Added support for cache control as a gin-gonic middleware

middleware.go

@@ -0,0 +1,16 @@
+package precompiler
+
+import (
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// GinMiddleware is used to set the cache-control header for all files under the specified asset path (including leading slash)
+func GinMiddleware(assetPath string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if strings.HasPrefix(c.Request.URL.Path, assetPath) {
+			c.Header("cache-control", "max-age=315360000; public")
+		}
+	}
+}