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Introducing ASP.NET
SignalR
Presenter: Richi Padhi, Mindfire Solutions
Date: 7/1/2015
Presenter: Richi Padhi, Mindfire Solutions
Agenda
Introduction
How SignalR works?
SignalR API & Architecture
Demo
Security
Presenter: Richi Padhi, Mindfire Solutions
Introduction
Presenter: Richi Padhi, Mindfire Solutions
Introduction
What is SignalR?
ASP.NET SignalR is a library for ASP.NET developers that simplifies the process of
adding real-time web functionality to applications.
Library to maintain asynchronous (non blocking threads) over persistent connection
in ASP.NET applications.
What is "real-time web" functionality?
Real-time web functionality is the ability to have server code push content to
connected clients instantly as it becomes available, rather than having the server
wait for a client to request new data.
Example : Chat, Email, Stock Ticker, Game Live Score, Real-Time Gaming, Document
Collaboration
Presenter: Richi Padhi, Mindfire Solutions
Introduction
>> SignalR provides a simple API for creating server-to-client remote
procedure calls (RPC) that call JavaScript functions in client browsers (and
other client platforms) from server-side .NET code.
>> SignalR also includes API for connection management (for instance,
connect and disconnect events), and grouping connections also it handles
connection management automatically.
>> It can reach out to thousands of clients using Service Bus, SQL Server or
Redis.
>> Abstracts away the network layer for bidirectional real-time
communications, thus helping developers focus on building application.
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
>> SignalR allows bidirectional communication between client & server over
persistant connections
>> It provides simple APIs for RPC
>> SignalR chooses the best fit transport mechanisms for the given client and
server environment.
>> Manages and gives fine grained control over network layer and also has
an auto fallback mechanism.
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Order of network transports
HTML 5 Transports :
>> WebSockets
>> Server Sent Events
Comet Transports (long-held HTTP request) :
>> Forever Frame
>> Ajax Long Polling
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
WebSockets
>> A new HTML5 API that enables bi-directional, full duplex communication
between the browser and server.
>> It is the new standard defined as a part of HTML 5 to solve two major problems
of current web:
Overhead of HTTP (Network Throughput)
Low Latency
>> Standardized
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Server Sent Event
>> A technology where a browser receives automatic updates from a server via
HTTP connection. The Server-Sent Events EventSource API is standardized as part
of HTML5
>> This was also possible before, but the web page would have to ask if any
updates were available. With server-sent events, the updates come automatically.
>> Supported in all major browsers, except Internet Explorer.
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Forever Frame
>> Forever Frame creates a hidden IFrame which makes a request to an endpoint
on the server that does not complete. The server then continually sends script to
the client which is immediately executed, providing a one-way realtime connection
from server to client.
>> The connection from client to server uses a separate connection from the
server to client connection, and like a standard HTML request, a new connection is
created for each piece of data that needs to be sent.
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Ajax Long Polling
>> Long polling does not create a persistent connection, but instead polls the
server with a request that stays open until the server responds, at which point the
connection closes, and a new connection is requested immediately.
>> This may introduce some latency while the connection resets.
Presenter: Richi Padhi, Mindfire Solutions
How SignalR Works?
Fallback
Presenter: Richi Padhi, Mindfire Solutions
SignalR API & Architecture
Presenter: Richi Padhi, Mindfire Solutions
SignalR API & Architecture
The SignalR API contains two models for communicating between clients and
servers: Persistent Connections & Hubs
Connection
A Connection represents a simple endpoint for sending single-recipient, grouped,
or broadcast messages.
Persistent Connections
>> Low level access to communication
>> Direct developer access to network pipeline
>> Access to lot more communication events
>> Will be familiar to developers who have used connection-based APIs such as
WCF
Presenter: Richi Padhi, Mindfire Solutions
SignalR API & Architecture
Hubs
>> High level abstraction
>> Built on top of Persistent Connections
>> Least developer work
>> Works for majority of user
>> Will be familiar to developers who have used remote invocation APIs such as
.Net Remoting.
