Simple RPC with Protobuf Services
Project description
hyper-rpc
Simple RPC with Protobuf Services
Uses grpcio_tools and purerpc under the hood.
Install
$ pip install hyper-rpc
Example
TLDR; See the example directory
Define an RPC service in a greeter.proto
.
syntax = "proto3";
service Greeter {
rpc SayHello (HelloRequest) returns (HelloReply) {}
rpc SayHelloGoodbye (HelloRequest) returns (stream HelloReply) {}
rpc SayHelloToMany (stream HelloRequest) returns (stream HelloReply) {}
rpc SayHelloToManyAtOnce (stream HelloRequest) returns (HelloReply) {}
}
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}
Then generate the services and stubs with hyper-rpc
.
$ pip install hyper-rpc
$ hrpc greeter.proto
This creates greeter_gprc.py
(services) and greeter_pb2.py
(stubs) files.
You can then write an async-ready server.
"""Greeter server."""
from greeter_grpc import GreeterServicer
from greeter_pb2 import HelloReply, HelloRequest
from purerpc import Server
class Greeter(GreeterServicer):
async def SayHello(self, message):
return HelloReply(message=f"Hello {message.name}")
async def SayHelloToMany(self, input_messages):
async for message in input_messages:
yield HelloReply(message=f"Hello, {message.name}")
if __name__ == "__main__":
server = Server(50055)
server.add_service(Greeter().service)
server.serve(backend="trio")
And a client.
"""Greeter client."""
import anyio
import purerpc
from greeter_grpc import GreeterStub
from greeter_pb2 import HelloReply, HelloRequest
async def gen():
for i in range(5):
yield HelloRequest(name=str(i))
async def main():
async with purerpc.insecure_channel("localhost", 50055) as channel:
stub = GreeterStub(channel)
reply = await stub.SayHello(HelloRequest(name="World"))
print(reply.message)
async for reply in stub.SayHelloToMany(gen()):
print(reply.message)
if __name__ == "__main__":
anyio.run(main, backend="trio")
And run them in separate terminals to see the output.
$ python server.py # terminal 1
$ python client.py # terminal 2
Output:
Hello, World
Hello, 0
Hello, 1
Hello, 2
Hello, 3
Hello, 4
Go forth and Remote Procedure Call.
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