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import json
import pytest
import grpclib.const
import grpclib.server
from grpclib.client import UnaryUnaryMethod
from grpclib.events import _DispatchServerEvents
from grpclib.exceptions import GRPCError
from grpclib.encoding.base import CodecBase
from grpclib.encoding.proto import ProtoCodec
from conn import ClientStream, ClientServer, ServerStream
from conn import grpc_encode, grpc_decode
from dummy_pb2 import DummyRequest
class JSONCodec(CodecBase):
__content_subtype__ = 'json'
def encode(self, message, message_type):
return json.dumps(message, ensure_ascii=False).encode('utf-8')
def decode(self, data: bytes, message_type):
return json.loads(data.decode('utf-8'))
class PingServiceHandler:
async def UnaryUnary(self, stream):
request = await stream.recv_message()
assert request == {'value': 'ping'}
await stream.send_message({'value': 'pong'})
def __mapping__(self):
return {
'/ping.PingService/UnaryUnary': grpclib.const.Handler(
self.UnaryUnary,
grpclib.const.Cardinality.UNARY_UNARY,
None,
None,
),
}
class PingServiceStub:
def __init__(self, channel):
self.UnaryUnary = UnaryUnaryMethod(
channel,
'/ping.PingService/UnaryUnary',
None,
None,
)
@pytest.mark.asyncio
async def test_rpc_call():
ctx = ClientServer(PingServiceHandler, PingServiceStub, codec=JSONCodec())
async with ctx as (handler, stub):
reply = await stub.UnaryUnary({'value': 'ping'})
assert reply == {'value': 'pong'}
@pytest.mark.asyncio
async def test_client_receive_json():
cs = ClientStream(codec=JSONCodec())
async with cs.client_stream as stream:
await stream.send_request()
*_, request_received = cs.client_conn.to_server_transport.events()
await stream.send_message({'value': 'ping'}, end=True)
content_type = dict(request_received.headers)['content-type']
assert content_type == 'application/grpc+json'
cs.client_conn.server_h2c.send_headers(
request_received.stream_id,
[
(':status', '200'),
('content-type', 'application/grpc+json'),
],
)
cs.client_conn.server_h2c.send_data(
request_received.stream_id,
grpc_encode({'value': 'pong'}, None, JSONCodec()),
)
cs.client_conn.server_h2c.send_headers(
request_received.stream_id,
[
('grpc-status', str(grpclib.const.Status.OK.value)),
],
end_stream=True,
)
cs.client_conn.server_flush()
reply = await stream.recv_message()
assert reply == {'value': 'pong'}
@pytest.mark.asyncio
async def test_client_receive_invalid():
cs = ClientStream(codec=JSONCodec())
with pytest.raises(GRPCError) as exc:
async with cs.client_stream as stream:
await stream.send_request()
*_, request_received = cs.client_conn.to_server_transport.events()
content_type = dict(request_received.headers)['content-type']
assert content_type == 'application/grpc+json'
cs.client_conn.server_h2c.send_headers(
request_received.stream_id,
[
(':status', '200'),
('content-type', 'application/grpc+proto'),
],
)
cs.client_conn.server_h2c.send_data(
request_received.stream_id,
grpc_encode({'value': 'pong'}, None, JSONCodec()),
)
cs.client_conn.server_h2c.send_headers(
request_received.stream_id,
[
('grpc-status', str(grpclib.const.Status.OK.value)),
],
end_stream=True,
)
cs.client_conn.server_flush()
await stream.recv_message()
exc.match(r"Invalid content-type: 'application/grpc\+proto'")
@pytest.mark.asyncio
async def test_server_receive_json():
handler = PingServiceHandler()
mapping = handler.__mapping__()
path = next(iter(mapping.keys()))
ss = ServerStream(codec=JSONCodec(), path=path,
content_type='application/grpc+json')
ss.server_conn.client_h2c.send_data(
ss.stream_id,
grpc_encode({'value': 'ping'}, None, JSONCodec()),
end_stream=True,
)
ss.server_conn.client_flush()
await grpclib.server.request_handler(
handler.__mapping__(),
ss.server_h2s,
ss.server_conn.server_proto.processor.handler.headers,
JSONCodec(),
None,
_DispatchServerEvents(),
lambda: None,
)
response_received, data_received, trailers_received, _ = \
ss.server_conn.to_client_transport.events()
assert dict(response_received.headers)[':status'] == '200'
assert dict(response_received.headers)['content-type'] == \
'application/grpc+json'
reply = grpc_decode(data_received.data, None, JSONCodec())
assert reply == {'value': 'pong'}
assert dict(trailers_received.headers)['grpc-status'] == '0'
@pytest.mark.asyncio
async def test_server_receive_invalid():
handler = PingServiceHandler()
mapping = handler.__mapping__()
path = next(iter(mapping.keys()))
ss = ServerStream(codec=JSONCodec(), path=path,
content_type='application/grpc+invalid')
ss.server_conn.client_h2c.send_data(
ss.stream_id,
grpc_encode({'value': 'ping'}, None, JSONCodec()),
end_stream=True,
)
ss.server_conn.client_flush()
await grpclib.server.request_handler(
handler.__mapping__(),
ss.server_h2s,
ss.server_conn.server_proto.processor.handler.headers,
JSONCodec(),
None,
_DispatchServerEvents(),
lambda: None,
)
response_received, _ = ss.server_conn.to_client_transport.events()
assert dict(response_received.headers)[':status'] == '415'
assert dict(response_received.headers)['grpc-status'] == '2'
assert dict(response_received.headers)['grpc-message'] == \
'Unacceptable content-type header'
@pytest.mark.asyncio
async def test_server_return_json():
ss = ServerStream(codec=JSONCodec())
ss.server_conn.client_h2c.send_data(
ss.stream_id,
grpc_encode({'value': 'ping'}, None, JSONCodec()),
end_stream=True,
)
ss.server_conn.client_flush()
message = await ss.server_stream.recv_message()
assert message == {'value': 'ping'}
await ss.server_stream.send_initial_metadata()
response_received, = ss.server_conn.to_client_transport.events()
content_type = dict(response_received.headers)['content-type']
assert content_type == 'application/grpc+json'
await ss.server_stream.send_message({'value': 'pong'})
data_received, = ss.server_conn.to_client_transport.events()
reply = grpc_decode(data_received.data, None, JSONCodec())
assert reply == {'value': 'pong'}
def test_proto_invalid_type():
codec = ProtoCodec()
assert codec.encode(DummyRequest(value='42'), DummyRequest) == \
DummyRequest(value='42').SerializeToString()
with pytest.raises(TypeError, match='Message must be of type'):
codec.encode(1, DummyRequest)
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