🚀 OpenIM: An Open-Source Instant Messaging SDK Solution

OpenIM consists of two main components: OpenIMSDK and OpenIMServer. Their main features are:

📦 OpenIMSDK

• Embedded directly into applications as a library.

🖥️ OpenIMServer

• Deployed as an independent server-side program.

📢 Note: OpenIMSDK does not integrate a UI interface, and OpenIMServer does not provide user registration and login functions, meaning it's not a complete IM product.

📘 Detailed about OpenIMSDK

OpenIMSDK is the IM SDK designed for OpenIMServer, made specifically for embedding into client applications. Its main features and technical characteristics are:

🌟 Key Features:

• 📦 Local storage
• 🔔 Listener callback
• 🛡️ API encapsulation
• 🌐 Connection management

📚 Main Modules:

1. 🚀 Initialization and login
2. 👤 User management
3. 👫 Friend management
4. 🤖 Group functions
5. 💬 Conversation handling

🔧 Technical Implementation:

• 🏗️ Written in Golang
• 🌉 Cross-platform compilation using Gomobile
• 🕸️ Web SDK implementation using wasm technology
• 🌌 C interface export via cgo
• 🌍 Covers almost all platforms and languages

Platform/Language	SDK Resource Link	SDK Description	Sample Resource Link	Description
Golang	open-im-sdk-core	Golang version SDK using Gomobile/wasm/cgo	-	-
iOS	open-im-sdk-ios	iOS version SDK	open-im-ios-demo	iOS sample
Android	open-im-sdk-android	Android version SDK	open-im-android-demo	Android sample
Flutter	open-im-sdk-flutter	Flutter version SDK	open-im-flutter-demo	Flutter sample
uni-app	open-im-sdk-uniapp	uni-app version SDK	open-im-uniapp-demo	uni-app sample
JS SDK	open-im-sdk-web-wasm	JS SDK version	open-im-pc-web-demo	PC web sample
React Native	open-im-sdk-reactnative	React Native SDK	open-im-reactnative-demo	React Native sample

🔍 Detailed about OpenIMServer

OpenIMServer has the following characteristics:

• 🧩 Made up of multiple modules, such as the gateway and several rpc services.
• 🌐 Microservice architecture, supports cluster mode.
• 🚀 Variety of deployment methods, like from source code, kubernetes or docker deployment.

🔗 OpenIMServer Repository Link

🌐 REST API

• OpenIMServer offers a REST API for business systems, aiming to provide more functionalities, like creating groups or sending push notifications via backend interfaces.

📞 Callback

• OpenIMServer provides callback capabilities to expand more business forms. In this context, a callback means that OpenIMServer will send a request to the business server either before or after a certain event, such as a callback before or after sending a message.