从 SignalR 连接获取客户端 IP

Question

我知道以前有人问过这个问题。但在那之后的大约 8 年里，SignalR 发生了很大变化。

那么有人知道如何从 SignalR 集线器获取客户端的 IP 吗？

我正在使用 SignalR 在不同服务器上的两个 .net 核心应用程序之间进行通信，因此没有 HTTP 请求或为网站提供服务或类似的东西。

Answer 1

在您的中心内，您可以阅读 IHttpConnectionFeature 功能，例如：

using Microsoft.AspNetCore.Http.Features;
...
var feature = Context.Features.Get<IHttpConnectionFeature>();

它将返回具有以下属性的IHttpConnectionFeature 实例：

public interface IHttpConnectionFeature
{
    //
    // Summary:
    //     The unique identifier for the connection the request was received on. This is
    //     primarily for diagnostic purposes.
    string ConnectionId { get; set; }
    //
    // Summary:
    //     The IPAddress of the client making the request. Note this may be for a proxy
    //     rather than the end user.
    IPAddress? RemoteIpAddress { get; set; }
    //
    // Summary:
    //     The local IPAddress on which the request was received.
    IPAddress? LocalIpAddress { get; set; }
    //
    // Summary:
    //     The remote port of the client making the request.
    int RemotePort { get; set; }
    //
    // Summary:
    //     The local port on which the request was received.
    int LocalPort { get; set; }
}

代码示例：

public override Task OnConnectedAsync()
{
     var feature = Context.Features.Get<IHttpConnectionFeature>();
     _logger.LogInformation("Client connected with IP {RemoteIpAddress}", feature.RemoteIpAddress);
     return base.OnConnectedAsync();
}