v5.2.1

Centrifugo is an open-source scalable real-time messaging server. Centrifugo can instantly deliver messages to application online users connected over supported transports (WebSocket, HTTP-streaming, SSE/EventSource, GRPC, SockJS, WebTransport). Centrifugo has the concept of a channel – so it's a user-facing PUB/SUB server.

Centrifugo is language-agnostic and can be used to build chat apps, live comments, multiplayer games, real-time data visualizations, collaborative tools, etc. in combination with any backend. It is well suited for modern architectures and allows decoupling the business logic from the real-time transport layer.

Several official client SDKs for browser and mobile development wrap the bidirectional protocol. In addition, Centrifugo supports a unidirectional approach for simple use cases with no SDK dependency.

For details, go to the Centrifugo documentation site.

What's changed

Improvements

• Support for OKP JWKs based on Ed25519, #756
• New boolean option global_redis_presence_user_mapping to drastically improve presence stats performance for channels with large number of active subscribers when using Redis engine. See #750 for the motivation and implementation details. Also, see in docs
• Admin web UI now uses /admin/api/settings endpoint on start to load admin UI configuration options. Admin web UI status page now does not call info API periodically when browser window is not visible (using visibility browser API). Also, some minor CSS style improvements were made.

Fixes

• Fix nil pointer dereference upon channel regex check inside namespace, #760

Misc

• Release is built using Go v1.21.6
• Use grouped dependabot version updates by @j178, #762