在本地测试不同的 IP 地址答案

【问题标题】：Testing different IP addresses locally在本地测试不同的 IP 地址
【发布时间】：2019-09-22 16:37:18
【问题描述】：

我正在实施一些代码，我使用访问者 IP 地址来确定他们的位置。对于 .net core 2，这是：

var ipAddress = Request.HttpContext.Connection.RemoteIpAddress;

当然，当我在本地测试时，我总是得到环回地址::1。有没有办法在本地测试时模拟外部 IP 地址？

【问题讨论】：

标签： c# asp.net-core

【解决方案1】：

您可以创建用于检索远程地址的服务。为其定义一个接口并创建2个实现并注入它们depending on the current environment

public interface IRemoteIpService
{
    IPAddress GetRemoteIpAddress();
}

public class RemoteIpService : IRemoteIpService
{
    private readonly IHttpContextAccessor _httpContextAccessor;

    public RemoteIpService(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }

    public IPAddress GetRemoteIpAddress()
    {
        return _httpContextAccessor.HttpContext.Connection.RemoteIpAddress;
    }
}

public class DummyRemoteIpService : IRemoteIpService
{
    public IPAddress GetRemoteIpAddress()
    {
        //add your implementation
        return IPAddress.Parse("120.1.1.99");
    }
}

启动

if (HostingEnvironment.IsProduction())
{
    services.AddScoped<IRemoteIpService, RemoteIpService>();
}
else
{
    services.AddScoped<IRemoteIpService, DummyRemoteIpService>();
}

用法

public class TestController : Controller
{
    //...
    private readonly IRemoteIpService _remoteIpService;

    public TestController(IRemoteIpService remoteIpService)
    {
        //...
        _remoteIpService = remoteIpService;
    }

    //..
    [HttpGet]
    public IActionResult Test()
    {
        var ip = _remoteIpService.GetRemoteIpAddress();
        return Json(ip.ToString());
    }
}

【讨论】：

【解决方案2】：

要获取本地主机的外部IP，您需要发送请求以检索该IP，并且您可以为ConnectionInfo 实现扩展，如

public static class ConnectionExtension
{
    public static IPAddress RemotePublicIpAddress(this ConnectionInfo connection)
    {
        if (!IPAddress.IsLoopback(connection.RemoteIpAddress))
        {
            return connection.RemoteIpAddress;
        }
        else
        {
            string externalip = new WebClient().DownloadString("http://icanhazip.com").Replace("\n","");
            return IPAddress.Parse(externalip);
        }
    }
}

并像使用一样

var ip = Request.HttpContext.Connection.RemotePublicIpAddress();

【讨论】：