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SignalR Real-time Application Cookbook

SignalR Real-time Application Cookbook

By : Roberto Vespa
4.6 (9)
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SignalR Real-time Application Cookbook

SignalR Real-time Application Cookbook

4.6 (9)
By: Roberto Vespa
Buy this Book

Overview of this book

Table of Contents (18 chapters)
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SignalR Real-time Application Cookbook
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SignalR Real-time Application Cookbook
Credits
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Credits
About the Author
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About the Author
Acknowledgments
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Acknowledgments
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Understanding the Basics
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Understanding the Basics
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Introduction
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Adding a Hub to an ASP.NET project
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Adding a Hub to a self-hosting application
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Connecting to a Hub from a JavaScript client
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Connecting to a Hub from a .NET application
2
Using Hubs
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Using Hubs
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Introduction
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Adding a method to a Hub and counting the calls to it
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Calling back the caller from a Hub's method
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Broadcasting to all connected clients
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Adding a connection to a group
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Removing a connection from a group
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Broadcasting to all connected clients except the caller
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Broadcasting to all clients except the specified ones
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Broadcasting to all clients in a group except the caller
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Broadcasting from outside a Hub
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Using the return value of a Hub method
3
Using the JavaScript Hubs Client API
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Using the JavaScript Hubs Client API
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Introduction
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Starting a Hub connection
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Setting up connection transport strategies
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Calling a server-side Hub method
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Adding a client-side method on the proxy and calling it from the server
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Managing errors across a complex asynchronous workflow
4
Using the .NET Hubs Client API
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Using the .NET Hubs Client API
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Introduction
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Starting a Hub connection
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Setting up connection transport strategies
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Calling a server-side Hub method
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Adding a client-side method on the proxy and calling it from the server
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Managing errors across a complex asynchronous workflow
5
Using a Persistent Connection
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Using a Persistent Connection
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Introduction
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Adding and registering a persistent connection
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Sending messages from the server
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Sending messages to the server
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Exchanging messages between a server and a JavaScript client
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Exchanging messages between a server and a .NET client
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Handling Connections
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Handling Connections
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Introduction
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Controlling the lifetime of a connection
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Handling a connection transient state
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Establishing a cross-domain connection
7
Analyzing Advanced Scenarios
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Analyzing Advanced Scenarios
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Introduction
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Generating static files for JavaScript proxies
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Authorizing requests on a Hub
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Authorizing requests on a persistent connection
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Authorizing requests in a self-hosting context
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Scaling up
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Scaling out with Azure
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Scaling out with Redis
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Scaling out with SQL Server
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Establishing proxy-less connections
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Introducing dependency injection (simple approach)
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Introducing dependency injection (advanced approach)
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Using dependency injection to replace a default behavior
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Extending the Hub pipeline
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Handling errors
8
Building Complex Applications
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Building Complex Applications
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Introduction
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Implementing a room-based chat application
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Implementing a shared whiteboard
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Implementing a real-time map of flying airplanes
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Implementing a "pets finder" application
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Implementing a custom backplane
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Implementing a real-time error notification system
1
Creating Web Projects
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Creating Web Projects
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Introduction
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Creating an empty ASP.NET web application
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Creating an ASP.NET web forms application
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Creating an ASP.NET MVC application
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Creating an MVC controller and a related view
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Creating an ASP.NET website
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Insights
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Insights
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Transport strategies
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Asynchronous programming and SignalR
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Index
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Index

Introduction

Now, it's time to move our attention to the client side of SignalR. We've already written the client-side code in the previous chapters and briefly described the steps we needed to build fully working recipes; however, we never went into the details. Nevertheless, the client portion of any SignalR application is as necessary and important as the server counterpart. Here, we'll explore how a SignalR client really works and concentrate on the specific characteristics of the JavaScript client library in the context of its Hubs API.

The level of abstraction used by the Hubs API lets us reason in terms of the business methods defined on our server-side Hub-derived type. As already explained earlier, we can add as many methods on a Hub as we need, and define with these an interface made up of members with names and arguments which fit our business requirements.

The JavaScript client can access this interface in two different modes as follows:

  • A basic mode, where methods and events are...

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