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POPaperclip: upload from url with extension
 

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    <p>I would like to upload pictures from URLs by paperclip on S3 storage. I work with :</p> <pre><code>Ruby 1.9.3 Rails 3.2.6 paperclip 3.1.3 aws-sdk 1.3.9 </code></pre> <p>I have my Picture Model:</p> <pre><code>class Asset has_attached_file :asset, :styles =&gt; {:thumb =&gt; "60x60&gt;"}, :storage =&gt; :s3, :s3_credentials =&gt; "#{Rails.root}/config/s3.yml", :path =&gt; "/pictures/:id/:style.:extension" validates_attachment_content_type :asset, :content_type =&gt; ['image/gif', 'image/jpeg', 'image/png', 'image/x-ms-bmp'] end </code></pre> <p>So basically I made this to download my file from an URL:</p> <pre><code>picture = Asset.new(asset: open("http://www.my_url.com/my_picture.jpg")) picture.save </code></pre> <p>But it save my file with a bad file_name and it doesn't set the extension of the file :</p> <pre><code>#&lt;Asset id: 5, asset_file_name: "open-uri20120717-6028-1k3f7xz", asset_content_type: "image/jpeg", asset_update_at: nil, asset_file_size: 91565, created_at: "2012-07-17 12:41:40", updated_at: "2012-07-17 12:41:40"&gt; p.asset.url =&gt; http://s3.amazonaws.com/my_assets_path/pictures/5/original. </code></pre> <p>As you can see there is no extension.</p> <p>I found a method to solve it but I'm sure I can have a better way. This solution is to copy the file on my computer then I send it on S3 like this:</p> <pre><code>filename = "#{Rails.root}/tmp/my_picture.jpg" open(filename, 'wb') do |file| file &lt;&lt; open("http://www.my_url.com/my_picture.jpg").read end picture = Asset::Picture.new(asset: open(filename)) picture.save </code></pre> <p>This works on my computer:</p> <pre><code>#&lt;Asset::Picture id: 10, asset_file_name: "my_picture.jpg", asset_content_type: "image/jpeg", asset_update_at: nil, asset_file_size: 91565, created_at: "2012-07-17 12:45:30", updated_at: "2012-07-17 12:45:30"&gt; p.asset.url =&gt; "http://s3.amazonaws.com/assets.tests/my_assets_path/10/original.jpg" </code></pre> <p>However I don't know if this method will work on Heroku (I host my app on it).</p> <p>There is not a better way without pass by a temporary file? </p>
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