使用Angular中的$ q实现，如何才能使promise循环直到成功? [英] Using the $q implementation in Angular how can I loop a promise until success?

问题描述

根据我最近的其他问题，我正在尝试将数据持久保存到针对移动设备(不稳定的连接)的角度应用程序的服务器，因此它应该一直尝试请求，直到成功为止.

As per my other recent questions, I'm trying to persist data to a server for an angular application that's targeted at mobile devices (unstable connections), so it should keep trying the request until success.

我该如何兑现承诺?

此刻我有:

服务:

 this.addObject = function addObject(object) {
        var deferred = $q.defer();

      var httpConfig = {
        method: 'POST',
        url: 'http://api.foo.com/bar',
        data: object
      }

      setTimeout(function() {
          $http(httpConfig).
              success(function(data, status) {
                  deferred.resolve('Woohoo!');
              }).
              error(function(data, status) {
                  deferred.reject('Couldnt reach server this time...');
              });
      }, 3000);

        return deferred.promise;
    }

控制器:

myService.addObject(myObject)
            .then(function(message) {
                console.log(message);
            }, function(message) {
                console.log(message);
            });

我无法删除拒绝回调，因为没有它，代码似乎无法执行，但是一旦调用拒绝，它就会中断setTimeout循环.我该如何强迫诺言重复直到成功回调?

I can't remove the reject callback, as the code won't seem to execute without it, but once the reject is called, it breaks the setTimeout loop. How can I force the promise to repeat until the success callback?

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