HttpException请求超时

Question

我可以将这个url输入到我的浏览器中，得到服务器时间https://api.binance.je/api/v3/time

但是我无法使用下面的代码得到响应。我如何调试它？

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a request for the URL.        
            WebRequest request = WebRequest.Create("https://api.binance.je/api/v3/time");
            // If required by the server, set the credentials.
            request.Credentials = CredentialCache.DefaultCredentials;
            // Get the response.
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            // Display the status.
            Console.WriteLine(response.StatusDescription);
            // Get the stream containing content returned by the server.
            Stream dataStream = response.GetResponseStream();
            // Open the stream using a StreamReader for easy access.
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            // Display the content.
            Console.WriteLine(responseFromServer);
            // Cleanup the streams and the response.
            reader.Close();
            dataStream.Close();
            response.Close();
        }
    }
}

Answer 1

我看到您能够从网站检索json数据。在我这边做了测试。但是，如果您只想获取值，则需要读取json字符串(responsefromServer)。这可以通过使用一个名为Newtonsoft的nuget包来完成。然后，您必须将以下内容添加到代码中。

以上命名空间：

using Newtonsoft.Json.Linq;

在关闭阅读器enz之前的主函数中：

        //Create jsonObject object from the api call response
        JObject jObject = JObject.Parse(responseFromServer);
        //Read propertie called serverTime and convert this to string to match variabele set
        string time = jObject["serverTime"].ToString();
        //Write the given time
        Console.WriteLine(time);

您的代码将如下所示：

using Newtonsoft.Json.Linq;
using System;
using System.IO;
using System.Net;

namespace StackOverflow
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            // Create a request for the URL.        
            WebRequest request = WebRequest.Create("https://api.binance.je/api/v3/time");
            // If required by the server, set the credentials.
            request.Credentials = CredentialCache.DefaultCredentials;
            // Get the response.
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            // Display the status.
            Console.WriteLine(response.StatusDescription);
            // Get the stream containing content returned by the server.
            Stream dataStream = response.GetResponseStream();
            // Open the stream using a StreamReader for easy access.
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            // Display the content.
            Console.WriteLine(responseFromServer);


            //Create jsonObject object from the api call response
            JObject jObject = JObject.Parse(responseFromServer);
            //Read propertie called serverTime and convert this to string to match variabele set
            string time = jObject["serverTime"].ToString();
            //Write the given time
            Console.WriteLine(time);


            // Cleanup the streams and the response.
            reader.Close();
            dataStream.Close();
            response.Close();
        }
    }
}

Answer 2

问题出在我的vpn上。即使我没有一个活跃的连接。我关闭了后台服务并重新启动了它，现在正在工作

类似问题httpclient-getasync-times-out-when-connected-to-vpn