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一个有用的Windows服务小程序——用来完成Server端的Socket通信[转载]-beeone ...

原作者: [db:作者] 来自: [db:来源] 收藏 邀请
 今天被迫要做一个接收通信的模块，以前从来都没有做过关于通信方面的东西，就像没有做过有关GIS方面的程序一样是头一次开发此类程序。
      这个Socket通信说是自己的其实完全不是（如果哪位高人见到此程序是您本人开发的千万不要介意，本人也是在网上搜索出的，这个程序真的很不错，值得推广哦！在此谢谢发布此Socket通信程序的高人）。
      此程序的大部分源码没有任何改动，只是原来的Server端是用C/S程序写的，为了能使Socket通信的Server端更灵活，在此将其改成一个Windows服务，因此也需要改动了一些Server端的代码和工程，但是基础类和Client端都没有改变。
      对于我本人来说，Windows服务和Socket通信本人都不是很了解，只是经过了昨天简单的学习和研究才完成了此Windows服务Server端Socket通信程序，所以也说不出太多的门道，如果有清楚这方面知识的博友还希望能多多交流。好了，废话少说，开始正题了。
      现在开始我们来讲解，如何一步一步地完成Windows服务Server端Socket通信程序。
      我个人认为Windows服务只是包裹在Socket通信程序外的“一件外套”，所以核心还是我在网上找到的这个Socket程序，为此我们的第一步应该先开发出此Socket程序的类库。
1、打开Visual Studio.Net2003，单击菜单中的“文件”——>“新建”——>“项目”，在弹出的对话框左侧选择“Visual C#项目”，在右侧选择“类库”，下方的名称中输入“SocketLibrary”，位置自己随便选择一个路径。
2、删除自动创建的Class1.cs，新建如下的类名文件“Client.cs”、“Connection.cs”、“ConnectionCollection.cs”、“Message.cs”、“MessageCollection.cs”、“Server.cs”、“SocketBase.cs”和“SocketFactory.cs”。
3、各个类文件的代码如下：
(1)、Client.cs文件中的代码：
using System;
using System.Net;
using System.Net.Sockets;

namespace SocketLibrary
{

    public class Client:SocketBase
    {
        public const int CONNECTTIMEOUT = 10;
        public Client()
        {
            
        }
        public Connection StartClient(IPAddress ipaddress,int port) {
            TcpClient client = new TcpClient();
            client.SendTimeout = CONNECTTIMEOUT;
            client.ReceiveTimeout = CONNECTTIMEOUT;

            client.Connect(ipaddress,port);

            this._connections.Add(new Connection(client.GetStream()));
            this.StartListenAndSend();
            return new Connection(client.GetStream());
        }
        public void StopClient() {
            

            this.EndListenAndSend();     
        }
    }
}
(2)、Connection.cs文件中的代码：
using System;
using System.Net;
using System.Net.Sockets;

namespace SocketLibrary
{
    /**//// <summary>
    /// Connection 的摘要说明。
    /// </summary>
    public class Connection
    {
        public NetworkStream NetworkStream {
            get{return _networkStream;}
            set{_networkStream = value;}
        }
        private NetworkStream _networkStream;
        public string ConnectionName {
            get{return _connectionName;}
            set{_connectionName = value;}
        }
        private string _connectionName;
        public Connection(NetworkStream networkStream,string connectionName)
        {
            this._networkStream = networkStream;
            this._connectionName = connectionName;
        }
        public Connection(NetworkStream networkStream):this(networkStream,string.Empty) {
        }
    }
}
(3)、ConnectionCollection.cs文件中的代码：
using System;

namespace SocketLibrary {
    public class ConnectionCollection:System.Collections.CollectionBase {
        public ConnectionCollection() {
            
        }
        public void Add(Connection value) {
            List.Add(value); 
        }
        public Connection this[int index] {
            get {
                return List[index] as Connection;     
            }
            set{
                List[index] = value;
            }
        }
        public Connection this[string connectionName] {
            get {
                foreach(Connection connection in List) {
                    if(connection.ConnectionName == connectionName)
                        return connection;
                }
                return null;
            }
        }
    }
}
(4)、Message.cs文件中的代码：
using System;

namespace SocketLibrary
{
    public class Message
    {
        public enum CommandHeader:byte {
            SendMessage = 1     
        }
        public Connection SendToOrReceivedFrom;
        public int MessageLength;
        public CommandHeader Command; 
        public byte MainVersion;
        public byte SecondVersion;

        public string MessageBody;

        public bool Sent;

