[undertow-dev] Server-Sent Event: support of retry reconnection time

[Cédric Tran-Xuan]

Hello,
We are using the Undertow SSE support.
In the SSE spec, it is possible to send a "retry: <time in milliseconds>"
that tells the client to try a reconnection after a certain amount of time (
https://html.spec.whatwg.org/multipage/comms.html#concept-event-stream-reconnection-time
).
Right now, we haven't found the ability to send the "retry" via the
Undertow API.

If we look at the ServerSentEventConnection class, you can only send an
event, an id and a data.

So, is it a missing feature or is there a way, we may have missed, to send
the "retry"?

Thanks in advance for the answer!
Best regards,

Cédric.
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