/// <summary>
/// 释放指定TCP客户端信息的资源（不包括ThreadReceiveCommand）
/// </summary>
/// <param name="tcpClientInfo">TCP客户端信息</param>
protected void ReleaseTcpClientInfoWithoutCommand(TcpClientInfo tcpClientInfo)
{
if (tcpClientInfo.ThreadSendFile != null && tcpClientInfo.ThreadSendFile.ThreadState != ThreadState.Aborted)
{
tcpClientInfo.ThreadSendFile.Abort();
tcpClientInfo.ThreadSendFile = null;
}
if (tcpClientInfo.ThreadReceiveFile != null && tcpClientInfo.ThreadReceiveFile.ThreadState != ThreadState.Aborted)
{
tcpClientInfo.ThreadReceiveFile.Abort();
tcpClientInfo.ThreadReceiveFile = null;
}
if (tcpClientInfo.Reader != null)
{
tcpClientInfo.Reader.Close();
tcpClientInfo.Reader = null;
}
if (tcpClientInfo.Writer != null)
{
tcpClientInfo.Writer.Close();
tcpClientInfo.Writer = null;
}
if (tcpClientInfo.TcpClient != null && tcpClientInfo.TcpClient.Connected)
{
tcpClientInfo.TcpClient.Client.Close();
tcpClientInfo.TcpClient.Close();
tcpClientInfo.TcpClient = null;
}
if (tcpClientInfo.SendFileStream != null)
{
tcpClientInfo.SendFileStream.Close();
tcpClientInfo.SendFileStream = null;
}
}
/// <summary>
/// 接收文件
/// </summary>
/// <param name="fileDownLoadSaveDir">文件下载目录</param>
/// <param name="tcpClientInfo">客户端信息</param>
protected void ReceiveFile(string fileDownLoadSaveDir, TcpClientInfo tcpClientInfo)
{
if (tcpClientInfo == null)
{
throw new ArgumentNullException("tcpClientInfo");
}
int size = 0;
long len = 0;
string fileSavePath = Path.Combine(fileDownLoadSaveDir, tcpClientInfo.ReceiveFileInfo.FileName.Trim());
if (!Directory.Exists(fileDownLoadSaveDir))
{
Directory.CreateDirectory(fileDownLoadSaveDir);
}
FileStream fs = new FileStream(fileSavePath, FileMode.OpenOrCreate, FileAccess.Write)
{
Position = 0
};
byte[] buffer = new byte[tcpClientInfo.FileTransferBufferSize];
while (len < tcpClientInfo.ReceiveFileInfo.FileLength)
{
size = tcpClientInfo.Reader.Read(buffer, 0, buffer.Length);
fs.Write(buffer, 0, size);
len += size;
}
fs.Flush();
fs.Close();
}
/// <summary>
/// 接收文件
/// </summary>
/// <param name="clientName">客户端名称</param>
private void ReceiveFile(object clientName)
{
TcpClientInfo clientInfo = GetTcpClientInfo((string)clientName);
if (clientInfo == null)
{
return; //结束线程
}
bool bRet = false;
string strError = string.Empty;
try
{
base.ReceiveFile(FileDownLoadSaveDir, clientInfo);
bRet = true;
}
catch (Exception e)
{
bRet = false;
strError = e.Message;
}
if (bRet)
{
OnReceiveFileSuccess((string)clientName, Path.GetFullPath(Path.Combine(FileDownLoadSaveDir, clientInfo.ReceiveFileInfo.FileName.Trim())));
}
else
{
OnReceiveFileFail((string)clientName, strError);
}
}
/// <summary>
/// 发送文件
/// </summary>
/// <param name="clientName">客户端名称</param>
private void SendFile(object clientName)
{
TcpClientInfo clientInfo = GetTcpClientInfo((string)clientName);
if (clientInfo == null)
{
return; //结束线程
}
bool bRet = false;
string strError = string.Empty;
try
{
base.SendFile(clientInfo);
