前言：
现在各位老铁们对“netsmtp抄送”大致比较看重，小伙伴们都需要了解一些“netsmtp抄送”的相关内容。那么小编在网摘上汇集了一些关于“netsmtp抄送””的相关知识，希望姐妹们能喜欢，咱们一起来了解一下吧！一、介绍：
c++实现smtp发送邮件，支持ssl的465端口发送，支持附件、一次发送多人、抄送等。
注1：转载自csdn的“樱花回忆”，原文链接为: ``
注2：我这里新增了支持html格式，原来只有text/plain普通文本。
二、依赖openssl库：ubuntu下安装:
sudo apt install libssl-dev
其它平台大家自行搜索了解，不难，哈哈哈！
三、发送邮件demo
// SendEmail函数重载，支持基本的简单发送文本邮件，和支持附件、抄送、以及发给多人的发送方式，亲测能够发送成功，默认发送的编码是utf-8格式#include <iostream>#include <stdio.h>#include "mail.h"// g++ -o main main.cpp mail.cpp -lssl -lcrypto// ./mainint main(){ std::string from = "xxxx@163.com"; std::string passs ="xxxxxx";//这里替换成自己的授权码 std::string to = "xxxx@qq.com"; std::string subject = "C++邮件发送测试"; std::string strMessage = "<p style=\"margin-top: 100px;\">这里是c++邮件发送测试......</p><h2>Hello C++</h2>"; std::vector<std::string> vecTo; //发送列表 vecTo.push_back("xxxx@qq.com"); std::vector<std::string> ccList; // ccList.push_back("xxx@xxx.com.cn");//抄送列表 std::vector<std::string> attachment; attachment.push_back("mail.h"); attachment.push_back("1.txt"); SmtpBase *base; SimpleSmtpEmail m_mail("smtp.163.com","25"); base = &m_mail; //base->SendEmail(from, passs, to, subject, strMessage);//普通的文本发送，明文发送 SimpleSslSmtpEmail m_ssl_mail("smtp.163.com","465"); // text/plain base=&m_ssl_mail; //base->SendEmail(from, passs, to, subject, strMessage); // base->SendEmail(from, passs,vecTo,subject,strMessage,attachment,ccList);//加密的发送，支持抄送、附件等 SimpleSslSmtpEmail m_ssl_mail2("smtp.163.com","465","text/html"); // html base=&m_ssl_mail2; //base->SendEmail(from, passs, to, subject, strMessage); base->SendEmail(from, passs,vecTo,subject,strMessage,attachment,ccList);//加密的发送，支持抄送、附件等 return 0;}效果图如下:
四、mail.h代码
// 依赖openssl: sudo apt install libssl-dev#pragma once#include <string>#include <vector>#include <map>#include <openssl/ossl_typ.h>#ifndef WIN32#include<netdb.h>#endifclass SmtpBase{protected: struct EmailInfo { std::string smtpServer; //the SMTP server std::string serverPort; //the SMTP server port std::string charset; //the email character set std::string sender; //the sender's name std::string senderEmail; //the sender's email std::string password; //the password of sender std::string recipient; //the recipient's name std::string recipientEmail; //the recipient's email std::map<std::string, std::string> recvList; //收件人列表<email, name> std::string subject; //the email message's subject 邮件主题 std::string message; //the email message body 邮件内容 std::map<std::string, std::string> ccEmail; //抄送列表 std::vector<std::string> attachment; //附件 };public: virtual ~SmtpBase() {} /** * @brief 简单发送文本邮件 * @param from 发送者的帐号 * @param passs 发送者密码 * @param to 收件人 * @param subject 主题 * @param strMessage 邮件内容 */ virtual int SendEmail(const std::string& from, const std::string& passs, const std::string& to, const std::string& subject, const std::string& strMessage) = 0; /** * @brief 发送邮件，包括附件以及抄送人和多个收件人 * @param from 发送者的帐号 * @param passs 发送者密码 * @param vecTo 收件人列表 * @param subject 主题 * @param strMessage 邮件内容 * @param attachment 附件列表 附件可以是绝对路径，默认是可执行程序目录下 * @param ccList 抄送列表 */ virtual int SendEmail(const std::string& from, const std::string& passs, const std::vector<std::string>& vecTo, const std::string& subject, const std::string& strMessage, const std::vector<std::string>& attachment,const