Building Web APIs with ASP.NET Core

Discover how to build robust web APIs with ASP.NET Core, the open-source framework for Windows, macOS, and Linux.

Introduction

• APIs today
• Why an API?
• What you should know

1. Getting Started

• Prerequisites and setup
• "Hello World," API style
• "Hello World" with Visual Studio Code
• HTTP in a nutshell
• REST basics
• API design basics
• Tools for API testing

2. Retrieving Data

• Controllers and actions
• Routing basics
• Creating a data model
• Using Entity Framework Core
• Returning a list of items
• Using IActionResult
• Returning an item
• Handling errors
• Making the API asynchronous

3. Advanced Data Retrieval

• Introduction
• Paginating items
• Filtering items
• Searching items
• Sorting items
• Challenge: Advanced search
• Solution: Advanced search

4. Writing Data

• HTTP verbs
• ASP.NET model binding
• Model validation
• Adding an item with POST
• Updating an item with PUT
• Deleting an item with DELETE
• Challenge: Deleting several items
• Solution: Deleting several items

5. API Versioning

• Versioning options
• The Microsoft versioning library
• Implement URL versioning
• Implementing header versioning
• Implementer query string versioning
• Documenting the API

6. Securing APIs

• Enforcing HTTPS
• Consuming the API with JavaScript
• Cross-Origin Resource Sharing (CORS)
• Enabling CORS
• OAuth and OpenID Connect
• Setting up IdentityServer
• Securing the API with IdentityServer
• Consuming the protected API

Conclusion

• Next steps