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POPaperclip & RMagick - 3-page thumbnail of PDF and renaming
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6919222
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2011-08-02T22:00:08.300
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2012-02-05T18:32:34.483
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Body
<p>I want to upload pdf file, and create (as a separate file) a thumbnail image with first 3 pages of the pdf aligned horizontally. I managed to do a Paperclip Processor with RMagick to generate that file, but the problem is: I want the seperate file (the one with style for thumbnail) have the right extension (ex. jpg) not original pdf. It would be great if I could still get the correct path by using the url method with style, for ex.:</p> <pre><code>>> attachment.url => "/some/path/id/original/test.pdf" # original file >> attachment.url(:pdf_thumbnail) => "/some/path/id/pdf_thumbnail/test.jpg" # jpg file, not pdf </code></pre> <p>Some code:</p> <h2>Processor</h2> <pre><code>module Paperclip class PdfThumbnail < Processor def initialize(file, options = {}, attachment = nil) super @file = file @instance = options[:instance] @current_format = File.extname(@file.path) @basename = File.basename(@file.path, @current_format) end def make dst = Tempfile.new([@basename, 'jpg'].compact.join(".")) dst.binmode pdf = ::Magick::ImageList.new(File.expand_path(@file.path)) image = pdf[0..2].append(false) image.format = 'JPG' image.write(File.expand_path(dst.path)) dst.flush return dst end end end </code></pre> <h2>Model (extract)</h2> <pre><code>has_attached_file :file, :styles => {:pdf_thumbnail => ""}, :processors => [:pdf_thumbnail] </code></pre> <p>It ends in doing:</p> <pre><code>$ tree . . `-- 46 |-- original | `-- test.pdf `-- pdf_thumbnail `-- test.pdf </code></pre> <p>and:</p> <pre><code>$ file 46/original/test.pdf 46/original/test.pdf: PDF document, version 1.4 $ file 46/pdf_thumbnail/test.pdf 46/pdf_thumbnail/test.pdf: JPEG image data, JFIF standard 1.01 </code></pre> <p>So files are good, but I want a different extension for <code>pdf_thumbnail</code> style.</p> <p>Any help? Or maybe another way/cleaner code?</p>
Tags
<ruby-on-rails><ruby><paperclip><rmagick>
Title
Paperclip & RMagick - 3-page thumbnail of PDF and renaming
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