HttpException 请求超时

Question

我可以通过这个网址进入我的浏览器并获取服务器时间，https://api.binance.je/api/v3/time

但我无法使用以下代码获得响应。我该如何调试这个

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

问题出在我的 vpn 上。即使我没有活跃的连接。我杀死了后台服务并重新启动它，现在正在工作

类似的问题 httpclient-getasync-times-out-when-connected-to-vpn

Answer 2

我看到您可以从网站上检索 json 数据。在我这边测试了这个。 但是，如果您尝试获取该值，则只需读取 json 字符串（responsefromServer）。这可以通过使用名为 Newtonsoft 的 nuget 包来完成。 然后您必须将以下内容添加到您的代码中。

命名空间之上：

using Newtonsoft.Json.Linq;

在关闭阅读器enz之前的main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();
        }
    }
}