如何更改HttpWebRequest的原始IP [英] how to change originating IP in HttpWebRequest

问题描述

我运行已分配IP地址5的服务器上此应用程序。我使用的HttpWebRequest从网站获取的一些数据。但是，当我进行连接我可以指定其中5 IP地址之一，以从连接。是否HttpWebRequest的支持呢？如果没有我可以从它继承一个类来改变它的行为？我需要这里这么的想法。

我的code现在的问题是这样的：

  System.Net.WebRequest请求= System.Net.WebRequest.Create（链接）;
（（HttpWebRequest的）要求）.Referer =htt​​p://application.com;
使用（System.Net.WebResponse响应= request.GetResponse（））
{
    StreamReader的SR =新的StreamReader（response.GetResponseStream（））;
    返回sr.ReadToEnd（）;
}
 

解决方案

据<一个href=\"http://stackoverflow.com/questions/2829238/how-to-change-the-request-ip-in-httpwebrequest\">this,没有。您可能要下降到使用套接字，在那里我知道你可以选择本地IP。

编辑：实际上，它似乎是可能的。 HttpWebRequest的拥有的ServicePoint属性，这反过来又<一个href=\"http://msdn.microsoft.com/en-us/library/system.net.servicepoint.bindipendpointdelegate.aspx\">BindIPEndPointDelegate,这可能是你在找什么。

给我一分钟，我会掀起一个例子...

  HttpWebRequest的REQ =（HttpWebRequest的）WebRequest.Create（http://stackoverflow.com）;req.ServicePoint.BindIPEndPointDelegate =委托（
    的ServicePoint服务点，
    IPEndPoint remoteEndPoint，
    INT RetryCount重）{    如果（remoteEndPoint.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6）{
        返回新IPEndPoint（IPAddress.IPv6Any，0）;
    }其他{
        返回新IPEndPoint（IPAddress.Any，0）;
    }};Console.WriteLine（req.GetResponse（）ResponseUri）;
 

基本上，委托必须返回一个IPEndPoint。你可以选择任何你想要的，但如果它不能绑定到它，它会再打电话委托，达int.MAX_VALUE的时间。这就是为什么我包括code处理IPv6，因为IPAddress.Any是IPv4的。

如果你不关心IPv6，可以摆脱这一点。另外，我离开了ip地址的实际选择作为练习读者：）

I'm running this application on a server that has assigned 5 IPs. I use HttpWebRequest to fetch some data from a website. But when I make the connection I have be able to specify which one of the 5 IPs to make the connection from. Does HttpWebRequest support this? If it doesn't can I inherit a class from it to change it's behavior? I need so ideas here.

My code right now is something like:

System.Net.WebRequest request = System.Net.WebRequest.Create(link);
((HttpWebRequest)request).Referer = "http://application.com";
using (System.Net.WebResponse response = request.GetResponse())
{
    StreamReader sr = new StreamReader(response.GetResponseStream());
    return sr.ReadToEnd();
}

解决方案

According to this, no. You may have to drop down to using Sockets, where I know you can choose the local IP.

EDIT: actually, it seems that it may be possible. HttpWebRequest has a ServicePoint Property, which in turn has BindIPEndPointDelegate, which may be what you're looking for.

Give me a minute, I'm going to whip up an example...

HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://stackoverflow.com");

req.ServicePoint.BindIPEndPointDelegate = delegate(
    ServicePoint servicePoint,
    IPEndPoint remoteEndPoint,
    int retryCount) {

    if (remoteEndPoint.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6) {
        return new IPEndPoint(IPAddress.IPv6Any, 0);
    } else {
        return new IPEndPoint(IPAddress.Any, 0);
    }

};

Console.WriteLine(req.GetResponse().ResponseUri);

Basically, the delegate has to return an IPEndPoint. You can pick whatever you want, but if it can't bind to it, it'll call the delegate again, up to int.MAX_VALUE times. That's why I included code to handle IPv6, since IPAddress.Any is IPv4.

If you don't care about IPv6, you can get rid of that. Also, I leave the actual choosing of the IPAddress as an exercise to the reader :)

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