headers

func Middleware ¶

func Middleware(c *cache.Cache, cfg *config.HeadersConfig, indexFile string, next http.Handler) http.Handler

Middleware returns an http.Handler that:

1. Looks up the requested file in the cache to obtain ETag and LastModified.
2. Handles If-None-Match → 304 Not Modified.
3. Handles If-Modified-Since → 304 Not Modified.
4. Sets Cache-Control, ETag, Last-Modified, and Vary headers.

If the file is not yet cached (cache miss at this stage), header setting is deferred — the file handler will populate the cache and the next request will receive full caching headers.

func SetFileHeaders ¶

func SetFileHeaders(w http.ResponseWriter, urlPath string, f *cache.CachedFile, cfg *config.HeadersConfig)

SetFileHeaders writes ETag, Last-Modified, Cache-Control, and Vary response headers for a file that has just been loaded (possibly bypassing the middleware cache-check path). This is called directly from the file handler.