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-rw-r--r--lib/paperclip/type_corrector.rb19
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/paperclip/type_corrector.rb b/lib/paperclip/type_corrector.rb
new file mode 100644
index 000000000..0b0c10a56
--- /dev/null
+++ b/lib/paperclip/type_corrector.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require 'mime/types/columnar'
+
+module Paperclip
+  class TypeCorrector < Paperclip::Processor
+    def make
+      target_extension = options[:format]
+      extension        = File.extname(attachment.instance.file_file_name)
+
+      return @file unless options[:style] == :original && target_extension && extension != target_extension
+
+      attachment.instance.file_content_type = options[:content_type] || attachment.instance.file_content_type
+      attachment.instance.file_file_name    = File.basename(attachment.instance.file_file_name, '.*') + '.' + target_extension
+
+      @file
+    end
+  end
+end