diff options
Diffstat (limited to 'activestorage/lib/active_storage/previewer.rb')
| -rw-r--r-- | activestorage/lib/active_storage/previewer.rb | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/activestorage/lib/active_storage/previewer.rb b/activestorage/lib/active_storage/previewer.rb index cf19987d72..2053ed4511 100644 --- a/activestorage/lib/active_storage/previewer.rb +++ b/activestorage/lib/active_storage/previewer.rb @@ -1,14 +1,12 @@ # frozen_string_literal: true -require "active_storage/downloading" +require "active_support/core_ext/string/filters" module ActiveStorage # This is an abstract base class for previewers, which generate images from blobs. See # ActiveStorage::Previewer::PDFPreviewer and ActiveStorage::Previewer::VideoPreviewer for examples of # concrete subclasses. class Previewer - include Downloading - attr_reader :blob # Implement this method in a concrete subclass. Have it return true when given a blob from which @@ -28,6 +26,11 @@ module ActiveStorage end private + # Downloads the blob to a tempfile on disk. Yields the tempfile. + def download_blob_to_tempfile #:doc: + blob.open(&block) + end + # Executes a system command, capturing its binary output in a tempfile. Yields the tempfile. # # Use this method to shell out to a system library (e.g. mupdf or ffmpeg) for preview image |