UdpServer.cs
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using OnlineStore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
namespace OnlineStore.Common
{
public class UdpServer
{
// public static readonly ILog LOGGER = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
private Thread m_serverThread;
private Socket udpServer;
public delegate void ReviceMsg(EndPoint address, string Msg);
/// <summary>
/// 接受到数据事件
/// </summary>
public event ReviceMsg ReviceMsgEvent;
private bool isRun = true;
private void logLocalIp()
{
string[] addresses = GetLocalAddresses();
string iplist = $"本机IP"+":[";
if (addresses.Length > 0)
{
for (int i = 0; i < addresses.Length; i++)
{
if (addresses.Length != 0)
{
iplist = iplist + " " + addresses[i];
}
}
}
LogUtil.info( iplist + "]");
}
/// <summary>
/// 开始服务
/// </summary>
public void Start(int m_serverPort)
{
try
{
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, m_serverPort);//定义一网络端点
udpServer = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//定义一个Socket
udpServer.Bind(ipep);//Socket与本地的一个终结点相关联
m_serverThread = new Thread(new ThreadStart(ReceiveData));
m_serverThread.Start();
logLocalIp();
isRun = true;
}
catch (Exception ex)
{
LogUtil.error("启动udpserver出错：" + ex.ToString());
}
}
/// <summary>
/// 停止服务
/// </summary>
public void Stop()
{
try
{
isRun = false;
m_serverThread.Interrupt(); // 线程终止
udpServer.Close(); // Socket Close
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
private StringBuilder sb = new StringBuilder(); //这个是用来保存：接收到了的，但是还没有结束的消息
private int receiveBufferSize = 1024;
private string terminateString = "\r";
private void ReceiveData()
{
try
{
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//定义要发送的计算机的地址
EndPoint Remote = (EndPoint)(sender);//
while (true)
{
byte[] buffer = new byte[receiveBufferSize];
int receivedSize = udpServer.ReceiveFrom(buffer, ref Remote);
if (receivedSize > 0)
{
string rawMsg = Encoding.ASCII.GetString(buffer, 0, receivedSize);
int rnFixLength = terminateString.Length; //这个是指消息结束符的长度，此处为\r\n
for (int i = 0; i < rawMsg.Length; ) //遍历接收到的整个buffer文本
{
if (i <= rawMsg.Length - rnFixLength)
{
if (rawMsg.Substring(i, rnFixLength) != terminateString)//非消息结束符，则加入sb
{
sb.Append(rawMsg[i]);
i++;
}
else
{
this.ReviceMsgEvent.Invoke(Remote, sb.ToString());//找到了消息结束符，触发消息接收完成事件
sb = new StringBuilder();
i += rnFixLength;
}
}
else
{
sb.Append(rawMsg[i]);
i++;
}
}
}
Thread.Sleep(500);
}
}
catch (Exception ex)
{
LogUtil.error("启动udpserver出错：" + ex.ToString());
}
}
/// <summary>
/// 获取本机地址列表
/// </summary>
public string[] GetLocalAddresses()
{
// 获取主机名
string strHostName = Dns.GetHostName();
// 根据主机名进行查找
IPHostEntry iphostentry = Dns.GetHostEntry(strHostName);
string[] retval = new string[iphostentry.AddressList.Length];
int i = 0;
foreach (IPAddress ipaddress in iphostentry.AddressList)
{
if (ipaddress.AddressFamily != AddressFamily.InterNetworkV6)
{
retval[i] = ipaddress.ToString();
i++;
}
}
return retval;
}
}
}