Next.js Authorization Server
A modern, production-ready OAuth2 authorization server built with Next.js 15, React 19, TypeScript, Prisma, and PostgreSQL, implementing clean architecture principles with comprehensive security features and full OAuth2 specification compliance.
The Challenge
Needed a secure, scalable OAuth2 authorization server that follows modern security standards, supports multiple grant types, implements PKCE (Proof Key for Code Exchange), and provides comprehensive token management while maintaining clean, maintainable code architecture.
My Solution
Developed a complete OAuth2 authorization server using Next.js App Router with clean architecture principles, featuring domain-driven design, comprehensive security implementations, and full RFC compliance. Implemented multiple grant types, PKCE support, token introspection, and device authorization flows with extensive testing coverage.
Key Contributions
- Architected complete OAuth2 server using clean architecture with domain-driven design
- Implemented all OAuth2 grant types: authorization code, client credentials, device code, and token exchange
- Built mandatory PKCE support with S256 and plain challenge methods for enhanced security
- Developed comprehensive token management with introspection, revocation, and refresh capabilities
- Created dynamic client registration system with secure client validation
- Implemented device authorization flow for IoT and limited input devices
- Built extensive test suite with unit, integration, and OAuth2 compliance tests
- Designed PostgreSQL database schema with Prisma ORM for optimal performance
- Implemented middleware for request validation and security checks
- Added comprehensive error handling and logging throughout the application
Technologies Used
Results & Impact
Created a production-ready OAuth 2.1 authorization server that fully complies with RFC specifications, supports all major grant types, implements modern security practices including PKCE, and provides comprehensive token management with extensive test coverage ensuring reliability and security.
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