SMTP VS C++实现向多人发送邮件，可带多个附件

来源：互联网发布：2016全球华人网络春晚编辑：程序博客网时间：2024/06/03 18:54

#ifndef __SMTP_H__ //避免重复包含#define __SMTP_H__#include <list>#include <WinSock2.h>#include <iostream>#include <fstream>#include <string>#include <sstream>const int MAXLEN = 1024;const int MAX_FILE_LEN = 6000;static const char base64Char[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";struct FILEINFO /*用来记录文件的一些信息*/{    char fileName[128]; /*文件名称*/    char filePath[256]; /*文件绝对路径*/};class CSmtp{public:    CSmtp(void);    CSmtp(        int port,        std::string srvDomain,  //smtp服务器域名        std::string userName,   //用户名        std::string password,   //密码        std::string targetEmail, //目的邮件地址        std::string emailTitle,  //主题        std::string content       //内容        );public:    ~CSmtp(void);public:    int port;public:    std::string domain;    std::string user;    std::string pass;    std::string targetAddr;    std::string title;    std::string content;    /*为了方便添加文件，删除文件神马的，使用list容器最为方便，相信大家在数据结构里面都学过*/    std::list <FILEINFO *> listFile;public:    char buff[MAXLEN + 1];    int buffLen;    SOCKET sockClient;  //客户端的套接字public:    bool CreateConn(); /*创建连接*/    bool Send(std::string &message);    bool Recv();    void FormatEmailHead(std::string &email);//格式化要发送的邮件头部    int Login();    bool SendEmailHead();       //发送邮件头部信息    bool SendTextBody();        //发送文本信息    //bool SendAttachment();        //发送附件    int SendAttachment_Ex();    bool SendEnd();public:    void AddAttachment(std::string &filePath); //添加附件    void DeleteAttachment(std::string &filePath); //删除附件    void DeleteAllAttachment(); //删除所有的附件    void SetSrvDomain(std::string &domain);    void SetUserName(std::string &user);    void SetPass(std::string &pass);    void SetTargetEmail(std::string &targetAddr);    void SetEmailTitle(std::string &title);    void SetContent(std::string &content);    void SetPort(int port);    int SendEmail_Ex();    /*关于错误码的说明:1.网络错误导致的错误2.用户名错误3.密码错误4.文件不存在0.成功*/    char* base64Encode(char const* origSigned, unsigned origLength);};#endif // !__SMTP_H__

smtp.cpp#include "StdAfx.h"#include "smtp.h"#pragma  comment(lib, "ws2_32.lib") /*链接ws2_32.lib动态链接库*//*base64采用别人的编码,不过，这不是重点，重点是我完成了我的一个比较好的邮件发送客户端*/char* CSmtp::base64Encode(char const* origSigned, unsigned origLength){    unsigned char const* orig = (unsigned char const*)origSigned; // in case any input bytes have the MSB set    if (orig == NULL) return NULL;    unsigned const numOrig24BitValues = origLength / 3;    bool havePadding = origLength > numOrig24BitValues * 3;    bool havePadding2 = origLength == numOrig24BitValues * 3 + 2;    unsigned const numResultBytes = 4 * (numOrig24BitValues + havePadding);    char* result = new char[numResultBytes + 3]; // allow for trailing '/0'    // Map each full group of 3 input bytes into 4 output base-64 characters:    unsigned i;    for (i = 0; i < numOrig24BitValues; ++i)    {        result[4 * i + 0] = base64Char[(orig[3 * i] >> 2) & 0x3F];        result[4 * i + 1] = base64Char[(((orig[3 * i] & 0x3) << 4) | (orig[3 * i + 1] >> 4)) & 0x3F];        result[4 * i + 2] = base64Char[((orig[3 * i + 1] << 2) | (orig[3 * i + 2] >> 6)) & 0x3F];        result[4 * i + 3] = base64Char[orig[3 * i + 2] & 0x3F];    }    // Now, take padding into account.  (Note: i == numOrig24BitValues)    if (havePadding)    {        result[4 * i + 0] = base64Char[(orig[3 * i] >> 2) & 0x3F];        if (havePadding2)        {            result[4 * i + 1] = base64Char[(((orig[3 * i] & 0x3) << 4) | (orig[3 * i + 1] >> 4)) & 0x3F];            result[4 * i + 2] = base64Char[(orig[3 * i + 1] << 2) & 0x3F];        }        else        {            result[4 * i + 1] = base64Char[((orig[3 * i] & 0x3) << 4) & 0x3F];            result[4 * i + 2] = '=';        }        result[4 * i + 3] = '=';    }    result[numResultBytes] = '\0';    return result;}CSmtp::CSmtp(void){    this->content = "";    this->port = 25;    this->user = "";    this->pass = "";    this->targetAddr = "";    this->title = "";    this->domain = "";    WORD wVersionRequested;    WSADATA wsaData;    int err;    wVersionRequested = MAKEWORD(2, 1);    err = WSAStartup(wVersionRequested, &wsaData);    this->sockClient = 0;}CSmtp::~CSmtp(void){    DeleteAllAttachment();    closesocket(sockClient);    WSACleanup();}CSmtp::CSmtp(    int port,    std::string srvDomain,    std::string userName,    std::string password,    std::string targetEmail,    std::string emailTitle,    std::string content    ){    this->content = content;    this->port = port;    this->user = userName;    this->pass = password;    this->targetAddr = targetEmail;    this->title = emailTitle;    this->domain = srvDomain;    WORD wVersionRequested;    WSADATA wsaData;    int err;    wVersionRequested = MAKEWORD(2, 1);    err = WSAStartup(wVersionRequested, &wsaData);    this->sockClient = 0;}bool CSmtp::CreateConn(){    //为建立socket对象做准备，初始化环境    SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0); //建立socket对象    SOCKADDR_IN addrSrv;    HOSTENT* pHostent;    pHostent = gethostbyname(domain.c_str());  //得到有关于域名的信息    addrSrv.sin_addr.S_un.S_addr = *((DWORD *)pHostent->h_addr_list[0]);    //得到smtp服务器的网络字节序的ip地址       addrSrv.sin_family = AF_INET;    addrSrv.sin_port = htons(port);    int err = connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));   //向服务器发送请求     if (err != 0)    {        return false;        //printf("链接失败\n");    }    this->sockClient = sockClient;    if (false == Recv())    {        return false;    }    return true;}bool CSmtp::Send(std::string &message){    int err = send(sockClient, message.c_str(), message.length(), 0);    if (err == SOCKET_ERROR)    {        return false;    }    std::string message01;    return true;}bool CSmtp::Recv(){    memset(buff, 0, sizeof(char)* (MAXLEN + 1));    int err = recv(sockClient, buff, MAXLEN, 0); //接收数据    if (err == SOCKET_ERROR)    {        return false;    }    buff[err] = '\0';    return true;}int CSmtp::Login(){    std::string sendBuff;    sendBuff = "EHLO ";    sendBuff += user; // 这一部分需要通过telnet验证一下    sendBuff += "\r\n";    if (false == Send(sendBuff) || false == Recv()) //既接收也发送    {        return 1; /*1表示发送失败由于网络错误*/    }    sendBuff.empty();    sendBuff = "AUTH LOGIN\r\n";    if (false == Send(sendBuff) || false == Recv()) //请求登陆    {        return 1; /*1表示发送失败由于网络错误*/    }    sendBuff.empty();    int pos = user.find('@', 0);    sendBuff = user.substr(0, pos); //得到用户名    char *ecode;    /*在这里顺带扯一句，关于string类的length函数与C语言中的strlen函数的区别,strlen计算出来的长度，只到'\0'字符为止,而string::length()函数实际上返回的是string类中字符数组的大小,你自己可以测试一下，这也是为什么我下面不使用string::length()的原因*/    ecode = base64Encode(sendBuff.c_str(), strlen(sendBuff.c_str()));    sendBuff.empty();    sendBuff = ecode;    sendBuff += "\r\n";    delete[]ecode;    if (false == Send(sendBuff) || false == Recv()) //发送用户名，并接收服务器的返回    {        return 1; /*错误码1表示发送失败由于网络错误*/    }    sendBuff.empty();    ecode = base64Encode(pass.c_str(), strlen(pass.c_str()));    sendBuff = ecode;    sendBuff += "\r\n";    