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用ASP.Net编写的查询域名的程序

 2001-03-28 10:58:41 来源:WEB开发网   
核心提示:下面是源程序。<% @ Page Language="C#" %><% @ Assembly Name="System.Net" %><% @ Import Namespace="System.Net.Sockets" %>
下面是源程序。

<% @ Page Language="C#" %>
<% @ Assembly Name="System.Net" %>
<% @ Import Namespace="System.Net.Sockets" %>
<% @ Import Namespace="System.Text" %>
<% @ Import Namespace="System.IO" %>
<% @ Import Namespace="System.Collections" %>
<script language="C#" runat="server">
void doQuery(Object sender, EventArgs e)
{
 String strDomain = txtDomain.Text;
 char[] chSplit = {'.'};
 string[] arrDomain = strDomain.Split(chSplit);

 int nLength = arrDomain[1].Length ;
 Hashtable table = new Hashtable();
 table.Add("de", "whois.denic.de");
 table.Add("be", "whois.dns.be");
 table.Add("gov", "whois.nic.gov");
 table.Add("mil", "whois.nic.mil");

 String strServer ;     //define whois server
 //if the domainname's end is cn then the server is cnnic ,otherwise is networksolutions   
 if (arrDomain[arrDomain.Length - 1] == "cn")
  {
   strServer = "159.226.6.139" ;
  }  
 else
  {
   strServer = "whois.networksolutions.com";
  } 
  
 if (table.ContainsKey(arrDomain[1]))
 {
  strServer = table[arrDomain[1]].ToString();
 }
 else if (nLength == 2)
 {
  // 2-letter TLD's always default to RIPE in Europe
  strServer = "whois.ripe.net";
 }
 
 String strResponse;
 bool bSuccess = DoWhoisLookup(strDomain, strServer, out strResponse);
 if (bSuccess)
 {
  txtResult.Text = strResponse;
 }
 else
 {
  txtResult.Text = "Lookup failed";
 }
}

bool DoWhoisLookup(String strDomain, String strServer, out String strResponse)
{
 strResponse = "none";
 bool bSuccess = false;

 TCPClient tcpc = new TCPClient();
 if (0 == tcpc.Connect(strServer, 43))
 {
  strDomain += "\r\n";
  Byte[] arrDomain = Encoding.ASCII.GetBytes(strDomain.ToCharArray());
  try
  {
    String str;
Stream s = tcpc.GetStream();
    s.Write(arrDomain, 0, strDomain.Length);
  
    StreamReader sr = new StreamReader(tcpc.GetStream(), Encoding.Default);
    StringBuilder strBuilder = new StringBuilder();
    while (-1 != sr.Peek())
    {
     strBuilder.Append(sr.ReadLine()+"<br>");
 
    }
    tcpc.Close();
    
    bSuccess = true;
    strResponse = strBuilder.ToString();
  }
  catch(Exception e)
  {
    strResponse = e.ToString();
  }
  
  return bSuccess;
 }
 else
 {
  strResponse = "Could not connect to Whois server";
  return false;
 }

 return false;
}
</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
</head>
<body>

<form runat="server">
Domain name: WWW . <asp:TextBox id="txtDomain" value="" runat="server" />
 <asp:Button id="btnQuery" OnClick="doQuery" text="Query!" runat="server" />
<BR><HR width="100%"><BR>
<asp:label id="txtResult" runat="server" />
</form>

</body>
</html>


Tags:ASP Net 编写

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