centrifugal/centrifugo v6.9.1

on GitHub

Centrifugo is an open-source scalable real-time messaging server. It instantly delivers messages to application online users connected over supported transports (WebSocket, HTTP-streaming, Server-Sent Events (SSE), GRPC, WebTransport). Centrifugo is built around channel subscriptions – 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, AI streaming responses, 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.

Official client SDKs are available for JavaScript (browser, Node.js, React Native), Dart/Flutter, Swift, Java, Python, Go, and .NET. In addition, Centrifugo supports a unidirectional approach for simple use cases with no SDK dependency.

For details, go to the Centrifugo documentation site. For runnable demos see centrifugal/examples.

What's changed

Improvements

• Possibility to choose color accents in admin web UI.

Fixes

• Admin web UI: add previously missing API commands to the web UI – map API (map_publish, map_remove, map_read_state, map_read_stream, map_stats, map_clear), shared poll API, etc. – and update the embedded web UI (#1184, commit 3fc933d9).
• Fix a WARN log about a missing dev key on start – some options and flags left over from the dev page removed in v6.9.0 were not fully cleaned up (#1185, commit 8cee857f).
• Admin: drop the undocumented and unused fallback that read the admin auth token from a token URL query parameter – the token must be supplied via the Authorization header (#1187, commit bc33546f). Addresses GHSA-v4h4-9j4c-ghgp
• Removed an unused map ordered option (#1186, commit 8752f242).

Miscellaneous

• Docs: expanded the load balancing chapter with configs for Envoy, Caddy, and Traefik (in addition to Nginx and HAProxy) – all validated in a playground running two nodes behind each proxy across every transport (WebSocket, HTTP streaming, SSE) over plaintext and TLS, up to 10k connections.
• Docs: added interactive widgets throughout the documentation to clarify concepts where newcomers get confused most – for example the connection JWT explorer, subscription JWT explorer, channel resolver, subscribe permission model, and interactive proxy explorer.
• This release is built with Go 1.26.5
• Dependency updates
• See also the corresponding Centrifugo PRO release.