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POHeroku - how to write into "tmp" directory?
 

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  1. POHeroku - how to write into "tmp" directory?
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    <p>I need to use the <code>tmp</code> folder on Heroku (Cedar) for writing some temporarily data, I am trying to do that this way:</p> <pre><code>open("#{Rails.root}/tmp/#{result['filename']}", 'wb') do |file| file.write open(image_url).read end </code></pre> <p>But this produce error </p> <pre><code>Errno::ENOENT: No such file or directory - /app/tmp/image-2.png </code></pre> <p>I am trying this code and it's running properly on localhost, but I cannot make it work on Heroku.</p> <p>What is the proper way to save some files to the <code>tmp</code> directory on Heroku (Cedar stack)?</p> <p>Thank you</p> <p><strong>EDIT:</strong> I am running method with Delayed Jobs that needs to has access to the tmp file.</p> <p><strong>EDIT2:</strong> What I am doing:</p> <pre><code>files.each_with_index do |f, index| unless f.nil? result = JSON.parse(buffer) filename = "#{Time.now.to_i.to_s}_#{result['filename']}" # thumbnail name thumb_filename = "#{Rails.root}/tmp/#{filename}" image_url = f.file_url+"/convert?rotate=exif" open("#{Rails.root}/tmp/#{result['filename']}", 'wb') do |file| file.write open(image_url).read end img = Magick::Image.read(image_url).first target = Magick::Image.new(150, 150) do self.background_color = 'white' end img.resize_to_fit!(150, 150) target.composite(img, Magick::CenterGravity, Magick::CopyCompositeOp).write(thumb_filename) key = File.basename(filename) s3.buckets[bucket_name].objects[key].write(:file =&gt; thumb_filename) # save path to the new thumbnail to database f.update_attributes(:file_url_thumb =&gt; "https://s3-us-west-1.amazonaws.com/bucket/#{filename}") end end </code></pre> <p>I have in database information about images. These images are stored in Amazon S3 bucket. I need to create thumbnails to these images. So I am going through one image by another one, load the image, temporarily save it, then resize it and afterwards I will upload this thumbnail to S3 bucket.</p> <p>But this procedure doesn't seems to be working on Heroku, so, how could I do that (my app is running on Heroku)?</p>
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      1. POHeroku - how to write into "tmp" directory?
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    1. COSince it says that there is no directory in this patch, maybe you should create it before using? Or do you want to know where is the standard tmp on heroku?
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      1. POHeroku - how to write into "tmp" directory?
      1. USfotanus
    2. COkeep in mind, that heroku has serious limitations on the file system! https://devcenter.heroku.com/articles/dynos#ephemeral-filesystem
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      1. POHeroku - how to write into "tmp" directory?
      1. USphoet
    3. COEven if a request to the app created a tmp file, the file is most likely gone, if the delayed jobs comes along later.
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      1. POHeroku - how to write into "tmp" directory?
      1. USspickermann
 

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