post for mdata

test.js

      $http({
        method: 'POST',
        url: apiUrl + '/signup',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        data: data,
        transformRequest: function(obj) {
          var str = [];
          for( var p in obj )
            str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
          return str.join("&");
        },
      }).then(function(resp) {
        return q.resolve(resp.data);
      }, function(err) {
        return q.reject(err);
      });