SignalR Real-time Application Cookbook

Book Image

SignalR Real-time Application Cookbook

By : Roberto Vespa

Book Image

SignalR Real-time Application Cookbook

By: Roberto Vespa

Overview of this book

SignalR Real-time Application Cookbook

SignalR Real-time Application Cookbook

Credits

About the Author

About the Author

Acknowledgments

Acknowledgments

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Free Chapter

Understanding the Basics

Understanding the Basics

Adding a Hub to an ASP.NET project

Adding a Hub to a self-hosting application

Connecting to a Hub from a JavaScript client

Connecting to a Hub from a .NET application

Using Hubs

Adding a method to a Hub and counting the calls to it

Calling back the caller from a Hub's method

Broadcasting to all connected clients

Adding a connection to a group

Removing a connection from a group

Broadcasting to all connected clients except the caller

Broadcasting to all clients except the specified ones

Broadcasting to all clients in a group except the caller

Broadcasting from outside a Hub

Using the return value of a Hub method

Using the JavaScript Hubs Client API

Using the JavaScript Hubs Client API

Starting a Hub connection

Setting up connection transport strategies

Calling a server-side Hub method

Adding a client-side method on the proxy and calling it from the server

Managing errors across a complex asynchronous workflow

Using the .NET Hubs Client API

Using the .NET Hubs Client API

Starting a Hub connection

Setting up connection transport strategies

Calling a server-side Hub method

Adding a client-side method on the proxy and calling it from the server

Managing errors across a complex asynchronous workflow

Using a Persistent Connection

Using a Persistent Connection

Adding and registering a persistent connection

Sending messages from the server

Sending messages to the server

Exchanging messages between a server and a JavaScript client

Exchanging messages between a server and a .NET client

Handling Connections

Handling Connections

Controlling the lifetime of a connection

Handling a connection transient state

Establishing a cross-domain connection

Analyzing Advanced Scenarios

Analyzing Advanced Scenarios

Generating static files for JavaScript proxies

Authorizing requests on a Hub

Authorizing requests on a persistent connection

Authorizing requests in a self-hosting context

Scaling out with Azure

Scaling out with Redis

Scaling out with SQL Server

Establishing proxy-less connections

Introducing dependency injection (simple approach)

Introducing dependency injection (advanced approach)

Using dependency injection to replace a default behavior

Extending the Hub pipeline

Handling errors

Building Complex Applications

Building Complex Applications

Implementing a room-based chat application

Implementing a shared whiteboard

Implementing a real-time map of flying airplanes

Implementing a "pets finder" application

Implementing a custom backplane

Implementing a real-time error notification system

Creating Web Projects

Creating Web Projects

Creating an empty ASP.NET web application

Creating an ASP.NET web forms application

Creating an ASP.NET MVC application

Creating an MVC controller and a related view

Creating an ASP.NET website

Insights

Transport strategies

Asynchronous programming and SignalR

Index

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Introduction

In this chapter, we will take a deeper look at the .NET client library on the Hubs API. From a functional perspective, this API does not differ from the JavaScript one; in fact, it basically offers the same features, the only difference being the platform it operates on. Hence, in this chapter, we'll keep the same outline that we used in Chapter 3, Using the JavaScript Hubs Client API, with recipes that are similar to the ones in that chapter.

This chapter will concentrate exclusively on the .NET client's code that we'll be writing; however, as usual, we will need a counterpart for the server Hub. In order to avoid repetition and complexity, we will use the same servers that we used in Chapter 3, Using the JavaScript Hubs Client API, and we'll connect the new clients to those servers to perform the operations. Clients will perform mostly the same actions as the corresponding ones from there. In this way, you will have a chance to easily compare the two APIs in action, discovering...