Support Go 1.23

New

• Support Go 1.23 (#36)

Deprecate

• Stop testing with Go 1.21 in accordance with Go's version support policy (#36)

Support Go 1.22

New

• Support Go 1.22

Require an instance of Config instead of a pointer

This release requires an instance of Config instead of a pointer in New, in order to avoid common mistakes when applied concurrently. Furthermore, this change moves the generation of cache-controls from request-invocation to middleware-instantiation to increase performance.

Changes

• Require an instance of Config instead of a pointer by @joeig in #1

Add a preset to cache assets forever

CacheAssetsForeverPreset is a cache-control configuration preset which advices the HTTP client and all caches in between to cache the object forever without revalidation.

Technically, "forever" means 1 year, in order to comply with common CDN limits.

Implement and expose cache-control middleware for Gin

This is the inital release of a Gin middleware, which generates cache-control headers.