Module: AdCopy::ControllerMethods

Included in:
ActionController::Base
Defined in:
lib/controller_methods.rb

Overview

Methods within this module will be included in ActionController::Base

Instance Method Summary collapse

Instance Method Details

#verify_adcopy_puzzle(options = {}) ⇒ Object

Sends a POST request to the AdCopy server in order to verify the user’s input. Returns true if the user’s input is valid, false otherwise

Options:

:validate_response

Whether or not the AdCopy authenticator should be used to validate the server’s response. If this is set to true and the validation fails, an AdCopyError is raised.

:timeout

The amount of time in seconds before the request should timeout. If the request times out, a Timeout::Error is raised.

:model

An ActiveRecord model. If verification fails, an error will be added to this model.

:error_message

A custom error message (to be used in conjunction with :model) to be used if verification fails.



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# File 'lib/controller_methods.rb', line 14

def verify_adcopy_puzzle(options = {})
  AdCopy::check_for_keys!
  options = { :validate_response  => true,
              :timeout            => 5,
              :model              => nil,
              :error_message      => nil
            }.merge(options)
  
  #Send POST to AdCopy
  response = nil
  Timeout::timeout(options[:timeout]) do
    response = Net::HTTP.post_form URI.parse("#{AdCopy::VERIFY_SERVER}/papi/verify"), {
      "privatekey"  =>  AdCopy::CONFIG['V_KEY'],
      "challenge"   =>  params[:adcopy_challenge],
      "response"    =>  params[:adcopy_response],
      "remoteip"    =>  request.remote_ip
    }
  end
  answer, error, authenticator = response.body.split("\n")
  
  #validate the response
  if options[:validate_response] && authenticator != Digest::SHA1.hexdigest("#{answer}#{params[:adcopy_challenge]}#{AdCopy::CONFIG['H_KEY']}")
    raise AdCopyError, "AdCopy Error: Unable to Validate Response" 
  end
  
  if answer.downcase == "true"
    return true
  else
    #Add error to the model
    if options[:model]
      options[:model].valid?
      options[:model].errors.add_to_base options[:error_message] || "AdCopy Puzzle: #{error}"
    end
    
    return false
  end
end