Question

我正在尝试执行某种与CMD的Ping命令类似的操作，即它将向服务器发出请求，等待一段时间，然后他们声明此请求的数据包已丢失，该请求是在我坐在HttpClient对象的Timeout属性之前的合理时间内完成，但是一旦完成请求，请求就保持超时（在设置Timeout属性之前大约需要1000毫秒才能从服务器获取数据）。会有人知道为什么会这样吗？

public class TestPacketLoss
{
    private HttpClient _client;

    public TestPacketLoss()
    {
        _client = new HttpClient();
        _client.BaseAddress = new Uri("https://localhost:5001/api/");
        _client.Timeout = new TimeSpan(0, 0, 0, 0, 1500);
    }

    public async Task Start()
    {
        Stopwatch sw = new Stopwatch();
        long milliseconds = 0;
        int packetsLost = 0;
        for (int i = 0; i < 60; i++)
        {
            sw.Restart();

            HttpResponseMessage response;
            try
            {
                response = await _client.GetAsync("Temprature/");
                if (response.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    Console.WriteLine($"Request received in {sw.ElapsedMilliseconds} ms");

                    milliseconds += sw.ElapsedMilliseconds;
                }
                else
                {
                    packetsLost++;
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine($"Failed in {sw.ElapsedMilliseconds}");
                packetsLost++;
            }


        }

        Console.WriteLine($"Received 60 messages in avarage of {milliseconds / 60} ms");
        Console.WriteLine($"Number of packets lost {packetsLost}");
    }
}

更新

使用调试器进行的快速更新，我实际上发现，请求与失败之间经过的时间少于超时时间，这表明HttpClient计算超时的方式出了问题

设置超时属性时，HttpClient变慢

0 个答案: