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SSE (EventSource), with bidirectional emulation

SSE (EventSource) connection endpoint in Centrifugo is:


This transport is only implemented by our Javascript SDK at this point – as it mostly makes sense as a fallback for WebSocket to have real-time connection in an environment where WebSocket is unavailable. These days those envs are mostly corporate networks which can block WebSocket traffic (even TLS-based).



Boolean, default: false.

Enables SSE (EventSource) endpoint. And enables emulation endpoint (/emulation by default) to accept emulation HTTP requests from clients.

"sse": true


Default: 65536 (64KB)

Maximum allowed size of a initial HTTP POST request in bytes when using HTTP POST requests to connect (browsers are using GET so it's not applied).