用淘宝ip地址库查ip

这是一个通过调用淘宝ip地址库实现ip地址查询的功能类

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;

 namespace LixinCommon
 {
     /// <summary>
     /// 淘宝IP地址库帮助类。
     /// 提供查询ip地址信息功能。
     /// 服务的主页:http://ip.taobao.com
     /// 作者：lixin
     /// 作者Email：[e-mail]
     /// 日期：2014年3月30日
     /// 备注：为了保障服务正常运行，每个用户的访问频率需小于10qps。
     /// </summary>
     public class TaobaoIPHelper
     {
         /// <summary>
         /// 查询ip信息
         /// </summary>
         /// <param name="ip"></param>
         /// <returns></returns>
         public static TaobaoIP GetIP(string ip)
         {
             System.Net.WebClient client = new System.Net.WebClient();
             try
             {
                 string data = client.DownloadString("http://ip.taobao.com/service/getIpInfo.php?ip=" + ip);
                 //当code==1时，表示失败
                 if (data.IndexOf("\"code\":1") > -)
                 {
                     return new TaobaoIP()
                     {
                         code = ,
                         errorMsg = data
                     };
                 }
                 using (System.IO.MemoryStream mm = new System.IO.MemoryStream(Encoding.UTF8.GetBytes(data)))
                 {
                     System.Runtime.Serialization.Json.DataContractJsonSerializer myJson = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(TaobaoIP));
                     TaobaoIP item = (TaobaoIP)myJson.ReadObject(mm);

                     return item;
                 }
             }
             catch (Exception ex)
             {
                 return new TaobaoIP()
                 {
                     code = ,
                     errorMsg = ex.Message,
                     data = new TaobaoIP_Data() { }
                 };
             }
         }
         /// <summary>
         /// 根据域名返回域名的ip信息
         /// </summary>
         /// <param name="domain"></param>
         /// <returns></returns>
         public static TaobaoIP[] GetDomain(string domain)
         {
             System.Net.IPAddress[] ips = System.Net.Dns.GetHostAddresses(domain);
             TaobaoIP[] result = new TaobaoIP[ips.Length];
             for (int i = , j = ips.Length; i < j; i++)
             {
                 result[i] = GetIP(ips[i].ToString());
             }
             return result;
         }
     }
     public struct TaobaoIP
     {
         /// <summary>
         /// 0：成功；1：失败
         /// </summary>
         public int code;
         /// <summary>
         /// ip响应信息
         /// </summary>
         public TaobaoIP_Data data;
         /// <summary>
         /// 错误信息
         /// </summary>
         [NonSerialized]
         public string errorMsg;
     }
     public struct TaobaoIP_Data
     {
         /// <summary>
         /// ip地址
         /// </summary>
         public string ip;
         /// <summary>
         /// 国家
         /// </summary>
         public string country;
         /// <summary>
         /// 区域
         /// </summary>
         public string area;
         /// <summary>
         /// 省份
         /// </summary>
         public string region;
         /// <summary>
         /// 城市
         /// </summary>
         public string city;
         /// <summary>
         /// 运营商
         /// </summary>
         public string isp;
         public string country_id;
         public string area_id;
         public string region_id;
         public string city_id;
         public string county_id;
         public string isp_id;
     }
 }

用法很简单，示例代码如下：

 TaobaoIP result1 = TaobaoIPHelper.GetIP("8.8.8.8");
 if (result1.code == )
 {
     Console.WriteLine(string.Format("调用成功。该ip的国家为{0},省份为{1},城市为{2},运营商为{3}"
         , result1.data.country, result1.data.region, result1.data.city, result1.data.isp)
         );
 }
 else
 {
     Console.WriteLine("失败，原因为："+result1.errorMsg);
 }
 TaobaoIP[] result2 = TaobaoIPHelper.GetDomain("lixin.me");
 foreach (TaobaoIP item in result2)
 {
     if (item.code == )
     {
         Console.WriteLine(string.Format("调用成功。该ip的国家为{0},省份为{1},城市为{2},运营商为{3}"
         , item.data.country, item.data.region, item.data.city, item.data.isp)
         );
     }
     else
     {
         Console.WriteLine("失败，原因为：" + item.errorMsg);
     }
 }