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author | Aidan Haran <aidanharan@yahoo.com> | 2017-12-09 13:41:02 +0000 |
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committer | GitHub <noreply@github.com> | 2017-12-09 13:41:02 +0000 |
commit | 66f34a8ea58c8c98d9cc2651d386c9e5a0789d08 (patch) | |
tree | d24e9014cf9045abc892ba97ac993e2e26e31c7e /activestorage/lib/active_storage/previewer/pdf_previewer.rb | |
parent | 3291fa3630c456450f8c6a9b771f77c293d036cd (diff) | |
parent | 55d4cf2a9c1a6e77ed7aedb866e964039bb4a143 (diff) | |
download | rails-66f34a8ea58c8c98d9cc2651d386c9e5a0789d08.tar.gz rails-66f34a8ea58c8c98d9cc2651d386c9e5a0789d08.tar.bz2 rails-66f34a8ea58c8c98d9cc2651d386c9e5a0789d08.zip |
Merge branch 'master' into custom-discarded-job-handling
Diffstat (limited to 'activestorage/lib/active_storage/previewer/pdf_previewer.rb')
-rw-r--r-- | activestorage/lib/active_storage/previewer/pdf_previewer.rb | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/activestorage/lib/active_storage/previewer/pdf_previewer.rb b/activestorage/lib/active_storage/previewer/pdf_previewer.rb new file mode 100644 index 0000000000..b84aefcc9c --- /dev/null +++ b/activestorage/lib/active_storage/previewer/pdf_previewer.rb @@ -0,0 +1,24 @@ +# 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 |