std::vector<std::string>& ccList) = 0; std::string GetLastError() { return m_lastErrorMsg; } virtual int Read(void* buf, int num) = 0; virtual int Write(const void* buf, int num) = 0; virtual int Connect() = 0; virtual int DisConnect() = 0;protected: std::string m_lastErrorMsg;};class SmtpEmail : public SmtpBase{public: SmtpEmail(const std::string& emailHost, const std::string& port); SmtpEmail(const std::string& emailHost, const std::string& port, const std::string& content_type); ~SmtpEmail(); int SendEmail(const std::string& from, const std::string& passs, const std::string& to, const std::string& subject, const std::string& strMessage); int SendEmail(const std::string& from, const std::string& passs, const std::vector<std::string>& vecTo, const std::string& subject, const std::string& strMessage, const std::vector<std::string>& attachment, const std::vector<std::string>& ccList);protected: int Read(void* buf, int num); int Write(const void* buf, int num); int Connect(); int DisConnect(); virtual std::string GetEmailBody(const EmailInfo & info);private: //int SMTPSSLComunicate(SSL *connection, const EmailInfo &info); int SMTPComunicate(const EmailInfo &info);protected: addrinfo* m_addrinfo; int m_socketfd; std::string m_host; std::string m_port; std::string m_content_type; bool m_isConnected;};class SimpleSmtpEmail : public SmtpEmail{public: using SmtpEmail::SmtpEmail; virtual std::string GetEmailBody(const EmailInfo & info);};class SslSmtpEmail : public SmtpEmail{public: using SmtpEmail::SmtpEmail; ~SslSmtpEmail(); int Connect(); int DisConnect();protected: int Read(void* buf, int num); int Write(const void* buf, int num);private: SSL_CTX *m_ctx; SSL *m_ssl;};class SimpleSslSmtpEmail : public SslSmtpEmail{public: using SslSmtpEmail::SslSmtpEmail; virtual std::string GetEmailBody(const EmailInfo & info);};五、mail.cpp代码// 依赖openssl: sudo apt install libssl-dev#ifdef WIN32#include <WinSock2.h>#endif#include "mail.h"#include <fstream>#include <sstream>#include <iostream>#include <string.h>#include <openssl/err.h>#include <openssl/ssl.h>#ifdef WIN32#include <WinSock2.h>#include <WS2tcpip.h>#pragma comment(lib, "ws2_32.lib")#else #include <unistd.h>#include <arpa/inet.h>#include <sys/types.h> /* See NOTES */#include <sys/socket.h>#define INVALID_SOCKET -1#endiftemplate<typename T>std::string join(T& vecData, const std::string& delim){ if (vecData.size() <= 0) { return std::string(); } std::stringstream ss; for (auto& item : vecData) { ss << delim << item ; } return ss.str().substr(delim.length());}const char MimeTypes[][2][128] ={ { "***", "application/octet-stream" }, { "csv", "text/csv" }, { "tsv", "text/tab-separated-values" }, { "tab", "text/tab-separated-values" }, { "html", "text/html" }, { "htm", "text/html" }, { "doc", "application/msword" }, { "docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document" }, { "ods", "application/x-vnd.oasis.opendocument.spreadsheet" }, { "odt", "application/vnd.oasis.opendocument.text" }, { "rtf", "application/rtf" }, { "sxw", "application/vnd.sun.xml.writer" }, { "txt", "text/plain" }, { "xls", "application/vnd.ms-excel" }, { "xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" }, { "pdf", "application/pdf" }, { "ppt", "application