Syllabus

ASP.NET Core Complete Tutorial (ShopNest)

Module 1: Foundations
What is ASP.NET Core? Complete Guide Setting Up ASP.NET Core Development Environment ASP.NET Core Project Structure Explained MVC Architecture in ASP.NET Core — Complete Guide Controllers and Actions in ASP.NET Core Routing in ASP.NET Core — Conventional and Attribute Routing Views and Razor Syntax in ASP.NET Core Layouts, Partial Views and View Components Models and ViewModels in ASP.NET Core Forms, Model Binding and Validation in ASP.NET Core Tag Helpers in ASP.NET Core — Complete Guide Static Files, Bundling and Minification in ASP.NET Core
Module 2: Entity Framework Core
Entity Framework Core — Introduction and Setup EF Core Code First — Models, Migrations, Database EF Core CRUD Operations — Create, Read, Update, Delete EF Core LINQ Queries — Beginner to Advanced EF Core Relationships — One-to-One, One-to-Many, Many-to-Many EF Core Fluent API — Advanced Configuration EF Core Repository Pattern and Unit of Work EF Core Performance Optimization Database First Approach with EF Core (Scaffold) EF Core with SQL Server — Advanced Features
Module 3: Dependency Injection & Middleware
Dependency Injection in ASP.NET Core — Complete Guide Middleware in ASP.NET Core — Complete Guide Configuration in ASP.NET Core — appsettings, Environment Variables, Secrets Filters in ASP.NET Core — Action, Authorization, Exception, Resource, Result Logging in ASP.NET Core — ILogger, Serilog, NLog Error Handling and Exception Management in ASP.NET Core
Module 4: Authentication & Security
ASP.NET Core Identity — Complete Setup Guide Authentication in ASP.NET Core — Cookie and JWT Authorization in ASP.NET Core — Roles, Policies, Claims JWT Authentication with Refresh Tokens — Complete Implementation OAuth2 and External Login (Google, Facebook, Microsoft) Data Protection and Encryption in ASP.NET Core HTTPS, SSL Certificates and Security Best Practices
Module 5: Web API
Building REST APIs with ASP.NET Core — Complete Guide API Versioning in ASP.NET Core Swagger / OpenAPI Documentation in ASP.NET Core Input Validation in Web APIs — FluentValidation and Data Annotations Pagination, Filtering and Sorting in ASP.NET Core APIs HTTP Client and Consuming External APIs in ASP.NET Core Minimal APIs in ASP.NET Core .NET 8 SignalR — Real-Time Web Applications
Module 6: Advanced Architecture
Clean Architecture in ASP.NET Core CQRS Pattern with MediatR in ASP.NET Core Repository Pattern — Deep Dive with Generic Repository Background Services and Hosted Services in ASP.NET Core Caching in ASP.NET Core — In-Memory, Distributed, Redis Health Checks in ASP.NET Core AutoMapper in ASP.NET Core Microservices with ASP.NET Core — Introduction Message Queues with RabbitMQ / Azure Service Bus in ASP.NET Core gRPC with ASP.NET Core
Module 7: Testing
Unit Testing ASP.NET Core with xUnit and Moq Integration Testing in ASP.NET Core Testing EF Core — In-Memory vs SQLite Performance Testing and Load Testing ASP.NET Core APIs Test-Driven Development (TDD) in ASP.NET Core
Module 8: Deployment & DevOps
Deploying ASP.NET Core to IIS on Windows Server Docker and Containerization for ASP.NET Core Deploying ASP.NET Core to Azure App Service CI/CD with GitHub Actions for ASP.NET Core Azure SQL Database with ASP.NET Core Environment Configuration and Secrets Management
Module 9: Real-World Projects
Build a Complete Blog Website with ASP.NET Core MVC Build an E-Commerce Product Catalog API (ASP.NET Core Web API) Build a Student Management System (Complete CRUD App) Build a Job Portal (Full Stack ASP.NET Core) Build a REST API with Clean Architecture — Complete Guide Build a Real-Time Chat App with SignalR and ASP.NET Core
Module 10: Advanced Topics
Blazor WebAssembly and Blazor Server — Complete Guide gRPC, GraphQL and Alternative API Styles in ASP.NET Core Rate Limiting and API Throttling in ASP.NET Core .NET 8 Output Caching in ASP.NET Core .NET 8 ASP.NET Core .NET 9 New Features — Complete Guide
ASP.NET Core Complete Tutorial (ShopNest)
Lesson 32 of 75 43% of course

JWT Authentication with Refresh Tokens — Complete Implementation

1 · 5 min · 5/24/2026

Learn JWT Authentication with Refresh Tokens — Complete Implementation in our free ASP.NET Core Complete Tutorial (ShopNest) series. Step-by-step explanations, examples, and interview tips on Toolliyo Academy.

