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POHeroku, H12 and passthrough upload timeouts
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  1. POHeroku, H12 and passthrough upload timeouts
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    copied!<p><strong>Overview:</strong></p> <p>I have a photobooth that takes pictures and sends them to my web application. Then my web application store users data and sends the picture to user facebook profile/fanpage.</p> <p>My web app runs <strong>Ruby on Rails @ Heroku</strong> Cedar stack.</p> <p><strong>Flow:</strong></p> <ol> <li>My webapp receives the photo from the photobooth via a POST, like an web form. </li> <li>The booth waits for the server response. If the upload has failed, it will send the picture again.</li> <li>The response from webapp only will be fired after facebook upload has been completed.</li> </ol> <p><strong>Problems:</strong></p> <p>Webapp only sends data to photobooth after all processing has been completed. Many times this will happen after 30 secs. This causes to Heroku fire an H12 - Timeout.</p> <p><strong>Solutions?</strong></p> <p><strong>Keep the request alive</strong> while file is being uploaded (return some response data in order to prevent heroku from firing a H12 - <a href="https://devcenter.heroku.com/articles/http-routing#timeouts" rel="nofollow noreferrer">https://devcenter.heroku.com/articles/http-routing#timeouts</a>). - Is it possible? how to achieve this in Ruby?</p> <p><strong>Change to Unicorn + Nginx</strong> and activate Upload Module (this way dyno only receives the request after the upload has been completed - <a href="https://stackoverflow.com/questions/9592664/unicorn-rails-large-uploads">Unicorn + Rails + Large Uploads</a>). Is it really possible?</p> <p><strong>Use the rack-timeout gem</strong>. This would make a lot of my passthrough uploads to fail, so the pictures would never be posted on Facebook, right?</p> <p><strong>Change the architecture.</strong> Make the upload direct to S3, spin a worker to check new pictures uploaded to S3 bucket, download them and send them to Facebook. - <em>This one might be the best one, but it takes a lot of time and effort. I might go for it in the long term, but I'm looking for a fast solution right now.</em></p> <p><strong>Other...</strong></p>
 

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