Rails listener Paypal IPN always return INVALID

Question

I've build a listener for my IPN. I can receive the request via IPN Simulator and all the parameters are correct, but when I send it back to link for sending my request to make validations it will ALWAYS return INVALID.

I've tried changing the encoding on my PayPal account to UTF-8 but it didn't work.

I'm not using any gem for this and I'm not looking forward to this.

 class PaymentNotificationController  [:create] #Otherwise the request from PayPal wouldn't make it to the controller


  def create
    response = validate_IPN_notification(request.raw_post)
    case response
    when "VERIFIED"
      P 'worked'

    when "INVALID"
        p 'did not work'
    else
    end
    render :nothing => true, :status => 200, :content_type => 'text/html'
  end


  protected 

  

  def validate_IPN_notification(raw)

    uri = URI.parse('https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_notify-validate')
    #uri = URI.parse('https://www.paypal.com/cgi-bin/webscr?cmd=_notify-validate')
    http = Net::HTTP.new(uri.host, uri.port)
    http.open_timeout = 60
    http.read_timeout = 60
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
    http.use_ssl = true
    response = http.post(uri.request_uri, raw,
                         'Content-Length' => "#{raw.size}",
                         'User-Agent' => "My custom user agent"
                       ).body
  end
end

Please help me, I've been stuck with it all afternoon and can't get it figured out.

Answer 1

It turned out to be a Windows problem which I don't know how to fix.

I tried the same thing on my Ubuntu 15 and it worked perfectly.