在Remoting Server上取得Remoting Client的IP地址

新客网 XKER.COM 2004-11-26 来源： 收藏本文

In short, the Remoting Server can make use of Sink and Sink Provider to retrieve the IP address of the incoming request. The IP address is available in the Transport Headers of the incoming message. After retrieving the IP address in the Sink, we save the IP address to the CallContext, so that it will be available later in the code execution path as well. The followings are some background information regarding the topics:


Sinks and Sink Chains
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconsinkssinkchains.asp

Using CallContext
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconusingcallcontext.asp


Code modified from the sample by Ingo Rammer, author of “Advanced .Net Remoting”:


using System;

using System.Collections;

using System.IO;

using System.Runtime.Remoting;

using System.Runtime.Remoting.Messaging ;

using System.Runtime.Remoting.Channels;

using System.Threading;

using System.Net;



namespace ClassLibRemotingIPSink

{



public class ClientIPServerSinkProvider: IServerChannelSinkProvider

{

private IServerChannelSinkProvider next = null;



public ClientIPServerSinkProvider(IDictionary properties, ICollection providerData)

{

}



public void GetChannelData (IChannelDataStore channelData)

{

}



public IServerChannelSink CreateSink (IChannelReceiver channel)

{

IServerChannelSink nextSink = null;

if (next != null)

{

nextSink = next.CreateSink(channel);

}

return new ClientIPServerSink(nextSink);

}



public IServerChannelSinkProvider Next

{

get { return next; }

set { next = value; }

}

}



public class ClientIPServerSink : BaseChannelObjectWithProperties, IServerChannelSink, IChannelSinkBase

{

private IServerChannelSink _next;



public ClientIPServerSink (IServerChannelSink next)

{

_next = next;

}



public void AsyncProcessResponse ( System.Runtime.Remoting.Channels.IServerResponseChannelSinkStack sinkStack , System.Object state , System.Runtime.Remoting.Messaging.IMessage msg , System.Runtime.Remoting.Channels.ITransportHeaders headers , System.IO.Stream stream )

{

}



public Stream GetResponseStream ( System.Runtime.Remoting.Channels.IServerResponseChannelSinkStack sinkStack , System.Object state , System.Runtime.Remoting.Messaging.IMessage msg , System.Runtime.Remoting.Channels.ITransportHeaders headers )

{

return null;

}



public System.Runtime.Remoting.Channels.ServerProcessing ProcessMessage(System.Runtime.Remoting.Channels.IServerChannelSinkStack sinkStack, System.Runtime.Remoting.Messaging.IMessage requestMsg, System.Runtime.Remoting.Channels.ITransportHeaders requestHeaders, System.IO.Stream requestStream, out System.Runtime.Remoting.Messaging.IMessage responseMsg, out System.Runtime.Remoting.Channels.ITransportHeaders responseHeaders, out System.IO.Stream responseStream)

{

if (_next != null)

{

IPAddress ip = requestHeaders[CommonTransportKeys.IPAddress] as IPAddress;

Console.WriteLine(ip.ToString());

CallContext.SetData("ClientIPAddress",ip);

ServerProcessing spres = _next.ProcessMessage (sinkStack,requestMsg, requestHeaders,requestStream,out responseMsg,out responseHeaders,out responseStream);

return spres;

}

else

{

responseMsg=null;

responseHeaders=null;

responseStream=null;

return new ServerProcessing();

}

}



public IServerChannelSink NextChannelSink

{

get {return _next;}

set {_next = value;}

}

}

}

• ·ASP+ACCESS数据库中文乱码问题解决
• ·编程实例 字母+数字验证码程序
• ·ASP连接数据库错误解决办法新法
• ·初学:ASP内建对象Response
• ·ASP网站Server object error的解决办法
• ·ASP技巧：让Len,Left,Right函数识别中文
• ·把网页中的电话号码生成图片的ASP程序
• ·ASP如何实现IE地址栏参数的判断
• ·细化解析：ASP连接11种数据库语法集锦
• ·ASP实现网页打开任何类型文件都保存
• ·ASP代码直接增加、删除ACCESS表和字段
• ·ASP：判断访问是否来自搜索引擎的函数
• ·ASP技巧：禁用页面缓存的五种方法
• ·学习ASP关于与变量子类型相关的函数
• ·ASP开发中的(VBScript)类基础学习
• ·ASP访问Excel文件