Added SetCacheControl method to request with relative constants.

evo.constants.go

@@ -225,3 +225,14 @@ const (
 	HeaderXRobotsTag                      = "X-Robots-Tag"
 	HeaderXUACompatible                   = "X-UA-Compatible"
 )
+
+// Cache control headers
+const (
+	CachePrivate        = "private"
+	CachePublic         = "public"
+	CacheNoStore        = "no-store"
+	CacheNoCache        = "no-cache"
+	CacheNoTransform    = "no-transform"
+	CacheMustUnderstand = "must-understand"
+	CacheImmutable      = "immutable"
+)

evo.context.go

@@ -256,3 +256,20 @@ func (r *Request) Var(key string, value ...any) generic.Value {
 func (r *Request) RestartRouting() error {
 	return r.Context.RestartRouting()
 }
+
+func (r *Request) SetCacheControl(t time.Duration, headers ...string) {
+	if len(headers) == 0 {
+		return
+	}
+
+	var ccHeader string = fmt.Sprintf("max-age=%.0f", t.Seconds())
+	var options string
+
+	for _, header := range headers {
+		options = options + fmt.Sprintf(", %s", header)
+	}
+
+	ccHeader = ccHeader + options
+
+	r.SetHeader("Cache-Control", ccHeader)
+}