pop3高级程序开发.doc

6.6.2创建应用程序的过程1使用MFC AppWizard创建应用程序框架工程名是pop3，应用程序的类型是基于对话框的，对话框的标题是“接收电子邮件客户端程序”，需要Windows Sockets的支持，其它部分接受系统的默认设置就可以。应用程序包括两个类：应用程序类：CPop3App，基类是CWinApp，对应的文件是pop3.h和pop3.cpp。对话框类：CPop3Dlg，基类是CDialog，对应的文件是pop3Dlg.h和pop3Dlg.cpp。2为对话框添加控件在程序的主对话框界面中按照图6-13添加相应的可视控件对象，并按照表6-13修改控件的属性。表6-13 对话框中的控件属性控件类型控件IDCaption静态文本 static textIDC_STATIC服务器地址静态文本 static textIDC_STATIC用户名静态文本 static textIDC_STATIC密码编辑框 edit boxIDC_SERVER编辑框 edit boxIDC_USER编辑框 edit boxIDC_PASSCHECK BOXIDC_DEL是否删除邮件RichEditIDC_INFO命令按钮 buttonIDC_CONN连接命令按钮 buttonIDC_VIEW查看邮件命令按钮 buttonIDC_DISC断开命令按钮 buttonIDCANCAL退出CChooseDlgCComboBoxIDC_MSGLISTCViewDlg编辑框 edit boxIDC_MSGTEXT命令按钮 buttonIDC_SAVE存储3定义控件的成员变量按照表6-14，用类向导(Class Wizard)为对话框中的控件对象定义相应的成员变量。表6-14 控件对象的成员变量控件IDControl IDs变量名称Member Variable Name变量类别Category变量类型Variable TypeIDC_SERVERserverValueCStringIDC_USERuserValueCStringIDC_PASSpassValueCStringIDC_DELdelValueBOOLIDC_INFOinfoValueCStringctllnfoControlCRichEditCtrlCChooseDlgIDC_MSGLISTctlListControlCComboBoxCViewDlgIDC_MSGTEXTtextValueCString4添加成员变量的初始化代码在FtpDlg.cpp文件的OnInitDialog()函数中添加成员变量的初始化代码。对服务器名，登录用户名，登录口令的控件变量赋初值。BOOL CFtpDlg:OnInitDialog(). / 前面是MFC应用程序向导和类向导自动生成的代码/ TODO: Add extra initialization herem_strFtp=_T(); / 初始化服务器域名m_strName=_T(); / 初始化登录用户名m_strPwd=_T(); / 初始化登录口令UpdateData(FALSE); /更新界面return TRUE; / return TRUE unless you set the focus to a control5为对话框中的控件对象添加事件响应函数按照表6-15，用类向导(Class Wizard )为对话框中的控件对象添加事件响应函数。表6-15 对话框控件的事件响应函数控件类型对象标识 ObjectID消息 Message函数Member functions命令按钮IDC_CONNBN_CLICKEDOnConn命令按钮IDC_VIEWBN_CLICKEDOnView命令按钮IDC_DISCBN_CLICKEDOnDiscCChooseDlg命令按钮IDOKBN_CLICKEDOnOKCViewDlg命令按钮IDC_SAVEBN_CLICKEDOnSave6为CFtpDlg类添加其它的成员函数BOOL CFtpDlg: Download (CString strSName, CString strDName)；BOOL CFtpDlg: Upload (CString strSName, CString strDName)；分别用于文件的下载和上传。7手工添加包含语句在CFtpDlg类的FtpDlg.cpp文件中添加对于Afxinet.h的包含命令，来获得对于MFC WinInet类的支持。8添加事件函数和成员函数的代码9进行测试4创建从CAsyncSocket类继承的派生类（1）为了能够捕获并响应socket事件，应创建用户自己的套接字类，它应当从CAsyncSocket类派生，还能将套接字事件传递给对话框，以便执行用户自己的事件处理函数。选择菜单“插入/新建类”，进入“New Class”对话框，如图5-12所示。图5-12 添加自己的套接字类选择或输入以下信息：Class Type：选择MFC ClassClass Infoumation下的Name: 输入mySockClass Infoumation下的Base class：选择CAsyncSocket点击“OK”按钮，系统会自动生成CMySocket类对应的包含文件mySock.h和mySock.cpp文件，在VC界面的Class View中就可以看到这个类。（2）利用类向导ClassWizard为这个套接字类添加响应消息的事件处理成员函数。点菜单View/ClassWizard.，进入类向导对话框，选择Message Maps（消息映射）卡，确认Class name是mySock，从Messages（消息）栏中选择事件消息，然后点击Add Function按钮，就会看到在Member Function栏中添加了相应的事件处理函数。如图5-13所示，此程序中需要添加OnConnect，OnClose和OnReceive三个函数。这一步会在CMySocket类的mySock.h中自动生成这些函数的声明，在mySock.cpp中生成这些函数的框架，以及消息映射的相关代码。可参看后面的程序清单。图5-13 为套接字类添加响应消息的事件处理成员函数（3）为套接字类添加一般的成员函数和成员变量在VC+的界面中，在工作区窗口选择ClassView卡，用右键单击CMySocket类，会弹出快捷菜单，选择其中的Add Member Function 可以为该类添加成员函数；选择Add Member Variable可以为该类添加成员变量。如图5-14所示。图5-15和图5-16是添加操作的对话框。