book

ASP.NET Core 9 Web API Cookbook

Name: ASP.NET Core 9 Web API Cookbook
ISBN: 9781835880340

by Luke Avedon, Garry Cabrera

April 2025

Intermediate to advanced

348 pages

7h 13m

English

Packt Publishing

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ASP.NET Core 9 Web API Cookbook
Contributors
About the authors
Learn more on Discord
About the reviewer
Preface
Who this book is forWhat this book coversTo get the most out of this bookDownload the example code filesConventions usedSectionsGetting readyHow to do it…How it works…There’s more…See alsoGet in touchShare Your ThoughtsFree Benefits with Your Book
Chapter 1: Practical Data Access in ASP.NET Core Web APIs
Technical requirementsCreating a mock database for EF Core with BogusGetting readyHow to do it…How it works…See also...Using ProblemDetails to return more robust error informationGetting readyHow to do it…How it works…See alsoCreating a categories endpoint using the new LINQ CountBy() methodGetting readyHow to do it…How it works…Implementing KeySet paginationGetting readyHow to do it…How it works…See alsoConfiguring a CORS policy to expose pagination metadataGetting readyHow to do it…How it works…Implementing efficient first- and last-page access with EF CoreGetting readyHow to do it…How it works…See alsoTesting the API in PowerShellGetting readyHow to do it…How it works…Using the new AggregateBy LINQ method to return the average price per categoryGetting readyHow to do it…How it works…See also
Chapter 2: Mastering Resource Creation and Validation
Technical requirementsModel validation with data annotationsGetting readyHow to do it…How it works…Creating a custom validation attributeGetting readyHow to do it…How it works…Implementing complex validation logic with IValidateObjectGetting readyHow to do It…How it works…Creating complex validation rules with FluentValidationGetting readyHow to do it…How it works…See alsoUpdating resources with PUT and AutoMapperGetting readyHow to do it…How it works…Managing cascade delete with AutoMapperGetting readyHow to do it…How it works…Updating specific model fields with PATCH and JsonPatchDocumentGetting readyHow to do it…How it works…See also
Chapter 3: Securing Your Web API
Technical requirementsRejecting HTTP requests with custom ProblemDetails middlewareGetting readyHow to do it…How it works…Setting up HTTPS on a custom domain – creating a self-signed certificate with PowerShellGetting readyHow to do it…How it works...See also…Setting up ASP.NET Core IdentityGetting ready…How to do it…How it works…Using cookie authentication in ASP.NET Core Web APIGetting ready…How to do it…How it works…JWT authentication with IdentityGetting ready…How to do it…How it works…Implementing policy-based and role-based authenticationGetting ready…How to do it…How it works…See also...Learn more on Discord
Chapter 4: Creating Custom Middleware
Technical requirementsBuilding a health report for your APIGetting readyHow to do it…How it works…Adding health checks to OpenAPI using the new document transformersGetting readyHow to do it…How it works…See also…Creating a custom database performance health checkGetting readyHow to do it…How it works…Creating custom middleware for adding security headersGetting readyHow to do it…How it works…Creating factory middleware for centralized data transformationGetting readyHow to do it…How it works…
Chapter 5: Creating Comprehensive Logging Solutions
Technical requirementsLogging all requests with Serilog and SeqGetting readyHow to do it…How it works…Improving request logs with custom DiagnosticContext propertiesGetting readyHow to do it…How it works…Logging controller and action method namesGetting readyHow to do it…How it works…See alsoUnified request logging – combining ASP.NET Core’s HttpLogging with Serilog and SeqGetting readyHow to do it...How it works…Crafting Serilog log objects in ASP.NET Core controllersGetting readyHow to do it…How it works…See alsoConfiguring Seq and Serilog with an API KeyGetting readyHow to do it…How it works…See also

