C++实现发送邮件和附件功能

2025-05-27 0 52

本文实例为大家分享了C++实现发送邮件附件的具体代码,供大家参考,具体内容如下

头文件

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/*************************

*发送邮件模块头文件

*可以发送文本和附件(支持多个附件一起发送)

**************************/

#pragma once

struct sMailInfo //邮件信息

{

char* m_pcUserName;//用户登录邮箱的名称

char* m_pcUserPassWord;//用户登录邮箱的密码

char* m_pcSenderName;//用户发送时显示的名称

char* m_pcSender;//发送者的邮箱地址

char* m_pcReceiver;//接收者的邮箱地址

char* m_pcTitle;//邮箱标题

char* m_pcBody;//邮件文本正文

char* m_pcIPAddr;//服务器的IP

char* m_pcIPName;//服务器的名称(IP与名称二选一,优先取名称)

sMailInfo(){memset(this,0,sizeof(sMailInfo));}

};

class CSendMail

{

public:

CSendMail(void);

~CSendMail(void);

public:

bool SendMail(sMailInfo &smailInfo);//发送邮件,需要在发送的时候初始化邮件信息

void AddFilePath(char * pcFilePath);//添加附件的决定路径到附件列表中

void DeleteFilePath(char* pcFilePath);//删除附件路径,如果有的话

void DeleteAllPath(void);//删除全部附件的路径

protected:

void GetFileName(char* fileName,char* filePath);//从附件的路径中获取文件名称

void Char2Base64(char* pBuff64,char* pSrcBuff,int iLen);//把char类型转换成Base64类型

bool CReateSocket(SOCKET &sock);//建立socket连接

bool Logon(SOCKET &sock);//登录邮箱,主要进行发邮件前的准备工作

int GetFileData(char* FilePath);//由文件路径获取附件内容

bool SendHead(SOCKET &sock);//发送邮件头

bool SendTextBody(SOCKET &sock);//发送邮件文本正文

bool SendFileBody(SOCKET &sock);//发送邮件附件

bool SendEnd(SOCKET &sock);//发送邮件结尾

protected:

CList<char*,char*> m_pcFilePathList;//记录附件路径

char m_cSendBuff[4096];//发送缓冲区

char m_cReceiveBuff[1024];

char* m_pcFileBuff;//指向附件内容

sMailInfo m_sMailInfo;

};

模块实现文件

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/****************************

* 发送邮件模块

*可以发送文本和附件(支持多个附件一起发送)

*Date:2011-12-01

******************************/

#include "StdAfx.h"

#include "SendMail.h"

#include "winsock2.h"

#pragma comment(lib,"WSOCK32")

CSendMail::CSendMail(void)

{

m_pcFileBuff=NULL;

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

memset(m_cReceiveBuff,0,sizeof(m_cReceiveBuff));

}

CSendMail::~CSendMail(void)

{

DeleteAllPath();

}

void CSendMail::Char2Base64(char* pBuff64,char* pSrcBuff,int iLen)

{

//1 1 1 1 1 1 1 1

// 分配给pBuff64 ↑ 分配给pBuff64+1

// point所在的位置

static char Base64Encode[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";//base64所映射的字符表

int point;//每一个源字符拆分的位置,可取2,4,6;初始为2

point=2;

int i;

int iIndex;//base64字符的索引

char n=0;//上一个源字符的残留值

for(i=0;i<iLen;i++)

{

if(point==2)

{

iIndex=((*pSrcBuff)>>point)&0x3f;//取得pSrcBuff的高point位

}

else if (point==4)

{

iIndex=((*pSrcBuff)>>point)&0xf;//取得pSrcBuff的高point位

}

else if(point==6)

{

iIndex=((*pSrcBuff)>>point)&0x3;//取得pSrcBuff的高point位

}

iIndex+=n;//与pSrcBuff-1的低point结合组成Base64的索引

*pBuff64++=Base64Encode[iIndex];//由索引表得到pBuff64

n=((*pSrcBuff)<<(6-point));//计算源字符中的残留值

n=n&0x3f;//确保n的最高两位为0

point+=2;//源字符的拆分位置上升2

if(point==8)//如果拆分位置为8说明pSrcBuff有6位残留,可以组成一个完整的Base64字符,所以直接再组合一次

{

iIndex=(*pSrcBuff)&0x3f;//提取低6位,这就是索引了

*pBuff64++=Base64Encode[iIndex];//

n=0;//残留值为0

point=2;//拆分位置设为2

}

pSrcBuff++;

}

if(n!=0)

{

*pBuff64++=Base64Encode[n];

}

if(iLen%3==2)//如果源字符串长度不是3的倍数要用'='补全

{

*pBuff64='=';

}

else if(iLen%3==1)

{

*pBuff64++='=';

*pBuff64='=';

}

}

void CSendMail::AddFilePath(char * pcFilePath)//添加附件路径

{

if(pcFilePath==NULL)

{

return;

}

int i;

char* temp;

for(i=0;i<m_pcFilePathList.GetCount();i++)

