AnyCable

AnyCable is an open-source realtime server designed to facilitate reliable two-way communication between application backends and client devices. It functions as a specialized server component that manages persistent connections using WebSockets and Server Sent Events (SSE), ensuring that data can be pushed from the server to the client without the need for constant polling.

The software is deployed as part of a larger API infrastructure, acting as a proxy that handles the lifecycle of long-lived connections. By offloading the management of these connections to a dedicated server, the application backend does not need to maintain a stateful connection for every active user. This allows the backend to remain stateless and process requests via standard protocols while AnyCable maintains the actual socket connection with the end user.

Key features

• Support for the WebSocket protocol for full duplex communication
• Support for Server Sent Events (SSE) for one-way data streaming
• Reliable delivery of real-time messages to connected clients
• Management of thousands of concurrent persistent connections
• Decoupling of connection handling from application business logic
• Integration capabilities with various backend API frameworks
• Open source distribution under the MIT License

This architecture is specifically intended for developers who need to scale real-time features without overloading their primary application servers. Because AnyCable handles the connection overhead, the backend can be scaled horizontally using standard load balancing techniques. It is suitable for a variety of use cases, including live chat applications, real-time collaborative tools, and notification systems where low latency is a requirement. The system ensures that the backend only interacts with the server when there is actual data to be sent or received, reducing the memory footprint of the application layer.

AnyCable serves as a dedicated infrastructure layer for managing high-concurrency realtime traffic in distributed web environments.