Instant messaging server. Backend in pure Golang, wire transport protocol is JSON over websocket. Everything is a message in Open-IM-Server, so you can extend custom messages easily, there is no need to modify the server code. Using microservice architectures, Open-IM-Server can be deployed using clusters. By deployment of the Open-IM-Server on the customer's server, developers can integrate instant messaging and real-time network capabilities into their own applications free of charge and quickly, and ensure the security and privacy of business data. ...