myModule.factory('myHttpInterceptor', function ($q) {
    return {
        response: function (response) {
            // do something on success
            if(response.headers()['content-type'] === "application/json; charset=utf-8"){
                // Validate response, if not ok reject
                var data = examineJSONResponse(response); // assumes this function is available

                if(!data)
                    return $q.reject(response);
            }
            return response;
        },
        responseError: function (response) {
            // do something on error
            return $q.reject(response);
        }
    };
});
myModule.config(function ($httpProvider) {
    $httpProvider.interceptors.push('myHttpInterceptor');
});