issue 7571 - SSE - add Keep-Alive Messages definition #7572
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Issue #7571: Server-Sent Events (SSE) - add Keep-Alive Messages definition
"...authors can include a comment line (one starting with a ':' character) every 15 seconds or so."
This is helpful for SSE clients. The SSE client can read the keep-alive messages, and detect whether the connection is alive.
Thing is, since the keep-alive messages mechanism is not mandatory, the SSE client can use this condition only if the keep-alive mechanism is used, since when it is not used, it is a valid scenario that no message is received for a long time, even when the stream is alive.
Problem:
keep-alive message is not well-defined.
Suggested solution - added the part in bold:
authors can include a comment line (one starting with a ':' character) starting with ":keepalive" every 15 seconds or so.
This way, the SSE client can detect if keep-alive mechanism is used by checking if it received a keep-alive message as defined.
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