Presenter: Richi Padhi, Mindfire Solutions
SignalR API & Architecture
Architecture
Presenter: Richi Padhi, Mindfire Solutions
Demo
Presenter: Richi Padhi, Mindfire Solutions
Demo
>> First SignalR application
>> SignalR Hub and jQuery Demo
Presenter: Richi Padhi, Mindfire Solutions
Security
Presenter: Richi Padhi, Mindfire Solutions
Security
Presenter: Richi Padhi, Mindfire Solutions
Security
Presenter: Richi Padhi, Mindfire Solutions
References
http://www.asp.net/signalr
http://signalr.net/
http://www.pluralsight.com/courses/signalr-across-web-devices
https://github.com/SignalR/SignalR/wiki
Presenter: Richi Padhi, Mindfire Solutions
Question and
Answer
Presenter: Richi Padhi, Mindfire Solutions
Thank you ! :)

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Intro to signalR

  • 1. Introducing ASP.NET SignalR Presenter: Richi Padhi, Mindfire Solutions Date: 7/1/2015
  • 2. Presenter: Richi Padhi, Mindfire Solutions Agenda Introduction How SignalR works? SignalR API & Architecture Demo Security
  • 3. Presenter: Richi Padhi, Mindfire Solutions Introduction
  • 4. Presenter: Richi Padhi, Mindfire Solutions Introduction What is SignalR? ASP.NET SignalR is a library for ASP.NET developers that simplifies the process of adding real-time web functionality to applications. Library to maintain asynchronous (non blocking threads) over persistent connection in ASP.NET applications. What is "real-time web" functionality? Real-time web functionality is the ability to have server code push content to connected clients instantly as it becomes available, rather than having the server wait for a client to request new data. Example : Chat, Email, Stock Ticker, Game Live Score, Real-Time Gaming, Document Collaboration
  • 5. Presenter: Richi Padhi, Mindfire Solutions Introduction >> SignalR provides a simple API for creating server-to-client remote procedure calls (RPC) that call JavaScript functions in client browsers (and other client platforms) from server-side .NET code. >> SignalR also includes API for connection management (for instance, connect and disconnect events), and grouping connections also it handles connection management automatically. >> It can reach out to thousands of clients using Service Bus, SQL Server or Redis. >> Abstracts away the network layer for bidirectional real-time communications, thus helping developers focus on building application.
  • 6. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works?
  • 7. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? >> SignalR allows bidirectional communication between client & server over persistant connections >> It provides simple APIs for RPC >> SignalR chooses the best fit transport mechanisms for the given client and server environment. >> Manages and gives fine grained control over network layer and also has an auto fallback mechanism.
  • 8. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works?
  • 9. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? Order of network transports HTML 5 Transports : >> WebSockets >> Server Sent Events Comet Transports (long-held HTTP request) : >> Forever Frame >> Ajax Long Polling
  • 10. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? WebSockets >> A new HTML5 API that enables bi-directional, full duplex communication between the browser and server. >> It is the new standard defined as a part of HTML 5 to solve two major problems of current web: Overhead of HTTP (Network Throughput) Low Latency >> Standardized
  • 11. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? Server Sent Event >> A technology where a browser receives automatic updates from a server via HTTP connection. The Server-Sent Events EventSource API is standardized as part of HTML5 >> This was also possible before, but the web page would have to ask if any updates were available. With server-sent events, the updates come automatically. >> Supported in all major browsers, except Internet Explorer.
  • 12. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? Forever Frame >> Forever Frame creates a hidden IFrame which makes a request to an endpoint on the server that does not complete. The server then continually sends script to the client which is immediately executed, providing a one-way realtime connection from server to client. >> The connection from client to server uses a separate connection from the server to client connection, and like a standard HTML request, a new connection is created for each piece of data that needs to be sent.
  • 13. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? Ajax Long Polling >> Long polling does not create a persistent connection, but instead polls the server with a request that stays open until the server responds, at which point the connection closes, and a new connection is requested immediately. >> This may introduce some latency while the connection resets.
  • 14. Presenter: Richi Padhi, Mindfire Solutions How SignalR Works? Fallback
  • 15. Presenter: Richi Padhi, Mindfire Solutions SignalR API & Architecture
  • 16. Presenter: Richi Padhi, Mindfire Solutions SignalR API & Architecture The SignalR API contains two models for communicating between clients and servers: Persistent Connections & Hubs Connection A Connection represents a simple endpoint for sending single-recipient, grouped, or broadcast messages. Persistent Connections >> Low level access to communication >> Direct developer access to network pipeline >> Access to lot more communication events >> Will be familiar to developers who have used connection-based APIs such as WCF
  • 17. Presenter: Richi Padhi, Mindfire Solutions SignalR API & Architecture Hubs >> High level abstraction >> Built on top of Persistent Connections >> Least developer work >> Works for majority of user >> Will be familiar to developers who have used remote invocation APIs such as .Net Remoting.
  • 18. Presenter: Richi Padhi, Mindfire Solutions SignalR API & Architecture Architecture
  • 19. Presenter: Richi Padhi, Mindfire Solutions Demo
  • 20. Presenter: Richi Padhi, Mindfire Solutions Demo >> First SignalR application >> SignalR Hub and jQuery Demo
  • 21. Presenter: Richi Padhi, Mindfire Solutions Security
  • 22. Presenter: Richi Padhi, Mindfire Solutions Security
  • 23. Presenter: Richi Padhi, Mindfire Solutions Security
  • 24. Presenter: Richi Padhi, Mindfire Solutions References http://www.asp.net/signalr http://signalr.net/ http://www.pluralsight.com/courses/signalr-across-web-devices https://github.com/SignalR/SignalR/wiki
  • 25. Presenter: Richi Padhi, Mindfire Solutions Question and Answer
  • 26. Presenter: Richi Padhi, Mindfire Solutions Thank you ! :)