/vnd.ms-powerpoint" }, { "pps", "application/vnd.ms-powerpoint" }, { "pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation" }, { "wmf", "image/x-wmf" }, { "atom", "application/atom+xml" }, { "xml", "application/xml" }, { "json", "application/json" }, { "js", "application/javascript" }, { "ogg", "application/ogg" }, { "ps", "application/postscript" }, { "woff", "application/x-woff" }, { "xhtml","application/xhtml+xml" }, { "xht", "application/xhtml+xml" }, { "zip", "application/zip" }, { "gz", "application/x-gzip" }, { "rar", "application/rar" }, { "rm", "application/vnd.rn-realmedia" }, { "rmvb", "application/vnd.rn-realmedia-vbr" }, { "swf", "application/x-shockwave-flash" }, { "au", "audio/basic" }, { "snd", "audio/basic" }, { "mid", "audio/mid" }, { "rmi", "audio/mid" }, { "mp3", "audio/mpeg" }, { "aif", "audio/x-aiff" }, { "aifc", "audio/x-aiff" }, { "aiff", "audio/x-aiff" }, { "m3u", "audio/x-mpegurl" }, { "ra", "audio/vnd.rn-realaudio" }, { "ram", "audio/vnd.rn-realaudio" }, { "wav", "audio/x-wave" }, { "wma", "audio/x-ms-wma" }, { "m4a", "audio/x-m4a" }, { "bmp", "image/bmp" }, { "gif", "image/gif" }, { "jpe", "image/jpeg" }, { "jpeg", "image/jpeg" }, { "jpg", "image/jpeg" }, { "jfif", "image/jpeg" }, { "png", "image/png" }, { "svg", "image/svg+xml" }, { "tif", "image/tiff" }, { "tiff", "image/tiff" }, { "ico", "image/vnd.microsoft.icon" }, { "css", "text/css" }, { "bas", "text/plain" }, { "c", "text/plain" }, { "h", "text/plain" }, { "rtx", "text/richtext" }, { "mp2", "video/mpeg" }, { "mpa", "video/mpeg" }, { "mpe", "video/mpeg" }, { "mpeg", "video/mpeg" }, { "mpg", "video/mpeg" }, { "mpv2", "video/mpeg" }, { "mov", "video/quicktime" }, { "qt", "video/quicktime" }, { "lsf", "video/x-la-asf" }, { "lsx", "video/x-la-asf" }, { "asf", "video/x-ms-asf" }, { "asr", "video/x-ms-asf" }, { "asx", "video/x-ms-asf" }, { "avi", "video/x-msvideo" }, { "3gp", "video/3gpp" }, { "3gpp", "video/3gpp" }, { "3g2", "video/3gpp2" }, { "movie","video/x-sgi-movie" }, { "mp4", "video/mp4" }, { "wmv", "video/x-ms-wmv" }, { "webm","video/webm" }, { "m4v", "video/x-m4v" }, { "flv", "video/x-flv" }};std::string fileBasename(const std::string path) { std::string filename = path.substr(path.find_last_of("/\\") + 1);//解析出文件名字 return filename;}std::string getFileContents(const char *filename){ std::ifstream in(filename, std::ios::in | std::ios::binary); if (in) { std::string contents; in.seekg(0, std::ios::end); contents.resize(in.tellg()); in.seekg(0, std::ios::beg); in.read(&contents[0], contents.size()); in.close(); return(contents); } else { printf("文件读取失败:%s\n",filename); return ""; }}//获取文件的后缀名 如xxx.jpg 获取的是jpgstd::string GetFileExtension(const std::string& FileName){ if (FileName.find_last_of(".") != std::string::npos) //find_last_of逆向查找在原字符串中最后一个与指定字符串（或字符）中的某个字符匹配的字符，返回它的位置。若查找失败，则返回npos。 