I haven't been following outbound closely for awhile now. I hope I
haven't just overlooked the answer to this question.
I recently received a question about implementing the ping/pong
mechanism from outbound. So I went and looked to see exactly what the
definition was. I come away having some questions:
Must a ping always be responded to with a pong? Or is the ping just
there to solicit *some* response? Namely, if when the ping is received
there is other output going on the connection, must a pong still be
sent? (It will have to be when the is a message break of course.) It
would seem that the presence of output is sufficient evidence that the
connection is alive. (If the pong is required, then I guess we will have
to hope that it doesn't take 10 seconds to send the current message that
is going out. Normally that shouldn't be a problem.)
And, must the be a matching pong for every ping? If several pings are
received before it is possible to send a pong, must a corresponding
number of pongs be sent? Or only one? If I have received two pings
before I can send pong, and I am required to send two pongs, then that
will look like a ping. That would seem to be bad.
Or is it illegal to send multiple pings before receiving a pong?
Thanks,
Paul
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