scinote-eln/scinote-web
1
1
Fork 0
mirror of https://github.com/scinote-eln/scinote-web.git synced 2025-10-29 15:36:36 +08:00
Code Issues Projects Releases Packages Wiki Activity

Switch to pdftoppm PDF preview maker

Browse source
This commit is contained in:
Jure Grabnar 2019-07-10 23:10:00 +02:00
parent a20a0ed5e2
commit 03d7affaae
1 changed files with 17 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
lib/paperclip_processors/custom_file_preview.rb
View file

@ -3,6 +3,7 @@
module Paperclip module Paperclip
class CustomFilePreview < Processor class CustomFilePreview < Processor
def make def make
pdftoppm_path = ENV['PDFTOPPM_PATH'] || 'pdftoppm'
libreoffice_path = ENV['LIBREOFFICE_PATH'] || 'soffice' libreoffice_path = ENV['LIBREOFFICE_PATH'] || 'soffice'
directory = File.dirname(@file.path) directory = File.dirname(@file.path)
basename = File.basename(@file.path, '.*') basename = File.basename(@file.path, '.*')
@ -11,25 +12,29 @@ module Paperclip
begin begin
if @file.content_type == 'application/pdf' if @file.content_type == 'application/pdf'
# We use special convert options for PDFs to improve quality and content = Paperclip.run(
# background, we append [0] to convert only the first page pdftoppm_path,
convert( "-singlefile -r 72 -png #{@file.path}"
":source -resize '#{options[:geometry]}' -format #{options[:format]} -flatten -quality 70 :dest",
source: File.expand_path(@file.path) + '[0]',
dest: File.expand_path(dst.path)
) )
# Save intermediate content to tempfile
tmp = TempfileFactory.new.generate
tmp.write(content)
tmp.rewind
original_preview_file = tmp.path
else else
Paperclip.run( Paperclip.run(
libreoffice_path, libreoffice_path,
"--headless --invisible --convert-to png --outdir #{directory} #{@file.path}" "--headless --invisible --convert-to png --outdir #{directory} #{@file.path}"
) )
convert(
":source -resize '#{options[:geometry]}' -format #{options[:format]} #{options[:convert_options]} :dest",
source: File.expand_path(original_preview_file),
dest: File.expand_path(dst.path)
)
end end
convert(
":source -resize '#{options[:geometry]}' -format #{options[:format]} #{options[:convert_options]} :dest",
source: File.expand_path(original_preview_file),
dest: File.expand_path(dst.path)
)
ensure ensure
File.delete(original_preview_file) if File.file?(original_preview_file) File.delete(original_preview_file) if File.file?(original_preview_file)
end end