图5-14 为指定的类添加成员变量或成员函数对这个套接字类，添加一个私有的成员变量，是一个对话框类的指针。private:CPop3Dlg * m_pDlg;图5-15 为套接字类添加一般的成员变量再添加一个成员函数：void SetParent(CPop3Dlg * pDlg);图5-16 为套接字类添加一般的成员函数这一步同样会在mySock.h中生成变量或函数的声明，在mySock.cpp中生成函数的框架代码。如果熟悉的话，这一步的代码也可以直接手工添加。（4）手工添加其他代码在VC+的界面中，在工作区窗口选择FileView卡，双击要编辑的文件，在右面的窗口中就会展示该文件的代码，可以编辑添加。对于mySock.h，应在文件开头，添加对于此应用程序对话框类的声明。class CPop3Dlg;对于mySock.cpp，有四处添加： 应在文件开头，添加包含文件说明。这是因为此套接字类用到了对话框类的变量。#include “pop3Dlg.h” 在构造函数中，添加对于对话框指针成员变量的初始化代码：mySock：mySock() m_pDlg = NULL; 在析构函数中，添加对于对话框指针成员变量的初始化代码：mySock：mySock() m_pDlg = NULL; 为成员函数setParent和事件处理函数OnConnect，OnClose和OnReceive添加代码。详见后面的程序清单。/ pop3.h : main header file for the POP3 application#if !defined(AFX_POP3_H_INCLUDED_)#define AFX_POP3_H_INCLUDED_#if _MSC_VER 1000#pragma once#endif / _MSC_VER 1000#ifndef _AFXWIN_H_#error include stdafx.h before including this file for PCH#endif#include resource.h / main symbols/ CPop3App:/ See pop3.cpp for the implementation of this classclass CPop3App : public CWinApppublic:CPop3App();/ Overrides/ ClassWizard generated virtual function overrides/AFX_VIRTUAL(CPop3App)public:virtual BOOL InitInstance();/AFX_VIRTUAL/ Implementation/AFX_MSG(CPop3App)/ NOTE - the ClassWizard will add and remove member functions here./ DO NOT EDIT what you see in these blocks of generated code !/AFX_MSGDECLARE_MESSAGE_MAP();/AFX_INSERT_LOCATION/ Microsoft Visual C+ will insert additional declarations immediately before the previous line.#endif / !defined(AFX_POP3_H_INCLUDED_)/ pop3.cpp : Defines the class behaviors for the application.#include stdafx.h#include pop3.h#include pop3Dlg.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif/ CPop3AppBEGIN_MESSAGE_MAP(CPop3App, CWinApp)/AFX_MSG_MAP(CPop3App)/ NOTE - the ClassWizard will add and remove mapping macros here./ DO NOT EDIT what you see in these blocks of generated code!/AFX_MSGON_COMMAND(ID_HELP, CWinApp:OnHelp)END_MESSAGE_MAP()/ CPop3App constructionCPop3App:CPop3App()/ TODO: add construction code here,/ Place all significant initialization in InitInstance/ The one and only CPop3App objectCPop3App theApp;/ CPop3App initializationBOOL CPop3App:InitInstance()if (!AfxSocketInit()AfxMessageBox(IDP_SOCKETS_INIT_FAILED);return FALSE;AfxEnableControlContainer(); /MFC自动创建的AfxInitRichEdit(); /自己加的/ Standard initialization/ If you are not using these features and wish to reduce the size/ of your final executable, you should remove from the following/ the specific initialization routines you do not need.