delete[]ecode;    if (false == Send(sendBuff) || false == Recv()) //发送用户密码，并接收服务器的返回    {        return 1; /*错误码1表示发送失败由于网络错误*/    }    if (NULL != strstr(buff, "550"))    {        return 2;/*错误码2表示用户名错误*/    }    if (NULL != strstr(buff, "535")) /*535是认证失败的返回*/    {        return 3; /*错误码3表示密码错误*/    }    return 0;}bool CSmtp::SendEmailHead()     //发送邮件头部信息{    std::string sendBuff;    sendBuff = "MAIL FROM: <" + user + ">\r\n";    if (false == Send(sendBuff) || false == Recv())    {        return false; /*表示发送失败由于网络错误*/    }    std::istringstream is(targetAddr);    std::string tmpadd;    while(is>>tmpadd)    {        sendBuff.empty();        sendBuff = "RCPT TO: <" + tmpadd + ">\r\n";        if (false == Send(sendBuff) || false == Recv())        {            return false; /*表示发送失败由于网络错误*/        }    }    sendBuff.empty();    sendBuff = "DATA\r\n";    if (false == Send(sendBuff) || false == Recv())    {        return false; //表示发送失败由于网络错误    }    sendBuff.empty();    FormatEmailHead(sendBuff);    if (false == Send(sendBuff))        //发送完头部之后不必调用接收函数,因为你没有\r\n.\r\n结尾，服务器认为你没有发完数据，所以不会返回什么值    {        return false; /*表示发送失败由于网络错误*/    }    return true;}void CSmtp::FormatEmailHead(std::string &email){/*格式化要发送的内容*/    email = "From: ";    email += user;    email += "\r\n";    email += "To: ";    email += targetAddr;    email += "\r\n";    email += "Subject: ";    email += title;    email += "\r\n";    email += "MIME-Version: 1.0";    email += "\r\n";    email += "Content-Type: multipart/mixed;boundary=qwertyuiop";    email += "\r\n";    email += "\r\n";}bool CSmtp::SendTextBody()  /*发送邮件文本*/{    std::string sendBuff;    sendBuff = "--qwertyuiop\r\n";    sendBuff += "Content-Type: text/plain;";    sendBuff += "charset=\"gb2312\"\r\n\r\n";    sendBuff += content;    sendBuff += "\r\n\r\n";    return Send(sendBuff);}int CSmtp::SendAttachment_Ex() /*发送附件*/{    for (std::list<FILEINFO *>::iterator pIter = listFile.begin(); pIter != listFile.end(); pIter++)    {        //cout << "Attachment is sending ~~~~~" << endl;        //cout << "Please be patient!" << endl;        std::string sendBuff;        sendBuff = "--qwertyuiop\r\n";        sendBuff += "Content-Type: application/octet-stream;\r\n";        sendBuff += " name=\"";        sendBuff += (*pIter)->fileName;        sendBuff += "\"";        sendBuff += "\r\n";        sendBuff += "Content-Transfer-Encoding: base64\r\n";        sendBuff += "Content-Disposition: attachment;\r\n";        sendBuff += " filename=\"";        sendBuff += (*pIter)->fileName;        sendBuff += "\"";        sendBuff += "\r\n";        sendBuff += "\r\n";        Send(sendBuff);        std::ifstream ifs((*pIter)->filePath, std::ios::in | std::ios::binary);        if (false == ifs.is_open())        {            return 4; /*错误码4表示文件打开错误*/        }        char fileBuff[MAX_FILE_LEN];        char *chSendBuff;        memset(fileBuff, 0, sizeof(fileBuff));        /*文件使用base64加密传送*/        while (ifs.read(fileBuff, MAX_FILE_LEN))        {            //cout << ifs.gcount() << endl;            chSendBuff = base64Encode(fileBuff, MAX_FILE_LEN);            chSendBuff[strlen(chSendBuff)] = '\r';            chSendBuff[strlen(chSendBuff)] = '\n';            send(sockClient, chSendBuff, strlen(chSendBuff), 0);            delete[]chSendBuff;        }        //cout << ifs.gcount() << endl;        chSendBuff = base64Encode(fileBuff, ifs.gcount());        chSendBuff[strlen(chSendBuff)] = '\r';        chSendBuff[strlen(chSendBuff)] = '\n';        int err = send(sockClient, chSendBuff, strlen(chSendBuff), 0);        if (err != strlen(chSendBuff))        {            //cout << "文件传送出错!" << endl;            return 1;        }        delete[]chSendBuff;    }    return 0;}bool CSmtp::SendEnd() /*发送结尾信息*/{    std::string sendBuff;    sendBuff = "--qwertyuiop--";    sendBuff += "\r\n.