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-rw-r--r--activestorage/lib/active_storage/previewer/mupdf_previewer.rb36
-rw-r--r--activestorage/lib/active_storage/previewer/pdf_previewer.rb26
-rw-r--r--activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb35
3 files changed, 71 insertions, 26 deletions
diff --git a/activestorage/lib/active_storage/previewer/mupdf_previewer.rb b/activestorage/lib/active_storage/previewer/mupdf_previewer.rb
new file mode 100644
index 0000000000..ae02a4889d
--- /dev/null
+++ b/activestorage/lib/active_storage/previewer/mupdf_previewer.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+module ActiveStorage
+ class Previewer::MuPDFPreviewer < Previewer
+ class << self
+ def accept?(blob)
+ blob.content_type == "application/pdf" && mutool_exists?
+ end
+
+ def mutool_path
+ ActiveStorage.paths[:mutool] || "mutool"
+ end
+
+ def mutool_exists?
+ return @mutool_exists unless @mutool_exists.nil?
+
+ system mutool_path, out: File::NULL, err: File::NULL
+
+ @mutool_exists = $?.exitstatus == 1
+ end
+ 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 self.class.mutool_path, "draw", "-F", "png", "-o", "-", file.path, "1", &block
+ end
+ end
+end
diff --git a/activestorage/lib/active_storage/previewer/pdf_previewer.rb b/activestorage/lib/active_storage/previewer/pdf_previewer.rb
deleted file mode 100644
index 426ff51eb1..0000000000
--- a/activestorage/lib/active_storage/previewer/pdf_previewer.rb
+++ /dev/null
@@ -1,26 +0,0 @@
-# frozen_string_literal: true
-
-module ActiveStorage
- class Previewer::PDFPreviewer < Previewer
- 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
-
- def mutool_path
- ActiveStorage.paths[:mutool] || "mutool"
- end
- end
-end
diff --git a/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb b/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb
new file mode 100644
index 0000000000..2a787362cf
--- /dev/null
+++ b/activestorage/lib/active_storage/previewer/poppler_pdf_previewer.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+module ActiveStorage
+ class Previewer::PopplerPDFPreviewer < Previewer
+ class << self
+ def accept?(blob)
+ blob.content_type == "application/pdf" && pdftoppm_exists?
+ end
+
+ def pdftoppm_path
+ ActiveStorage.paths[:pdftoppm] || "pdftoppm"
+ end
+
+ def pdftoppm_exists?
+ return @pdftoppm_exists unless @pdftoppm_exists.nil?
+
+ @pdftoppm_exists = system(pdftoppm_path, "-v", out: File::NULL, err: File::NULL)
+ end
+ 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)
+ # use 72 dpi to match thumbnail dimesions of the PDF
+ draw self.class.pdftoppm_path, "-singlefile", "-r", "72", "-png", file.path, &block
+ end
+ end
+end