You can do it with javascript, using:

Api navigador:
https://developer.mozilla.org/en-US/docs/Online_and_offline_events#Overview

https://developer.mozilla.org/en-US/docs/Online_and_offline_events#Overview
Em sexta-feira, 2 de dezembro de 2016 15:11:08 UTC-3, Ramos escreveu:
>
> What could be the best way to check if a user is disconnects?
>
> I was thinking of  this
>
>      <script type="text/javascript">
>        $(document).ready(function()
> {
>     $(window).bind("beforeunload", function() { 
> *        call a controller function to set the user as offline*
>     });
> });
>      </script>
>
> but this is not perfect because when the user moves to another URL inside 
> the same app this event keeps getting triggered on url change.
> Any better ideas?
>
>
> Regards
> António
>

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