Re: Call client method from server

On Wed, Mar 16, 2016 at 7:26 AM, Greg <grz3gorz.nowak@gmail.com> wrote:
> Don't forget about EventSource / Server Sent Events.
>
> Browser support: http://caniuse.com/#search=eventsource
> There are polyfills for IE/Edge: https://github.com/Yaffle/EventSource
> (there are other mentioned in README.md)
>
> The advantage over websockets is that it uses plain http connection, just
> long lived and managed by the browser itself (do not mistake it for long
> polling). That means it should not be affected by firewalls.

We ended up having to use a combination of technologies for all the
browsers we need to support. So we use

* Periodic & Long Polling: Just HTTP(S) so works in all browsers
across all intermediaries. See
https://github.com/realityforge/gwt-webpoller
* EventSource / Server Sent Events: Faster than polling, works in a
lot of browsers. See https://github.com/realityforge/gwt-eventsource
* Web Sockets: Fastest and easiest to use programatically but least
compatible. See https://github.com/realityforge/gwt-websockets

HTH,

Peter Donald

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