soap.rb

require 'savon'
HTTPI.log = false

username = "XXXXXXX"
password = "XXXXXXX"

Savon.configure do |config|

  # The XML logged by Savon can be formatted for debugging purposes.
  # Unfortunately, this feature comes with a performance and is not
  # recommended for production environments.
  config.pretty_print_xml = true

  # Savon raises SOAP and HTTP errors, but you can disabling this behavior.
  config.raise_errors = true

  # The XML namespace identifier used for the SOAP envelope defaults to :env
  # but can be configured to use a different identifier. If you need this
  # feature, please open a ticket because Savon should figure out the
  # namespace and identifier itself.
  config.env_namespace = :s

end

client = Savon::Client.new do
  wsdl.document = "http://services.carsolize.com/BookingServices/dynamicdataservice.svc?wsdl"
  #wsdl.endpoint = "https://services.carsolize.com/BookingServices/dynamicdataservice.svc"
  #wsdl.namespace = ""
  #http.headers = { "Accept-Encoding" => "gzip, deflate", "Connection" => "Keep-Alive" }
end


response = client.request "ServiceRequest", "xmlns" => "http://tempuri.org/" do |soap, wsdl|
  client.http.headers["SOAPAction"] = '"http://tempuri.org/IDynamicDataService/ServiceRequest"'
  soap.body = {
    "rqst" => {
      "Credentials" => {
        "UserName" => username,
        "Password"  => password
      },
      "RequestType" => "Login", 
      "TypeOfService" => "Unknown",
    },
  }
end

p response