Overview
This page contains 8 code snippets for implementing Authentication in Express.js. Each snippet is production-ready and can be copy-pasted directly into your project.
Available Snippets
Socket.io Server
Real-time WebSocket server with optional JWT auth
- Socket.io integration with Express
- Optional JWT authentication
- Room management helpers
Apollo GraphQL Server
Apollo Server 4 with Express integration
- Apollo Server 4 setup
- Express middleware integration
- Context for authentication
Swagger JSDoc
API documentation using JSDoc and Swagger UI
- OpenAPI 3.0.0 specification
- Interactive Swagger UI at /docs
- JSON specification at /docs.json
JWT Authentication
JWT middleware with role-based access
- JWT verification
- Role-based access control
- Token extraction from header/cookie
API Key Authentication
API key auth for service-to-service
- Header-based API key
- Multiple key support
- Key validation
Encryption Utilities
AES-256-GCM encryption/decryption
- AES-256-GCM encryption
- Automatic IV generation
- Authentication tag verification
JWT Utilities
JSON Web Token signing and verification
- Token signing
- Token verification
- Refresh token support
OTP Utilities
TOTP and QR code generation
- TOTP generation/verification
- QR code generation
- Backup code support
Frequently Asked Questions
How do I implement Authentication in Express.js?
Browse the snippets above and copy the code that matches your needs. Each snippet includes installation instructions and usage examples.
Are these snippets production-ready?
Yes, all snippets are designed for production use. However, always review and test them in your specific context before deployment.
Can I use these snippets with other Express.js versions?
These snippets are designed for the current major version of the framework. Check the snippet documentation for version compatibility notes.