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PORails 3 get raw post data and write it to tmp file
 

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    <p>I'm working on implementing <a href="http://valums.com/ajax-upload/" rel="noreferrer">Ajax-Upload</a> for uploading photos in my Rails 3 app. The documentation says:</p> <blockquote> <ol> <li><p>For IE6-8, Opera, older versions of other browsers you get the file as you normally do with regular form-base uploads.</p></li> <li><p>For browsers which upload file with progress bar, you will need to get the raw post data and write it to the file.</p></li> </ol> </blockquote> <p>So, how can I receive the raw post data in my controller and write it to a tmp file so my controller can then process it? (In my case the controller is doing some image manipulation and saving to S3.)</p> <p>Some additional info:</p> <p>As I'm configured right now the post is passing these parameters:</p> <pre><code>Parameters: {"authenticity_token"=&gt;"...", "qqfile"=&gt;"IMG_0064.jpg"} </code></pre> <p>... and the CREATE action looks like this:</p> <pre><code>def create @attachment = Attachment.new @attachment.user = current_user @attachment.file = params[:qqfile] if @attachment.save! respond_to do |format| format.js { render :text =&gt; '{"success":true}' } end end end </code></pre> <p>... but I get this error:</p> <pre><code>ActiveRecord::RecordInvalid (Validation failed: File file name must be set.): app/controllers/attachments_controller.rb:7:in `create' </code></pre>
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    1. COI just released an example of ajax upload in rails 3 + Uploadify here: https://github.com/apneadiving/Pic-upload---Crop-in-Ajax . Hope it may help
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