Index: src/modules/contrib/feeds/src/Feeds/Target/File.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/modules/contrib/feeds/src/Feeds/Target/File.php	(revision bc02ac8218b61138d87b88ef73840c0a57c9559c)
+++ src/modules/contrib/feeds/src/Feeds/Target/File.php	(revision )
@@ -124,10 +124,10 @@
 
   protected function getFileName($url) {
     $filename = trim(drupal_basename($url), " \t\n\r\0\x0B.");
-    $extension = substr($filename, strrpos($filename, '.') + 1);
+    $extension = strtolower(substr($filename, strrpos($filename, '.') + 1));
 
     if (!in_array($extension, $this->fileExtensions)) {
-      throw new TargetValidationException('The file, %url, failed to save because the extension, %ext, is invalid.', ['%url' => $url, '%ext' => $extension]);
+      drupal_set_message(t('The file, %url, maybe failed to save because the extension, %ext, is invalid.', ['%url' => $url, '%ext' => $extension]));
     }
 
     return $filename;