邮件正文及其附件的发送的C++实现
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来源
这段代码我花了整整一天来编写,如果转载,请注明出处,谢谢!
前面的一篇文章已经讲了如何发送邮件正文,原理我就不再叙述了,要了解的同学请到这里查看!
http://blog.csdn.net/lishuhuakai/article/details/27503503
网上很多发送邮件附件的代码都不能用,所以我用心写了一个,直接封装成了一个类,需要的同学可以直接调用这个类来发送邮件,使用的是纯C++,不含MFC,请放心使用。(在VS2013下测试完美通过!)
废话不多说,直接上代码!
Smtp.h
[cpp] view plaincopyprint?
- #include <WinSock2.h>
- #include <iostream>
- #include <string>
- #include <list>
- using namespace std;
- #pragma comment(lib, "ws2_32.lib") /*链接ws2_32.lib动态链接库*/
- 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,
- string srvDomain, //smtp服务器域名
- string userName, //用户名
- string password, //密码
- string targetEmail, //目的邮件地址
- string emailTitle, //主题
- string content //内容
- );
- public:
- ~CSmtp(void);
- public:
- int port;
- public:
- string domain;
- string user;
- string pass;
- string targetAddr;
- string title;
- 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*/
- 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(string &message);
- BOOL Recv();
- void FormatEmailHead(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(string &filePath); //添加附件
- void DeleteAttachment(string &filePath); //删除附件
- void DeleteAllAttachment(); //删除所有的附件
- 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);
- };
[cpp] view plaincopyprint?
- #include "stdafx.h"
- #include "Smtp.h"
- #include <iostream>
- #include <fstream>
- using namespace std;
- /*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,
- string srvDomain,
- string userName,
- string password,
- string targetEmail,
- string emailTitle,
- 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(string &message)
- {
- int err = send(sockClient, message.c_str(), message.length(), 0);
- if (err == SOCKET_ERROR)
- {
- return FALSE;
- }
- cout << message << endl;
- 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';
- cout << buff << endl;
- return TRUE;
- }
- int CSmtp::Login()
- {
- string sendBuff;
- sendBuff = "EHLO ";
- sendBuff += user;
- 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
- {
- 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*/
- }
- sendBuff.empty();
- sendBuff = "RCPT TO: <" + targetAddr + ">\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(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*/
- {
- 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 (list<FILEINFO *>::iterator pIter = listFile.begin(); pIter != listFile.end(); pIter++)
- {
- cout << "Attachment is sending ~~~~~" << endl;
- cout << "Please be patient!" << endl;
- 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);
- ifstream ifs((*pIter)->filePath,ios::in | 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*/
- {
- 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(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(string &filePath) //删除附件
- {
- 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 (list<FILEINFO *>::iterator pIter = listFile.begin(); pIter != listFile.end(); )
- {
- FILEINFO *p = *pIter;
- pIter = listFile.erase(pIter);
- delete p;
- }
- }
- void CSmtp::SetSrvDomain(string &domain)
- {
- this->domain = domain;
- }
- void CSmtp::SetUserName(string &user)
- {
- this->user = user;
- }
- void CSmtp::SetPass(string &pass)
- {
- this->pass = pass;
- }
- void CSmtp::SetTargetEmail(string &targetAddr)
- {
- this->targetAddr = targetAddr;
- }
- void CSmtp::SetEmailTitle(string &title)
- {
- this->title = title;
- }
- void CSmtp::SetContent(string &content)
- {
- this->content = content;
- }
- void CSmtp::SetPort(int port)
- {
- this->port = port;
- }
测试代码如下:
main.cpp
[cpp] view plaincopyprint?
- #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*/
- "it_is_just_a_test@163.com", /*你的邮箱地址*/
- "19930714lyh", /*邮箱密码*/
- "it_is_just_a_test@126.com", /*目的邮箱地址*/
- "好啊!", /*主题*/
- "李懿虎同学,你好!收到请回复!" /*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;
- }
在VS2005下面,很有可能会出现带中文的目录或者中文名文件打不开的情况,这个时候这么解决:在两个构造函数里面的第一句加上:setlocale(LC_ALL,"Chinese-simplified");这一句话即可解决!
在VS2013里面貌似这个程序可以运行,微软这朵奇葩!不说了!
请尽量不使用QQ邮箱登陆,因为我试过,貌似连不上。qq邮箱的服务器返回告诉你要求安全的连接,用SSL什么的,哎,qq也是朵奇葩!
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