bRet = true;
}
catch (Exception e)
{
bRet = false;
strError = e.Message;
clientInfo.SendFileStream.Close();
}
if (bRet)
{
OnSendFileSuccess((string)clientName, clientInfo.SendFileStream.Name);
}
else
{
OnSendFileFail((string)clientName, strError);
}
}
/// <summary>
/// 发送消息
/// </summary>
/// <param name="message">消息</param>
/// <param name="tcpClientInfo">客户端信息</param>
public void SendMessage(string message, TcpClientInfo tcpClientInfo)
{
if (tcpClientInfo != null && tcpClientInfo.Writer != null)
{
tcpClientInfo.Writer.Write(message);
tcpClientInfo.Writer.Flush();
}
}
/// <summary>
/// 释放指定TCP客户端信息的资源
/// </summary>
/// <param name="tcpClientInfo">TCP客户端信息</param>
protected void ReleaseTcpClientInfo(TcpClientInfo tcpClientInfo)
{
ReleaseTcpClientInfoWithoutCommand(tcpClientInfo);
if (tcpClientInfo.ThreadReceiveCommand != null && tcpClientInfo.ThreadReceiveCommand.ThreadState != ThreadState.Aborted)
{
tcpClientInfo.ThreadReceiveCommand.Abort();
tcpClientInfo.ThreadReceiveCommand = null;
}
}
/// <summary>
/// 发送文件（暂时不支持多文件）
/// </summary>
/// <param name="filePath">文件路径，多文件使用分号隔开</param>
/// <param name="tcpClientInfo">TCP客户端信息</param>
public void SendFile(string filePath, TcpClientInfo tcpClientInfo)
{
if (string.IsNullOrWhiteSpace(filePath) || tcpClientInfo == null)
{
return;
}
tcpClientInfo.SendFileStream = new FileStream(filePath, FileMode.Open);
string fileName = Path.GetFileName(filePath);
string fileLength = tcpClientInfo.SendFileStream.Length.ToString();//单位为字节
SendMessage(MsgFileTransferReady + MsgFileName.Replace("##", fileName) + MsgFileLength.Replace("##", fileLength), tcpClientInfo);
}
/// <summary>
/// 释放出错TCP客户端
/// </summary>
/// <param name="tcpClientInfo">TCP客户端</param>
private void ReleaseErrorClient(TcpClientInfo tcpClientInfo)
{
if (tcpClientInfo != null)
{
string strClientName = tcpClientInfo.TcpClient.Client.RemoteEndPoint.ToString();
//释放资源
base.ReleaseTcpClientInfoWithoutCommand(tcpClientInfo);
if (TcpClientInfos.ContainsKey(strClientName))
{
TcpClientInfos.Remove(strClientName);
}
}
}
/// <summary>
/// 断开指定客户端的连接（释放资源）
/// </summary>
/// <param name="tcpClientInfo">TCP客户端信息</param>
public void DisconnectClient(TcpClientInfo tcpClientInfo)
{
if (tcpClientInfo != null)
{
string strClientName = tcpClientInfo.TcpClient.Client.RemoteEndPoint.ToString();
//释放资源
ReleaseTcpClientInfo(tcpClientInfo);
if (TcpClientInfos.ContainsKey(strClientName))
{
TcpClientInfos.Remove(strClientName);
}
}
}
/// <summary>
/// 发送文件
/// </summary>
/// <param name="tcpClientInfo">客户端信息</param>
protected void SendFile(TcpClientInfo tcpClientInfo)
{
if (tcpClientInfo == null)
{
throw new ArgumentNullException("tcpClientInfo");
}
int size = 0; //初始化读取的流量为0
long len = 0; //初始化已经读取的流量
byte[] buffer = new byte[tcpClientInfo.FileTransferBufferSize];
while (len < tcpClientInfo.SendFileStream.Length)
{
size = tcpClientInfo.SendFileStream.Read(buffer, 0, buffer.Length);
