我是否可以将指定的IP地址用的WebRequest .NET框架？ [英] Can I send webrequest from specified ip address with .NET Framework?

问题描述

我有多个IP地址的服务器。现在，我需要多个服务器以http协议进行通信。每个服务器只接受来自我的服务器的指定IP地址的请求。但是，在.NET中使用的WebRequest（或HttpWebRequest的）时，请求对象会自动选择一个IP地址。我找不到反正绑定一个地址的请求。

反正有这样做？或者我要实现一个WebRequest类自己？

解决方案

您需要使用 ServicePoint.BindIPEndPointDelegate 回调。

的 http://blogs.msdn.com/b/malarch/archive/2005/09/13/466664.aspx

在与HttpWebRequest的尝试相关的插座连接到远端的委托被调用。

 公共静态IPEndPoint BindIPEndPointCallback（的ServicePoint服务点，IPEndPoint remoteEndPoint，INT RetryCount重）
 {
 Console.WriteLine（BindIPEndpoint称为）; 
返回新IPEndPoint（IPAddress.Any，5000）; 
 
} 
 
公共静态无效的主要（）
 {
 
 HttpWebRequest的要求=（HttpWebRequest的）WebRequest.Create（HTTP：/ /要播）; 
 
 request.ServicePoint.BindIPEndPointDelegate =新BindIPEndPoint（BindIPEndPointCallback）; 
 
 HttpWebResponse响应=（HttpWebResponse）request.GetResponse（）; 
 
} 
  

I have a server with multi ip addresses. Now I need to communicate with several servers with http protocol. Each server only accept the request from a specified ip address of my server. But when using WebRequest(or HttpWebRequest) in .NET , the request object will choose a ip address automatically. I can't find anyway to bind the request with a address.

Is there anyway to do so ? Or I have to implement a webrequest class myself ?

解决方案

You need to use the ServicePoint.BindIPEndPointDelegate callback.

http://blogs.msdn.com/b/malarch/archive/2005/09/13/466664.aspx

The delegate is called before the socket associated with the httpwebrequest attempts to connect to the remote end.

public static IPEndPoint BindIPEndPointCallback(ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount)
{
    Console.WriteLine("BindIPEndpoint called");
      return new IPEndPoint(IPAddress.Any,5000);

}

public static void Main()
{

    HttpWebRequest request = (HttpWebRequest) WebRequest.Create("http://MyServer");

    request.ServicePoint.BindIPEndPointDelegate = new BindIPEndPoint(BindIPEndPointCallback);

    HttpWebResponse response = (HttpWebResponse)request.GetResponse();

}

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