mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
24 lines
618 B
Ruby
24 lines
618 B
Ruby
# frozen_string_literal: true
|
|
|
|
module ActiveStorage
|
|
class Previewer::PDFPreviewer < Previewer
|
|
class_attribute :mutool_path, default: "mutool"
|
|
|
|
def self.accept?(blob)
|
|
blob.content_type == "application/pdf"
|
|
end
|
|
|
|
def preview
|
|
download_blob_to_tempfile do |input|
|
|
draw_first_page_from input do |output|
|
|
yield io: output, filename: "#{blob.filename.base}.png", content_type: "image/png"
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
def draw_first_page_from(file, &block)
|
|
draw mutool_path, "draw", "-F", "png", "-o", "-", file.path, "1", &block
|
|
end
|
|
end
|
|
end
|