Chapter 6: Real-Time Communication with SignalR
Technical requirementsCreating a real-time opinion poll in SignalRGetting readyHow to do it…How it works…JWT authentication flow – identity from controller login to SignalR connectionGetting readyHow to do it…How it works…Invoking a hub method from an HTTP controller – announcing user loginGetting readyHow to do it…How it works…User customization with IUserIdProviderGetting readyHow to do it…How it works…Sending direct messages via SignalRGetting readyHow to do it…How it works…Implementing admin-controlled group management in SignalRGetting readyHow to do it…How it works…Learn more on Discord
Chapter 7: Building Robust API Tests: a Guide to Unit and Integration Testing
Technical requirementsUnit testing an API service method with xUnitGetting readyHow to do it…How it works…Unit testing with AutoFixture, NSubstitute, and FluentAssertionsGetting readyHow to do it…How it works…See also…Organizing unit tests with a base service classGetting readyHow to do it…How it works…Testing pagination with custom UrlHelper and NSubstituteGetting readyHow to do it…How it works…Controller unit tests with custom fixturesGetting readyHow to do it…How it works…Web API integration testingGetting readyHow to do it…How it works…Authentication in integration testingGetting readyHow to do it…How it works…See also…
Chapter 8: GraphQL: Designing Flexible and Efficient APIs
Technical requirementsReal-time updates via GraphQL subscriptionsGetting readyHow to do it…How it works…Mutations for modifying data in GraphQLGetting readyHow to do it…How it works…Implementing efficient pagination in GraphQLGetting readyHow to do it…How it works…Filtering and sorting with GraphQLGetting readyHow to do it…How it works…Distributed GraphQL with Hot Chocolate FusionGetting readyHow to do it…How it works…
Chapter 9: Deploying and Managing Your WebAPI in the Cloud
Technical requirementsBuilding with Azure – core service integration through geolocationGetting ready…How to do it…How it works…Azure Key Vault – securing configuration with custom health checksGetting ready…How to do it…How it works…Creating an API gateway with a YARP reverse proxy and a custom load-balancing policyGetting ready…How to do it…How it works…Migrating a distributed API to .NET Aspire for unified orchestration and monitoringGetting ready…How to do it…How it works…Integrating dockerized services with .NET Aspire – an example with PrometheusGetting ready…How to do it…How it works…Learn more on Discord
Chapter 10: The Craft of Caching
Technical requirementsManual client-side response caching with HTTP headersGetting readyHow to do it…How it works…Validating client-side cache with Last-Modified headersGetting readyHow to do it…How it works…There’s more…Client-side ETag cache validation with the ResponseCache attributeGetting readyHow to do it…How it works…See alsoOutput caching with Aspire RedisGetting readyHow to do it…How it works…Server-side caching with IDistributedCache and Redis via .NET AspireGetting readyHow to do it...How it works...Using the new HybridCache library to simplify distributed cachingGetting readyHow to do it….How it works…See also
Chapter 11: Beyond the Core
Technical requirementsMicroservice communication via gRPC and .NET AspireGetting readyHow to do it…How it works…Implementing bidirectional streaming with gRPC in .NET AspireGetting readyHow to do it…How it works…Implementing real-time updates with Dapr pub/sub in .NET AspireGetting readyHow to do it…How it works…Sharing state between services with Dapr state storesGetting readyHow to do it…How it works…
Chapter 12: Unlock Your Exclusive Benefits
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Overview

The "ASP.NET Core 9 Web API Cookbook" is a comprehensive guide packed with over 60 practical recipes to help you build, secure, and optimize enterprise-grade web APIs. Dive into modern API technologies such as REST and GraphQL while mastering the essential skills for designing efficient, scalable backend systems.

What this Book will help me do

Master building robust and scalable RESTful APIs using ASP.NET Core 9 features.
Explore advanced topics like GraphQL and SignalR to enhance API capabilities.
Secure your APIs with modern techniques including OAuth2, authentication, and HTTPS.
Gain expertise in testing APIs for reliability and performance using unit and integration testing practices.
Deploy your APIs effectively to cloud environments, ensuring scalability and uptime.

Author(s)

Luke Avedon and Garry Cabrera are seasoned software developers with extensive experience in .NET and backend development. They are passionate about sharing their knowledge through practical tutorials and books, ensuring their readers gain hands-on skills and a deep understanding of the topics covered.

Who is it for?

This book is ideal for intermediate to advanced developers, including .NET, backend, and DevOps professionals, looking to enhance their API development and security skills. It also caters to developers experienced in other programming languages like Java or Go who want to explore the capabilities of ASP.NET Core. A foundational knowledge of web APIs and the .NET framework is recommended.

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