#ifdef _AFXDLLEnable3dControls(); / Call this when using MFC in a shared DLL#elseEnable3dControlsStatic(); / Call this when linking to MFC statically#endifCPop3Dlg dlg;m_pMainWnd = &dlg;int nResponse = dlg.DoModal();if (nResponse = IDOK)/ TODO: Place code here to handle when the dialog is/ dismissed with OKelse if (nResponse = IDCANCEL)/ TODO: Place code here to handle when the dialog is/ dismissed with Cancel/ Since the dialog has been closed, return FALSE so that we exit the/ application, rather than start the applications message pump.return FALSE;/ pop3Dlg.h : header file#if !defined(AFX_POP3DLG_H_INCLUDED_)#define AFX_POP3DLG_H _INCLUDED_#include pop31.h#include resource.h#if _MSC_VER 1000#pragma once#endif / _MSC_VER 1000/ CPop3Dlg dialogclass CPop3Dlg : public CDialog/ Construction public:CPop3 pop3;void Dispatch(LONG param);CPop3Dlg(CWnd* pParent = NULL);/ standard constructor/ Dialog Data/AFX_DATA(CPop3Dlg)enum IDD = IDD_POP3_DIALOG ;CRichEditCtrl ctlInfo;CString info;CString pass;CString server;CString user;BOOL del;/AFX_DATA/ ClassWizard generated virtual function overrides/AFX_VIRTUAL(CPop3Dlg)protected:virtual void DoDataExchange(CDataExchange* pDX); / DDX/DDV support/AFX_VIRTUAL/ Implementationprotected:HICON m_hIcon;/ Generated message map functions/AFX_MSG(CPop3Dlg)virtual BOOL OnInitDialog();afx_msg void OnPaint();afx_msg HCURSOR OnQueryDragIcon();afx_msg void OnConn();afx_msg void OnDisc();afx_msg void OnView();/AFX_MSGDECLARE_MESSAGE_MAP();/AFX_INSERT_LOCATION/ Microsoft Visual C+ will insert additional declarations immediately before the previous line.#endif / !defined(AFX_POP3DLG_H_INCLUDED_)/ pop3Dlg.cpp : implementation file#include stdafx.h#include pop3.h#include pop31.h#include Gniazdo.h#include ChooseDlg.h#include pop3Dlg.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif/ CPop3Dlg dialogCPop3Dlg:CPop3Dlg(CWnd* pParent /*=NULL*/): CDialog(CPop3Dlg:IDD, pParent)/AFX_DATA_INIT(CPop3Dlg)info = _T();pass = _T(wxpwxp);server = _T();user = _T(busywxp);del = FALSE;/AFX_DATA_INIT/ Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()-LoadIcon(IDR_MAINFRAME);void CPop3Dlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CPop3Dlg)DDX_Control(pDX, IDC_INFO, ctlInfo);DDX_Text(pDX, IDC_INFO, info);DDX_Text(pDX, IDC_PASS, pass);DDX_Text(pDX, IDC_SERVER, server);DDX_Text(pDX, IDC_USER, user);DDX_Check(pDX, IDC_DEL, del);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CPop3Dlg, CDialog)/AFX_MSG_MAP(CPop3Dlg)ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_CONN, OnConn)ON_BN_CLICKED(IDC_DISC, OnDisc)ON_BN_CLICKED(IDC_VIEW, OnView)/AFX_MSG_MAPEND_MESSAGE_MAP()/ CPop3Dlg message handlersBOOL CPop3Dlg:OnInitDialog()CDialog:OnInitDialog();/ Set the icon for this dialog. The framework does this automatically/ when the applications main window is not a dialogSetIcon(m_hIcon, TRUE); / Set big iconSetIcon(m_hIcon, FALSE); / Set small icon / TODO: Add extra initialization hereCHARFORMAT cf; /设置默认的字符格式cf.cbSize=sizeof(cf);cf.dwMask=CFM_COLOR | CFM_FACE;cf.dwEffects=0;cf.crTextColor=RGB(255,0,0);strcpy(cf.szFaceName,Verdana);CRichEditCtrl* re=(CRichEditCtrl*)GetDlgItem(IDC_INFO);re-SetDefaultCharFormat(cf);return TRUE; / return TRUE unless you set the focus to a control/ 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 CPop3Dlg:OnPaint() if (IsIconic()CPaintDC dc(this); / device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in client rectangleint 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 icondc.DrawIcon(x, y, m_hIcon);elseCDialog:OnPaint();/ The system calls this to obtain the cursor to display while the user drags/ the minimized window.HCURSOR CPop3Dlg:OnQueryDragIcon()return (HCURSOR) m_hIcon;/important function!/receives messages from CPop3 class!void CPop3Dlg:Dispatch(LONG param)CString s;switch(param)case S_CONNECT: /we are connectedinfo+=Connected to +server; /显示已连接到服务器info+=.rn;GetDlgItem(IDC_CONN)-EnableWindow(FALSE); /禁用连接按钮GetDlgItem(IDC_DISC)-EnableWindow(TRUE); /启用断开按钮GetDlgItem(IDC_VIEW)-EnableWindow(FALSE); /禁用查看邮件按钮break;case S_RECEIVE: /we are receiving some datapop3.GetLastMsg(s); /取来服务器发来的数据info+=s; /显示该数据break; case S_CLOSE: /we are closing connectioninfo+=pop3.GetError();info+=Connection closedrn; /显示连接关闭了GetDlgItem(IDC_CONN)-EnableWindow(TRUE); /启用连接按钮GetDlgItem(IDC_DISC)-EnableWindow(FALSE); /禁用断开按钮break;case S_GETNUMMSGS: /we can get number of messagess.Format(There are %d messagesrn,pop3.GetNumMsg();info+=s; /显示信件的数量break;case S_GETSIZEMSGS: /now size of messagess.Format(Size is: %drn,pop3.GetSizeMsg();info+=s; /显示信件的大小break;case S_ENDRETR: /we have received all of messagess.Format(Received %d messagesrn,pop3.GetRetrMsgNum();info+=s; /显示接收了所有信件的信息if(pop3.GetRetrMsgNum()0)GetDlgItem(IDC_VIEW)-EnableWindow(TRUE);/启用查看邮件按钮break;UpdateData(FALSE); /更新用户界面/当用户点击“连接”按钮时，执行此函数void CPop3Dlg:OnConn() pop3.Set(this); /设定pop3类的变量，使之指向本对话框，以便传递信息UpdateData(TRUE); /取来用户在对话框中输入的数据info=; /列表框清空pop3.SetProp(user,pass); /设定用户名和密码pop3.DelAfterRead(del); /设定邮件删除标志pop3.Create(); /创建pop3.Connect(LPCSTR)server,110); /连接服务器UpdateData(FALSE);void CPop3Dlg:OnDisc() pop3.Close();void CPop3Dlg:OnView() CChooseDlg dlg;dlg.DoModal();/ Gniazdo.h : header file/this is base class for CPop3/mostly, you dont use it directly (exceptions are Set, and OnConnect)/CPop3 will find this class useful#if !defined(AFX_GNIAZDO_H_INCLUDED_)#define AFX_GNIAZDO_H_INCLUDED_#if _MSC_VER = 1000#pragma once#endif / _MSC_VER = 1000#define DLG CPop3Dlg* /change it to your CDialog-based class/ CBase4Pop3 command target/ CBase4Pop3 socket messages:#define S_ACCEPT 0 #define S_CLOSE 1#define S_CONNECT 2#define S_RECEIVE 3#define S_SEND 4class CBase4Pop3 : public CAsyncSocketpublic:CBase4Pop3();virtual CBase4Pop3();/ Overridespublic:/设定接收消息窗体void Set(CDialog * pWnd);CDialog * m_pWnd; /指向父窗体/ Implementationprotected:/几个socket处理函数virtual void OnReceive(int);virtual void OnClose(int);virtual void OnSend(int);virtual void OnConnect(int);virtual void OnAccept(int);private:;/AFX_INSERT_LOCATION/ Microsoft Developer Studio will insert additional declarations immediately before the previous line.