如何在 MVC 4 控制器中获取客户端 IP 地址？

Question

I tried to get client IP adress in controller. It is working but sometimes I get this error:

The underlying connection was closed: An unexpected error occurred on a receive


        String IP = "";

        using (WebResponse response = request.GetResponse())
        {
            using (StreamReader stream = new StreamReader(response.GetResponseStream()))
            {
                IP = stream.ReadToEnd();
            }
        }

        int first = IP.IndexOf("Address: ") + 9;
        int last = IP.LastIndexOf("</body>");
        IP = IP.Substring(first, last - first);

Is there any different method for getting client IP address?

Answer 1

Either of these should work, from inside your Controller :

method 1:

string userIpAddress = this.Request.ServerVariables["REMOTE_ADDR"];

method 2:

string userIpAddress = this.Request.UserHostAddress;

Answer 2

try:

HttpContext.Request.UserHostAddress

http://msdn.microsoft.com/en-us/library/system.web.httprequest.userhostaddress%28v=vs.110%29.aspx

Answer 3

以下代码行帮助了我：

string ip = System.Web.HttpContext.Current.Request.UserHostAddress;

Answer 4

System.Web.HttpContext.Current.Request.UserHostAddress this gives user host address and it's not real request IP.

Request.ServerVariables["REMOTE_ADDR"] also returns the same.

Because if the request has been passed on by one, or more, proxy servers then the IP address returned by HttpRequest.UserHostAddress property will be the IP address of the last proxy server that relayed the request.

You can use this string manipulation to get the correct Ip of the request

string ipAddressInfo = request.ServerVariables["HTTP_X_FORWARDED_FOR"]; 
   
if (ipAddressInfo.Split(',') > 0){
  `string clientIpAddress = ipAddressInfo.Split(',')[0];`  

}