开源一个监听指定IP,端口,并捕获通过此端口消息的类
using System;
using System.Text;
using System.Net.Sockets;
using System.Net;
namespace myClass
{
class clsListenPort
{
#region 使用说明
/*
用途:监听某IP,指定端口,捕获通过此端口的消息。
举例:
private delegate void ListenPostModel(string strData);//监听端口
myClass.clsListenPort myListenPort = new myClass.clsListenPort("LocalHost",8008);
myListenPort.GetMessage += new myClass.clsListenPort.GetMessageEventHandler(m_GetMessage);
myListenPort.GetMessageError += new myClass.clsListenPort.GetMessageErrorEventHandler(m_GetMessageError);
myListenPort.m_StartDoListen();//开始监听
//捕获到消息事件
private void m_GetMessage(myClass.clsListenPort sender, string data)
{
ListenPostModel dh = new ListenPostModel(m_ProcessMsg); //invokes为方法名
this.Invoke(dh, new object[] { data });// step3 调用invoke
}
private void m_ProcessMsg(string strMessage)
{
lst网络通信.Items.Add(strMessage);//显示通信消息
}
//Error消息事件
private void m_GetMessageError(myClass.clsListenPort sender, string data)
{
ListenPostModel dh = new ListenPostModel(m_ProcessMsgError); //invokes为方法名
this.Invoke(dh, new object[] { data });// step3 调用invoke
}
private void m_ProcessMsgError(string strMessage)
{
lst网络通信1.Items.Add(strMessage);//显示通信消息
}
//关闭监听，停止线程
if (myListenPort != null)
{
myListenPort.m_Close();
}
*/
#endregion
#region 私有变量
private bool bolIsListen = true;
private string strIPAddress;//IP地址
private int intPost;//端口
#endregion
#region 委托,事件
//捕获到消息
public delegate void GetMessageEventHandler(clsListenPort sender, string Data);
private GetMessageEventHandler GetMessageEvent;
public event GetMessageEventHandler GetMessage
{
add
{
GetMessageEvent = (GetMessageEventHandler)System.Delegate.Combine(GetMessageEvent, value);
}
remove
{
GetMessageEvent = (GetMessageEventHandler)System.Delegate.Remove(GetMessageEvent, value);
}
}
//异常
public delegate void GetMessageErrorEventHandler(clsListenPort sender, string Data);
private GetMessageErrorEventHandler GetMessageErrorEvent;
public event GetMessageErrorEventHandler GetMessageError
{
add
{
GetMessageErrorEvent = (GetMessageErrorEventHandler)System.Delegate.Combine(GetMessageErrorEvent, value);
}
remove
{
GetMessageErrorEvent = (GetMessageErrorEventHandler)System.Delegate.Remove(GetMessageErrorEvent, value);
}
}
#endregion
public clsListenPort(string IPAddress, int Post)
{
strIPAddress = IPAddress;
intPost = Post;
}
/// <summary>
/// 开始后台线程，开始侦听网络/端口
/// </summary>
public void m_StartDoListen()
{
System.Threading.Thread listenerThread = new System.Threading.Thread(new System.Threading.ThreadStart(m_DoListen));
listenerThread.Start();
}
/// <summary>
/// 开始监听
/// </summary>
public void m_DoListen()
{
try
{
Socket ssock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress hostIp = Dns.GetHostEntry(strIPAddress).AddressList[0];
IPEndPoint ep = new IPEndPoint(hostIp, intPost);
ssock.Bind(ep); //绑定
ssock.Listen(32); //开始侦听
while (bolIsListen)
{
Socket sock = ssock.Accept(); //等待客户端请求
string file="";
try
{
file = getRequest(sock);
if (file == "ShutdownListener")//停止侦听,释放端口
{
bolIsListen = false;
ssock.Close();//关闭连接
break;//退出 循环
}
if (GetMessageEvent != null)//执行事件
GetMessageEvent(this, file);
}
catch (Exception ex)
{
if (GetMessageErrorEvent != null)//执行事件
GetMessageErrorEvent(this, ex.Message);
}
finally
{
sock.Shutdown(SocketShutdown.Both);//关闭连接
sock.Close();
}
}
}
catch (Exception ex)
{
if (GetMessageErrorEvent != null)//执行事件
GetMessageErrorEvent(this, ex.Message);
}
}
/// <summary>
/// //停止侦听,释放端口,释放资源
/// </summary>
public void m_Close()
{
try
{
System.Windows.Forms.WebBrowser myWeb = new System.Windows.Forms.WebBrowser();
string strPath = "http://" + strIPAddress + ":" + intPost.ToString() + "/ShutdownListener";
myWeb.Navigate(strPath);//http://localhost:8008/ShutdownListener");
}
catch (Exception ex)
{
if (GetMessageErrorEvent != null)//执行事件
GetMessageErrorEvent(this, ex.Message);
}
}
/// <summary>
/// 读取请求信息,返回客户端请求的文件名
/// </summary>
/// <returns></returns>
private string getRequest(Socket sock)
{
string s = null;
byte[] buff = new byte[1024];
int recCount = 0;
try
{
//从socket读取请求信息
recCount = sock.Receive(buff, buff.Length, SocketFlags.None);
s = ASCIIEncoding.ASCII.GetString(buff, 0, recCount);
if (s.IndexOf("GET") > -1)
{
s = s.Substring(5);
int fend = s.IndexOf(" ");
s = s.Substring(0, fend); //取得请求文件的路径及文件名
}
return ProcessString(s);
}
catch (Exception ex)
{
if (GetMessageErrorEvent != null)//执行事件
GetMessageErrorEvent(this, ex.Message);
}
return "";
}
/// <summary>
/// 把客户端请求文件中的字符替换掉
/// </summary>
/// <param name="input">要处理的字符串</param>
/// <returns></returns>
private string ProcessString(string input)
{
StringBuilder result = new StringBuilder();
for (int i = 0; i < input.Length; i++)
{
if (input[i] == '/')
{
result.Append('\\');
}
else
{
result.Append(input[i]);
}
}
return result.ToString();
}
}
}