{

temp=m_pcFilePathList.GetAt(m_pcFilePathList.FindIndex(i));

if(strcmp(pcFilePath,temp)==0)//如果已经存在就不用再添加了

{

return;

}

}

m_pcFilePathList.AddTail(pcFilePath);

}

void CSendMail::DeleteFilePath(char* pcFilePath)//删除附件路径

{

int i;

char* temp;

for(i=0;i<m_pcFilePathList.GetCount();i++)

{

temp=m_pcFilePathList.GetAt(m_pcFilePathList.FindIndex(i));

if(strcmp(temp,pcFilePath)==0)//找到并删除它,如果没找到就算了

{

m_pcFilePathList.RemoveAt(m_pcFilePathList.FindIndex(i));

delete[] temp;

return;

}

}

}

void CSendMail::DeleteAllPath(void)

{

m_pcFilePathList.RemoveAll();

}

int CSendMail::GetFileData(char* FilePath)

{

m_pcFileBuff=NULL;

if(FilePath==NULL)

{

return 0;

}

CFile f;

int len;

USES_CONVERSION;

if(!f.Open(A2W(FilePath),CFile::modeRead|CFile::modeNoTruncate|CFile::typeBinary))

{

return 0;

}

len=(int)f.GetLength();

m_pcFileBuff=new char[len+1];

memset(m_pcFileBuff,0,len+1);

f.Read(m_pcFileBuff,len);

f.Close();

return len;

}

void CSendMail::GetFileName(char* fileName,char* filePath)

{

if(filePath==NULL || fileName==NULL)

{

return;

}

int i;

for(i=0;i<(int)strlen(filePath);i++)

{

if(filePath[strlen(filePath)-1-i]=='\\\\')

{

memcpy(fileName,&filePath[strlen(filePath)-i],i);

return;

}

}

}

bool CSendMail::CReateSocket(SOCKET &sock)

{

WORD wVersionRequested;

WSADATA wsaData;

int err;

wVersionRequested = MAKEWORD( 2, 2 );

err = WSAStartup( wVersionRequested, &wsaData );

if ( err != 0 )

{

return false;

}

if ( LOBYTE( wsaData.wVersion ) != 2 ||

HIBYTE( wsaData.wVersion ) != 2 )

{

WSACleanup( );

return false;

}

sock = socket(AF_INET,SOCK_STREAM,IPPROTO_IP);

if (sock == INVALID_SOCKET)

{

return false;

}

sockaddr_in servaddr;

memset(&servaddr,0,sizeof(sockaddr_in));

servaddr.sin_family = AF_INET;

servaddr.sin_port = htons(25);//发邮件一般都是25端口

if(m_sMailInfo.m_pcIPName=="")

{

servaddr.sin_addr.s_addr = inet_addr(m_sMailInfo.m_pcIPAddr);//直接使用IP地址

}

else

{

struct hostent *hp=gethostbyname(m_sMailInfo.m_pcIPName);//使用名称

servaddr.sin_addr.s_addr=*(int*)(*hp->h_addr_list);

}

int ret = connect(sock,(sockaddr*)&servaddr,sizeof(servaddr));//建立连接

if (ret == SOCKET_ERROR)

{

return false;

}

return true;

}

bool CSendMail::Logon(SOCKET &sock)

{

recv(sock,m_cReceiveBuff,1024,0);

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

sprintf_s(m_cSendBuff,"HELO []\\r\\n");

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);//开始会话

recv(sock,m_cReceiveBuff,1024,0);

if(m_cReceiveBuff[0]!='2' || m_cReceiveBuff[1]!='5' || m_cReceiveBuff[2]!='0')

{

return false;

}

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

sprintf_s(m_cSendBuff,"AUTH LOGIN\\r\\n");

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);//请求登录

recv(sock,m_cReceiveBuff,1024,0);

if(m_cReceiveBuff[0]!='3' || m_cReceiveBuff[1]!='3' || m_cReceiveBuff[2]!='4')

{

return false;

}

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

Char2Base64(m_cSendBuff,m_sMailInfo.m_pcUserName,strlen(m_sMailInfo.m_pcUserName));

m_cSendBuff[strlen(m_cSendBuff)]='\\r';

m_cSendBuff[strlen(m_cSendBuff)]='\\n';

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);//发送用户名

recv(sock,m_cReceiveBuff,1024,0);

if(m_cReceiveBuff[0]!='3' || m_cReceiveBuff[1]!='3' || m_cReceiveBuff[2]!='4')

{

return false;

}

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

Char2Base64(m_cSendBuff,m_sMailInfo.m_pcUserPassWord,strlen(m_sMailInfo.m_pcUserPassWord));

m_cSendBuff[strlen(m_cSendBuff)]='\\r';

m_cSendBuff[strlen(m_cSendBuff)]='\\n';

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);//发送用户密码

recv(sock,m_cReceiveBuff,1024,0);

if(m_cReceiveBuff[0]!='2' || m_cReceiveBuff[1]!='3' || m_cReceiveBuff[2]!='5')

{

return false;

