Grpc - send message from one client to another client that is connected to the same server

Question

Is it possible to send message from one client to another client that is connected to the same server?

I want send data from one client to server Then send to specific client. I think I need to get client ID but I dont know how to get this id and how to send this message to that client from server.

Answer 1

I have a sample here. This is a chat server-client application. Multiple clients can connect to the server. When a client writes a message, the server simply broadcasts it for all clients who are receiving server stream RPC.

https://github.com/cactuaroid/GrpcWpfSample

See these server side implementation. When a client calls Subscribe(), it awaits m_chatService.Added event. When a client calls Write(), it raises the event and event args ChatLog is written on responseStream.

https://github.com/cactuaroid/GrpcWpfSample/blob/f6e8c4b2493c23cdcbaffeca29b5bb6705fbe95c/GrpcWpfSample.Server/Grpc/ChatServiceGrpcServer.cs https://github.com/cactuaroid/GrpcWpfSample/blob/f6e8c4b2493c23cdcbaffeca29b5bb6705fbe95c/GrpcWpfSample.Server/Model/ChatService.cs

You can add your logic such as specifying channel name to subscribe/write, or define OpenChannel(string password) to be called by client at the first time so that server can bind the client IP address to the channel, whatever as you like.