tcpClientInfo.Writer.Write(buffer, 0, size);
len += size;
}
tcpClientInfo.SendFileStream.Flush();
tcpClientInfo.SendFileStream.Close();
tcpClientInfo.Writer.Flush();
}
/// <summary>
/// 接收客户端连接
/// </summary>
private void ReceiveClient()
{
string strClientName = string.Empty;//客户端名称
while (true)
{
try
{
//限制客户端连接数量
if (MaxClientCount >= 0 && TcpClientInfos.Count >= MaxClientCount)
{
OnMaxClientCount(MaxClientCount);
return;
}
System.Net.Sockets.TcpClient tcpClient = _tcpListener.AcceptTcpClient(); //阻塞等待客户端连接
strClientName = tcpClient.Client.RemoteEndPoint.ToString();
NetworkStream networkStream = tcpClient.GetStream();
TcpClientInfo clientInfo = new TcpClientInfo();
clientInfo.TcpClient = tcpClient;
clientInfo.Writer = new BinaryWriter(networkStream);
clientInfo.Reader = new BinaryReader(networkStream);
clientInfo.ThreadReceiveCommand = new Thread(ReceiveCommand)
{
IsBackground = true
};
clientInfo.ThreadReceiveCommand.Start(strClientName); //也可以直接传递TcpClient对象
TcpClientInfos[strClientName] = clientInfo;
OnClientConnectSuccess(strClientName);
}
catch (Exception err)
{
if (!_serverStoped)
{
OnClientConnectFail(strClientName, err.Message);
}
}
}
}
/// <summary>
/// 接收指定客户端数据
/// </summary>
/// <param name="clientName">客户端名称</param>
private void ReceiveCommand(object clientName)
{
TcpClientInfo clientInfo = GetTcpClientInfo((string)clientName);
if (clientInfo == null)
{
return; //结束线程
}
while (true)
{
try
{
string receiveString = clientInfo.Reader.ReadString();//阻塞等待客户端发送数据
if (receiveString.StartsWith(MsgClientMessage))
{
//客户端发来文本信息
OnReceiveClientMessage((string)clientName, receiveString.Substring(MsgClientMessage.Length));
}
else if (receiveString.StartsWith(MsgFileTransferReady))
{
//准备文件传输（接收文件）
base.ParseFileTransferInfo(receiveString, out clientInfo.ReceiveFileInfo);
SendMessage(MsgFileTransferNow, clientInfo);
clientInfo.ThreadReceiveFile = new Thread(ReceiveFile)
{
IsBackground = true
};
clientInfo.ThreadReceiveFile.Start(clientName);
clientInfo.ThreadReceiveFile.Join();//阻塞等待线程结束
}
else if (receiveString.StartsWith(MsgFileTransferNow))
{
//开始文件传输（发送文件）
clientInfo.ThreadSendFile = new Thread(SendFile)
{
IsBackground = true
};
clientInfo.ThreadSendFile.Start(clientName);
clientInfo.ThreadSendFile.Join();//阻塞等待线程结束
}
else if (receiveString.StartsWith(MsgClientDisconnect))
{
//客户端主动断开连接
ReleaseErrorClient(clientInfo);//释放资源（当前客户端）
OnClientDisconnect((string)clientName);
break;
}
else
{
//接收到未知消息
OnReceiveUnknownMessage((string)clientName, receiveString);
}
}
catch (Exception error)
{
ReleaseErrorClient(clientInfo);//释放资源（当前客户端）
SocketException socketException = (SocketException)(error.InnerException);
if (socketException != null)
{
SocketError socketError = socketException.SocketErrorCode;
if ((int)socketError == 10054)
{
//客户端强制断开连接（如：强制关闭客户端）
OnClientForceDisconnect((string)clientName);
break;
}
}
OnClientConnectError((string)clientName, error.Message);
break;
}
}
}