return FileName.substr(FileName.find_last_of(".") + 1); return "";}const char* GetMimeTypeFromFileName(char* szFileExt){ for (unsigned int i = 0; i < sizeof(MimeTypes) / sizeof(MimeTypes[0]); i++) { if (strcmp(MimeTypes[i][0], szFileExt) == 0) { return MimeTypes[i][1]; } } return MimeTypes[0][1]; //if does not match any, "application/octet-stream" is returned}char* base64Encode(char const* origSigned, unsigned origLength){ static const char base64Char[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 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;}int SmtpEmail::SMTPComunicate(const EmailInfo &info){ if (Connect() != 0) { return -1; } char * buffer = new char[1000]; memset(buffer, 0, 1000); Read(buffer, 999); if (strncmp(buffer, "220", 3) != 0) // not equal to 220 { m_lastErrorMsg = buffer; return 220; } //向服务器发送ehlo std::string command = "ehlo EmailService\r\n"; Write(command.c_str(), command.length()); memset(buffer, 0, 1000); Read(buffer, 999); if (strncmp(buffer, "250", 3) != 0) // ehlo failed { m_lastErrorMsg = buffer; return 250; } //进行登录验证 command = "AUTH PLAIN "; std::string auth = '\0' + info.senderEmail + '\0' + info.password; command += base64Encode(auth.data(), auth.size()); command += "\r\n"; Write(command.c_str(), command.length()); memset(buffer, 0, 1000); Read(buffer, 999); if (strncmp(buffer, "235", 3) != 0) // login failed { m_lastErrorMsg = buffer; return 250; } //设置邮件发送者的邮箱地址 command = "mail FROM:<" + info.senderEmail + ">\r\n"; Write( command.c_str(), command.length()); memset(buffer, 0, 1000); Read(buffer, 999); if (strncmp(buffer, "250", 3) != 0) // not ok { m_lastErrorMsg = buffer; return 250; } //设置邮件接收者的邮箱地址 command = "RCPT TO:<" + info.recipientEmail + ">\r\n"; Write( command.c_str(), command.length()); memset(buffer, 0, 1000); Read( buffer, 999); if (strncmp(buffer, "250", 3) != 0) // not ok { m_lastErrorMsg = buffer; return 250; } //准备发送邮件 command = "data\r\n"; Write( command.c_str(), command.length()); memset(buffer, 0, 1000); Read( buffer, 999); if (strncmp(buffer, "354", 3) != 0) // not ready to receive message { m_lastErrorMsg = buffer; return 354; } command = std::move(GetEmailBody(info)); Write( command.c_str(), command.length()); memset(buffer, 0, 1000); Read(buffer, 999); if (strncmp(buffer, "250", 3) != 0) // not ok { m_lastErrorMsg = buffer; return 250; } //结束发送过程 delete buffer; Write( "quit\r\n", 6); DisConnect(); return 0;}std::string SmtpEmail::GetEmailBody(const EmailInfo &info){ //设定邮件的发送者名称、接收者名称、邮件主题，邮件内容。 std::ostringstream message; message << "From: =?" << info.charset << "?b?" << base64Encode(info.sender.c_str(), info.sender.length()) << "?= <" << info.senderEmail << ">\r\n"; std::vector<std::string> vecToList; for (auto item : info.recvList) { std::string to = "=?" + info.charset + "?b?" + base64Encode(item.second.c_str(), item.second.length()) + "?= <" + item.first + ">"; vecToList.push_back(to); } message << "To: " << join(vecToList, ",") << "\r\n"; message << "Subject: =?" << info.charset << "?b?" << base64Encode(info.subject.c_str(), info.subject.length()) << "?=\r\n"; message << "MIME-Version: 1.0\r\n"; if (info.ccEmail.size() > 0) { std::vector<std::string> vecCcList; for (auto item : info.ccEmail) { std::string cc = "=?" + info.charset + "?b?" + base64Encode(item.first.c_str(), item.first.length()) + "?