private void button2_Click(object sender, EventArgs e)//点击"退出登录"按键，执行下线功能
{
InfoWindow Confirm = new InfoWindow("确认退出当前账号？", true);
Confirm.StartPosition = FormStartPosition.CenterParent;
Confirm.ShowDialog();
if (Confirm.DialogResult == DialogResult.OK)//确认退出
{
Confirm.Close();
TcpClient client = new TcpClient();
try
{
client.Connect(BasicInfo.ServerIp, BasicInfo.ServerPort);
}
catch
{
InfoWindow Mes = new InfoWindow("服务器正忙\n 请稍等", false);
Mes.StartPosition = FormStartPosition.CenterParent;
Mes.Show();
return;
}
if (client.Connected)//连接成功发送下线请求
{
NetworkStream ClientToServer = client.GetStream();
string LoginInfo = "logout" + BasicInfo.UserName; //"logout"+学号
byte[] send = Encoding.Default.GetBytes(LoginInfo); //转化为字节流
ClientToServer.Write(send, 0, send.Length); //写入NetworkStream
byte[] msg = new byte[1024]; //接收
int length = ClientToServer.Read(msg, 0, msg.Length);
string response = Encoding.Default.GetString(msg, 0, length);
Console.WriteLine(response);
if (response == "loo")//服务器返回成功下线信息
{
ClientToServer.Close();
client.Close();
InfoWindow Mes = new InfoWindow("下线成功！", false);
Mes.StartPosition = FormStartPosition.CenterParent;
Mes.ShowDialog();
if (Mes.DialogResult == DialogResult.Cancel)
{
System.Environment.Exit(0);//关闭所有进程
}
}
else
{
//InfoWindow Mes = new InfoWindow("服务器状态异常\n 请稍等", false);//提示信息好像会重复，这里不要了
//Mes.StartPosition = FormStartPosition.CenterParent;
//Mes.Show();
return;
}
}
}
}
static void Logout()//下线功能，现已移植到ChatWindow中
{
InfoWindow Confirm = new InfoWindow("确认退出当前账号？", true);
Confirm.StartPosition = FormStartPosition.CenterParent;
Confirm.ShowDialog();
if (Confirm.DialogResult == DialogResult.OK)
{
Confirm.Close();
TcpClient client = new TcpClient();
try
{
client.Connect(BasicInfo.ServerIp, BasicInfo.ServerPort);
}
catch
{
InfoWindow Mes = new InfoWindow("服务器无响应\n您已强制退出程序", false);
Mes.StartPosition = FormStartPosition.CenterParent;
Mes.Show();
}
if (client.Connected)
{
NetworkStream ClientToServer = client.GetStream();
string LoginInfo = "logout" + BasicInfo.UserName; //下线格式："logout"+学号
byte[] send = Encoding.Default.GetBytes(LoginInfo); //将输入信息转化为byte字节流
ClientToServer.Write(send, 0, send.Length); //从networkstream中写入字节流
//接收
byte[] msg = new byte[1024];
int length = ClientToServer.Read(msg, 0, msg.Length);
string response = Encoding.Default.GetString(msg, 0, length);
Console.WriteLine(response);
if (response == "loo")
{
ClientToServer.Close();
client.Close();
InfoWindow Mes = new InfoWindow("您已强制退出程序\n 下线成功！", false);
Mes.StartPosition = FormStartPosition.CenterParent;
Mes.ShowDialog();
if (Mes.DialogResult == DialogResult.Cancel)
{
System.Environment.Exit(0);
} //关闭所有进程
}
else
{
InfoWindow Mes = new InfoWindow("未成功下线！\n您已强制退出程序", false);
Mes.StartPosition = FormStartPosition.CenterParent;
Mes.Show();
}
}
}
}
private void sendfile(object file)//发起P2P连接发送文件
{
string FileName = (string)file;
string FriendName = FileName.Substring(0, 10);
FileName = FileName.Substring(10);
string truefilename = FileName.Substring(FileName.LastIndexOf('\\') + 1);
FileStream ReadStream = new FileStream(FileName, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[1024];
int Packet = 1024;
int TotalFileNum = (int)(ReadStream.Length + 1023) / 1024;
if (TotalFileNum > 0)// 文件不为空
{
int pos = -1;
for (int i = 0; i < MyFriendList.Count; i++)
{
if (MyFriendList[i].Name == FriendName)
{
pos = i;
break;
}
}
QueryResult query = SearchIP(FriendName); //与发送消息基本相同
while (true) //等待端口空闲
{
pos = -1;
for (int i = 0; i < MyFriendList.Count; i++)
{
if (MyFriendList[i].Name == FriendName)
{
pos = i;
break;
}
}
if (pos > -1 || MyFriendList[pos].IsBusy == false)
{
break;
}
else
{
InfoLabel.Text = "端口正在占用，请稍等";
}
}
TcpClient NewClient = new TcpClient();
MyFriendList[pos].IsBusy = true; //正在占用端口
try //先尝试连接服务器
{
int Port = int.Parse(FriendName.Substring(6)) + 10000;
NewClient.Connect(query.IP, Port);
}
catch//未连接成功
{
Console.WriteLine("发起P2P连接失败");
return;
}
if (NewClient.Connected)
{
NetworkStream PeerToPeer = NewClient.GetStream();
