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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.
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Bec pelc+2010+-+science+and+health
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GEOLOGICAL - MINING EXPLORATION
RS-GEOIMAGE specializes in the field of remote sensing,
processing of satellite imagery and GIS.
Providing consulting services and advice on the acquisition,
analysis and interpretation of satellite data.
Our continuing research has allowed us to obtain great
achievements in the identification and mapping of useful minerals
in mining exploration.
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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