= <" + item.second + ">"; vecCcList.push_back(cc); } message << "Cc:" << join(vecCcList, ",") << "\r\n"; } message << "Content-Type:multipart/mixed; boundary=\"Separator_ztq_000\"\r\n\r\n"; message << "--Separator_ztq_000\r\n"; message << "Content-Type: multipart/alternative; boundary=\"Separator_ztq_111\"\r\n\r\n"; message << "--Separator_ztq_111\r\n"; // message << "Content-Type: " << "text/plain" << "; charset=\"" << info.charset << "\"\r\n"; message << "Content-Type: " << m_content_type << "; charset=\"" << info.charset << "\"\r\n"; message << "Content-Transfer-Encoding: base64\r\n"; message << "\r\n"; //此处要加，不然邮件正文无内容 message << base64Encode(info.message.c_str(), info.message.length()); message << "\r\n\r\n"; message << "--Separator_ztq_111--\r\n"; //---------------------文件部分处理-------------------------------------- for (auto item : info.attachment) { std::string filename = fileBasename(item); std::string strContext = getFileContents(item.c_str()); if(strContext.empty()) { std::cerr << "请检查传入的文件路径是否正确,此路径文件添加到附件失败，不发送此文件:" << std::endl; std::cerr << item << std::endl; } else { std::string fileContext = base64Encode(strContext.c_str(), strContext.length()); std::string extension = GetFileExtension(filename); std::string mimetype = GetMimeTypeFromFileName((char*)extension.c_str()); message << "--Separator_ztq_000\r\n"; message << "Content-Type: " << mimetype << "; name=\"" << filename << "\"\r\n"; message << "Content-Transfer-Encoding: base64\r\n"; message << "Content-Disposition: attachment; filename=\"" << filename << "\"\r\n\r\n"; message << fileContext + "\r\n\r\n"; //把读取到的文件内容以二进制形式发送 } } //----------------------------------------------------------- message << "\r\n.\r\n"; return message.str();}SmtpEmail::SmtpEmail(const std::string& emailHost, const std::string& port) :m_host(emailHost), m_port(port), m_content_type("text/plain"){}SmtpEmail::SmtpEmail(const std::string& emailHost, const std::string& port, const std::string& content_type) :m_host(emailHost), m_port(port), m_content_type(content_type){}SmtpEmail::~SmtpEmail(){}int SmtpEmail::Read(void* buf, int num){ return recv(m_socketfd, (char*)buf, num, 0);}int SmtpEmail::Write(const void* buf, int num){ return send(m_socketfd, (char*)buf, num, 0);}int SmtpEmail::Connect(){#ifdef WIN32 //start socket connection WSADATA wsadata; WSAStartup(MAKEWORD(2, 2), &wsadata);#endif m_socketfd = socket(AF_INET, SOCK_STREAM, 0); if (m_socketfd == INVALID_SOCKET) { m_lastErrorMsg = "Error on creating socket fd."; return -1; } addrinfo inAddrInfo = { 0 }; inAddrInfo.ai_family = AF_INET; inAddrInfo.ai_socktype = SOCK_STREAM; printf("host:%s port:%s \n",m_host.c_str(), m_port.c_str()); if (getaddrinfo(m_host.c_str(), m_port.c_str(), &inAddrInfo, &m_addrinfo) != 0) // error occurs { m_lastErrorMsg = "Error on calling getadrrinfo()."; return -2; } if (connect(m_socketfd, m_addrinfo->ai_addr, m_addrinfo->ai_addrlen)) { m_lastErrorMsg = "Error on calling connect()."; return -3; } return 0;}int SmtpEmail::DisConnect(){ freeaddrinfo(m_addrinfo);#ifdef WIN32 closesocket(m_socketfd);#else close(m_socketfd);#endif return 0;}/*********************************************************************************/std::string SimpleSmtpEmail::GetEmailBody(const EmailInfo &info){ //设定邮件的发送者名称、接收者名称、邮件主题，邮件内容。 std::ostringstream message; message << "From: =?" << info.charset << "?b?" << base64Encode(info.sender.c_str(), info.sender.length()) << "?= <" << info.senderEmail << ">\r\n"; std::vector<std::string> vecToList; for (auto item : info.recvList) { std::string to = "=?" + info.charset + "?b?" + base64Encode(item.second.c_str(), item.second.length()) + "?