Tempfile

The tempfile plugin makes it easier to reuse a single copy of an uploaded file on disk.

Shrine.plugin :tempfile

The plugin provides the UploadedFile#tempfile method, which returns a copy of the uploaded file's content on disk. The first time the method is called the file content will be downloaded into a temporary file and returned. On any subsequent method calls the cached temporary file will be returned directly. If the uploaded file is currently open, its tempfile is deleted when the uploaded file is closed; otherwise it's deleted whenever it becomes unreachable and is garbage collected (so it's still recommended to close the uploaded file when you're done with it, to have the tempfile cleaned up deterministically).

uploaded_file.tempfile #=> #<Tempfile:...> (file is downloaded and cached)
uploaded_file.tempfile #=> #<Tempfile:...> (cache is returned)
 
# OR
 
uploaded_file.open do
  # ...
  uploaded_file.tempfile #=> #<Tempfile:...> (file is cached)
  # ...
  uploaded_file.tempfile #=> #<Tempfile:...> (cache is returned)
  # ...
end # tempfile is deleted
 
# OR
 
uploaded_file.open
# ...
uploaded_file.tempfile #=> #<Tempfile:...> (file is cached)
# ...
uploaded_file.tempfile #=> #<Tempfile:...> (cache is returned)
# ...
uploaded_file.close # tempfile is deleted

This plugin also modifies Shrine.with_file to call UploadedFile#tempfile when the given IO object is an open UploadedFile. Since Shrine.with_file is typically called on the Shrine class directly, it's recommended to load this plugin globally.