I believe the semantics can be simplified as this:
* the server (clj) can disconnect at any time
* the client (cljs) has the responsibility of
(1) informing the user
(2) reconnecting
(3) figuring out what went wrong
in such events
I believe this is both necessary and sufficient.
It's sufficient in that a dropped network connection can be viewed as
"server decided to disconnect."
It's also necessary in that -- if we want defensive programming and to
avoid DOS attacks by malicious clients, it's important for the server to,
at some point, say "F U client, you're out of tokens; I'm disconnecting
you" or to say "F U client, I can't send data to you; I'm disconnecting
you."
This is not CSP semantics, but I believe it's both necessary and sufficient
for having "core.async" across the network -- the semantics being
* the server can, at any time, arbitrary disconnect a client
* it's the client's job to inform the user / try to reconnect
On Sat, Jan 25, 2014 at 3:17 PM, Michał Marczyk <[email protected]>wrote:
> If the application is structured in such a way that messages from the
> other side of the client/server divide are put on channels upon
> arrival, which seems to be a reasonable idea, why not encapsulate the
> connection-handling logic in a black box exposing a (bunch of)
> channel(s)?
>
> On 26 January 2014 00:01, Patrick Logan <[email protected]> wrote:
> > This seems like more trouble than it is worth. There are almost
> certainly suitable but more established protocols and implementations for
> the problem at hand. Anyway, maybe it's worth exploring. To me it seems to
> muddy the waters for what core.async seems intended to provide, which seems
> to me to be fairly straight-forward CSP.
> >
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