Class: Resizing::CarrierWave::CallbackFile

Inherits:
CarrierWave::SanitizedFile
  • Object
show all
Defined in:
lib/resizing/carrier_wave/callback_file.rb

Overview

The file handed to CarrierWave's :cache callbacks (extension_allowlist / extension_denylist / content_type_allowlist / content_type_denylist / size_range).

The extension used by the callbacks is derived from the content type whenever the content type is known, instead of being taken from the file name as plain CarrierWave does.

A file downloaded from a Resizing URL (e.g. when it is assigned through remote_<column>_url=) is the typical case: the last segment of the URL is the version string (.../images/<image_id>/v<version>), which contains dots, so the "extension" CarrierWave finds in the file name is a meaningless part of the version (Fv_Q for /v0cRq7Yb2mZt9LxA3wN8eKd5pHs1.Fv_Q), and extension_allowlist would reject every such file. The HTTP response carries the real content type, so it is the reliable source.

When the content type is unknown (application/octet-stream, or a type that no extension is registered for), the file name is used as is, as in plain CarrierWave.

Constant Summary collapse

UNKNOWN_CONTENT_TYPE =

Content type given to files whose real type could not be determined. Carries no information about the extension, so it is treated as unknown.

'application/octet-stream'

Instance Method Summary collapse

Instance Method Details

#original_filename ⇒ Object 



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# File 'lib/resizing/carrier_wave/callback_file.rb', line 27

def original_filename
  name = super
  return name if name.nil?

  extension = extension_for_content_type
  return name if extension.nil?

  basename, current_extension = split_extension(name)
  return name if extensions_for_content_type.include?(current_extension.downcase)

  "#{basename}.#{extension}"
end