1 files changed, 27 insertions, 0 deletions
diff --git a/lib/paperclip/media_type_spoof_detector_extensions.rb b/lib/paperclip/media_type_spoof_detector_extensions.rb
new file mode 100644
index 000000000..9c0557356
--- /dev/null
+++ b/lib/paperclip/media_type_spoof_detector_extensions.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module Paperclip
+  module MediaTypeSpoofDetectorExtensions
+    def calculated_content_type
+      @calculated_content_type ||= type_from_mime_magic || type_from_file_command
+    end
+
+    def type_from_mime_magic
+      @type_from_mime_magic ||= begin
+        begin
+          File.open(@file.path) do |file|
+            MimeMagic.by_magic(file)&.type
+          end
+        rescue Errno::ENOENT
+          ''
+        end
+      end
+    end
+
+    def type_from_file_command
+      @type_from_file_command ||= FileCommandContentTypeDetector.new(@file.path).detect
+    end
+  end
+end
+
+Paperclip::MediaTypeSpoofDetector.prepend(Paperclip::MediaTypeSpoofDetectorExtensions)