c# - 在Docker中运行的ASP .Net Core 2.0中获取用户IP

Question

我尝试在Asp.Net Core 2.0 Web应用程序中获取用户IP。该应用程序在Docker容器中运行。
出于测试目的，我启动了一个新的Web api项目，并将此代码添加到“启动配置”方法的顶部。

app.Run(async (context) =>
{
    try
    {
        StringBuilder requestBuilder = new StringBuilder();

        var remoteIp = context.Connection.RemoteIpAddress;
        string remoteIpstring = remoteIp != null ? remoteIp.ToString() : "-";
        requestBuilder.Append(string.Format("remoteIp={0}\n", remoteIpstring));

        string remotePort = context.Connection.RemotePort.ToString();
        requestBuilder.Append(string.Format("remotePort={0}\n", remotePort));

        var serverIp = context.Connection.LocalIpAddress;
        string serverIpstring = serverIp != null ? serverIp.ToString() : "-";
        requestBuilder.Append(string.Format("serverIp={0}\n", serverIpstring));

        string serverPort = context.Connection.LocalPort.ToString();
        requestBuilder.Append(string.Format("serverPort={0}\n", serverPort));

        foreach (string key in context.Request.Headers.Keys)
        {
            string value = context.Request.Headers[key];
            requestBuilder.Append(string.Format("{0}={1}\n", key, value));
        }

        await context.Response.WriteAsync(requestBuilder.ToString());
    }
    catch (Exception e)
    {
        Console.WriteLine(e);
    }
});

我不知道为什么，但是当我检索RemoteIpAddress时，我得到了Docker网络网关的IP。当我检索LocalIpAddress时，我得到了Docker的网络IPAddress。

如何获得用户的真实IP？

Answer 1

来自 header ，例如X-Forwarded-For。但是为此，您将需要一种将其应用于请求的机制，例如代理。
然后，您只需索取标题并提取值

以下是nginx作为代理的示例配置:

     location / {
            proxy_pass http://localhost:5000;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection keep-alive;
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Real-IP  $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }