[Feature Request]: Support All Cache-Control Directives

[samuel871211]

Current Status

Currently, this package only supports a limited set of Cache-Control directives:

• public
• max-age
• immutable

Proposal

Add support for additional Cache-Control directives as defined in the IANA HTTP Cache Directive Registry (https://www.iana.org/assignments/http-cache-directives/http-cache-directives.xhtml).

Relevant Standards

• RFC 9111 - HTTP Caching (core directives)
• RFC 8246 - HTTP Immutable Responses (for immutable directive)
• RFC 5861 - HTTP Cache-Control Extensions for Stale Content (for stale-while-revalidate, stale-if-error)

Suggested Additional Directives

High-priority directives commonly used in static file serving:

• private
• no-cache
• no-store
• must-revalidate
• proxy-revalidate
• s-maxage
• stale-while-revalidate
• stale-if-error
• no-transform
• must-understand

Benefits

1. More comprehensive caching control for static assets
2. Better alignment with HTTP standards
3. Improved developer experience with complete Cache-Control support

Implementation Considerations

• Maintain backward compatibility with existing API
• Add proper validation for directive combinations
• Consider performance impact of additional option parsing

Would you be interested in this enhancement? I'm happy to contribute to the implementation.