c# 快速验证代理IP是否有用
public void yanzhen(string str, int port)
{
WebProxy proxyObject = new WebProxy(str, port);//str为IP地址 port为端口号
HttpWebRequest Req = (HttpWebRequest)WebRequest.Create("http://www.whatismyip.com.tw/");
Req.Proxy = proxyObject; //设置代理
HttpWebResponse Resp = (HttpWebResponse)Req.GetResponse();
string str = "";
string OkStr = "";
Encoding code = Encoding.GetEncoding("UTF-8");
using (StreamReader sr = new StreamReader(Resp.GetResponseStream(), code))
{
if (sr != null)
{
try
{
str = sr.ReadToEnd();
StringSub.substr(str, "<h2>", "</h2>", 0);
str = str.Substring(str.IndexOf(start) + start.Length);
OkStr = str.Substring(0, str.IndexOf(last));
MessageBox.Show("验证成功!显示IP为" + OkStr);
}
catch
{
MessageBox.Show("文件读取失败!");
}
finally
{
sr.Close();
}
}
}
}
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