一个POP3协议的封装类

一个POP3协议的封装类
关键字:不详
在Internet上,电子邮件(E-MAIL)应用的非常广泛。通过它,用户可以很容易的
发送和接受信息。

通常,E-MAIL系统使用SMTP(发送邮件)和POP3(接收邮件)。有关此类协议更详
细的内容请参考RCF 821 (SMTP协议) and RFC 1225 ( POP3协议)。WINDOWS提供了
MAPI处理E-MAIL,但是它对直接与E-MAIL服务器通讯没有提供足够的功能。

这里是我自己编写的一个POP3协议的类,在这个类里我用CSocket 作为类的成员变
量,因此,我能在线程中使用。而且,POP3类的很多方法类似于POP3协议的命令。
下面是详细的代码:

/*-------------------------------------------------------------------- 
     Pop.h : main header file for the POP application 
-----------------------------------------------------------------------*/ 

#if !defined(AFX_POP_H__A44B38B6_697C_11D1_881E_00001C302581__INCLUDED_) 
#define AFX_POP_H__A44B38B6_697C_11D1_881E_00001C302581__INCLUDED_ 

#define CONNECTION_CHECK 0 
#define USER_CHECK  1 
#define PASSWORD_CHECK 2 
#define QUIT_CHECK  3 
#define DELETE_CHECK 4 
#define RSET_CHECK  5 
#define STAT_CHECK  6 
#define NOOP_CHECK  7 
#define LIST_CHECK  8 
#define RETR_CHECK  9 

///////////////////////////////////////////////////////////////////////////// 
class CPop 
{ 
public: 
 BOOL List(); 
 CWordArray m_SizeOfMsg; 
 CString GetErrorMessage();    // If there is any error this will return it method 
 CString GetPassword();           // Getting Password stored in class 
 void SetPassword(CString& Password);    // Setting Password in class 
 CString GetUser();                   // Getting user name stored in class 
 void SetUser(CString& User);  // Setting user name in class 
 CString GetHost();                    // Getting Host name (email server name) stored in class 
 void SetHost(CString& Host);    // Setting Host name (email server name) in class 
 BOOL Connect();                    // Connecting to email server 
 int GetTotalMailSize();                // it returns the Total Mail Size 
 int GetNumberOfMails();            // It return the number of mails 
 CString GetMsgContents();         
 BOOL Statistics();                    // issue the STAT command on email server 
 BOOL Retrieve(int MsgNumber);    // Getting any particular mail message 
 BOOL Reset();                        // issue the reset command on email server 
 int  GetMessageSize(int MsgNumber);    // Return a size of any particular mail 
 BOOL Noop();                     // issue the NOOP command on email server 
 BOOL Disconnect();            // issue the QUIT command on email server 
 BOOL Delete(int& MsgNumber); // Deleteing a particular message from email server 
 BOOL Connect(CString& Host, CString& User, CString& Password); 
 CPop(); 
 virtual ~CPop(); 

private: 
 CString m_ErrorMessage; 
 BOOL CheckResponse(int ResponseType); 
 CString m_Password; 
 CString m_User; 
 CString m_Host; 
 CString m_MsgContents; 
 int m_TotalSize; 
 int m_NumberMail; 
 CSocket m_PopServer; 
}; 
/#endif // !defined(AFX_POP_H__A44B38B6_697C_11D1_881E_00001C302581__INCLUDED_) 
  

/*----------------------------------------------------------------------------------------------- 
// Pop.cpp : Defines the class behaviors for the application. 
---------------------------------------------------------------------------------------------------*/ 

#include "stdafx.h" 
#include "Pop.h" 

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

//////////////////////////////////////////////////////////////////// 
// CPop Class 
////////////////////////////////////////////////////////////////////// 

////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 

CPop::CPop() 
{ 
 m_PopServer.Create(); 
} 
//{4EEC1C91-6BE1-11d1-8824-00001C302581} 

CPop::~CPop() 
{ 
 m_PopServer.Close(); 
} 

BOOL CPop::Connect(CString & Host, CString & User, CString & Password) 
{ 
 char buf [512]; 

 if (!m_PopServer.Connect(Host,110)) // 110 Pop3 Port 
 { 
  m_ErrorMessage = _T("Server cannot be connected"); 
  return FALSE; 
 } 
 else 
 { 
  if(CheckResponse(CONNECTION_CHECK)==FALSE) 
   return FALSE; 

  wsprintf (buf, "USER %s/r/n", (LPCSTR) User); 
  m_PopServer.Send(buf, strlen (buf)); 
  if(CheckResponse(USER_CHECK)==FALSE) 
   return FALSE; 

  wsprintf (buf, "PASS %s/r/n", (LPCSTR) Password); 
  m_PopServer.Send(buf, strlen (buf)); 
  if (CheckResponse(PASSWORD_CHECK)==FALSE) 
   return FALSE; 

  return TRUE; 
 } 

} 

BOOL CPop::Delete(int & MsgNumber) 
{ 
 char buf [512]; 

 wsprintf (buf, "DELE %d/r/n",MsgNumber ); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(DELETE_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 

