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CodeSignal

Enabling & Customizing CORS in Your Python REST API

via CodeSignal

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Overview

Modern web apps often need to fetch resources from different domains. CORS defines how servers declare which origins can make requests. By default, browsers block cross-origin requests, so you'll configure your FastAPI server to respond with the necessary headers.

Syllabus

  • Unit 1: CORS in Python APIs
    • Implementing CORS Middleware in FastAPI
    • FastAPI Route-Specific CORS Configuration
  • Unit 2: Preflight Requests in FastAPI
    • Implement Route-Specific CORS Preflight Configuration in FastAPI
    • Dynamic Preflight Caching Strategy
  • Unit 3: Cross Origin Cookie Authentication
    • Wildcard CORS Origins with Credentials in FastAPI
    • FastAPI SameSite Cookie Security Exercise
    • Configure CORS to Accept Multiple Origins in FastAPI
    • FastAPI Cross-Origin Cookie Authentication System
  • Unit 4: Production CORS and Debugging
    • Add Testing Environment CORS Configuration in FastAPI
    • Pattern-Based CORS Origin Validation

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