🚀 OpenIM: An Open Source Instant Messaging SDK Solution

OpenIM consists of two main components: OpenIMSDK and OpenIMServer. Its main features are as follows:

📦 OpenIMSDK

• Embedded directly into applications as a library file.

🖥️ 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 functionality. This means it is not a complete IM product.

📘 Detailed Explanation of OpenIMSDK

OpenIMSDK is an IM SDK designed for OpenIMServer, specifically created for embedding in client applications. Its main functions and technical features are as follows:

🌟 Key Features:

• 📦 Local Storage
• 🔔 Listener Callbacks
• 🛡️ API Encapsulation
• 🌐 Connection Management

📚 Main Modules:

1. 🚀 Initialization and Login
2. 👤 User Management
3. 👫 Friend Management
4. 🤖 Group Functions
5. 💬 Session Handling

🔧 Technical Implementation:

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

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

🔍 Detailed Explanation of OpenIMServer

OpenIMServer has the following features:

• 🧩 Composed of multiple modules, such as gateway and multiple rpc services.
• 🌐 Microservice architecture, supporting cluster mode.
• 🚀 Various deployment methods, such as source code, Kubernetes, or Docker deployment.

🔗 OpenIMServer Repository Link

🌐 REST API

• OpenIMServer provides REST APIs for business systems, enabling more functionalities like creating groups and sending push messages through backend interfaces.

📞 Callback

• OpenIMServer offers callback capabilities to extend more business forms. Callbacks refer to OpenIMServer sending requests to business servers before or after certain events, like before or after sending a message.

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