This document discusses ASP.NET SignalR, a framework for adding real-time web functionality to applications. SignalR can be used to enable continuously updated data and real-time features. It works across different browsers and devices by utilizing multiple transport mechanisms like websockets, server-sent events, and long polling. SignalR provides a simple programming model and supports high throughput, large-scale applications through its ability to scale out to multiple servers.

1. Pranav Rastogi
Program Manager
Microsoft
Twitter : rustd
ASP.NET SignalR
Real time web made simple

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ASP.NET SIGNALR
INTRODUCTIONS
Author

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ASP.NET SIGNALR
WHAT IS ASP.NET SIGNALR?

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ASP.NET SIGNALR

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HOW CAN I USE REAL-TIME IN MY APP?

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ASP.NET SIGNALR

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REACH
PERFORMANCE

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SIMPLICITY: TWO-LEVEL API
Low level
Raw strings up & down
Broadcast to all clients, groups or individuals
Connection, reconnect & disconnect semantics
Built on top of connections
RPC from client-server *AND* server-client
Automatic client proxy generation (JavaScript)

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ASP.NET SIGNALR

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CONNECTION LIFETIME

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SIMPLICITY
REACH
PERFORMANCE

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REACH: BUT WHAT ABOUT WEBSOCKETS?
WebSockets works if…
You use ASP.NET 4.5 on Windows Server
2012 AND
Client uses IE10 or latest Chrome, FF, Safari
AND
Your load balancer/reverse proxy supports
it AND
Client proxy server/NAT supports it AND
Everybody between client & server
supports it AND
You’re happy coding against raw sockets
AND
You manage scale-out yourself
SignalR works…
Everywhere
We’ll try WebSockets then fallback to:
• Server Sent Events
• Forever Frame
• Long Polling
We give you a simple & powerful API to
work with
We do our best to keep the logical
connection up, including retry logic if
transports fail
We scale-out to web-farms

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REACH: CLIENTS FOR EVERYBODY!
Right now
JavaScript (jQuery)
.NET 4.0/4.5
Silverlight 5
Windows Store apps
Windows Phone 8
Portable Class Library
MonoTouch
MonoDroid
In the future
C++
Pure JavaScript (no jQuery)
iOS native
Java
.NET Micro Framework
…

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SIMPLICITY
REACH
PERFORMANCE

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PERFORMANCE: THROUGHPUT & SCALE
Very high performance on a single box
100,000’s of messages per second
Very low memory overhead
Fully async to optimize resource utilization
1,000’s of connections per server
Supports horizontal scale-out using a pluggable message bus backplane
(Azure Service Bus, Redis, SQL)

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SCALE-OUT
web nodes
clients
backplane

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THERE’S MORE…
Run it in your ASP.NET application or standalone with self-host on OWIN
Run it on OSX or Linux with Mono
#1 watched C# repo on GitHub
Supported part of the ASP.NET family
www.asp.net/signalr

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RELATED CONTENT
 ASP.NET Identity & Security
 Introduction to .NET Web Development
on Azure
 Microsoft ASP.NET, Web, and Cloud Tools
Preview

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THANK YOU!!!