Book Image

Apps and Services with .NET 7

By : Mark J. Price
Book Image

Apps and Services with .NET 7

By: Mark J. Price

Overview of this book

Apps and Services with .NET 7 is for .NET 6 and .NET 7 developers who want to kick their C# and .NET understanding up a gear by learning the practical skills and knowledge they need to build real-world applications and services. It covers specialized libraries that will help you monitor and improve performance, secure your data and applications, and internationalize your code and apps. With chapters that put a variety of technologies into practice, including Web API, OData, gRPC, GraphQL, SignalR, and Azure Functions, this book will give you a broader scope of knowledge than other books that often focus on only a handful of .NET technologies. It covers the latest developments, libraries, and technologies that will help keep you up to date. You’ll also leverage .NET MAUI to develop mobile apps for iOS and Android as well as desktop apps for Windows and macOS.

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Apps and Services with .NET 7
Mark J. Price
Nov, 2022 | 814 pages
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Table of Contents (23 chapters)
Preface
Preface
Where to find the code solutions
What this book covers
What you need for this book
Get in touch
1
Introducing Apps and Services with .NET
Introducing Apps and Services with .NET
Introducing this book and its contents
App and service technologies
Setting up your development environment
Using an analyzer to write better code
What’s new in C# and .NET?
Making good use of the GitHub repository for this book
Where to go for help
Practicing and exploring
Summary
Free Chapter
2
Managing Relational Data Using SQL Server
Managing Relational Data Using SQL Server
Understanding modern databases
Managing data with Transact-SQL
Managing data with low-level APIs
Managing data with EF Core
Mapping inheritance hierarchies with EF Core
Building a reusable entity data model
Cleaning up data resources
Practicing and exploring
Summary
3
Managing NoSQL Data Using Azure Cosmos DB
Managing NoSQL Data Using Azure Cosmos DB
Understanding NoSQL databases
Creating Cosmos DB resources
Manipulating data with Core (SQL) API
Manipulating graph data with Gremlin API
Cleaning up Azure resources
Practicing and exploring
Summary
4
Benchmarking Performance, Multitasking, and Concurrency
Benchmarking Performance, Multitasking, and Concurrency
Understanding processes, threads, and tasks
Monitoring performance and resource usage
Running tasks asynchronously
Synchronizing access to shared resources
Understanding async and await
Practicing and exploring
Summary
5
Implementing Popular Third-Party Libraries
Implementing Popular Third-Party Libraries
Which third-party libraries are most popular?
Working with images
Logging with Serilog
Mapping between objects
Making fluent assertions in unit testing
Validating data
Generating PDFs
Practicing and exploring
Summary
6
Observing and Modifying Code Execution Dynamically
Observing and Modifying Code Execution Dynamically
Working with reflection and attributes
Working with expression trees
Creating source generators
Practicing and exploring
Summary
7
Handling Dates, Times, and Internationalization
Handling Dates, Times, and Internationalization
Working with dates and times
Working with time zones
Working with cultures
Practicing and exploring
Summary
8
Protecting Your Data and Applications
Protecting Your Data and Applications
Understanding the vocabulary of protection
Encrypting and decrypting data
Hashing data
Signing data
Generating random numbers
Authenticating and authorizing users
Practicing and exploring
Summary
9
Building and Securing Web Services Using Minimal APIs
Building and Securing Web Services Using Minimal APIs
Building web services using ASP.NET Core Minimal APIs
Relaxing the same origin security policy using CORS
Preventing denial-of-service attacks using rate limiting
Understanding identity services
Practicing and exploring
Summary
10
Exposing Data via the Web Using OData
Exposing Data via the Web Using OData
Understanding OData
Building a web service that supports OData
Testing OData services using Visual Studio Code extensions
Versioning OData controllers
Enabling entity inserts, updates, and deletes
Building clients for OData services
Practicing and exploring
Summary
11
Combining Data Sources Using GraphQL
Combining Data Sources Using GraphQL
Understanding GraphQL
Building a service that supports GraphQL
Defining GraphQL queries for EF Core models
Building a .NET client for a GraphQL service
Implementing GraphQL mutations
Practicing and exploring
Summary
12
Building Efficient Microservices Using gRPC
Building Efficient Microservices Using gRPC
Understanding gRPC
Building a gRPC service and client
Implementing gRPC for an EF Core model
Implementing gRPC JSON transcoding
Practicing and exploring
Summary
13
Broadcasting Real-Time Communication Using SignalR
Broadcasting Real-Time Communication Using SignalR
Understanding SignalR
Building a live communication service using SignalR
Building a web client using the SignalR JavaScript library
Building a .NET console app client
Streaming data using SignalR
Practicing and exploring
Summary
14
Building Serverless Nanoservices Using Azure Functions
Building Serverless Nanoservices Using Azure Functions
Understanding Azure Functions
Building an Azure Functions project
Responding to timer and resource triggers
Publishing an Azure Functions project to the cloud
Cleaning up Azure Functions resources
Practicing and exploring
Summary
15
Building Web User Interfaces Using ASP.NET Core
Building Web User Interfaces Using ASP.NET Core
Setting up an ASP.NET Core MVC website
Defining web user interfaces with Razor views
Localizing and globalizing with ASP.NET Core
Defining web user interfaces with Tag Helpers
Practicing and exploring
Summary
16
Building Web Components Using Blazor WebAssembly
Building Web Components Using Blazor WebAssembly
Understanding Blazor
Building Blazor components
Building a Blazor data component
Implementing caching using local storage
Building Progressive Web Apps
Practicing and exploring
Summary
17
Leveraging Open-Source Blazor Component Libraries
Leveraging Open-Source Blazor Component Libraries
Understanding open-source Blazor component libraries
Exploring Radzen Blazor components
Building a web service for Northwind entities
Practicing and exploring
Summary
18
Building Mobile and Desktop Apps Using .NET MAUI
Building Mobile and Desktop Apps Using .NET MAUI
Understanding XAML
Understanding .NET MAUI
Building mobile and desktop apps using .NET MAUI
Using shared resources
Using data binding
Understanding MVVM
Consuming a web service from a mobile app
Practicing and exploring
Summary
19
Integrating .NET MAUI Apps with Blazor and Native Platforms
Integrating .NET MAUI Apps with Blazor and Native Platforms
Building .NET MAUI Blazor Hybrid apps
Integrating with native platforms
Using third-party control libraries
Practicing and exploring
Summary
20
Introducing the Survey Project Challenge
Introducing the Survey Project Challenge
What have you learned in this book?
Why a survey project?
What are the product requirements?
Promote your abilities
Summary
21
Epilogue
Epilogue
Second edition coming November 2023
Next steps on your C# and .NET learning journey
Good luck!
22
Index
Index

Relaxing the same origin security policy using CORS

Modern web browsers support multiple tabs so users can visit multiple websites at the same time efficiently. If code executing in one tab could access resources in another tab, then that could become a method of attack.

All web browsers implement a security feature called the same origin policy. This means that only requests that come from the same origin are allowed. For example, if a block of JavaScript is served from the same origin that hosts a web service or served an <iframe>, then that JavaScript can call the service and access the data in the <iframe>. If a request is made from a different origin, then the request fails.

An origin is defined by the following:

  • Scheme aka protocol, for example, HTTP or HTTPS
  • Port (if specified)
  • Host/domain/subdomain, for example, www.example.com, www.example.net, example.com

If the origin is http://www.example.com/about-us/, then the following...

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