init commit

.gitignore

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+.DS_Store
+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp

.rspec

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+--color
+--format documentation

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in s3_direct_upload.gemspec
+gemspec
+gem 'rspec'
+gem 'jquery-fileupload-rails'

LICENSE

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+Copyright (c) 2012 Wayne
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# S3DirectUpload
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 's3_direct_upload'
+
+Then add a new initalizer with this code:
+```
+S3DirectUpload.config do |c|
+  c.access_key_id = ""       # your access key id
+  c.secret_access_key = ""   # your secret access key
+  c.bucket = ""              # your bucket name
+end
+```
+
+S3 Cors Config should look like this:
+```
+<CORSConfiguration>
+    <CORSRule>
+        <AllowedOrigin>http://0.0.0.0:3000</AllowedOrigin>
+        <AllowedMethod>GET</AllowedMethod>
+        <AllowedMethod>POST</AllowedMethod>
+        <AllowedMethod>PUT</AllowedMethod>
+        <MaxAgeSeconds>3000</MaxAgeSeconds>
+        <AllowedHeader>*</AllowedHeader>
+    </CORSRule>
+</CORSConfiguration>
+```
+
+This gem requires the gem "jquery-fileupload-rails", which is already included by the gem.
+
+You will need to add the following jquery-fileupload assets to your asset pipeline:
+
+application.js
+```
+//= require jquery-fileupload/basic
+//= require jquery-fileupload/vendor/tmpl
+```
+## Usage
+
+Create a new view that uses the helper:
+```
+<%= s3_uploader_form post: paintings_url, as: "painting[image_url]" do %>
+  <%= file_field_tag :file, multiple: true %>
+<% end %>
+```
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Added some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request

Rakefile

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+#!/usr/bin/env rake
+require "bundler/gem_tasks"

lib/s3_direct_upload.rb

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+require "s3_direct_upload/version"
+
+require 'base64'
+require 'openssl'
+require 'digest/sha1'
+
+require 's3_direct_upload/config_aws'
+require 's3_direct_upload/form_helper'
+require 's3_direct_upload/engine'
+
+ActionView::Base.send(:include, S3DirectUpload::UploadHelper) if defined?(ActionView::Base)

lib/s3_direct_upload/config_aws.rb

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+require "singleton"
+
+module S3DirectUpload
+  class Config
+    include Singleton
+
+    ATTRIBUTES = [:access_key_id, :secret_access_key, :bucket]
+
+    attr_accessor *ATTRIBUTES
+  end
+
+  def self.config
+    if block_given?
+      yield Config.instance
+    end
+    Config.instance
+  end
+end

lib/s3_direct_upload/engine.rb

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+module S3DirectUpload
+  class Engine < ::Rails::Engine 
+  end
+end

lib/s3_direct_upload/form_helper.rb

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+module S3DirectUpload
+  module UploadHelper
+    def s3_uploader_form(options = {}, &block)
+      uploader = S3Uploader.new(options)
+      form_tag(uploader.url, uploader.form_options) do
+        uploader.fields.map do |name, value|
+          hidden_field_tag(name, value)
+        end.join.html_safe + capture(&block)
+      end
+    end
+
+    class S3Uploader
+      def initialize(options)
+        @options = options.reverse_merge(
+          id: "fileupload",
+          aws_access_key_id: S3DirectUpload.config.access_key_id,
+          aws_secret_access_key: S3DirectUpload.config.secret_access_key,
+          bucket: S3DirectUpload.config.bucket,
+          acl: "public-read",
+          expiration: 10.hours.from_now,
+          max_file_size: 500.megabytes,
+          as: "file"
+        )
+      end
+
+      def form_options
+        {
+          id: @options[:id],
+          method: "post",
+          authenticity_token: false,
+          multipart: true,
+          data: {
+            post: @options[:post],
+            as: @options[:as]
+          }
+        }
+      end
+
+      def fields
+        {
+          :key => key,
+          :acl => @options[:acl],
+          :policy => policy,
+          :signature => signature,
+          "AWSAccessKeyId" => @options[:aws_access_key_id],
+        }
+      end
+
+      def key
+        @key ||= "uploads/#{SecureRandom.hex}/${filename}"
+      end
+
+      def url
+        "https://#{@options[:bucket]}.s3.amazonaws.com/"
+      end
+
+      def policy
+        Base64.encode64(policy_data.to_json).gsub("\n", "")
+      end
+
+      def policy_data
+        {
+          expiration: @options[:expiration],
+          conditions: [
+            ["starts-with", "$utf8", ""],
+            ["starts-with", "$key", ""],
+            ["content-length-range", 0, @options[:max_file_size]],
+            {bucket: @options[:bucket]},
+            {acl: @options[:acl]}
+          ]
+        }
+      end
+
+      def signature
+        Base64.encode64(
+          OpenSSL::HMAC.digest(
+            OpenSSL::Digest::Digest.new('sha1'),
+            @options[:aws_secret_access_key], policy
+          )
+        ).gsub("\n", "")
+      end
+    end
+  end
+end

lib/s3_direct_upload/version.rb

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+module S3DirectUpload
+  VERSION = "0.0.1"
+end

s3_direct_upload.gemspec

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+# -*- encoding: utf-8 -*-
+require File.expand_path('../lib/s3_direct_upload/version', __FILE__)
+
+Gem::Specification.new do |gem|
+  gem.authors       = ["Wayne"]
+  gem.email         = ["[email protected]"]
+  gem.description   = %q{Direct Upload to Amazon S3 With CORS}
+  gem.summary       = %q{Gives a form helper for Rails which allows direct uploads to s3}
+  gem.homepage      = ""
+
+  gem.files         = `git ls-files`.split($\)
+  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
+  gem.name          = "s3_direct_upload"
+  gem.require_paths = ["lib"]
+  gem.version       = S3DirectUpload::VERSION
+
+  gem.add_dependency 'rails', '~> 3.2'
+  gem.add_dependency 'jquery-fileupload-rails', '~> 0.3.4'
+end

spec/existance_spec.rb

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+require 'spec_helper'
+describe S3DirectUpload do
+  it "version must be defined" do
+    S3DirectUpload::VERSION.should be_true
+  end
+
+  it "config must be defined" do
+    S3DirectUpload.config.should be_true
+  end
+
+  it "engine must be defined"
+    pending
+  end
+
+  it "form helper must be defined"
+    pending
+  end
+end

spec/spec_helper.rb

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+require 's3_direct_upload'
+
+RSpec.configure do |config|
+  config.treat_symbols_as_metadata_keys_with_true_values = true
+  config.run_all_when_everything_filtered = true
+  config.filter_run :focus
+
+  config.order = 'random'
+end