使用ARR从Web API读取客户端IP的Azure应用程序服务

我有一个ASP.Net Web API应用程序，托管在Azure的应用程序服务中，使用其自动缩放/ARR进行缩放。要读取客户端的IP，我需要查看

X-FORWARDED-FOR

，还是可以像没有负载平衡器一样读取，如下所示：

---

似乎找不到关于它如何工作的文档。

我可以给你我的测试结果

我创建了一个web应用程序，并手动将其设置为2个实例

我的代码：

public string GetIP()
{
    string HTTP_X_FORWARDED_FOR = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
    string REMOTE_ADDR = Request.ServerVariables["REMOTE_ADDR"];
    string UserHostAddress = Request.UserHostAddress;
    string WEBSITE_INSTANCE_ID = Environment.GetEnvironmentVariable("WEBSITE_INSTANCE_ID");
    return Newtonsoft.Json.JsonConvert.SerializeObject(new { HTTP_X_FORWARDED_FOR = HTTP_X_FORWARDED_FOR, REMOTE_ADDR = REMOTE_ADDR, UserHostAddress = UserHostAddress, WEBSITE_INSTANCE_ID = WEBSITE_INSTANCE_ID });
}

结果:

// First request from 13.70.19.163
{"HTTP_X_FORWARDED_FOR":"13.70.19.163:50331","REMOTE_ADDR":"13.70.19.163","UserHostAddress":"13.70.19.163","WEBSITE_INSTANCE_ID":"2b4ef85523c8628779b336b1ae7771fb0c5e289014ef47912d911dceb47ba032"}

// Second request from 65.52.178.194
{"HTTP_X_FORWARDED_FOR":"65.52.178.194:31190","REMOTE_ADDR":"65.52.178.194","UserHostAddress":"65.52.178.194","WEBSITE_INSTANCE_ID":"2b4ef85523c8628779b336b1ae7771fb0c5e289014ef47912d911dceb47ba032"}

// Another request from 223.67.26.144. This request is redirected to a different instance
{"HTTP_X_FORWARDED_FOR":"223.67.26.144:2732","REMOTE_ADDR":"223.67.26.144","UserHostAddress":"223.67.26.144","WEBSITE_INSTANCE_ID":"76deb6ae830639a9e41a93b4cc30ee9961483023510e33e97582dc1e2ac11a99"}

结论:

Request.ServerVariables[“HTTP\u X\u FORWARDED\u FOR”]

，

REMOTE\u ADDR

和

UserHostAddress

都可以获得正确的客户端IP

也许你可以试试这个。