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Note: there is a fine Rails3 replacement for this old thing! http://github.com/nathancolgate/s3-swf-upload-plugin . However... this one is:.... A rails plugin which allow user upload files to S3 through an embedded flash directly. This fork has environment setting of amazon creds (to avoid hardcode in app), configurable message for the select bu…

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README
S3SwfUpload
===========

S3SwfUpload allow user uploading a file to S3 directly, so you can save the cost of uploading process in your app server.

Install
=======

./script/plugin install git://github.com/GreenAsJade/s3-swf-upload-plugin.git

Example
=======

There is an example app showing how to use this at

  http://github.com/GreenAsJade/demo-s3-swf-upload/tree/master

It's live at

 http://demo-s3-swf-upload.heroku.com/

Usage
=======

1. $ script/generate s3_swf_upload

2. Edit app/controller/s3_uploads_controller.rb

   You need to skip any authentication for this controller, the flash
   needs to be able to access it.  There's a big comment showing you
   where to do this :) 

3. Configure your amazon parameters.  Either set these through the
   following environment variables:

        AMAZON_S3_SWF_UPLOAD_BUCKET => my_public_bucket
        AMAZON_ACCESS_KEY_ID        => secret
        AMAZON_SECRET_ACCESS_KEY    => very secret
        AMAZON_S3_SWF_UPLOAD_ACL    => public-read
        AMAZON_S3_SWF_MAX_FILE_SIZE => 209715200

   or hardcode them in     config/amazon_s3.yml

    The acl will default to private.

   Your rails app can also change bucket, acl and max file size like
   this:

    S3SwfUpload::S3Config.bucket = 'different_one'
    S3SwfUpload::S3Config.acl = 'private'
    S3SwfUpload::S3Config.max_file_size = 1024
    
4. Upload a crossdomain.xml in your bucket and make it public-read.

   You can find what you need in generators/s3-swf-upload/templates in
   the plugin!

5. init s3_swf object:

  <%= s3_swf_upload_tag %>

6. When you click upload, your file will be upload to http://bucket.s3.amazonasw.com/ by default.

   IE the default prefix is '' (no prefix)

7. If you want to customise its behavior, here's a more complex example:

  <%= s3_swf_upload_tag(:width => 310, 
        :height => 40, 
        :success => 'alert("success");',
        :failed => 'alert("failed");',
        :selected => 'alert("selected");',
        :prefix => 'prefix_in_bucket',
        :initialMessage => 'Press this button to find the file to upload"
        :upload => 'Press Here To Activate Upload',
        :do_checks => '0') 
  %>

  In this case, files will be uploaded to http://bucket.s3.amazonasw.com/prefix_in_bucket/filename

8. If you need to check that the file they have selected is
   legitimate, before it gets uploaded, (for example, to make sure
   they aren't overwriting a file of the same name your database
   knows is already uploaded):

   i) Supply a method s3_swf_upload_error? in your application.rb to
      check, like this:

   def s3_swf_upload_file_error?(filename)
     Mod.find_by_zip_name(File::basename(filename)) ?
     "Sorry, there is already a mod with that zip file name!" :
     nil
   end

      Note that this method must return nil if there no error.

   ii) Set the option

     :do_checks => '1'

      in the s3_swf_upload_tag

Copyright (c) 2008 elctech, released under the MIT license
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