fix: don't wait for thumbnail generation if already cached

route/route.go

@@ -109,7 +109,7 @@ func HandleThumb(c *fiber.Ctx) error {
 	}
 	c.Set(fiber.HeaderContentType, fiber.MIMETextHTML)
 	pathSlice := strings.Split(req, "/")
-	pathSlice = pathSlice[1:len(pathSlice)]
+	pathSlice = pathSlice[1:]
 	pathBase, ok := config.Config.ServeDirs[pathSlice[0]]
 	if ok {
 		pathSlice[0] = pathBase
@@ -121,12 +121,12 @@ func HandleThumb(c *fiber.Ctx) error {
 			thumbnail.GetThumbnail(c, completePath)
 		} else if errors.Is(err, os.ErrNotExist) {
 			return c.Status(fiber.StatusNotFound).SendString("Sorry can't find that!")
-		} else {
+		} /* else {
 			// Schrodinger: file may or may not exist. See err for details.
 
 			// Therefore, do *NOT* use !os.IsNotExist(err) to test for file existence
 
-		}
+		} */
 	} else {
 		return c.Status(fiber.StatusNotFound).SendString("Sorry can't find that!")
 	}

thumbnail/thumbnail.go

@@ -63,16 +63,15 @@ func Free() {
 }
 
 func GetThumbnail(c *fiber.Ctx, completePath string) {
-	WaitForAvailable()
 	c.Set(fiber.HeaderContentType, "image")
 	thumbnailCacheMutex.RLock()
 	bytesThumb, ok := thumbnailCache[completePath]
 	thumbnailCacheMutex.RUnlock()
 	if ok {
 		c.Write(bytesThumb)
-		Free()
 		return
 	}
+	WaitForAvailable()
 
 	fileExt := filepath.Ext(completePath)
 	if !slices.Contains(SupportedFileTypes, fileExt) {