how to apply sync_clock option on S3 upload with CarrierWave in Ruby On Rails

Question

I got This error Every time due to difference between the request time and the current time is too large. I found that we need to apply sync_clock option but not able to configuration place.see my configuration please help us to configure to sync clock

Error :

  Expected(200) <=> Actual(403 Forbidden)
  request => {:headers=>{"Content-Length"=>54911, "Content-Type"=>"image/jpeg", "x-amz-acl"=>"public-read", "Cache-Control"=>"max-age=315576000", "Date"=>"Thu, 24 Oct 2013 01:14:14 +0000", "Authorization"=>"changed", "Host"=>"changed"}, :host=>"changed", :mock=>nil, :path=>"/uploads%2Fproject%2Fimage_1%2F697%2FHamburg-Speicher-im-Bau-090825.jpg", :port=>"443", :query=>nil, :scheme=>"https", :body=>#<File:/app/tmp/carrierwave/20131024-0114-2-7499/Hamburg-Speicher-im-Bau-090825.jpg>, :expects=>200, :idempotent=>true, :method=>"PUT"}
  response => #<Excon::Response:0x0000000b72f0a0 @body="<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Error><Code>RequestTimeTooSkewed</Code><Message>The difference between the request time and the current time is too large.</Message><MaxAllowedSkewMilliseconds>900000</MaxAllowedSkewMilliseconds><RequestId>EA8E8FF76B54D7F3</RequestId><HostId>/RiS+pn3JcKzOoArMhFRYmSBRYwRAptugp8W32XAT4vupukmxMCtHRKIHy7wy9BL</HostId><RequestTime>Thu, 24 Oct 2013 01:14:14 +0000</RequestTime><ServerTime>2013-10-24T01:29:49Z</ServerTime></Error>", @headers={"x-amz-request-id"=>"EA8E8FF76B54D7F3", "x-amz-id-2"=>"/RiS+pn3JcKzOoArMhFRYmSBRYwRAptugp8W32XAT4vupukmxMCtHRKIHy7wy9BL", "Content-Type"=>"application/xml", "Transfer-Encoding"=>"chunked", "Date"=>"Thu, 24 Oct 2013 01:29:47 GMT", "Connection"=>"close", "Server"=>"AmazonS3"}, @status=403>
  vendor/bundle/ruby/1.9.1/gems/excon-0.6.6/lib/excon/connection.rb:190:in `request' 

initializer

  CarrierWave.configure do |config|
  if Rails.env.production?
    config.fog_directory  = 'ese-prod'
    config.fog_host       = 'https://s3.amazonaws.com/ese-prod'
  else
    config.fog_directory  = 'ese-dev'
    config.fog_host       = 'https://s3.amazonaws.com/ese-dev'
  end
  if Rails.env.production? || Rails.env.development?

    config.fog_credentials = {
       :provider               => 'AWS',
       :aws_access_key_id      => 'AAAAAAAAAAA',
       :aws_secret_access_key  => 'BBBBBBBBBBBB',
       :region                 => 'us-east-1'
     }
    config.fog_public     = true
    config.fog_attributes = {'Cache-Control' => 'max-age=315576000'}

    config.root = Rails.root.join('tmp') # adding these...
    config.cache_dir = 'carrierwave' # ...two lines

  # elsif Rails.env.development?
  #  config.storage = :file
  else
    config.storage = :file
  end
end

uploder

class ImageUploader < CarrierWave::Uploader::Base

  include CarrierWave::MiniMagick
  if Rails.env.production? || Rails.env.development?
    storage :fog
  else
    storage :file
  end

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  version :thumb do
    process :resize_to_limit => [50, 50]
  end

  version :partner do
    process :resize_to_limit => [150, 150]
  end

  def extension_white_list
    %w(jpg jpeg gif png)
  end
end

Answer 1

This is, unfortunately, a thing that happens. Thankfully there is a fix.

In the initializer you should be able to do something like this:

Fog::Storage.new(fog_credentials).sync_clock

You should be able to use the same values that you are passing to config in your initializer for fog_credentials here. sync_clock makes a simple request to S3 and stores the offset (and then modifies timestamps it sends by the offset). So that should ensure you won't see this error any more (though it shouldn't come up that often, ie if you redeploy to heroku, the new dynos probably would not have the skew still). Hope that clears it up, but happy to help more if needed.