lib/docsplit/transparent_pdfs.rb in burisu-docsplit-0.7.5 vs lib/docsplit/transparent_pdfs.rb in burisu-docsplit-0.7.6

@@ -7,10 +7,10 @@
     # Temporarily convert any non-PDF documents to PDFs before running them
     # through further extraction.
     def ensure_pdfs(docs)
       [docs].flatten.map do |doc|
         ext = File.extname(doc)
-        if ext.downcase == '.pdf' || File.open(doc, &:readline) =~ /\A\%PDF-\d+(\.\d+)?$/
+        if ext.downcase == '.pdf' || File.open(doc, "rb", &:readline) =~ /\A\%PDF-\d+(\.\d+)?$/
           doc
         else
           tempdir = File.join(Dir.tmpdir, 'docsplit')
           extract_pdf([doc], {:output => tempdir})
           File.join(tempdir, File.basename(doc, ext) + '.pdf')