SignalR Overview
- 1. SignalR Overview: How Web Pages can get all the Real- time Fun?
- 2. • Overview of ASP.NET SignalR • How SignalR can be used for realtime communications Agenda
- 3. What is ASP.Net SignalR? Real-time, persistent connection abstraction over HTTP for .NET Largest followed C# repo on GitHub Simple and powerful API’s Many techniques use to keep the logical connection up, including retry logic if transports fail Scale-out to web-farms using backplanes
- 5. Yeah, dude!
- 6. SignalR Connections Many techniques used to maintain connection • WebSockets • bidirectional stream • Server Sent Events • Push notifications from server to browser using DOM events • Forever Frame • uses HTTP 1.1 chunked encoding to establish a single long-lived HTTP connection in a hidden iframe • Internet Explorer only • Long Polling • hit the server hit the server hit the server hit the server hit server and hope something comes back with data
- 8. Transport Internet Explorer Chrome (Windows or iOS) Firefox Safari (OSX or iOS) Android WebSockets 10+ current - 1 current - 1 current - 1 N/A Server-Sent Events N/A current - 1 current - 1 current - 1 N/A ForeverFrame 8+ N/A N/A N/A 4.1 Long Polling 8+ current - 1 current - 1 current - 1 4.1
- 11. PersistentConnection And Hub The two primary components in SignalR are hubs and persistent connections. Connection persistence is how the server can communicate with one or more clients. The vehicle to communicate with clients is a hub.
- 13. PersistentConnection - Easiest implementation - Has to have message type embed in the payload to support different types of messages with different payloads. Hub – RPC over a connection - Allows call methods on the client from the server and from the server to the client - Allows to pass strongly typed parameters to methods PersistentConnection Vs Hub
- 15. Backplane
- 16. Scale-Out Three options for deploying backplane - Service Bus - SQL Server - Redis Open source in memory database that persists on disk Requires libraries from the GitHub project currently not in Microsoft SignalR
- 17. SignalR Demo
- 19. Resources ASP.NET SignalR http://signalr.net http://www.asp.net/signalr BUILD http://www.buildwindows.com/ 3-034 - Building Real-time Web Apps with ASP.NET SignalR
Editor's Notes
- #4: Local context Access to the file system and devices, and can make cross-domain HTTP requests Web context Externally downloaded code Must use iframe element
- #7: Local context Access to the file system and devices, and can make cross-domain HTTP requests Web context Externally downloaded code Must use iframe element
- #9: More details on all supported platforms - http://www.asp.net/signalr/overview/getting-started/supported-platforms
- #10: More details on all supported platforms - http://www.asp.net/signalr/overview/getting-started/supported-platforms