简单邮件传输协议SMTP封装类

简单邮件传输协议SMTP封装类

作者：Asif Rasheed 翻译：刘建强 在Internet上,Email是最流行的传输媒体。这篇文章包括两个协议：. POP 3 协议： POP3协议（邮政传输协议）就是指从Email服务器接收信件。我已经提交了一个封装POP3协议的类。该协议官方的描述你可查阅RFC1225。 SMTP协议： SMTP (简单邮件传输协议） 指发送邮件到它的目的地。 有关SMTP 协议的细节你可参考RCF 821 .我最新地贡献是封装了SMTP协议。我不能完全实现 SMTP协议但你可用它在许多应用场合发送邮件。该类有若干方法，我选方法名同SMTP命令， 所以你很容易理解。 在该类中，我再一次使用了CSocket作为类成员,所以我能在线程中使用它. 下面是该类的编码及注释： ////////////////////////////////////////////////////////////////////// // SMTP.h: interface for the CSMTP class. // ////////////////////////////////////////////////////////////////////// #if !defined(AFX_SMTP_H__617F7E82_7F4D_11D1_88A0_00001C302581__INCLUDED_) #define AFX_SMTP_H__617F7E82_7F4D_11D1_88A0_00001C302581__INCLUDED_ #if _MSC_VER >= 1000 #pragma once #endif // _MSC_VER >= 1000 #define CONNECTION_CHECK 0 #define HELLO_CHECK 1 #define MAIL_CHECK 2 #define RCPT_CHECK 3 #define DATA_START_CHECK 4 #define DATA_END_CHECK 5 #define QUIT_CHECK 6 #define DATA_CHECK 7 class CSMTP { public: BOOL Mail(); // CString GetErrorMessage(); BOOL Data(CString Subject, CString Body); CString GetTo(); BOOL SetTo(CString to); CString GetFrom(); void SetFrom(CString from); BOOL Mail(CString from); BOOL Disconnect(); CString GetHost(); void SetHost(CString Host); BOOL Connect(CString Host, CString Me); BOOL Connect(); CSMTP(); virtual ~CSMTP(); private: CString GetError(CString Response); CString m_ErrorMessage; BOOL CheckResponse(int Type); int m_NoOfTo; CStringArray m_To; CString m_From; CSocket m_SMTPServer; CString m_Host; }; #endif // !defined(AFX_SMTP_H__617F7E82_7F4D_11D1_88A0_00001C302581__INCLUDED_) ////////////////////////////////////////////////////////////////////////// // SMTP.cpp: implementation of the CSMTP class. // ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "MailSend.h" #include "SMTP.h" #ifdef _DEBUG #undef THIS_FILE static char THIS_FILE[]=__FILE__; #define new DEBUG_NEW #endif ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// CSMTP::CSMTP() { m_NoOfTo = 0; m_SMTPServer.Create(); } CSMTP::~CSMTP() { m_SMTPServer.Close(); } // Connect to the SMTP Server BOOL CSMTP::Connect() { return Connect(m_Host,m_From); } // Connect to the SMTP Server BOOL CSMTP::Connect(CString Host,CString From) { if (!m_SMTPServer.Connect(Host,25)) // 25 for SMTP Port { m_ErrorMessage = _T("Server cannot be connected"); return FALSE; } else { if(CheckResponse(CONNECTION_CHECK)==FALSE) return FALSE; char buf [512]; wsprintf (buf, "HELO %s\r\n", (LPCSTR) From); m_SMTPServer.Send(buf, strlen (buf)); if (CheckResponse(HELLO_CHECK)==FALSE) return FALSE; else return TRUE; return TRUE; } } // Setting the Host String void CSMTP::SetHost(CString Host) { m_Host = Host; } // Returing the Host String CString CSMTP::GetHost() { return m_Host; } // 发送"QUIT"命令到SMTP服务器： BOOL CSMTP::Disconnect() { char buf[256]; wsprintf (buf, "QUIT \r\n"); m_SMTPServer.Send(buf, strlen (buf)); if (CheckResponse(QUIT_CHECK)==FALSE) return FALSE; else return TRUE; } // 发送"MAIL" 命令到SMTP服务器： BOOL CSMTP::Mail(CString from) { char buf[256]; wsprintf (buf, "MAIL From:<%s>\r\n", (LPCSTR) from); m_SMTPServer.Send(buf, strlen (buf)); if (CheckResponse(MAIL_CHECK)==FALSE) return FALSE; else return TRUE; } // Setting the From string void CSMTP::SetFrom(CString from) { m_From = from; } // Returing the From string CString CSMTP::GetFrom() { return m_From; } // Setting the TO string BOOL CSMTP::SetTo(CString to) { char buf[256]; m_To.Add(to); // Saving vale of to wsprintf (buf, "RCPT TO:<%s>\r\n", (LPCSTR) to); m_SMTPServer.Send(buf, strlen (buf)); if (CheckResponse(RCPT_CHECK)==FALSE) return FALSE; else return TRUE; } // Returing the TO string CString CSMTP::GetTo() { if(m_To.GetSize()>=m_NoOfTo) { m_NoOfTo++; return m_To[m_NoOfTo-1]; } else return _T("No more To available"); } // 发送"DATA" 命令到 SMTP 服务器： BOOL CSMTP::Data(CString Subject, CString Body) { char buf[256]; wsprintf (buf, "DATA\r\n"); m_SMTPServer.Send(buf, strlen (buf)); if (CheckResponse(DATA_CHECK)==FALSE) return FALSE; else { wsprintf (buf, "SUBJECT:%s\r\n", (LPCSTR) Subject); m_SMTPServer.Send(buf, strlen (buf)); wsprintf (buf, "%s\r\n", (LPCSTR) Body); m_SMTPServer.Send(buf, strlen (buf)); wsprintf (buf, ".\r\n"); m_SMTPServer.Send(buf, strlen (buf)); return TRUE; } } //本方法检查服务器的响应： BOOL CSMTP::CheckResponse(int Type) { char buf [1000]; char temp[3]; for (int i=0;i < 512;i++) buf[i]='\0'; //从服务器接收数据 m_SMTPServer.Receive(buf, sizeof(buf)); strncpy(temp,buf,3); int temp2 = atoi(temp); switch (Type) { case CONNECTION_CHECK: if (temp2 != 220) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case HELLO_CHECK: if (temp2 != 250) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case MAIL_CHECK: if (temp2 != 250) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case RCPT_CHECK: if (temp2 != 250) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case DATA_START_CHECK: if (temp2 != 354) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case DATA_END_CHECK: if (temp2 != 250) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case QUIT_CHECK: if (temp2 != 221) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; case DATA_CHECK: if (temp2 != 354) { m_ErrorMessage = GetError((LPCTSTR)buf); return FALSE; } break; } return TRUE; } // 返回错误消息 CString CSMTP::GetErrorMessage() { return m_ErrorMessage; } // 按照错误号准备错误信息 CString CSMTP::GetError(CString Response) { if(Response.Find("211")) return _T("System status or system help reply"); if(Response.Find("214")) return _T("Help Message"); if(Response.Find("220")) return _T("Service is ready"); if(Response.Find("221")) return _T("Service closing transmission channel"); if(Response.Find("250")) return _T("Requested mail action okay, completed"); if(Response.Find("251")) return _T("user not local: will forward to forward path"); if(Response.Find("354")) return _T("Start mail input; end with . "); return _T("No Error Number is matched with ")+Response; } // Just overloading of the Mail method BOOL CSMTP::Mail() { return Mail(m_From); }　 这是该类一个小的实现：　 CSMTP m_smtp; m_smtp.Connect("khi.compol.com","[email protected]"); m_smtp.Mail("[email protected]"); m_smtp.SetTo("[email protected]"); m_smtp.Data("test message","This is a test message ... "); m_smtp.Disconnect();

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