Realtime web open house
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This document discusses SignalR, an open source library for ASP.NET developers building real-time web functionality. SignalR provides a simple API for adding real-time web functionality to applications, abstracting how real-time connections are established and messages transferred so that it works across technologies like web sockets, forever frames and server-sent events. It supports self-hosting, scaling out, and has clients for .NET, JavaScript and other platforms. SignalR can be used to call client methods from the server and vice versa, enabling two-way communication applications.
Realtime web open house
- 1. © Copyright SELA software & Education Labs Ltd. 14-18 Baruch Hirsch St.Bnei Brak 51202 Israel www.sela.co.il
- 2. What is “Real Time” experience “Real Time” web techniques What is signalR SignalR protocol Connection & Hub Groups and private messages .Net client Self Hosting Scaleout
- 8. Web Socket Request TCP Socket ServerClient
- 10. • Not all servers support web sockets • Not all network components support web sockets • Its API is limited
- 11. • Code once, deploy everywhere • As cross-platform as possible • Simple API to work with
- 12. • Open source project • Abstraction layer over connection technique • Can be self-hosted • Call client methods from the server Polling ForeverFrames Long-Polling ServerSentEvents WebSocket =
- 13. WebSocket • Good performance • Strict prerequisites • Limited API SignalR • Abstraction layer • Rich API • Supports WebSocket
- 15. Negotiate request Negotiate response Connection phase Client Server
- 17. • WebSocket-like API • Lower level code • Provides us with more control
- 19. • Abstraction over signalR connection • Service-like API • Call clients methods from the server
- 21. • You can use connection ID • You can access a particular client by it Clients.Client(connectionId).sendMessage(message)
- 22. • Part of Hub API • Stored on client • Not persistent
- 24. _connection = new HubConnection("http://localhost/RanWahle.Blog.SignalR.Demo"); IHubProxy proxy = connection.CreateHubProxy("soccerResultsHub"); _connection.Start().ContinueWith( //define proxies ); //invoke server methods _proxy.Invoke(“HubServerMethod“ , args…));
- 26. • Three NuGet packages to install • Create class with Configuration method. • Map hub in the Configuration method • Use the class as a type parameter to WebApplication.Start
- 28. • signalR supports ASP.NET authentication & authorization • AuthorizeAttribute • Accessing user data from context • Authenticated request may downdgrade to serverSentEvents in some clients.
- 30. • Install Microsoft.AspNet.SignalR.SqlServer nuget • Add One line of code • Your app is ready to scaleout
- 32. Real time experience is more than just polling Using signalR can use the best available technique It can be self hosted It can scale out It has several clients
- 34. • http://www.asp.net/signalr • http://signalr.net/ • Twitters:@signalr @DamianEdwards @davidfowl and @DavianFowlwards • http://blogs.Microsoft.co.il/blogs/ranw
- 36. © Copyright SELA software & Education Labs Ltd. 14-18 Baruch Hirsch St.Bnei Brak 51202 Israel www.sela.co.il