interceptor.js

(function(angular){
	angular.module('app.lib.http.interceptorRequestFormatter', ['nvision.lib.xmlRequestFormatter'])
	.config(['$httpProvider',function($httpProvider) {
  		$httpProvider.interceptors.push('InterceptorRequestFormatter');
	}])
	.factory('InterceptorRequestFormatter', ['XmlRequestFormatter', InterceptorRequestFormatterProvider]);

	function InterceptorRequestFormatterProvider(XmlRequestFormatter){

		// Formats the request data
		// @reqData is a json string
		// @return is a json string
		function formatDataToXml(reqData){
			var endJson = XmlRequestFormatter.reqDataToXml(JSON.parse(reqData));
			return JSON.stringify(endJson);
		}

		return {
			request: function(config) {
				var  allowedWriteMethods = ['POST', 'PATCH', 'DELETE'];

				if(_.contains(allowedWriteMethods, config.method) &&
					!_.some(config.transformRequest, function(reqHandler){
						return reqHandler === formatDataToXml;
					})
					) {
					//try to use unshift to not have to do stringify
					config.transformRequest.push(formatDataToXml);
				}

				return config;
			}
		};
	}

}(window.angular));