Asp Net Web API 2.1 get client IP address

Question

Hello I need get client IP that request some method in web api, I have tried to use this code from here but it always returns server local IP, how to get in correct way ?

HttpContext.Current.Request.UserHostAddress;

from other questions:

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;
        }
    }

This extension method works well for me. (I'm not using OWIN or anything unusual.) — Nate Barbettini, Dec 10 '14 at 15:46
Possible duplicate of [Get the IP address of the remote host](http://stackoverflow.com/questions/9565889/get-the-ip-address-of-the-remote-host) — Michael Freidgeim, Sep 09 '16 at 22:56

score 139 · Accepted Answer · edited Jan 02 '19 at 09:02

Following link might help you. Here's code from the following link.

reference : getting-the-client-ip-via-asp-net-web-api

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;
                }
           }
     }
}

Another way of doing this is below.

reference: how-to-access-the-client-s-ip-address

For web hosted version

string clientAddress = HttpContext.Current.Request.UserHostAddress;

For self hosted

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

score 76 · Answer 2 · answered Aug 07 '14 at 18:16

76

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

answered Aug 07 '14 at 18:16

Ben Wilde

5,304
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Note that this only works if you are using Owin - https://msdn.microsoft.com/en-us/library/system.net.http.owinhttprequestmessageextensions.getowincontext(v=vs.118).aspx – Chandramouleswaran Ravichandra Mar 14 '16 at 16:38

score 20 · Answer 3 · answered Mar 20 '14 at 17:48

20

Try to get the Ip using

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

answered Mar 20 '14 at 17:48

user1587439

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@DenisBabarykin I think it should,..it returns the IP address in the server variable REMOTE_ADDR – user1587439 Apr 18 '16 at 15:56

score 10 · Answer 4 · answered Apr 10 '14 at 21:08

If you're self-hosting with Asp.Net 2.1 using the OWIN Self-host NuGet package you can use the following code:

 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;
    }

score 10 · Answer 5 · answered Mar 15 '17 at 15:45

I think this is the most clear solution, using an extension method:

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;
    }
}

So just use it like:

var ipAddress = request.GetClientIpAddress();

We use this in our projects.

Source/Reference: Retrieving the client’s IP address in ASP.NET Web API

score 10 · Answer 6 · edited Oct 07 '20 at 07:46

Replying to this 4 year old post, because this seems overcomplicated to me, at least if you're hosting on IIS.

Here's how I solved it:

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);
        ...

Unlike OP, this gives me the client IP and client hostname, not the server. Perhaps they've fixed the bug since then?

score 5 · Answer 7 · edited Sep 20 '16 at 07:59

5

It's better to cast it to HttpContextBase, this way you can mock and test it more easily

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;
}

edited Sep 20 '16 at 07:59

Patrick Hofman

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answered Jan 23 '15 at 13:02

Maxime Nanouche

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I googled around and others seem to concur with this (cast to HttpContextBase instead of HttpContextWrapper because HttpContextBase is easier to mock.) – Dave Clausen Jul 19 '16 at 18:03

score 2 · Answer 8 · answered Aug 07 '17 at 09:01

My solution is similar to user1587439's answer, but works directly on the controller's instance (instead of accessing HttpContext.Current).

In the 'Watch' window, I saw that this.RequestContext.WebRequest contains the 'UserHostAddress' property, but since it relies on the WebHostHttpRequestContext type (which is internal to the 'System.Web.Http' assembly) - I wasn't able to access it directly, so I used reflection to directly access it:

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

I'm not saying it's the best solution. using reflection may cause issues in the future in case of framework upgrade (due to name changes), but for my needs it's perfect

score 2 · Answer 9 · edited Sep 24 '19 at 21:44

2

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

This works on me.

System.Web.HttpContext.Current.Request.UserHostName; this one return me the same return I get from the UserHostAddress.

edited Sep 24 '19 at 21:44

Tasos K.

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answered Sep 24 '19 at 21:36

Robert Tan

31
4

Asp Net Web API 2.1 get client IP address

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