角 - 使用Restangular时，放弃Ajax请求 [英] Angular - abort ajax request when using Restangular

问题描述

我有一个调用一个角度的服务，从而使通过服务一个Ajax请求的方法。我需要确保，如果这就是所谓的好几倍，在中止（如果它尚未解决的即是）在previous请求。

I have a method that calls an angular service and consequently makes an ajax request via the service. I need to make sure that if this is called several times, the previous request in aborted (if it hasn't already been resolved that is).

此方法可以得到多次调用。这种方法实际上是从ngTable是 ngTableParams ：

This method can get called multiple times. This method is actually from ngTable on ngTableParams:

getData = function($defer, params) {

      myService.getRecord(params).then(function(res){ 
             ...
             $defer.resolve(res.Records);
      }); 
}

下面是关于服务的方法：

Here's the method on the service:

this.getRecords = function(params) {
    ...

    return Restangular
          .all('/api/records')
          .post(filters);
};

如果ngTable使得3个电话我希望第一个2中止（当然，除非他们返回如此之快，它得到了解决）

If ngTable makes 3 calls I want the first 2 to be aborted (unless of course they returned so fast that it got resolved)

推荐答案

可以中止 $ HTTP 通过超时通话配置属性，它可以是一个承诺，即中止解决当请求。

You can abort $http calls via the timeout config property, which can be a Promise, that aborts the request when resolved.

因此​​，在restangular，你可以做到这一点像

So in restangular, you can do this like

var abort = $q.defer();
Restangular.one('foos', 12345).withHttpConfig({timeout: abort.promise}).get();
abort.resolve();

要它与你的用例整合，例如，你可以在你的服务有这样的：

To integrate it with your usecase, for example, you could have this in your service:

var abortGet;

this.getRecords = function(params) {
  ...
  if (abortGet) abortGet.resolve();
  abortGet = $q.defer();
  return Restangular
    .all('/api/records')
    .withHttpConfig({timeout: abortGet.promise})
    .post(filters);
}

这三方通话 getRecords 总是中止previous呼叫如果尚未解决！

This way calling getRecords always aborts the previous call if has not been resolved yet!

希望这有助于！

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