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grpc design
π: using python and grpc design a code that can communicate via an local network and see how many clients are online, each client will be identified by the current windows username when listing ....the listing function should also be visible on the server app, each client should have the ability to messege each other via the server or peer to peer
π€: To design a code that can communicate via a local network and see how many clients are online, you can use Python and the gRPC library. gRPC is a high-performance, open-source framework for building scalable, high-performance RPC systems. It allows you to define services and methods, and generate client and server code in multiple languages.
Here's an example of how you can use gRPC to create a simple chat application that allows clients to communicate with each other:
- Define the service and methods:
syntax = "proto3";
service ChatService {
rpc SendMessage(Message) returns (Message) {}
rpc GetMessages(Message) returns (Message) {}
}
message Message {
string sender = 1;
string recipient = 2;
string message = 3;
}
This defines a service called ChatService
with two methods: SendMessage
and GetMessages
. The SendMessage
method takes a Message
object as input, and the GetMessages
method returns a list of Message
objects.
- Generate the client and server code:
python -m grpc_tools.protoc --python_out=. --grpc_python_out=. chat.proto
This generates Python code for the client and server.
- Implement the client and server:
# Client
import grpc
channel = grpc.insecure_channel('localhost:50051')
stub = ChatService_pb2_grpc.ChatServiceStub(channel)
def send_message(message):
request = Message(sender='Client', recipient='Server', message=message)
response = stub.SendMessage(request)
print(response.message)
def get_messages():
request = Message(sender='Client', recipient='Server', message='')
response = stub.GetMessages(request)
return response.messages
# Server
import grpc
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
ChatService_pb2_grpc.add_ChatServiceServicer_to_server(ChatService(), server)
server.add_insecure_port('[::]:50051')
server.start()
def send_message(message):
request = Message(sender='Server', recipient='Client', message=message)
response = stub.SendMessage(request)
print(response.message)
def get_messages():
request = Message(sender='Server', recipient='Client', message='')
response = stub.GetMessages(request)
return response.messages
This is a basic implementation of the client and server. The client sends a message to the server using the SendMessage
method, and the server responds with a message using the SendMessage
method. The client can also retrieve a list of messages using the GetMessages
method.
- Run the client and server:
# Client
python client.py
# Server
python server.py
This will start the client and server, and you can send messages between them using the send_message
and get_messages
functions.
Note: This is just a basic example, and you may need to modify it to fit your specific use case. Additionally, you will need to handle errors and exceptions in your code.