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【ASP.NET 进阶】根据IP地址返回对应位置信息

2015-12-28 19:43 477 查看
其实就是使用了百度的IP库的功能接口,然后处理下就行了,效果图如下:



准备工作:

1.注册成为开度开发者,创建应用获得百度API调用的AK秘钥,百度开发中心地址:http://developer.baidu.com/

2.API 地址: http://developer.baidu.com/map/index.php?title=webapi/ip-api#.E4.BD.BF.E7.94.A8.E6.96.B9.E6.B3.95

3.准备开发咯,步骤如下:

(1)获取客户端IP

/// <summary>获取客户端IP地址(无视代理)</summary>
/// <returns>若失败则返回回送地址</returns>
public static string GetHostAddress()
{
string userHostAddress = HttpContext.Current.Request.UserHostAddress;

if (string.IsNullOrEmpty(userHostAddress))
{
userHostAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}

//最后判断获取是否成功,并检查IP地址的格式(检查其格式非常重要)
if (!string.IsNullOrEmpty(userHostAddress) && IsIP(userHostAddress))
{
return userHostAddress;
}
return "127.0.0.1";
}

/// <summary>
/// 检查IP地址格式
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static bool IsIP(string ip)
{
return System.Text.RegularExpressions.Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");


(2)获取编码服务地址

private const string THE_KEY = "***************"; //你的AK密钥
/// <summary>返回UTF-8编码服务地址</summary>
/// <returns>服务地址</returns>
public string GetPostUrl(string theIP)
{
string postUrl = "http://api.map.baidu.com/location/ip?ak=" + THE_KEY + "&ip=" + theIP + "&coor=bd09ll";
return postUrl;
}


(3)通过服务地址,得到地址解析结果

/// <summary> 返回结果(地址解析的结果) </summary>
public static string GetInfoByUrl(string url)
{
//调用时只需要把拼成的URL传给该函数即可。判断返回值即可
string strRet = null;

if (url == null || url.Trim().ToString() == "")
{
return strRet;
}
string targeturl = url.Trim().ToString();
try
{
HttpWebRequest hr = (HttpWebRequest)WebRequest.Create(targeturl);
hr.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
hr.Method = "GET";
hr.Timeout = 30 * 60 * 1000;
WebResponse hs = hr.GetResponse();
Stream sr = hs.GetResponseStream();
StreamReader ser = new StreamReader(sr, Encoding.Default);
strRet = ser.ReadToEnd();
}
catch (Exception ex)
{
strRet = null;
}
return strRet;
}


(4)最后简单的调用上面的方法,然后转换下字符串中的转义字符

string theIP = YMethod.GetHostAddress();
string msg = YMethod.GetInfoByUrl(GetPostUrl(theIP));
msg = System.Text.RegularExpressions.Regex.Unescape(msg);
Response.Write(msg);
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