\r\n";    if (false == Send(sendBuff) || false == Recv())    {        return false;    }    //cout << buff << endl;    sendBuff.empty();    sendBuff = "QUIT\r\n";    return (Send(sendBuff) && Recv());}int CSmtp::SendEmail_Ex(){    if (false == CreateConn())    {        return 1;    }    //Recv();    int err = Login(); //先登录    if (err != 0)    {        return err; //错误代码必须要返回    }    if (false == SendEmailHead()) //发送EMAIL头部信息    {        return 1; /*错误码1是由于网络的错误*/    }    if (false == SendTextBody())    {        return 1; /*错误码1是由于网络的错误*/    }    err = SendAttachment_Ex();    if (err != 0)    {        return err;    }    if (false == SendEnd())    {        return 1; /*错误码1是由于网络的错误*/    }    return 0; /*0表示没有出错*/}void CSmtp::AddAttachment(std::string &filePath) //添加附件{    FILEINFO *pFile = new FILEINFO;    strcpy_s(pFile->filePath, filePath.c_str());    const char *p = filePath.c_str();    strcpy_s(pFile->fileName, p + filePath.find_last_of("\\") + 1);    listFile.push_back(pFile);}void CSmtp::DeleteAttachment(std::string &filePath) //删除附件{    std::list<FILEINFO *>::iterator pIter;    for (pIter = listFile.begin(); pIter != listFile.end(); pIter++)    {        if (strcmp((*pIter)->filePath, filePath.c_str()) == 0)        {            FILEINFO *p = *pIter;            listFile.remove(*pIter);            delete p;            break;        }    }}void CSmtp::DeleteAllAttachment() /*删除所有的文件*/{    for (std::list<FILEINFO *>::iterator pIter = listFile.begin(); pIter != listFile.end();)    {        FILEINFO *p = *pIter;        pIter = listFile.erase(pIter);        delete p;    }}void CSmtp::SetSrvDomain(std::string &domain){    this->domain = domain;}void CSmtp::SetUserName(std::string &user){    this->user = user;}void CSmtp::SetPass(std::string &pass){    this->pass = pass;}void CSmtp::SetTargetEmail(std::string &targetAddr){    this->targetAddr = targetAddr;}void CSmtp::SetEmailTitle(std::string &title){    this->title = title;}void CSmtp::SetContent(std::string &content){    this->content = content;}void CSmtp::SetPort(int port){    this->port = port;}
测试程序#include "Smtp.h"#include <iostream>using namespace std;int main(){    CSmtp smtp(        25,                             /*smtp端口*/        "smtp.163.com",                 /*smtp服务器地址*/        "yourname@163.com",         /*你的邮箱地址*/        "yourpasswd",                   /*邮箱密码*/        "target1@163.com target2@163.com",  /*目的邮箱地址,这一部分用空格分割可添加多个收信人*/        "消息",                           /*主题*/        "消息提示"      /*邮件正文*/        );    /**    //添加附件时注意,\一定要写成\\，因为转义字符的缘故    string filePath("D:\\课程设计报告.doc");    smtp.AddAttachment(filePath);    */    /*还可以调用CSmtp::DeleteAttachment函数删除附件，还有一些函数，自己看头文件吧!*/    //filePath = "C:\\Users\\李懿虎\\Desktop\\sendEmail.cpp";    //smtp.AddAttachment(filePath);    int err;    if ((err = smtp.SendEmail_Ex()) != 0)    {        if (err == 1)            cout << "错误1: 由于网络不畅通，发送失败!" << endl;        if (err == 2)            cout << "错误2: 用户名错误,请核对!" << endl;        if (err == 3)            cout << "错误3: 用户密码错误，请核对!" << endl;        if (err == 4)            cout << "错误4: 请检查附件目录是否正确，以及文件是否存在!" << endl;    }    system("pause");    return 0;}

阅读全文

0 0