BOOL CPop::Disconnect() 
{ 
 char buf [512]; 

 wsprintf (buf, "QUIT /r/n"); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(QUIT_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 

BOOL CPop::Noop() 
{ 
 char buf [512]; 

 wsprintf (buf, "NOOP  /r/n"); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(NOOP_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 

// Return the Msg Size for given msg number 
int CPop::GetMessageSize(int MsgNumber) 
{ 
 if(m_SizeOfMsg.GetSize() < MsgNumber+1) 
  return 0; 
 else 
  return m_SizeOfMsg[MsgNumber+1]; 
} 

BOOL CPop::Reset() 
{ 
 char buf [512]; 

 wsprintf (buf, "RSET /r/n"); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(RSET_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 

// MsgContents will hold the msg body 
BOOL CPop::Retrieve(int  MsgNumber) 
{ 
 char buf [512]; 

 wsprintf (buf, "RETR %d/r/n",MsgNumber ); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(RETR_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 

BOOL CPop::Statistics() 
{ 
 char buf [512]; 

 wsprintf (buf, "STAT /r/n"); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(STAT_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 

CString CPop::GetMsgContents() 
{ 
 return m_MsgContents; 
} 

int CPop::GetNumberOfMails() 
{ 
 return m_NumberMail; 
} 

int CPop::GetTotalMailSize() 
{ 
 return m_TotalSize; 
} 

BOOL CPop::Connect() 
{ 
 Connect(m_Host, m_User, m_Password); 
 return TRUE; 
} 

void CPop::SetHost(CString & Host) 
{ 
 m_Host = Host; 
} 

CString CPop::GetHost() 
{ 
 return m_Host; 
} 

void CPop::SetUser(CString & User) 
{ 
 m_User = User; 
} 

CString CPop::GetUser() 
{ 
 return m_User; 
} 

void CPop::SetPassword(CString & Password) 
{ 
 m_Password = Password; 
} 

CString CPop::GetPassword() 
{ 
 return m_Password; 
} 

BOOL CPop::CheckResponse(int ResponseType) 
{ 
 char buf [1000]; 

 for (int i=0;i<512;i++) 
  buf[i]='/0'; 

 m_PopServer.Receive(buf, sizeof(buf)); 

 switch (ResponseType) 
 { 
  case CONNECTION_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Bad Connection"); 
    return FALSE; 
   } 
   break; 

  case USER_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Bad User Name"); 
    return FALSE; 
   } 
   break; 
  case PASSWORD_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Bad Password Name"); 
    return FALSE; 
   } 
   break; 
  case QUIT_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during QUIT"); 
    return FALSE; 
   } 
   break; 
  case DELETE_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during DELE"); 
    return FALSE; 
   } 
   break; 
  case RSET_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during RSET"); 
    return FALSE; 
   } 
   break; 
  case STAT_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during STAT"); 
    return FALSE; 
   } 
   else 
   { 
    BOOL EmailNumber = TRUE; 
    for (char *p = buf; *p != '/0'; p++) 
    { 
     if (*p == '/t' || *p == ' ') 
     { 
      if(EmailNumber == TRUE) 
      { 
       m_NumberMail = atoi(p); 
       EmailNumber = FALSE; 
      } 
      else 
      { 
       m_TotalSize = atoi(p); 
       return TRUE; 
      } 
     } 
    } 

   } 
   break; 
  case NOOP_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during NOOP"); 
    return FALSE; 
   } 
   break; 

  case LIST_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during LIST"); 
    return FALSE; 
   } 
   else 
   { 
    m_PopServer.Receive(buf, sizeof(buf)); 

    for (char *p = buf; *p != '.'; p++) 
     if (*p == '/t' || *p == ' ') 
      m_SizeOfMsg.Add(atoi(p)); 
   } 
   break; 
  case RETR_CHECK: 
   if (strnicmp(buf,"-ERR", 4) == 0) 
   { 
    m_ErrorMessage = _T("Error occured during RETR"); 
    return FALSE; 
   } 
   else 
   { 
    char temp[9000]; 
    m_PopServer.Receive(temp, sizeof(temp)); 
    m_MsgContents = temp; 
   } 
   break; 
 } 
 return TRUE; 
} 

CString CPop::GetErrorMessage() 
{ 
 return m_ErrorMessage; 
} 

BOOL CPop::List() 
{ 
 char buf [512]; 

 wsprintf (buf, "LIST  /r/n"); 
 m_PopServer.Send(buf, strlen (buf)); 
 if (CheckResponse(LIST_CHECK)==FALSE) 
  return FALSE; 
 else 
  return TRUE; 
} 
 

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