        public Message()
        {
            SendToOrReceivedFrom = null;
            Sent = false;
        }
        public Message(CommandHeader command,byte mainVersion,byte secondVersion,string messageBody):this() {
            this.Command = command;
            this.MainVersion = mainVersion;
            this.SecondVersion = secondVersion;
            this.MessageBody = messageBody;
        }
        public byte[] ToBytes() {
            this.MessageLength = 7 + SocketFactory.DefaultEncoding.GetByteCount(this.MessageBody);//计算消息总长度。消息头长度为7加上消息体的长度。
            byte[] buffer = new byte[this.MessageLength];
            //先将长度的4个字节写入到数组中。
            BitConverter.GetBytes(this.MessageLength).CopyTo(buffer,0);
            //将CommandHeader写入到数组中
            buffer[4] = (byte)this.Command;
            //将主版本号写入到数组中
            buffer[5] = (byte)this.MainVersion;
            //将次版本号写入到数组中
            buffer[6] = (byte)this.SecondVersion;

            //消息头已写完，现在写消息体。
            byte[] body = new byte[this.MessageLength - 7];
            SocketFactory.DefaultEncoding.GetBytes(this.MessageBody).CopyTo(buffer,7);
            return buffer;     
        }
        public static Message Parse(Connection connection) {
            Message message = new Message();
            //先读出前四个字节，即Message长度
            byte[] buffer = new byte[4];
            if(connection.NetworkStream.DataAvailable) {
                int count = connection.NetworkStream.Read(buffer,0,4);
                if(count == 4) {
                    message.MessageLength = BitConverter.ToInt32(buffer,0);     
                }
                else
                    throw new Exception("网络流长度不正确");
            }
            else
                throw new Exception("目前网络不可读");
            //读出消息的其它字节
            buffer = new byte[message.MessageLength - 4];
            if(connection.NetworkStream.DataAvailable) {
                int count = connection.NetworkStream.Read(buffer,0,buffer.Length);
                if(count == message.MessageLength -4) {
                    message.Command = (CommandHeader)buffer[0];
                    message.MainVersion = buffer[1];
                    message.SecondVersion = buffer[2];

                    //读出消息体
                    message.MessageBody = SocketFactory.DefaultEncoding.GetString(buffer,3,buffer.Length - 3);
                    message.SendToOrReceivedFrom = connection;

                    return message;
                }
                else
                    throw new Exception("网络流长度不正确");
            }
            else
                throw new Exception("目前网络不可读");
        }

    }
}
(5)、MessageCollection.cs文件中的代码：
using System;

namespace SocketLibrary
{
    public class MessageCollection:System.Collections.CollectionBase
    {
        public MessageCollection()
        {
            
        }
        public void Add(Message value) {
            List.Add(value); 
        }
        public Message this[int index] {
            get {
                return List[index] as Message;     
            }
            set{
                List[index] = value;
            }
        }
        public MessageCollection this[Connection connection] {
            get {
                MessageCollection collection = new MessageCollection();
                foreach(Message message in List) {
                    if(message.SendToOrReceivedFrom == connection)
                        collection.Add(message);
                }
                return collection;
            }
        }
    }
}
(7)、SocketBase.cs文件中的代码：
using System;
using System.Net;
using System.Net.Sockets;

namespace SocketLibrary
{
    public class Server:SocketBase
    {
        

        private TcpListener _listener;
        public Server()
        {
            this._connections = new ConnectionCollection();
        }
        protected System.Threading.Thread _listenConnection;

        public void StartServer(int port) {
            _listener = new TcpListener(IPAddress.Any, port);
            _listener.Start();

            _listenConnection = new System.Threading.Thread(new System.Threading.ThreadStart(Start));
            _listenConnection.Start();

            this.StartListenAndSend();
        }
        public void StopServer() {
            _listenConnection.Abort();
            this.EndListenAndSend();
            
        }
        private void Start() {
            try {
                while(true) {
                    if(_listener.Pending()) {
                        TcpClient client = _listener.AcceptTcpClient();
                        NetworkStream stream = client.GetStream();
                        Connection connection = new Connection(stream);
                        this._connections.Add(connection);
                        this.OnConnected(this,new ConnectionEventArgs(connection,new Exception("连接成功")));
                    }
                    System.Threading.Thread.Sleep(200);
                }    
            }
            catch {
                 }
        }
        