= <" + item.first + ">"; vecToList.push_back(to); } message << "To: " << join(vecToList, ",") << "\r\n"; message << "Subject: =?" << info.charset << "?b?" << base64Encode(info.subject.c_str(), info.subject.length()) << "?=\r\n"; message << "MIME-Version: 1.0\r\n"; if (info.ccEmail.size() > 0) { std::vector<std::string> vecCcList; for (auto item : info.ccEmail) { std::string cc = "=?" + info.charset + "?b?" + base64Encode(item.first.c_str(), item.first.length()) + "?= <" + item.second + ">"; vecCcList.push_back(cc); } message << "Cc:" << join(vecCcList, ",") << "\r\n"; } message << "Content-Type:multipart/mixed; boundary=\"Separator_ztq_000\"\r\n\r\n"; message << "--Separator_ztq_000\r\n"; message << "Content-Type: multipart/alternative; boundary=\"Separator_ztq_111\"\r\n\r\n"; message << "--Separator_ztq_111\r\n"; // message << "Content-Type: " << "text/plain" << "; charset=\"" << info.charset << "\"\r\n"; message << "Content-Type: " << m_content_type << "; charset=\"" << info.charset << "\"\r\n"; message << "Content-Transfer-Encoding: base64\r\n"; message << "\r\n"; //此处要加，不然邮件正文无内容 message << base64Encode(info.message.c_str(), info.message.length()); message << "\r\n\r\n"; message << "--Separator_ztq_111--\r\n"; //---------------------文件部分处理-------------------------------------- for (auto item : info.attachment) { std::string filename = fileBasename(item); std::string strContext = getFileContents(item.c_str()); if(strContext.empty()) { std::cerr << "请检查传入的文件路径是否正确,此路径文件添加到附件失败，不发送此文件:" << std::endl; std::cerr << item << std::endl; } else { std::string fileContext = base64Encode(strContext.c_str(), strContext.length()); std::string extension = GetFileExtension(filename); std::string mimetype = GetMimeTypeFromFileName((char*)extension.c_str()); message << "--Separator_ztq_000\r\n"; message << "Content-Type: " << mimetype << "; name=\"" << filename << "\"\r\n"; message << "Content-Transfer-Encoding: base64\r\n"; message << "Content-Disposition: attachment; filename=\"" << filename << "\"\r\n\r\n"; message << fileContext + "\r\n\r\n"; //把读取到的文件内容以二进制形式发送 } } //----------------------------------------------------------- message << "\r\n.\r\n"; return message.str();}/***************************************************************************************************/SslSmtpEmail::~SslSmtpEmail(){}int SslSmtpEmail::Connect(){ if (SmtpEmail::Connect() == 0) { SSL_library_init(); OpenSSL_add_all_algorithms(); SSL_load_error_strings(); m_ctx = SSL_CTX_new(SSLv23_client_method()); m_ssl = SSL_new(m_ctx); SSL_set_fd(m_ssl, m_socketfd); SSL_connect(m_ssl); } return 0;}int SslSmtpEmail::DisConnect(){ SSL_shutdown(m_ssl); SSL_free(m_ssl); SSL_CTX_free(m_ctx); SmtpEmail::DisConnect(); return 0;}int SmtpEmail::SendEmail(const std::string& from, const std::string& passs, const std::string& to, const std::string& subject, const std::string& strMessage){ EmailInfo info; info.charset = "UTF-8"; info.sender = from; info.password = passs; info.senderEmail = from; info.recipientEmail = to; info.recvList[to] = ""; info.subject = subject; info.message = strMessage; return SMTPComunicate(info);}int