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JWT Authentication with Refresh Tokens — Complete Implementation — ShopNest
Article 32 of 75 · Module 4: Authentication & Security · ShopNest Mobile App Backend API
Target keyword: jwt refresh tokens asp.net core · Read time: ~35 min · .NET: 8 / 9 · Project: ShopNest Mobile App Backend API

Introduction

Short-lived access tokens limit exposure; refresh tokens let ShopNest mobile apps get new access tokens without re-login. This advanced lesson implements the full pattern with rotation, revocation, and Identity integration.

After this article you will

  • Issue access + refresh token pair on login
  • Store refresh tokens hashed in database
  • Rotate refresh tokens on each use
  • Revoke tokens on logout and security events
  • Avoid common JWT security mistakes

Prerequisites

Concept deep-dive

public class RefreshToken
{
    public int Id { get; set; }
    public string UserId { get; set; } = "";
    public string TokenHash { get; set; } = "";
    public DateTime ExpiresAt { get; set; }
    public DateTime? RevokedAt { get; set; }
    public string? ReplacedByTokenHash { get; set; }
    public bool IsActive => RevokedAt == null && DateTime.UtcNow < ExpiresAt;
}

// Login response
return Ok(new {
    accessToken = GenerateJwt(user, expires: TimeSpan.FromMinutes(15)),
    refreshToken = plainRefreshToken, // store hash only
    expiresIn = 900
});

// POST /api/auth/refresh
// Validate refresh token hash, revoke old, issue new pair (rotation)

Security: Access token 15 min; refresh 7–30 days; hash refresh tokens (SHA256); bind to device/client ID optional; HTTPS only; never store access token in localStorage if XSS risk — prefer httpOnly cookie for web.

Hands-on — ShopNest Mobile App Backend API

  1. RefreshToken entity + migration.
  2. AuthController: login, refresh, logout (revoke), revoke-all.
  3. Detect reuse of old refresh token — revoke entire family (breach signal).
  4. Mobile client: intercept 401, call refresh once, retry request.

Common errors & best practices

  • Long-lived JWT without refresh — stolen token valid for days.
  • Storing refresh token plaintext in DB — hash like passwords.
  • Refresh endpoint without rate limiting — brute force vector.
  • Same signing key for dev and prod — rotate keys per environment.

Interview questions

Q: Why refresh tokens?
A: Short access token limits damage; refresh allows UX without constant login.

Q: Token rotation?
A: Each refresh invalidates old token and issues new — detects theft if old reused.

Q: Where store refresh token on mobile?
A: Secure storage (Keychain/Keystore), not plain preferences.

Summary

  • Access + refresh pattern is industry standard for mobile APIs
  • Store hashed refresh tokens; rotate on each refresh
  • Revoke on logout and suspicious reuse
  • Integrates with Identity user store from Article 29

Previous: Authorization — Roles, Policies, Claims
Next: OAuth2 and External Login

FAQ

Possible with httpOnly + SameSite=Strict — common secure pattern.

JWT blacklist?

Hard with stateless JWT — short expiry + refresh rotation preferred over central blacklist.

Interview Q&A for this course

Test your knowledge

Quizzes linked to this course—pass to earn certificates.

