HttpClient的当超时设置挂机（Windows手机） [英] HttpClient hangs when timeout is setting (Windows Phone)

问题描述

我试图超时设置为的HttpClient 对象的Windows Phone应用程序。但是，如果请求没有超时前完成， GetAsync 从不返回一个值。

I'm trying to set timeout to HttpClient object in Windows Phone App. But if request is not completed before timeout, GetAsync never returns a value.

我用下面的code得到响应：

I'm using the following code to get response:

HttpClientHandler handler = new HttpClientHandler();
HttpClient client = new HttpClient(handler);
client.Timeout = TimeSpan.FromSeconds(5);
client.BaseAddress = new Uri("http://www.foo.com");
HttpResponseMessage response = await client.GetAsync("/boo.mp3");//<--Hangs
byte[] data = await response.Content.ReadAsByteArrayAsync();

我

如何正确设置超时摆脱GetAsync结果呢？

How can I properly set the timeout to get result from GetAsync?

推荐答案

从<一个拍摄href=\"https://msdn.microsoft.com/en-us/library/system.net.http.httpclient.timeout%28v=vs.110%29.aspx\"相对=nofollow> HttpClient的文档：

默认值为100,000毫秒（100秒）。

The default value is 100,000 milliseconds (100 seconds).

一个域名系统（DNS）查询可能需要长达15秒返回
  或超时。如果您的请求包含需要主机名
  分辨率并设置为超时值小于15秒，它可能
  需要15秒以上引发WebException指示之前
  超时您的要求。

A Domain Name System (DNS) query may take up to 15 seconds to return or time out. If your request contains a host name that requires resolution and you set Timeout to a value less than 15 seconds, it may take 15 seconds or more before a WebException is thrown to indicate a timeout on your request.

和ZombieSheep指出5秒钟甚至不够一个DNS查询来完成。

and as ZombieSheep notes 5 seconds are not enough even for a DNS query to complete.

我会建议取消超时，以及让它是默认值，因为据我所知，以检查，如果任务剪掉站是假设，如果你ping服务器的唯一途径，它回复的连接还是OK和工作/下载你的文件。

I would suggest removing the timeout as well and let it to is default value, since from what I know the only way to "check" if task didnt stop is by assuming that if you ping the server and it replies the connection is still "OK" and working/downloading your file.

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