通过特定的网络适配器发送HttpWebRequest

Question

我有两个连接到我的计算机的无线网络适配器,每个都连接到不同的网络.我想构建一种我的浏览器将连接到的代理服务器,它将从不同的适配器发送每个HTTP请求,因此网页上的加载时间会更短.你们知道我如何决定从哪个网络适配器发送HttpWebRequest？

谢谢 :)

UPDATE

我用过这段代码:

public static IPEndPoint BindIPEndPointCallback(ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount)
{
    List<IPEndPoint> ipep = new List<IPEndPoint>();
    foreach (var i in System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces())
    {
        foreach (var ua in i.GetIPProperties().UnicastAddresses)
            ipep.Add(new IPEndPoint(ua.Address, 0));
    }
    return new IPEndPoint(ipep[1].Address, ipep[1].Port);
}

private void button1_Click(object sender, EventArgs e)
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://whatismyip.com");
    request.ServicePoint.BindIPEndPointDelegate = new BindIPEndPoint(BindIPEndPointCallback);
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    StreamReader sr = new StreamReader(response.GetResponseStream());
    string x = sr.ReadToEnd();
}

但即使改变IPEndPoint我发送的IP我从WhatIsMyIp得到的仍然是相同的..任何帮助？

Answer 1

BindIPEndPointDelegate可能就是你在这里所追求的.它允许您强制将特定的本地IP作为发送HttpWebRequest的终点.

Answer 2

这个例子对我有用：

using System;
using System.Net;

class Program
{
    public static void Main ()
    {
        foreach (var ip in Dns.GetHostAddresses (Dns.GetHostName ())) 
        {
            Console.WriteLine ("Request from: " + ip);
            var request = (HttpWebRequest)HttpWebRequest.Create ("http://ns1.vianett.no/");
            request.ServicePoint.BindIPEndPointDelegate = delegate {
                return new IPEndPoint (ip, 0);
            };
            var response = (HttpWebResponse)request.GetResponse ();
            Console.WriteLine ("Actual IP: " + response.GetResponseHeader ("X-YourIP"));
            response.Close ();
        }
    }
}