code: function SignatureBaseString(httpMethod, url, parameters) {
  		parameters = new ParametersLoader(parameters).get();
  		this._httpMethod = new HttpMethodElement(httpMethod).get();
  		this._url = new UrlElement(url).get();
  		this._parameters = new ParametersElement(parameters).get();
  		this._rfc3986 = new Rfc3986();
  	}
docs: Specification: http://oauth.net/core/1.0/#anchor14 url: if the scheme is missing, http will be added automatically