Question

在Mac OS X上对Mono（3.2.1）执行这个简单的小测试时，它从不打印任何对控制台的响应，而是说Shutting down finalizer thread timed out.
这段代码有问题还是我的Mono行为不端？

using System;
using System.Net.Http;

namespace VendTest
{
  class MainClass
  {
        public static void Main(string[] args)
        {
            Client client = new Client();
            client.HttpClientCall();
        }
    }

    public class Client
    {
        HttpClient client;

        public Client()
        {
            client = new HttpClient();
        }

        public async void HttpClientCall()
        {
            HttpClient httpClient = new HttpClient();
            HttpResponseMessage response = await httpClient.GetAsync("http://vendhq.com");
            string responseAsString = await response.Content.ReadAsStringAsync();
            Console.WriteLine(responseAsString);
        }
    }
}

Answer 1

你几乎不应该使用async void方法，这就是原因之一。您的Main()将在HttpClientCall()实际完成之前结束。由于退出Main()会终止整个应用程序，因此不会打印任何内容。

您应该在async Task中将方法更改为Wait()和Main()。（混合使用await和Wait()通常会导致死锁，但它是适用于控制台应用程序的正确解决方案。）

class MainClass { public static void Main() { new Client().HttpClientCallAsync().Wait(); } } public class Client { HttpClient client = new HttpClient(); public async Task HttpClientCallAsync() { HttpClient httpClient = new HttpClient(); HttpResponseMessage response = await httpClient.GetAsync("http://vendhq.com"); string responseAsString = await response.Content.ReadAsStringAsync(); Console.WriteLine(responseAsString); } }

简单的HttpClient测试在Mono上失败

1 个答案: