whassaname at gmail.com
Wed Mar 30 22:28:53 AEDT 2011
On 30 March 2011 20:38, Kim Holburn <kim at holburn.net> wrote:
WebSockets-like functionality has definitely been around for some time...
For example Exchange Activesync (aka EAS) which is the push-email
protocol used by Exchange, iPhone, Android, Windows Phone, etc was
introduced around 2005.
EAS uses an extended time-out HTTPS session so that the client
maintains a connection to the Exchange Server, which can then
instantly respond to the already-open session when new email arrives.
Because the client is listening but not sending any traffic until the
timeout, there is no excess bandwidth consumption.
It's not WebSockets - but to the end-user it's the same effect.
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