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
- Option to extract client connection user ID from HTTP header #730. See documentation for it.
- Speed up channel config operations by using atomic.Value and reduce allocations upon channel namespace extraction by using channel options cache, #727
- New metrics for the size of messages sent and received by Centrifugo real-time transport. Transport messages metrics also include
frame_typeresolution. Finally all the metrics exposed by Centrifugo are described in docs - see Server observability -> Exposed metrics
Fixes
- Fix
Lua redis lib command arguments must be strings or integers scripterror when calling Redis reversed history and the stream metadata key does not exist, #732 - Fix Centrifugo logo image link in our Grafana dashboard - new revision uploaded
Misc
- Dependencies updated (rueidis, quic-go, etc)
- Improved logging for bidirectional emulation transports and unidirectional transports - avoid unnecessary error logs
- If you represent a business and using Centrifugo - see also the release of Centrifugo PRO v5.1.1