Asp-Net Web API 2.1获取客户端IP地址

HttpContext.Current.Request.UserHostAddress;

public static class HttpRequestMessageExtensions
    {
        private const string HttpContext = "MS_HttpContext";
        private const string RemoteEndpointMessage = "System.ServiceModel.Channels.RemoteEndpointMessageProperty";
        public static string GetClientIpAddress(this HttpRequestMessage request)
        {
            if (request.Properties.ContainsKey(HttpContext))
            {
                dynamic ctx = request.Properties[HttpContext];
                if (ctx != null)
                {
                    return ctx.Request.UserHostAddress;
                }
            }
            if (request.Properties.ContainsKey(RemoteEndpointMessage))
            {
                dynamic remoteEndpoint = request.Properties[RemoteEndpointMessage];
                if (remoteEndpoint != null)
                {
                    return remoteEndpoint.Address;
                }
            }
            return null;
        }
    }

以下链接可能会对您有所帮助。以下是来自以下链接的代码。

参考：通过asp-net-web-api获取客户端ip

using System.Net.Http;
using System.ServiceModel.Channels;
using System.Web;
using System.Web.Http;

namespace Trikks.Controllers.Api
{
    public class IpController : ApiController
    {
          public string GetIp()
          {
                return GetClientIp();
          }
          private string GetClientIp(HttpRequestMessage request = null)
          {
                request = request ?? Request;
                if (request.Properties.ContainsKey("MS_HttpContext"))
                {
                      return   ((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
                }
                else if (request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
                {
                     RemoteEndpointMessageProperty prop = (RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
                     return prop.Address;
                }
                else if (HttpContext.Current != null)
                {
                    return HttpContext.Current.Request.UserHostAddress;
                }
                else
                {
                      return null;
                }
           }
     }
}

另一种方法如下。

参考：如何访问客户端-ip地址

对于网络托管版本

string clientAddress = HttpContext.Current.Request.UserHostAddress;

对于自托管

object property;
        Request.Properties.TryGetValue(typeof(RemoteEndpointMessageProperty).FullName, out property);
        RemoteEndpointMessageProperty remoteProperty = property as RemoteEndpointMessageProperty;

使用Web API 2.2:Request.GetOwinContext().Request.RemoteIpAddress

尝试使用获取Ip

ip = HttpContext.Current != null ? HttpContext.Current.Request.UserHostAddress : "";

我认为这是最清晰的解决方案，使用了一种扩展方法：

public static class HttpRequestMessageExtensions
{
    private const string HttpContext = "MS_HttpContext";
    private const string RemoteEndpointMessage = "System.ServiceModel.Channels.RemoteEndpointMessageProperty";
    public static string GetClientIpAddress(this HttpRequestMessage request)
    {
        if (request.Properties.ContainsKey(HttpContext))
        {
            dynamic ctx = request.Properties[HttpContext];
            if (ctx != null)
            {
                return ctx.Request.UserHostAddress;
            }
        }
        if (request.Properties.ContainsKey(RemoteEndpointMessage))
        {
            dynamic remoteEndpoint = request.Properties[RemoteEndpointMessage];
            if (remoteEndpoint != null)
            {
                return remoteEndpoint.Address;
            }
        }
        return null;
    }
}

所以就这样使用吧：

var ipAddress = request.GetClientIpAddress();

我们在项目中使用这个。

来源/参考：在ASP中检索客户端的IP地址。NET Web API

回复这篇4年前的文章，因为这对我来说似乎过于复杂了，至少如果你在IIS上托管的话。

以下是我解决问题的方法：

using System;
using System.Net;
using System.Web;
using System.Web.Http;
...
[HttpPost]
[Route("ContactForm")]
public IHttpActionResult PostContactForm([FromBody] ContactForm contactForm)
    {
        var hostname = HttpContext.Current.Request.UserHostAddress;
        IPAddress ipAddress = IPAddress.Parse(hostname);
        IPHostEntry ipHostEntry = Dns.GetHostEntry(ipAddress);
        ...

与OP不同，这给了我客户端IP和客户端主机名，而不是服务器。也许他们从那时起就修复了这个错误？

如果您使用Asp自托管。Net 2.1使用OWIN Self主机NuGet包可以使用以下代码：

 private string getClientIp(HttpRequestMessage request = null)
    {
        if (request == null)
        {
            return null;
        }
        if (request.Properties.ContainsKey("MS_OwinContext"))
        {
            return ((OwinContext) request.Properties["MS_OwinContext"]).Request.RemoteIpAddress;
        }
        return null;
    }

最好将其转换为HttpContextBase，这样可以更容易地模拟和测试

public string GetUserIp(HttpRequestMessage request)
{
    if (request.Properties.ContainsKey("MS_HttpContext"))
    {
        var ctx = request.Properties["MS_HttpContext"] as HttpContextBase;
        if (ctx != null)
        {
            return ctx.Request.UserHostAddress;
        }
    }
    return null;
}

我的解决方案类似于user1587439的答案，但直接在控制器的实例上工作(而不是访问HttpContext.Current(

在"观察"窗口，我看到了这个。RequestContext。WebRequest包含"UserHostAddress"属性，但由于它依赖于WebHostHttpRequestContext类型("System.Web.Http"程序集内部(-我无法直接访问它，所以我使用反射直接访问它：

string hostAddress = ((System.Web.HttpRequestWrapper)this.RequestContext.GetType().Assembly.GetType("System.Web.Http.WebHost.WebHostHttpRequestContext").GetProperty("WebRequest").GetMethod.Invoke(this.RequestContext, null)).UserHostAddress;

我并不是说这是最好的解决方案。在将来升级框架的情况下(由于名称更改(，使用反射可能会导致问题，但对于我的需要，它是完美的

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