERVER_INITIAL_METADATA)
servicer_context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
# TODO(issue:#6891) We should be able to remove this loop,
# and replace with return; yield
for request in request_iterator:
yield _RESPONSE
class _MethodHandler(grpc.RpcMethodHandler):
def __init__(self, test, request_streaming, response_streaming):
self.request_streaming = request_streaming
self.response_streaming = response_streaming
self.request_deserializer = None
self.response_serializer = None
self.unary_unary = None
self.unary_stream = None
self.stream_unary = None
self.stream_stream = None
if self.request_streaming and self.response_streaming:
self.stream_stream = lambda x, y: handle_stream_stream(test, x, y)
elif self.request_streaming:
self.stream_unary = lambda x, y: handle_stream_unary(test, x, y)
elif self.response_streaming:
self.unary_stream = lambda x, y: handle_unary_stream(test, x, y)
else:
self.unary_unary = lambda x, y: handle_unary_unary(test, x, y)
class _GenericHandler(grpc.GenericRpcHandler):
def __init__(self, test):
self._test = test
def service(self, handler_call_details):
if handler_call_details.method == _UNARY_UNARY:
return _MethodHandler(self._test, False, False)
elif handler_call_details.method == _UNARY_STREAM:
return _MethodHandler(self._test, False, True)
elif handler_call_details.method == _STREAM_UNARY:
return _MethodHandler(self._test, True, False)
elif handler_call_details.method == _STREAM_STREAM:
return _MethodHandler(self._test, True, True)
else:
return None
class MetadataTest(unittest.TestCase):
def setUp(self):
self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
self._server = grpc.server((_GenericHandler(weakref.proxy(self)),),
self._server_pool)
port = self._server.add_insecure_port('[::]:0')
self._server.start()
self._channel = grpc.insecure_channel('localhost:%d' % port,
options=_CHANNEL_ARGS)
def tearDown(self):
self._server.stop(0)
def testUnaryUnary(self):
multi_callable = self._channel.unary_unary(_UNARY_UNARY)
unused_response, call = multi_callable(
_REQUEST, metadata=_CLIENT_METADATA, with_call=True)
self.assertTrue(test_common.metadata_transmitted(
_SERVER_INITIAL_METADATA, call.initial_metadata()))
self.assertTrue(test_common.metadata_transmitted(
_SERVER_TRAILING_METADATA, call.trailing_metadata()))
def testUnaryStream(self):
multi_callable = self._channel.unary_stream(_UNARY_STREAM)
call = multi_callable(_REQUEST, metadata=_CLIENT_METADATA)
self.assertTrue(test_common.metadata_transmitted(
_SERVER_INITIAL_METADATA, call.initial_metadata()))
for _ in call:
pass
self.assertTrue(test_common.metadata_transmitted(
_SERVER_TRAILING_METADATA, call.trailing_metadata()))
def testStreamUnary(self):
multi_callable = self._channel.stream_unary(_STREAM_UNARY)
unused_response, call = multi_callable(
[_REQUEST] * test_constants.STREAM_LENGTH,
metadata=_CLIENT_METADATA, with_call=True)
self.assertTrue(test_common.metadata_transmitted(
_SERVER_INITIAL_METADATA, call.initial_metadata()))
self.assertTrue(test_common.metadata_transmitted(
_SERVER_TRAILING_METADATA, call.trailing_metadata()))
def testStreamStream(self):
multi_callable = self._channel.stream_stream(_STREAM_STREAM)
call = multi_callable([_REQUEST] * test_constants.STREAM_LENGTH,
metadata=_CLIENT_METADATA)
self.assertTrue(test_common.metadata_transmitted(
_SERVER_INITIAL_METADATA, call.initial_metadata()))
for _ in call:
pass
self.assertTrue(test_common.metadata_transmitted(
_SERVER_TRAILING_METADATA, call.trailing_metadata()))
if __name__ == '__main__':
unittest.main(verbosity=2)
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