What are the best practices for using CORS headers?

What are the best practices for using CORS headers?

The best practices for using CORS headers include specifying allowed origins, using the correct HTTP methods, and setting appropriate credentials.

Can you explain why it's important to specify allowed origins?

Specifying allowed origins helps prevent unauthorized access to your resources, enhancing security by controlling which domains can interact with your API.

What HTTP methods should I allow?

You should allow only the HTTP methods that your application needs, such as GET, POST, PUT, and DELETE, to minimize exposure.

How do credentials affect CORS?

When credentials are included, such as cookies or HTTP authentication, you must set the Access-Control-Allow-Credentials header to true and specify the exact origin.

Are there any common mistakes to avoid with CORS?

Yes, common mistakes include using a wildcard for allowed origins, not handling preflight requests properly, and misconfiguring headers.