Tutorials ASP.NET Core Web API Tutorial

HTTP Status Codes in ASP.NET Core Web API — Complete Guide

HTTP Status Codes in ASP.NET Core Web API — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of ASP.NET Core Web API Tutorial on Toolliyo Academy.

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ASP.NET Core Web API Tutorial · Lesson 37 of 100

Claims-Based Authorization in Web API

Beginner ✓IntermediateAdvancedProfessional

Intermediate · 2 — Data & security · ~6 min · Module 4: Authentication & Security

What is this?

Claims-Based Authorization in Web API is a core Web API concept. Learn the idea in plain words first, then run the example in ShopNest.API.

Why should you care?

Interviewers and production teams expect you to explain Claims-Based Authorization in Web API clearly — not just copy code from Stack Overflow.

See it live — copy this example

Create a Web API (dotnet new webapi), paste the example, run dotnet run, test in Swagger.

// Claims-Based Authorization in Web API — ShopNest.API
[ApiController]
[Route("api/[controller]")]
public class DemoController : ControllerBase
{
    [HttpGet]
    public IActionResult Get() => Ok(new { topic = "Claims-Based Authorization in Web API" });
}

Run Example »

Edit the code and click Run — like W3Schools Try it Yourself.

Code
Result

What happened?

  • Study the example line by line.
  • Each part connects to Claims-Based Authorization in Web API.
  • Edit one line, run dotnet run, and test in Swagger to see what changes.

Try it yourself

  1. Read what Claims-Based Authorization in Web API means in the introduction.
  2. Type the example in ShopNest.API — do not only copy-paste.
  3. Test the endpoint in Swagger or curl.
  4. Change a route URL or DTO property and save — test again in Swagger or curl.
  5. Return the wrong status code on purpose (404 instead of 200) and see what the client shows.

Remember

You learned what Claims-Based Authorization in Web API is and when to use it. You ran or traced working API code. Move to the next lesson when you can explain it in your own words.

Interview prep for this lesson

Practice these questions aloud after reading—each links to a full structured answer.

Mid PDF Detailed
What are HTTP status codes, and why are they important in RESTful
Short answer: PIs? HTTP status codes are 3-digit numbers returned by the server to indicate the result of a client request. They are important because they: Communicate success, failure, or redirection. Help clients hand…
Mid PDF Detailed
What are HTTP status codes, and why are they important in RESTful APIs?
Short answer: HTTP status codes are 3-digit numbers returned by the server to indicate the result of a client request. They are important because they: Communicate success, failure, or redirection. Help clients handle re…
Junior PDF Detailed
What is the role of HTTP in RESTful APIs?
Short answer: HTTP provides the transport mechanism and defines methods: GET → Retrieve data POST → Create resource PUT → Update resource DELETE → Remove resource PATCH → Partial update Real-world example (ShopNest) Crea…
Mid PDF Detailed
What should be the response for an HTTP DELETE request?
Short answer: 200 OK → If the resource was successfully deleted and a response body is returned. 204 No Content → If the resource was deleted but no body is needed. 404 Not Found → If the resource does not exist. Real-wo…
Mid PDF Detailed
Why is the HTTP GET method considered safe and idempotent?
Short answer: Safe → Because it only retrieves data without modifying server state. Idempotent → Multiple GET requests have the same result; no side effects occur. Real-world example (ShopNest) Creating an order is POST…
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ASP.NET Core Web API Tutorial
Course syllabus

ASP.NET Core Web API Tutorial

Module 1: Introduction and Environment Setup
Module 2: Web API Basics
Module 3: Routing
Module 4: Return Types and Status Codes
Module 5: Model Binding
Module 6: Entity Framework Core
Module 7: AutoMapper and Mapperly
Module 8: HTTP Methods
Module 9: Logging
Module 10: Caching
Module 11: FluentValidation
Module 12: Filters
Module 13: Security
Module 14: API Versioning
Module 15: Repository Pattern
Module 16: E-Commerce Real-Time Application
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