“连接尝试失败，因为被连接方在一段时间后未正确响应”。使用WebClient [英] "A connection attempt failed because the connected party did not properly respond after a period of time" using WebClient

问题描述

我正在使用以下在本地计算机上运行的代码，但是当我在服务器上尝试相同的代码时，它会抛出错误

连接尝试失败，因为连接的一方在一段时间后未正确响应，或者建立的连接
因连接的主机未能响应而失败

这是我的代码：

  WebClient客户端= new WebClient（） ; 
 //添加用户代理标头，以防
 //请求的URI包含查询。 
 //client.Headers.Add（ ID， Mozilla / 4.0（兼容； MSIE 6.0； Windows NT 5.2； .NET CLR 1.0.3705;））； 
流数据= client.OpenRead（ http：// + Request.ServerVariables [ HTTP_HOST] + Request.ApplicationPath + /PageDetails.aspx?ModuleID= + ID）; 
 StreamReader reader = new StreamReader（data）; 
 string s = reader.ReadToEnd（）; 
 Console.WriteLine（s）; 
 data.Close（）; 
 reader.Close（）; 
  

我在

<$ p $上遇到错误p> 流数据= client.OpenRead（ http：// + Request.ServerVariables [ HTTP_HOST] + Request.ApplicationPath + /PageDetails.aspx?ModuleID= + ID）;


是否有任何防火墙设置？

解决方案

我遇到了类似的问题，不得不使用以下方法将URL从字符串转换为Uri对象：

  Uri myUri =新的Uri（URLInStringFormat，UriKind.Absolute）; 
  

（URLInStringFormat是您的URL）
尝试使用Uri而不是字符串进行连接：

  WebClient客户端= new WebClient（）; 
 client.OpenRead（myUri）; 
  

I am using the following code which is working on local machine, but when i tried the same code on server it throws me error

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

Here is my code:

WebClient client = new WebClient();
// Add a user agent header in case the 
// requested URI contains a query.
//client.Headers.Add ("ID", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
Stream data = client.OpenRead("http://" + Request.ServerVariables["HTTP_HOST"] + Request.ApplicationPath + "/PageDetails.aspx?ModuleID=" + ID);
StreamReader reader = new StreamReader(data);
string s = reader.ReadToEnd();
Console.WriteLine(s);
data.Close();
reader.Close();

I am getting error on

Stream data = client.OpenRead("http://" + Request.ServerVariables["HTTP_HOST"] + Request.ApplicationPath + "/PageDetails.aspx?ModuleID=" + ID);

is it due any firewall setting?

解决方案

I had a similar problem and had to convert the URL from string to Uri object using:

Uri myUri = new Uri(URLInStringFormat, UriKind.Absolute);

(URLInStringFormat is your URL) Try to connect using the Uri instead of the string as:

WebClient client = new WebClient();
client.OpenRead(myUri);

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