serverdlg.cpp

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// ServerDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Server.h"
#include "ServerDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg dialog

CServerDlg::CServerDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CServerDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CServerDlg)
	m_selected = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_plistening=NULL;
}

void CServerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CServerDlg)
	DDX_Control(pDX, IDC_CLOSE, m_close);
	DDX_Control(pDX, IDC_START, m_start);
	DDX_Control(pDX, IDC_ONLINE, m_namelist);
	DDX_Control(pDX, IDC_CHATMSG, m_chatmsg);
	DDX_CBString(pDX, IDC_ONLINE, m_selected);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CServerDlg, CDialog)
	//{{AFX_MSG_MAP(CServerDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_START, OnStart)
	ON_BN_CLICKED(IDC_CLOSE, OnClose)
	ON_BN_CLICKED(IDC_QUIT, OnQuit)
	ON_CBN_SELCHANGE(IDC_ONLINE, OnSelchangeOnline)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg message handlers

BOOL CServerDlg::OnInitDialog()     //初始显示的对话框
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	m_close.EnableWindow(FALSE);   //没启动服务器前不允许关闭服务器
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CServerDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CServerDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CServerDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
//处理客户端的连接信息
void CServerDlg::accept()
{	
	//生成一个新的套节字与客户端通讯
	CChatSocket* psocket=new CChatSocket(this);
	if(m_plistening->Accept(*psocket))
	{
		
		psocket->Init();               //初始化文件对象
		psocket->seq=m_tempseq++;     //给客户端赋一个序号
		m_onlinelist.AddTail(psocket);//将该套节字保存到m_onlinelist链表中
	}
	else 
		delete psocket;
}
//接收数据
void CServerDlg::readall(CChatSocket* psocket)
{
	CMsg msg;
	do{
		readmsg(psocket,msg);
		if(m_plistening==NULL)
			return;
	}while(!psocket->m_pin->IsBufferEmpty());//缓冲区包含多个数据消息，需要循环直到所有的数据都被读出，并且缓冲区被清空
}

void CServerDlg::OnDestroy()//关闭对话框
{
	CDialog::OnDestroy();
	if(m_plistening)       //如果现在还有监听套节字，释放。
		delete m_plistening;
	CChatSocket* psocket;
	CMsg msg;
	msg.msgtype=MSG_STC_serverdown;//消息格式：S－>C 服务器端关闭
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;)//通知所有客户端，服务器已关闭
	{
		psocket=(CChatSocket*)m_onlinelist.GetNext(pos);
		sendmsg(psocket,msg);
	}
	// TODO: Add your message handler code here	
}
//接收数据
void CServerDlg::readmsg(CChatSocket* psocket,CMsg& msg)
{
	TRY
	{
		psocket->receivemsg(msg);
		msginterpreter(msg);   //对消息进行处理
	}
	CATCH(CFileException, e)
	{
		CString strTemp;
		if (strTemp.LoadString(IDS_SENDERROR))
			MessageBox(strTemp);
	}
	END_CATCH
}

void CServerDlg::msginterpreter(CMsg &msg)//对消息进行处理
{
	switch(msg.msgtype)
	{
	case MSG_CTC:
		SendToClient(msg);
		break;
	case MSG_CTS_newclient:     //客户端上线
		InitNewClient(msg);     //新上线的客户端接收在线的客户信息和序号
		UpdateOnlineClient(msg);//更新所有客户端
		break;
	case MSG_CTS_clientdown:    //客户端下线
		UpdateOnlineClient(msg);//更新所有客户端
		break;
	default:
		MessageBox("Undealed socket error!");
		break;
	}
}

void CServerDlg::OnStart() //启动服务器
{
	// TODO: Add your control notification handler code here
	m_plistening=new CListeningSocket(this);//创建监听套节字
	if(m_plistening->Create(5555))//调用Bind()函数将此Socket绑定到指定的地址上
		m_plistening->Listen();
	m_tempseq=0;
	m_start.EnableWindow(FALSE);//禁止再启动服务器
	m_close.EnableWindow(TRUE); //允许关闭服务器
}

