API Design · question
Question 7 of 110
What is CORS and how do you handle it in APIs?
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Re-explain
CORS (Cross-Origin Resource Sharing) allows controlled access to resources from different domains.
CORS Headers:
Access-Control-Allow-Origin: https://example.com
Access-Control-Allow-Methods: GET, POST, PUT, DELETE
Access-Control-Allow-Headers: Content-Type, Authorization
Access-Control-Max-Age: 3600
Preflight Requests: Browser sends OPTIONS request for complex requests.
Security Considerations:
- Don't use
* for credentials-enabled requests
- Be specific with allowed origins
- Validate origins server-side
- Consider using CORS libraries
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