1 files changed, 11 insertions, 10 deletions
diff --git a/fussy.lisp b/fussy.lisp
index b7c8385..7416378 100644
--- a/fussy.lisp
+++ b/fussy.lisp
@@ -551,18 +551,19 @@ h1 {
   (or (uiop:file-exists-p (robots-path-name))
       ""))
 
+(defun theme-image-pathname (pkg theme img)
+  (uiop:ensure-pathname
+   (format nil "~a/~a/~a/~a"
+           (full-theme-image-directory)
+           pkg
+           theme
+           img)))
+
 (lzb:defendpoint* :get "/images/:pkg:/:theme:/:image:" () ()
   "Endpoint for serving theme preview images"
-  (let ((file-path
-          (pathname
-           (format nil "~a/~a/~a/~a"
-                   (full-theme-image-directory)
-                   pkg
-                   theme
-                   image))))
-    (unless (uiop:file-exists-p file-path)
-      (lzb:http-err 404 "no such file"))
-    file-path))
+  (a:if-let (file-path (theme-image-pathname pkg theme image))
+    file-path
+    (lzb:http-err 404 "No such file")))
 
 (defun a-string (s) s)