#endif / !defined(AFX_GNIAZDO_H_03185426_9BCB_420B_ADA4_4561790828A8_INCLUDED_)/ Gniazdo.cpp : implementation file#include stdafx.h#include pop3Dlg.h#include Gniazdo.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif/ CBase4Pop3CBase4Pop3:CBase4Pop3()CBase4Pop3:CBase4Pop3()/ Do not edit the following lines, which are needed by ClassWizard.#if 0BEGIN_MESSAGE_MAP(CBase4Pop3, CAsyncSocket)/AFX_MSG_MAP(CBase4Pop3)/AFX_MSG_MAPEND_MESSAGE_MAP()#endif / 0/ CBase4Pop3 member functionsvoid CBase4Pop3:Set(CDialog * pWnd) /set the pointerm_pWnd=pWnd;void CBase4Pop3:OnAccept(int err)/free of any error, dispatch messageif(err=0) (DLG)m_pWnd)-Dispatch(S_ACCEPT);void CBase4Pop3:OnConnect(int err)if(err=0) (DLG)m_pWnd)-Dispatch(S_CONNECT);void CBase4Pop3:OnSend(int err)void CBase4Pop3:OnClose(int err)if(err=0) (DLG)m_pWnd)-Dispatch(S_CLOSE);void CBase4Pop3:OnReceive(int err)if(err=0) (DLG)m_pWnd)-Dispatch(S_RECEIVE);/ Pop31.h: interface for the CPop3 class./mailto: zmoraabox43.pl/ feel free to e-mail me!/#if !defined(AFX_POP31_H_INCLUDED_)#define AFX_POP31_H_INCLUDED_#include Gniazdo.h#include #include #include using namespace std;#if _MSC_VER 1000#pragma once#endif / _MSC_VER 1000/enum type describing actual pop3 statetypedef enum FIRST=0,USER,PASS,STAT,LIST,RETR,ENDRETR,DELE,GOON STATE;#define S_GETNUMMSGS 5 /send when user can obtain number of messages#define S_GETSIZEMSGS 6 /as above, but size of messages#define S_ENDRETR 7 /send when done retrieving/simple struct that keeps message data, size, and retrieving sizetypedef struct CString text;int msgSize, retrSize; MESSAGEPROP;class CPop3 : public CBase4Pop3public:void WriteMsg(int i,CString name); /保存邮件到文件/获得基本的邮件信头字段: From, To, Date, Subject, BodyCString GetMsgStuff(int i); CString GetMsgBody(int i); /获得信件体void DelAfterRead(BOOL del=FALSE); /是否收完信后从服务器删除邮件CString GetMsgSubject(int i); /获得信件标题CString GetMsg(int i); /获得整封信的内容int GetRetrMsgNum(); /获得邮件的数量int GetSizeMsg(); /获得所有邮件的大小int GetNumMsg(); /获得服务器上邮件的数量CString GetError(); /获得错误void Close(); /退出服务器void SetProp(CString u, CString p); /设定用户名和密码void GetLastMsg(CString &); /获得从服务器传来的最后一条信息void OnReceive(int err); /套接字对象处理OnReceive事件的函数CPop3();virtual CPop3();private:void ReadLn(int index,CString src, CString &dst); /读入一行数据void ParseMsg(); / 分析服务器的应答，作不同的处理CString lastMsg, error;STATE state;CString user, pass;int numMsg, sizeMsg, retrMsg;vector msgs; /vector for message stuffBOOL delAfterRead;int delMsg;#endif / !defined(AFX_POP31_H_INCLUDED_)/ Pop31.cpp: implementation of the CPop3 c