byte[] ConfirmMessage = Encoding.Default.GetBytes(BasicInfo.UserName);
string response;
try
{
PeerToPeer.Write(ConfirmMessage, 0, ConfirmMessage.Length);//发送自己的名字，收到ACK时进行对话
byte[] ReturnMessage = new byte[20];
int length = PeerToPeer.Read(ReturnMessage, 0, ReturnMessage.Length);
response = Encoding.Default.GetString(ReturnMessage, 0, length);
Console.WriteLine(response);
}
catch
{
Console.WriteLine("发送P2P认证信息失败");
PeerToPeer.Close();
NewClient.Close();
return;
}
if (response == "ACK")//对方已经收到发出去的消息并加自己为好友
{
string temp = "[FileName]" + truefilename + "[Length]" + ReadStream.Length.ToString();
byte[] msg = Encoding.Default.GetBytes(temp);
//Console.WriteLine(msg.Length);
PeerToPeer.Write(msg, 0, msg.Length);
PeerToPeer.WriteTimeout = 20000;
int fileLength = 0;
try
{
while (fileLength < ReadStream.Length)
{
this.Invoke(new EventHandler(delegate
{
double percent = Convert.ToInt32(100.0 * fileLength / ReadStream.Length);
InfoLabel.Text = "文件传输中..." + percent + "%";//显示文件传输进度
}));
Packet = ReadStream.Read(buffer, 0, buffer.Length);
PeerToPeer.Write(buffer, 0, Packet);
fileLength += Packet;
}
Console.WriteLine(fileLength.ToString() + " " + ReadStream.Length.ToString());
this.Invoke(new EventHandler(delegate
{
InfoLabel.Text = "文件传输完成";
}));
ReadStream.Flush();//ReadStream.Flush();
PeerToPeer.Flush();
ReadStream.Close();
}
catch
{
InfoWindow Mes2 = new InfoWindow("文件传输失败", false);
Console.WriteLine("文件传输失败");
Mes2.StartPosition = FormStartPosition.CenterParent;
Mes2.Show();
return;
}
this.Invoke(new EventHandler(delegate
{
temp = "[文件][" + truefilename + "]";
UpdateChatPanel(BasicInfo.CurrentFriend, temp, DialogueType.MyText);//更新对话框显示
}));
}
PeerToPeer.Close();
NewClient.Close();
}
MyFriendList[pos].IsBusy = false;//释放端口
}
else
{
InfoWindow Mes2 = new InfoWindow("传输文件为空或过大", false);
Mes2.StartPosition = FormStartPosition.CenterParent;
Mes2.ShowDialog();
return;
}
}
private void ProcessFile(string FriendName, string receivedWords)//处理接收到的文件
{
NetworkStream PeerToPeer = client.GetStream();
int pos = -1;
for (int i = 0; i < MyFriendList.Count; i++)
{
if (MyFriendList[i].Name == FriendName)
{
pos = i;
break;
}
}
if (pos > -1)
{
bool IsError = false;
string message = receivedWords;
int posTemp = message.IndexOf("[Length]");
string FileName = message.Substring("[FileName]".Length, posTemp - "[FileName]".Length);//提取文件名
Console.WriteLine("接收文件" + FileName);
int FileLength = int.Parse(message.Substring(posTemp + "[Length]".Length));
string path = ".\\" + BasicInfo.UserName;//存在当前目录下该用户名的文件夹下
if (!Directory.Exists(path))
{
DirectoryInfo directoryInfo = new DirectoryInfo(path);
directoryInfo.Create();
}
string FilePath = path + "\\" + FileName;
FileStream WriteStream;//把接收的文件写到文件里
try
{
WriteStream = new FileStream(FilePath, FileMode.Create, FileAccess.Write);
}
catch
{
Console.WriteLine("写入文件失败");
InfoWindow Mes = new InfoWindow("文件写入失败\n文件被占用", false)
{
StartPosition = FormStartPosition.CenterParent
};
Mes.Show();
return;
}
byte[] buffer = new byte[2048];
int ReceiveBytes = 0;
PeerToPeer.ReadTimeout = 20000;
Console.WriteLine("正在接收文件");
int ReceiveLength = 0;
while (ReceiveLength < FileLength && !IsError)
{
try
{
ReceiveBytes = PeerToPeer.Read(buffer, 0, buffer.Length);
ReceiveLength += ReceiveBytes;
WriteStream.Write(buffer, 0, ReceiveBytes);//将字节写入文件
}
catch
{
IsError = true;//似乎提示框会报错，但是一般不会被触发
InfoWindow Mes = new InfoWindow("文件接收失败\n请稍后重试", false);
Mes.StartPosition = FormStartPosition.CenterParent;
Mes.Show();
return;
}
}
PeerToPeer.Flush();
PeerToPeer.Close();
if (!IsError)
{
WriteStream.Flush();
WriteStream.Close();
this.Invoke(new EventHandler(delegate
{
string temp = "[文件][" + FileName + "]";//显示在聊天框里
Friend TempFriend = UpdateChatPanel(FriendName, temp, DialogueType.PeerText);
Refresh(TempFriend);
if (Friend.PeopleCount == 1)
{
BasicInfo.CurrentFriend = FriendName;
}
}));
}
}
else
{
UpdateChatPanel(FriendName, string.Empty);//添加好友对话后再处理文件
ProcessFile(FriendName, receivedWords);
}
}