blocks|key|417611|text|这样做是可能的，但不是很容易发现-您需要使用传入请求中的属性包，并且您需要访问的属性取决于您是在IIS+(webhosted)下使用Web+API还是在自托管下使用Web+API。下面的代码展示了如何做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|417612|private+string+GetClientIp(HttpRequestMessage+request)
{
++++if+(request.Properties.ContainsKey("MS_HttpContext"))
++++{
++++++++return+((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
++++}

++++if+(request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
++++{
++++++++RemoteEndpointMessageProperty+prop;
++++++++prop+=+(RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
++++++++return+prop.Address;
++++}

++++return+null;
}|code-block|syntax|javascript|417613|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It's possible to do that, but not very discoverable - you need to use the property bag from the incoming request, and the property you need to access depends on whether you're using the Web API under IIS (webhosted) or self-hosted. The code below shows how this can be done.

<pre class="lang-cs prettyprint-override"><code>private string GetClientIp(HttpRequestMessage request)
{
 if (request.Properties.ContainsKey("MS_HttpContext"))
 {
 return ((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
 }

 if (request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
 {
 RemoteEndpointMessageProperty prop;
 prop = (RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
 return prop.Address;
 }

 return null;
}
</code></pre>

blocks|key|632753|text|carlosfigueira提供的解决方案可以工作，但类型安全的一行程序更好:添加一个using+System.Web，然后在您的操作方法中访问HttpContext.Current.Request.UserHostAddress。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|632754|entityMap^0|17|G|20|17|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

The solution provided by carlosfigueira works, but type-safe one-liners are better: Add a <code>using System.Web</code> then access <code>HttpContext.Current.Request.UserHostAddress</code> in your action method.

blocks|key|632786|text|如果您真的想要一个一行程序，并且不打算自托管Web+API：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|632787|((System.Web.HttpContextWrapper)Request.Properties["MS_HttpContext"]).Request.UserHostAddress;|code-block|syntax|javascript|632788|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you really want a one-liner and don't plan to self-host Web API:

<pre><code>((System.Web.HttpContextWrapper)Request.Properties["MS_HttpContext"]).Request.UserHostAddress;
</code></pre>

blocks|key|632933|text|上面的答案需要引用System.Web才能将属性强制转换为HttpContext或HttpContextWrapper。如果你不想要引用，你可以使用动态获取ip：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|632934|var+host+=+((dynamic)request.Properties["MS_HttpContext"]).Request.UserHostAddress;|code-block|syntax|javascript|632935|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Above answers require a reference to System.Web to be able to cast the property to HttpContext or HttpContextWrapper. If you don't want the reference, you are able to get the ip using a dynamic:

<pre><code>var host = ((dynamic)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
</code></pre>

blocks|key|633045|text|当服务器位于代理或负载均衡器之后时，标记的解决方案将返回代理的内部IP地址。在我们的例子中，我们的生产环境使用负载均衡器，而我们的开发和测试环境没有使用负载均衡器，所以我修改了标记的解决方案，以便在相同的代码中适应这两种情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|633046|public+string+GetSourceIp(HttpRequestMessage+httpRequestMessage)
++++{
++++++++string+result+=+string.Empty;

++++++++//+Detect+X-Forwarded-For+header
++++++++if+(httpRequestMessage.Headers.TryGetValues("X-Forwarded-For",+out+IEnumerable<string>+headerValues))
++++++++{
++++++++++++result+=+headerValues.FirstOrDefault();
++++++++}
++++++++//+Web-hosting
++++++++else+if+(httpRequestMessage.Properties.ContainsKey("MS_HttpContext"))
++++++++{
++++++++++++result+=+((HttpContextWrapper)httpRequestMessage.Properties["MS_HttpContext"]).Request.UserHostAddress;
++++++++}
++++++++//+Self-hosting
++++++++else+if+(httpRequestMessage.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
++++++++{
++++++++++++RemoteEndpointMessageProperty+prop;
++++++++++++prop+=+(RemoteEndpointMessageProperty)httpRequestMessage.Properties[RemoteEndpointMessageProperty.Name];
++++++++++++result+=+prop.Address;
++++++++}

++++++++return+result;
++++}|code-block|syntax|javascript|633047|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

When the server is behind a proxy or a load balancer the marked solution will return the internal IP address of the proxy. In our case, our production environment is using a load balancer and our development and test environments are not so I've amended the marked solution to fit both cases in the same code.
<pre><code>public string GetSourceIp(HttpRequestMessage httpRequestMessage)
 {
 string result = string.Empty;

 // Detect X-Forwarded-For header
 if (httpRequestMessage.Headers.TryGetValues(&quot;X-Forwarded-For&quot;, out IEnumerable&lt;string&gt; headerValues))
 {
 result = headerValues.FirstOrDefault();
 }
 // Web-hosting
 else if (httpRequestMessage.Properties.ContainsKey(&quot;MS_HttpContext&quot;))
 {
 result = ((HttpContextWrapper)httpRequestMessage.Properties[&quot;MS_HttpContext&quot;]).Request.UserHostAddress;
 }
 // Self-hosting
 else if (httpRequestMessage.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
 {
 RemoteEndpointMessageProperty prop;
 prop = (RemoteEndpointMessageProperty)httpRequestMessage.Properties[RemoteEndpointMessageProperty.Name];
 result = prop.Address;
 }

 return result;
 }
</code></pre>

In ASP.NET there is a <code>System.Web.HttpRequest</code> class, which contains <code>ServerVariables</code> property which can provide us the IP address from <code>REMOTE_ADDR</code> property value.

However, I could not find a similar way to get the IP address of the remote host from ASP.NET Web API.

How can I get the IP address of the remote host that is making the request?

Get the IP address of the remote host

负载均衡

服务器

在ASP.NET中有一个System.Web.HttpRequest类，它包含ServerVariables属性，它可以从REMOTE_ADDR属性值中为我们提供IP地址。但是，我找不到类似的方法从ASP.NET Web API获取远程主机的IP地址。如何获取发出请求的远程主机的IP地址？

问获取远程主机的IP地址
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