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REST API Best Practices

Compile all REST best practices into a checklist.

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REST Best Practices

Design Best Practices

Practice Description
Use nouns /products not /getProducts
Plural resources /users not /user
HTTP methods Use correct methods for operations
Status codes Return appropriate status codes
Versioning Version your APIs from day one
Pagination Paginate all collection endpoints

Security Best Practices

Practice Description
HTTPS only Never expose APIs over HTTP
Authentication Require auth for all endpoints
Authorization Check permissions per resource
Rate limiting Prevent abuse
Input validation Validate all inputs
CORS Configure properly

Performance Best Practices

Practice Description
Caching Use ETag, Cache-Control headers
Compression Enable gzip/brotli
Pagination Don't return unbounded results
Field selection Let clients choose fields
CDN Cache static responses

Documentation Best Practices

  1. Use OpenAPI — Auto-generate from code
  2. Include examples — Request and response samples
  3. Document errors — List all error codes
  4. Version changelog — What changed between versions
  5. SDKs — Provide client libraries when possible

Common Anti-Patterns

Anti-Pattern Problem Solution
Verbs in URLs /getProducts Use HTTP methods
No pagination Unbounded results Always paginate
Ignoring status codes 200 for everything Use proper codes
Exposing internals DB column names in API Use DTOs
No error handling Raw exceptions Global exception handler

API Best Practices

Design Principles

  • Use nouns, not verbs
  • Plural resource names
  • Consistent naming conventions
  • Proper HTTP status codes

Versioning

  • URI versioning (/v1/resource)
  • Header versioning
  • Deprecation policy

Documentation

  • OpenAPI/Swagger specs
  • Request/Response examples
  • Error code documentation
  • Rate limit documentation

Key Points

  • Understanding REST API Best Practices is essential for production systems
  • Always consider scalability and maintainability
  • Test thoroughly before deploying to production
  • Monitor performance and set up alerting

Common Patterns

  1. Validation: Always validate input at the boundary
  2. Error Handling: Use structured error responses
  3. Logging: Log key events for debugging
  4. Testing: Unit, integration, and load tests
  5. Documentation: Keep docs updated with code changes

Practice Problems

0/3solved
Implement REST API Best Practices

Design and implement a solution for REST API Best Practices in a backend system. Consider scalability, error handling, and production readiness.

Solution
// REST API Best Practices implementation
// Key aspects: validation, error handling, logging, testing

public class RESTAPIBestPractices {
    // Production-ready implementation
}
REST API Best Practices Edge Cases

Identify and handle edge cases for REST API Best Practices. What happens under high load, with invalid input, or during failures?

Solution
// Edge case handling:
// 1. Null/empty input -> validation
// 2. High load -> rate limiting, queuing
// 3. Failures -> retries, circuit breaker
// 4. Concurrent access -> locks, idempotency
REST API Best Practices Testing Strategy

Write a testing strategy for REST API Best Practices. Include unit tests, integration tests, and performance tests.

Solution
// Test plan:
// - Unit: 80% coverage target
// - Integration: API contracts
// - Performance: latency, throughput
// - Chaos: failure injection

Quiz

1. What is a common REST anti-pattern?

Question 1 options

2. Why should all collection endpoints be paginated?

Question 2 options

3. What is the primary purpose of REST API Best Practices?

Question 3 options

4. What is a common mistake when implementing REST API Best Practices?

Question 4 options

Flashcards

Question

REST anti-pattern: verbs in URLs?

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Answer

Yes — use HTTP methods instead (/products, not /getProducts)

Question

Why paginate all collections?

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Answer

Prevent unbounded results, memory issues, slow responses

Question

What is REST API Best Practices?

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Answer

REST API Best Practices is a key concept in backend development.

Question

When to use REST API Best Practices?

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Answer

Use REST API Best Practices when building production systems that require reliability, scalability, and maintainability.

Question

REST API Best Practices best practices

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Answer

Follow SOLID principles, write clean code, test thoroughly, document decisions, and monitor in production.

Revision Notes

Key Takeaways

  • 1.Use nouns, plural, HTTP methods, proper status codes
  • 2.Always paginate, validate inputs, handle errors
  • 3.HTTPS, auth, rate limiting are mandatory
  • 4.Document with OpenAPI, provide examples

Interview Tips

  • •Know REST best practices for design and security
  • •Be ready to identify anti-patterns

Cheat Sheet

REST Best Practices

  • Design: Nouns, plural, HTTP methods, versioning
  • Security: HTTPS, auth, rate limiting, CORS
  • Performance: Caching, pagination, compression
  • Anti-patterns: Verbs in URLs, no pagination, 200 for everything