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un-uploader Demo Server

Getting set-up

  1. Check out Vagrantfile.example and make your own Vagrantfile
  2. Create your own config/database.yml
  3. Create your own config/secrets.yml
  4. Run the codes:
$ vagrant up

At this point, if you are using VMware and not using NFS you will probably need to re-install the Guest Additions, use this guide.

$ vagrant ssh
$ cd server
$ bundle
$ rake db:setup
$ bin/rails s

Sidekiq is used for background processing, in order to process uploads it must be running:

$ bundle exec sidekiq

Amazon S3

In our example we upload directly to S3 from the client. We strongly recommend this approach because it ensures that the original file is backed-up in redundant storage and frees you from needing to implement this functionality in your own infrastructure.

Since we upload directly to S3, it is important to set a CORS configuration on the bucket that you will upload to:

<CORSConfiguration>
  <CORSRule>
    <AllowedOrigin>*</AllowedOrigin>
    <AllowedMethod>PUT</AllowedMethod>
    <MaxAgeSeconds>3000</MaxAgeSeconds>
    <ExposeHeader>ETag</ExposeHeader>
    <ExposeHeader>x-amz-id-2</ExposeHeader>
    <AllowedHeader>*</AllowedHeader>
  </CORSRule>
</CORSConfiguration>

The above configuration is a bit loose as it allows file uploads from any source. In production you will likey want to change <AllowedOrigin> from * to https://mysite.com, if you want to allow HTTPS and HTTP uploading you can simply add another <AllowedOrigin> rule with the http scheme.

Pusher

In our example we use Pusher as a way to send events to the client, as you can see this doesn't occupy a lot of code and could be substituted for another solution such as Faye, Socket.IO, or a multitude of other pub/sub solutions.