Hi, Server-Sent Events is a new HTML5 technology that is used to send data from a server to a client, over HTTP, on the initiative of the server. Here are some references: http://en.wikipedia.org/wiki/Server-sent_events http://dev.w3.org/html5/eventsource/ https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sen... Zinc-Server-Sent-Events is a proof of concept implementation with a small demo of Server-Sent Events for Zinc HTTP Components in Pharo. Usage in quite simple: you specify a handler object that implements a #run: method for each outgoing feed, like this run: connection "Using Server-Sent Events is simple: keep a reference to the connection, instanciate ZnServerSentEvent objects and use #writeOn: to push them out." | event status | [ status := self statusString. event := ZnServerSentEvent type: 'status-update' data: status. event writeOn: connection. 2 seconds asDelay wait ] repeat On the client side, a standard JavaScript listener will receive the incoming events. The package can be found here http://www.smalltalkhub.com/#!/~SvenVanCaekenberghe/ZincHTTPComponents/packa... Make sure to update Zinc itself to its bleedingEdge first. Sven -- Sven Van Caekenberghe http://stfx.eu Smalltalk is the Red Pill