C#根据第三方提供的IP查询服务获取公网外网IP地址-开发框架文库

C#根据第三方提供的IP查询服务获取公网外网IP地址

标签：

C#根据第三方提供的IP查询服务获取公网外网IP地址

C# Code:

/// <summary>
/// C#根据第三方提供的IP查询服务获取公网外网IP地址
/// </summary>
/// <returns></returns>
public static string GetInterNetIPFromAPI()
{
//测试OK, 此接口查询速度最快
var html2 = HttpGetPageHtml("http://www.net.cn/static/customercare/yourip.asp", "gbk");
var ip2 = GetIPFromHtml(html2);
if (!String.IsNullOrEmpty(ip2)) return ip2;

//测试OK
var html1 = HttpGetPageHtml("https://www.ip.cn", "utf-8");
var ip1 = GetIPFromHtml(html1);
if (!String.IsNullOrEmpty(ip1)) return ip1;

//测试失败，不提供查询服务，需要购买api服务
var html3 = HttpGetPageHtml("http://www.ip138.com/ips138.asp", "gbk");
var ip3 = GetIPFromHtml(html3);
if (!String.IsNullOrEmpty(ip3)) return ip3;

return "";
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

C# Code:

/// <summary>
/// 获取页面html
/// </summary>
/// <param name="url">请求的地址</param>
/// <param name="encoding">编码方式</param>
/// <returns></returns>
private static string HttpGetPageHtml(string url, string encoding)
{
string pageHtml = string.Empty;
try
{
using (WebClient MyWebClient = new WebClient())
{
Encoding encode = Encoding.GetEncoding(encoding);
MyWebClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36");
MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据
Byte[] pageData = MyWebClient.DownloadData(url); //从指定网站下载数据
pageHtml = encode.GetString(pageData);
}
}
catch (Exception e)
{

}
return pageHtml;
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

C# Code:

/// <summary>
/// 从html中通过正则找到ip信息(只支持ipv4地址)
/// </summary>
/// <param name="pageHtml"></param>
/// <returns></returns>
private static string GetIPFromHtml(String pageHtml)
{
//验证ipv4地址
string reg = @"(?:(?:(25[0-5])|(2[0-4]\d)|((1\d{2})|([1-9]?\d)))\.){3}(?:(25[0-5])|(2[0-4]\d)|((1\d{2})|([1-9]?\d)))";
string ip = "";
Match m = Regex.Match(pageHtml, reg);
if (m.Success)
{
ip = m.Value;
}
return ip;
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

扫一扫加微信

原文链接：https://www.cscode.net/archive/newdoc/cs-210903193616648-80.html

NewDoc C/S框架网 2020-04-13 16:56 2020-04-13 16:56