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LINQ — Practice Quiz
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Entity Framework Core — Practice Quiz
Test your understanding of Entity Framework Core Tutorial. Modern ORM: Code First, migrati…
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Design Patterns in C# — Practice Quiz
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ASP.NET Core Complete Tutorial (ShopNest)

On this page

Introduction After this article you will Prerequisites Concept deep-dive Hands-on — ShopNest Mobile App Backend API Common errors &amp; best practices Interview questions Summary FAQ Refresh token in cookie for SPA? JWT blacklist?
Module 1: Foundations
What is ASP.NET Core? Complete Guide Setting Up ASP.NET Core Development Environment ASP.NET Core Project Structure Explained MVC Architecture in ASP.NET Core — Complete Guide Controllers and Actions in ASP.NET Core Routing in ASP.NET Core — Conventional and Attribute Routing Views and Razor Syntax in ASP.NET Core Layouts, Partial Views and View Components Models and ViewModels in ASP.NET Core Forms, Model Binding and Validation in ASP.NET Core Tag Helpers in ASP.NET Core — Complete Guide Static Files, Bundling and Minification in ASP.NET Core
Module 2: Entity Framework Core
Entity Framework Core — Introduction and Setup EF Core Code First — Models, Migrations, Database EF Core CRUD Operations — Create, Read, Update, Delete EF Core LINQ Queries — Beginner to Advanced EF Core Relationships — One-to-One, One-to-Many, Many-to-Many EF Core Fluent API — Advanced Configuration EF Core Repository Pattern and Unit of Work EF Core Performance Optimization Database First Approach with EF Core (Scaffold) EF Core with SQL Server — Advanced Features
Module 3: Dependency Injection & Middleware
Dependency Injection in ASP.NET Core — Complete Guide Middleware in ASP.NET Core — Complete Guide Configuration in ASP.NET Core — appsettings, Environment Variables, Secrets Filters in ASP.NET Core — Action, Authorization, Exception, Resource, Result Logging in ASP.NET Core — ILogger, Serilog, NLog Error Handling and Exception Management in ASP.NET Core
Module 4: Authentication & Security
ASP.NET Core Identity — Complete Setup Guide Authentication in ASP.NET Core — Cookie and JWT Authorization in ASP.NET Core — Roles, Policies, Claims JWT Authentication with Refresh Tokens — Complete Implementation OAuth2 and External Login (Google, Facebook, Microsoft) Data Protection and Encryption in ASP.NET Core HTTPS, SSL Certificates and Security Best Practices
Module 5: Web API
Building REST APIs with ASP.NET Core — Complete Guide API Versioning in ASP.NET Core Swagger / OpenAPI Documentation in ASP.NET Core Input Validation in Web APIs — FluentValidation and Data Annotations Pagination, Filtering and Sorting in ASP.NET Core APIs HTTP Client and Consuming External APIs in ASP.NET Core Minimal APIs in ASP.NET Core .NET 8 SignalR — Real-Time Web Applications
Module 6: Advanced Architecture
Clean Architecture in ASP.NET Core CQRS Pattern with MediatR in ASP.NET Core Repository Pattern — Deep Dive with Generic Repository Background Services and Hosted Services in ASP.NET Core Caching in ASP.NET Core — In-Memory, Distributed, Redis Health Checks in ASP.NET Core AutoMapper in ASP.NET Core Microservices with ASP.NET Core — Introduction Message Queues with RabbitMQ / Azure Service Bus in ASP.NET Core gRPC with ASP.NET Core
Module 7: Testing
Unit Testing ASP.NET Core with xUnit and Moq Integration Testing in ASP.NET Core Testing EF Core — In-Memory vs SQLite Performance Testing and Load Testing ASP.NET Core APIs Test-Driven Development (TDD) in ASP.NET Core
Module 8: Deployment & DevOps
Deploying ASP.NET Core to IIS on Windows Server Docker and Containerization for ASP.NET Core Deploying ASP.NET Core to Azure App Service CI/CD with GitHub Actions for ASP.NET Core Azure SQL Database with ASP.NET Core Environment Configuration and Secrets Management
Module 9: Real-World Projects
Build a Complete Blog Website with ASP.NET Core MVC Build an E-Commerce Product Catalog API (ASP.NET Core Web API) Build a Student Management System (Complete CRUD App) Build a Job Portal (Full Stack ASP.NET Core) Build a REST API with Clean Architecture — Complete Guide Build a Real-Time Chat App with SignalR and ASP.NET Core
Module 10: Advanced Topics
Blazor WebAssembly and Blazor Server — Complete Guide gRPC, GraphQL and Alternative API Styles in ASP.NET Core Rate Limiting and API Throttling in ASP.NET Core .NET 8 Output Caching in ASP.NET Core .NET 8 ASP.NET Core .NET 9 New Features — Complete Guide