Policy Configuration
Specifies which origins are allowed to access the resources. Use * for any origin (insecure with credentials) or a specific domain like https://example.com.
Defines the HTTP methods allowed when accessing the resource. Used in response to a preflight request.
Specifies which HTTP headers can be used during the actual request. Common ones: Content-Type, Authorization.
Indicates how long the results of a preflight request can be cached (in seconds).
Security Note: When
Allow Credentials is true, Allow Origin cannot be wildcard (*). It must be an explicit origin.
What is CORS?
Cross-Origin Resource Sharing is a security mechanism that allows or restricts resources on a web page to be requested from another domain outside the domain from which the first resource was served. It's a critical part of modern web application security.
Environment: Nginx Configuration
Implementation Tip:
Place these directives within your location block in the Nginx configuration file (usually /etc/nginx/sites-available/default).