    }
}
(7)、SocketBase.cs文件中的代码：
using System;

namespace SocketLibrary
{
    /**//// <summary>
    /// SocketBase 的摘要说明。
    /// </summary>
    public class SocketBase
    {
        public class MessageEventArgs:EventArgs {
            public Message Message;
            public Connection Connecction;
            public MessageEventArgs(Message message,Connection connection) {
                this.Message = message;
                this.Connecction = connection;
            }
        }
        public delegate void MessageEventHandler(object sender,MessageEventArgs e);

        public class ConnectionEventArgs:EventArgs {
            public Connection Connection;
            public Exception Exception;
            public ConnectionEventArgs(Connection connection,Exception exception) {
                this.Connection = connection;
                this.Exception = exception;
            }
        }
        public delegate void ConnectionHandler(object sender,ConnectionEventArgs e);

        public ConnectionCollection Connections {
            get{return _connections;}
            set{_connections = value;}
        }
        protected ConnectionCollection _connections;

        public MessageCollection messageQueue {
            get{return _messageQueue;}
            set{_messageQueue = value;}
        }
        protected MessageCollection _messageQueue;

        public SocketBase()
        {
            this._connections = new ConnectionCollection();
            this._messageQueue = new MessageCollection();
        }
        protected void Send(Message message) {
            this.Send(message,message.SendToOrReceivedFrom);     
        }
        protected void Send(Message message,Connection connection) {
            byte[] buffer = message.ToBytes();
            lock(this) {
                connection.NetworkStream.Write(buffer,0,buffer.Length);
            }
        }

        protected System.Threading.Thread _listenningthread;
        protected System.Threading.Thread _sendthread;
        protected virtual void Sendding() {
            try {
                while(true) {
                    System.Threading.Thread.Sleep(200);
                    for(int i = 0 ; i < this.messageQueue.Count ; i++) {
                        if(this.messageQueue[i].SendToOrReceivedFrom != null) {
                            this.Send(this.messageQueue[i]);
                            this.OnMessageSent(this,new MessageEventArgs(this.messageQueue[i],this.messageQueue[i].SendToOrReceivedFrom));
                        }
                        else {//对每一个连接都发送此消息
                            for(int j = 0 ; j < this.Connections.Count ; j++) {
                                this.Send(this.messageQueue[i],this.Connections[j]);
                                this.OnMessageSent(this,new MessageEventArgs(this.messageQueue[i],this.Connections[j]));
                            }
                        }
                        this.messageQueue[i].Sent = true;
                    }
                    //清除所有已发送消息
                    for(int i = this.messageQueue.Count - 1 ; i > -1 ; i--) {
                        if(this.messageQueue[i].Sent)
                            this.messageQueue.RemoveAt(i);
                    }
                }
            }catch{
                 }
        }
        protected virtual void Listenning() {
            try {
                while(true) {
                    System.Threading.Thread.Sleep(200);
                    foreach(Connection connection in this._connections) {
                        if(connection.NetworkStream.CanRead && connection.NetworkStream.DataAvailable) {
                            try {
                                Message message = Message.Parse(connection); 
                                this.OnMessageReceived(this,new MessageEventArgs(message,connection));
                            }
                            catch(Exception ex) {
                                connection.NetworkStream.Close();
                                this.OnConnectionClose(this,new ConnectionEventArgs(connection,ex));
                            }
                        }
                    }
                }
            }
            catch {
            }
        }

        protected void StartListenAndSend() {
            _listenningthread = new System.Threading.Thread(new System.Threading.ThreadStart(Listenning));
            _listenningthread.Start();
            _sendthread = new System.Threading.Thread(new System.Threading.ThreadStart(Sendding));
            _sendthread.Start();
        }
        public void EndListenAndSend() {
            _listenningthread.Abort();
            _sendthread.Abort();
        }



        public event MessageEventHandler MessageReceived;
        public event MessageEventHandler MessageSent;
        public event ConnectionHandler ConnectionClose;
        public event ConnectionHandler Connected;

        public void OnMessageReceived(object sender,MessageEventArgs e) {
            if(MessageReceived != null)
                this.MessageReceived(sender,e);
        }
        public void OnMessageSent(object sender,MessageEventArgs e) {
            if(MessageSent != null)
                this.MessageSent(sender,e);
        }
        public void OnConnectionClose(object sender,ConnectionEventArgs e) {
            if(ConnectionClose != null)
                this.ConnectionClose(sender,e);
        }
        public void OnConnected(object sender,ConnectionEventArgs e) {
            if(Connected != null)
                this.Connected(sender,e);
        }
    }
}
(8)、SocketFactory.cs文件中的代码：
using System;
using System.Net;
using System.Net.Sockets;

namespace SocketLibrary {
    /**////

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