}

return true;//登录成功

}

bool CSendMail::SendHead(SOCKET &sock)

{

int rt;

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

sprintf_s(m_cSendBuff,"MAIL FROM:<%s>\\r\\n",m_sMailInfo.m_pcSender);

rt=send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

if(rt!=strlen(m_cSendBuff))

{

return false;

}

recv(sock,m_cReceiveBuff,1024,0);

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

sprintf_s(m_cSendBuff,"RCPT TO:<%s>\\r\\n",m_sMailInfo.m_pcReceiver);

rt=send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

if(rt!=strlen(m_cSendBuff))

{

return false;

}

recv(sock,m_cReceiveBuff,1024,0);

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

memcpy(m_cSendBuff,"DATA\\r\\n",strlen("DATA\\r\\n"));

rt=send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

if(rt!=strlen(m_cSendBuff))

{

return false;

}

recv(sock,m_cReceiveBuff,1024,0);

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

sprintf_s(m_cSendBuff,"From:\\"%s\\"<%s>\\r\\n",m_sMailInfo.m_pcSenderName,m_sMailInfo.m_pcSender);

sprintf_s(&m_cSendBuff[strlen(m_cSendBuff)],150,"To:\\"INVT.COM.CN\\"<%s>\\r\\n",m_sMailInfo.m_pcReceiver);

sprintf_s(&m_cSendBuff[strlen(m_cSendBuff)],150,"Subject:%s\\r\\nMime-Version: 1.0\\r\\nContent-Type: multipart/mixed; boundary=\\"INVT\\"\\r\\n\\r\\n",m_sMailInfo.m_pcTitle);

rt=send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

if(rt!=strlen(m_cSendBuff))

{

return false;

}

return true;

}

bool CSendMail::SendTextBody(SOCKET &sock)

{

int rt;

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

sprintf_s(m_cSendBuff,"--INVT\\r\\nContent-Type: text/plain;\\r\\n charset=\\"gb2312\\"\\r\\n\\r\\n%s\\r\\n\\r\\n",m_sMailInfo.m_pcBody);

rt=send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

if(rt!=strlen(m_cSendBuff))

{

return false;

}

else

{

return true;

}

}

bool CSendMail::SendFileBody(SOCKET &sock)

{

int i;

char* filePath;

int rt;

int len;

int pt=0;

char fileName[128];

for(i=0;i<m_pcFilePathList.GetCount();i++)

{

pt=0;

memset(fileName,0,128);

filePath=m_pcFilePathList.GetAt(m_pcFilePathList.FindIndex(i));

len=GetFileData(filePath);

GetFileName(fileName,filePath);

sprintf_s(m_cSendBuff,"--INVT\\r\\nContent-Type: application/octet-stream;\\r\\n name=\\"%s\\"\\r\\nContent-Transfer-Encoding: base64\\r\\nContent-Disposition: attachment;\\r\\n filename=\\"%s\\"\\r\\n\\r\\n",fileName,fileName);

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

while (pt<len)

{

memset(m_cSendBuff,0,sizeof(m_cSendBuff));

Char2Base64(m_cSendBuff,&m_pcFileBuff[pt],min(len-pt,3000));

m_cSendBuff[strlen(m_cSendBuff)]='\\r';

m_cSendBuff[strlen(m_cSendBuff)]='\\n';

rt=send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

pt+=min(len-pt,3000);

if(rt!=strlen(m_cSendBuff))

{

return false;

}

}

if(len!=0)

{

delete [] m_pcFileBuff;

}

}

return true;

}

bool CSendMail::SendEnd(SOCKET &sock)

{

sprintf_s(m_cSendBuff,"--INVT--\\r\\n.\\r\\n");

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

sprintf_s(m_cSendBuff,"QUIT\\r\\n");

send(sock,m_cSendBuff,strlen(m_cSendBuff),0);

closesocket(sock);

WSACleanup();

return true;

}

bool CSendMail::SendMail(sMailInfo &smailInfo)

{

memcpy(&m_sMailInfo,&smailInfo,sizeof(smailInfo));

if(m_sMailInfo.m_pcBody==NULL

|| m_sMailInfo.m_pcIPAddr==NULL

|| m_sMailInfo.m_pcIPName==NULL

|| m_sMailInfo.m_pcReceiver==NULL

|| m_sMailInfo.m_pcSender==NULL

|| m_sMailInfo.m_pcSenderName==NULL

|| m_sMailInfo.m_pcTitle==NULL

|| m_sMailInfo.m_pcUserName==NULL

|| m_sMailInfo.m_pcUserPassWord==NULL)

{

return false;

}

SOCKET sock;

if(!CReateSocket(sock))//建立连接

{

return false;

}

if(!Logon(sock))//登录邮箱

{

return false;

}

if(!SendHead(sock))//发送邮件头

{

return false;

}

if(!SendTextBody(sock))//发送邮件文本部分

{

return false;

}

if(!SendFileBody(sock))//发送附件

{

return false;

}

if(!SendEnd(sock))//结束邮件,并关闭sock

{

return false;

}

return true;

}

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