void CServerDlg::OnClose()//关闭服务器
{
	// TODO: Add your control notification handler code here
	m_close.EnableWindow(FALSE);//不允许再关闭服务器
	delete m_plistening;        //释放监听套节字
	CChatSocket* psocket;
	CMsg msg;
	msg.msgtype=MSG_STC_serverdown;//消息格式：S－>C 服务器端关闭
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;)//通知所有客户端，服务器已关闭
	{
		psocket=(CChatSocket*)m_onlinelist.GetNext(pos);
		sendmsg(psocket,msg);
	}
	m_plistening=NULL;//防止关闭对话框时再释放监听套节字
	m_start.EnableWindow(TRUE);//允许再启动服务器
	int n=m_namelist.GetCount();//获得客户端数目
	while(n--)
		m_namelist.DeleteString(0);//清除所有客户端记录
	m_onlinelist.RemoveAll();      //释放所有的套节字
}

void CServerDlg::SendToClient(CMsg &msg)//将信息发送给客户端
{
	CChatSocket* psrc=NULL,*pdest=NULL,*psocket;
    if(msg.from==msg.to)
	{
		return;
	}
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;)
	{
		psocket=(CChatSocket*)m_onlinelist.GetNext(pos);
		if(!pdest&&psocket->seq==msg.to)//查找数据目的端套节字
			pdest=psocket;
		else if(!psrc&&psocket->seq==msg.from)//查找数据源端套节字
			psrc=psocket;
		else if(pdest&&psrc)
			break;
	}
	if(!pdest&&!psrc)
	{
		MessageBox("Message send error!");
		return;
	}
	sendmsg(pdest,msg);
	CString show=psrc->m_chatname+" 对 "+pdest->m_chatname+" 说:";
    m_chatmsg.AddString(show);
	m_chatmsg.AddString("   "+msg.chatcontent);
}

void CServerDlg::InitNewClient(const CMsg &msg)//新上线的客户端接收在线的客户信息和序号
{
	CChatSocket* psocket;
	bool found=false;
	CMsg smsg;
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;)
	{
		psocket=(CChatSocket*)m_onlinelist.GetNext(pos);
		if(psocket->seq==msg.from)
		{
			psocket->m_chatname=msg.chatcontent;//新上线客户端用户名
			m_namelist.AddString(msg.chatcontent);
			smsg.msgtype=MSG_STC_yourmsg;
			smsg.from=psocket->seq;//smsg代表要发送的信息;smsg.from,psocket->seq代表新上线客户端自己的序号
			sendmsg(psocket,smsg);
			found=true;
		}
	}
	if(found)
	{
		CChatSocket* p;
		smsg.msgtype=MSG_STC_alonline;//把在线的客户端信息发给新上线的客户端
		for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;)
		{
			p=(CChatSocket*)m_onlinelist.GetNext(pos);
			if(p->seq!=msg.from)
			{
				smsg.chatcontent=p->m_chatname;
				smsg.from=p->seq;
				sendmsg(psocket,smsg);
			}
		}
	}
}

void CServerDlg::UpdateOnlineClient(const CMsg& msg)//更新在线客户端名单
{
	CChatSocket* psocket;
	CMsg smsg;
	if(msg.msgtype==MSG_CTS_newclient)//判断消息格式
		smsg.msgtype=MSG_STC_newclient;
	else
		smsg.msgtype=MSG_STC_clientdown;
	smsg.from=msg.from;
	int i=0;
	POSITION prepos;
	for(POSITION pos=m_onlinelist.GetHeadPosition();pos!=NULL;i++)
	{
		prepos=pos;
		psocket=(CChatSocket*)m_onlinelist.GetNext(pos);
		if(psocket->seq==msg.from&&msg.msgtype==MSG_CTS_clientdown)//客户端下线
		{
			m_onlinelist.RemoveAt(prepos);//清除该客户端套接字
			m_namelist.DeleteString(i);//清除客户端序号
		}
		else if(psocket->seq!=msg.from)//更新所有客户端在线用户信息
		{
			smsg.to=psocket->seq;
		    smsg.chatcontent=msg.chatcontent;
			sendmsg(psocket,smsg);
		}
	}
}

void CServerDlg::sendmsg(CChatSocket *psocket, CMsg &msg)//消息发送
{
	TRY
	{
		psocket->sendmsg(msg);
	}
	CATCH(CFileException, e)
	{
		CString strTemp;
		if (strTemp.LoadString(IDS_SENDERROR))
			MessageBox(strTemp);
	}
	END_CATCH
}

void CServerDlg::OnQuit() //退出
{
	// TODO: Add your control notification handler code here
	OnOK();
}

void CServerDlg::OnSelchangeOnline() 
{
	// TODO: Add your control notification handler code here
	int nIndex;
	nIndex=m_namelist.GetCurSel();
	m_namelist.GetLBText(nIndex,m_selected);
	
}