MFC 基于SMTP POP3协议 写的邮件收发

#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) { setlocale(LC_ALL,"Chinese-simplified"); 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 ) { setlocale(LC_ALL,"Chinese-simplified"); 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(