https://zbrad.github.io/tags/aspnetcore/Recent content in Aspnetcore on ZBrad's BlogHugoen-usThu, 28 Jul 2016 00:00:00 -0700https://zbrad.github.io/tools/wscore/Thu, 28 Jul 2016 00:00:00 -0700https://zbrad.github.io/tools/wscore/<p>An example of creating and using a WebSocket with the new ASP.NET Core. The example code is available on GitHub <a href="https://github.com/zbrad/wsweb">here</a>.</p> <h1 id="background">Background</h1> <p>WebSockets were introduced as part of the draft HTML5 specification in 2008, and the first browser to provide support was Google Chrome in 2009.</p> <p>At this time (July 2016), the following browsers fully support the WebSocket standard (<a href="https://tools.ietf.org/html/rfc6455">RFC 6455</a>):</p> <ul> <li>Internet Explorer 10</li> <li>Firefox 11 (PC,Android)</li> <li>Chrome 16 (PC,Mobile)</li> <li>Safari 6 (Mac,iOS)</li> <li>Opera 12.10 (PC,Mobile)</li> <li>Android Browser 4.4</li> </ul> <h2 id="websockets">Websockets</h2> <p>Unlike the HTTP protocol, a WebSocket provides fully bi-directional (full-duplex) communication, enabling a event based model of programming using a message passing protocol. Since there is not the constant overhead of re-establishing the connection, the passing of multiple small messages is extremely efficient and lends itself well to client/service interactions with low latency.</p>