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...Built-in protocols: plain TCP/UDP, HTTP, MQTT, Websocket. SSL/TLS support: mbedTLS, OpenSSL or custom (via API). Used to solve a wide range of business needs, like implementing Web UI interface on devices, RESTful API services, telemetry data exchange, remote control for a product, remote software updates, remote monitoring, and others.
JSON-RPC 2.0 implementation over WebSockets for Node.js
The rpc-websockets library enables developers to easily implement their business logic that includes messaging between users, machines or any devices. It provides a possibility to send and receive JSON data through the WebSocket communication protocol in order to support two-way notification push, running RPC methods and firing any types of event signalling. Only clients can call RPC methods and not vice versa at the moment. Both frontend (HTML/JS-based) and backend (Node.js-based) development environments are supported.
...Send arbitrary Clojure vals over edn or Transit (JSON, MessagePack, etc.). Make-channel-socket! and you're good to go. Automatic, sensible support for users connected with multiple clients and/or devices simultaneously. Realtime info on which users are connected over which protocols (v0.10.0+). Flexible model: use it anywhere you'd use WebSockets/Ajax/Socket.IO, etc. Standard Ring security model: auth as you like, HTTPS when available, CSRF support, etc. Fully documented, with examples. Small codebase: ~1.5k lines for the entire client+server implementation.