通过MVC 5控制器在Azure中获取客户端IP [英] Get client IP in Azure through MVC 5 controller

问题描述

我找不到与此有关的问题或针对Azure的帖子，并且我不确定Azure环境与我的测试环境中有什么不同会导致此问题. 我已经尝试了几种方法来使其正常工作，但是我做错了.请注意，这不是 Webapi，所以据我所知，使用HttpRequestMessage也不起作用.

I can't find a question or post specific to Azure for this, and I'm not sure what's different in the environment in Azure versus my testing environments that would cause this. I've tried a few methods to get this to work but I'm not coming right. Please note this isn't Webapi, so using the HttpRequestMessage, as far as I know, is not going to work either.

这是我到目前为止尝试过的:

Here's what I've tried so far:

方法1:

string ipAddress = "";
IPHostEntry Host = default(IPHostEntry);
Host = Dns.GetHostEntry(System.Environment.MachineName);
ipAddress = Host.AddressList.SingleOrDefault(x => x.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork).MapToIPv4().ToString();

方法2:

string userIP = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(userIP))
{
    userIP = Request.ServerVariables["REMOTE_ADDR"];
}
return userIP;

谢谢.

推荐答案

读取此标头中传输的值:

Read the value transported in this header:

x-forwarded-for: "91.23.44.24:52623"

请注意，在IP地址后面有一个源端口号，因此请相应地进行解析.

Note there's a source port number trailing the IP address, so parse accordingly.

此外，正如 @NicoD 正确指出的那样，有问题的标头

Also, as @NicoD correctly points out, the header in question may contain an array of proxy servers the request traversed. For example:

x-forwarded-for: "91.23.44.24:52623, 91.23.44.155"

语法

X-Forwarded-For: <client>, <proxy1>, <proxy2>

<client>客户端IP地址

<proxy1>, <proxy2>如果请求通过多个代理，则会列出每个连续代理的IP地址.这意味着，最右边的IP地址是最新代理的IP地址，最左边的IP地址是发起客户端的IP地址.

<proxy1>, <proxy2> If a request goes through multiple proxies, the IP addresses of each successive proxy is listed. This means, the right-most IP address is the IP address of the most recent proxy and the left-most IP address is the IP address of the originating client.

您问的那个明显的端口号是什么?

What about that glaring port number you ask?

来自 https://tools.ietf.org/html/rfc7239 :

5.2.转发给

[...]此参数可以改为包含IP 地址(以及可能的端口号).

5.2. Forwarded For

[...] this parameter MAY instead contain an IP address (and, potentially, a port number).

所有客户端请求都在前端层终止，并通过应用程序请求路由"代理到您的Web工作者(托管MVC5应用程序).

All client requests are terminated in the frontend layer and proxied via Application Request Routing to your web worker (hosting the MVC5 application).

这篇关于通过MVC 5控制器在Azure中获取客户端IP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！