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html 5 websocketsFlorin Cardașim, twitter.com/@cardasimEndava26 nov 2011
Agenda Real-time web         SSE,                Q&A                       WebSockets        Demo:                  Demo: ...
How do we implement real-timeweb?periodic ajax pollingcomet/long polling/http streaming …flash/javafx/silverlighthtml5...
PollingBrowser    connect   Server           no           message           connect           no                      even...
PollingNo real-time user experienceWasted bandwidth, most requests return no dataFrequent polling determine high server...
Comet/long pollingBrowser                      Server           connect                      wait                         ...
Comet/long pollingReal-time user experienceHigh number of clients determines high pressure on bandwidth, memory, threads...
Html5 server-sent eventsBrowser                           Server              open event stream  <EventSource>            ...
Html5 server-sent eventsSimulates a server push channel over HTTPUnidirectional, from server to browserStandardizes som...
Html5 WebSockets                  GET /text HTTP/1.1Client/Browser    Upgrade: WebSocket                                  ...
Html5 WebSocketsFull duplex, bidirectionalSingle TCP socketStandard ports: http/80, https/443Bandwidth savingsHigher ...
Server side support Socket.IO (node.js)              Socket.IO Fallbacks Jetty (Java)                        Adobe Fla...
Browser support
DEMO: WebSockets@MicrosoftASP.NET 4.5WCF 4.5Windows 8 Developer PreviewIIS 8ASP.NET 4.5WCF 4.5IE 10, Chrome
WebSockets @Microsoft                      Your code!           WCF high level            abstractions                    ...
Referenceswww.websocket.orgwww.paulbatum.comwww.kaazing.mewww.html5labs.comwww.buildwindows.comwww.google.com/search...
Q&A
Please fill your evaluation formThank you!Florin Cardașim, twitter.com/@cardasimEndava26 nov 2011
WebSockets vs Polling bandwidth http://websocket.org/quantum.html
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Codecamp Iasi-26 nov 2011 - Html 5 WebSockets

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http://codecamp.ro/post/2011/12/02/Codecamp-de-toamna-la-Iasi-2011-dupa-eveniment.aspx

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Transcript of "Codecamp Iasi-26 nov 2011 - Html 5 WebSockets"

  1. 1. html 5 websocketsFlorin Cardașim, twitter.com/@cardasimEndava26 nov 2011
  2. 2. Agenda Real-time web SSE, Q&A WebSockets Demo: Demo: WebSockets in long polling Windows 8, ASP.NET & WCF 4.5
  3. 3. How do we implement real-timeweb?periodic ajax pollingcomet/long polling/http streaming …flash/javafx/silverlighthtml5 server-sent eventshtml5 web sockets
  4. 4. PollingBrowser connect Server no message connect no event message connect event connect no message connect no event message connect event
  5. 5. PollingNo real-time user experienceWasted bandwidth, most requests return no dataFrequent polling determine high server loads
  6. 6. Comet/long pollingBrowser Server connect wait event event connect wait event event connect wait
  7. 7. Comet/long pollingReal-time user experienceHigh number of clients determines high pressure on bandwidth, memory, threads/processesDEMO
  8. 8. Html5 server-sent eventsBrowser Server open event stream <EventSource> event event onmessage event event onmessag e event event onmessag e
  9. 9. Html5 server-sent eventsSimulates a server push channel over HTTPUnidirectional, from server to browserStandardizes some form of Comet/http streamingNew html tag: <EventSource>New mime type: text/event-stream
  10. 10. Html5 WebSockets GET /text HTTP/1.1Client/Browser Upgrade: WebSocket Server Connection: Upgrade Host: www.websocket.org ... HTTP/1.1 101 WebSocket Protocol Handshake Upgrade: WebSocket ... TCP comm channel Full duplex, bidirectional
  11. 11. Html5 WebSocketsFull duplex, bidirectionalSingle TCP socketStandard ports: http/80, https/443Bandwidth savingsHigher scalability comparing with CometIn&outside of browserIETF WebSockets Communication protocolW3C WebSockets API
  12. 12. Server side support Socket.IO (node.js)  Socket.IO Fallbacks Jetty (Java)  Adobe Flash Socket Ruby/EventMachine  AJAX Long Polling Python/Twisted  AJAX Multipart Streaming Windows 8, IIS 8, ASP.NET-WCF 4.5  Forever iFrame … others  JSONP Polling http://socket.io/
  13. 13. Browser support
  14. 14. DEMO: WebSockets@MicrosoftASP.NET 4.5WCF 4.5Windows 8 Developer PreviewIIS 8ASP.NET 4.5WCF 4.5IE 10, Chrome
  15. 15. WebSockets @Microsoft Your code! WCF high level abstractions ASP.NET high levelWCF WebSocket transport abstractions System.Net.WebSockets ASP.NET HTTP Pipeline HttpListener IIS (iiswsock.dll) http.sys
  16. 16. Referenceswww.websocket.orgwww.paulbatum.comwww.kaazing.mewww.html5labs.comwww.buildwindows.comwww.google.com/search?q=websocket
  17. 17. Q&A
  18. 18. Please fill your evaluation formThank you!Florin Cardașim, twitter.com/@cardasimEndava26 nov 2011
  19. 19. WebSockets vs Polling bandwidth http://websocket.org/quantum.html
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