1 files changed, 12 insertions, 2 deletions
diff --git a/activestorage/lib/active_storage/service/gcs_service.rb b/activestorage/lib/active_storage/service/gcs_service.rb
index eb46973509..18c0f14cfc 100644
--- a/activestorage/lib/active_storage/service/gcs_service.rb
+++ b/activestorage/lib/active_storage/service/gcs_service.rb
@@ -34,14 +34,22 @@ module ActiveStorage
         end
       else
         instrument :download, key: key do
-          file_for(key).download.string
+          begin
+            file_for(key).download.string
+          rescue Google::Cloud::NotFoundError
+            raise ActiveStorage::FileNotFoundError
+          end
         end
       end
     end
 
     def download_chunk(key, range)
       instrument :download_chunk, key: key, range: range do
-        file_for(key).download(range: range).string
+        begin
+          file_for(key).download(range: range).string
+        rescue Google::Cloud::NotFoundError
+          raise ActiveStorage::FileNotFoundError
+        end
       end
     end
 
@@ -116,6 +124,8 @@ module ActiveStorage
         chunk_size = 5.megabytes
         offset = 0
 
+        raise ActiveStorage::FileNotFoundError unless file.present?
+
         while offset < file.size
           yield file.download(range: offset..(offset + chunk_size - 1)).string
           offset += chunk_size