SmtpEmail::SendEmail(const std::string& from, const std::string& passs, const std::vector<std::string>& vecTo, const std::string& subject, const std::string& strMessage, const std::vector<std::string>& attachment, const std::vector<std::string>& ccList){ std::vector<std::string> recvList; recvList.insert(recvList.end(), vecTo.begin(), vecTo.end()); recvList.insert(recvList.end(), ccList.begin(), ccList.end()); for (auto& item : recvList) { EmailInfo info; info.charset = "UTF-8"; info.sender = from; info.password = passs; info.senderEmail = from;; info.recipientEmail = item; for (auto item : vecTo) { info.recvList[item] = ""; } info.subject = subject; info.message = strMessage; for (auto& item : ccList) { info.ccEmail[item] = item; } info.attachment = attachment; if (SMTPComunicate(info) != 0) { return -1; } } return 0;}int SslSmtpEmail::Read(void * buf, int num){ int ret = SSL_read(m_ssl, buf, num); return ret;}int SslSmtpEmail::Write(const void * buf, int num){ return SSL_write(m_ssl, buf, num);}std::string SimpleSslSmtpEmail::GetEmailBody(const EmailInfo &info){ //设定邮件的发送者名称、接收者名称、邮件主题，邮件内容。 std::ostringstream message; message << "From: =?" << info.charset << "?b?" << base64Encode(info.sender.c_str(), info.sender.length()) << "?= <" << info.senderEmail << ">\r\n"; std::vector<std::string> vecToList; for (auto item : info.recvList) { std::string to = "=?" + info.charset + "?b?" + base64Encode(item.second.c_str(), item.second.length()) + "?= <" + item.first + ">"; vecToList.push_back(to); } message << "To: " << join(vecToList, ",") << "\r\n"; message << "Subject: =?" << info.charset << "?b?" << base64Encode(info.subject.c_str(), info.subject.length()) << "?=\r\n"; message << "MIME-Version: 1.0\r\n"; if (info.ccEmail.size() > 0) { std::vector<std::string> vecCcList; for (auto item : info.ccEmail) { std::string cc = "=?" + info.charset + "?b?" + base64Encode(item.first.c_str(), item.first.length()) + "?= <" + item.second + ">"; vecCcList.push_back(cc); } message << "Cc:" << join(vecCcList, ",") << "\r\n"; } message << "Content-Type:multipart/mixed; boundary=\"Separator_ztq_000\"\r\n\r\n"; message << "--Separator_ztq_000\r\n"; message << "Content-Type: multipart/alternative; boundary=\"Separator_ztq_111\"\r\n\r\n"; message << "--Separator_ztq_111\r\n"; // message << "Content-Type: " << "text/plain" << "; charset=\"" << info.charset << "\"\r\n"; message << "Content-Type: " << m_content_type << "; charset=\"" << info.charset << "\"\r\n"; message << "Content-Transfer-Encoding: base64\r\n"; message << "\r\n"; //此处要加，不然邮件正文无内容 message << base64Encode(info.message.c_str(), info.message.length()); message << "\r\n\r\n"; message << "--Separator_ztq_111--\r\n"; //---------------------文件部分处理-------------------------------------- for (auto item : info.attachment) { std::string filename = fileBasename(item); std::string strContext = getFileContents(item.c_str()); if(strContext.empty()) { std::cerr << "请检查传入的文件路径是否正确,此路径文件添加到附件失败，不发送此文件:" << std::endl; std::cerr << item << std::endl; } else { std::string fileContext = base64Encode(strContext.c_str(), strContext.length()); std::string extension = GetFileExtension(filename); std::string mimetype = GetMimeTypeFromFileName((char*)extension.c_str()); message << "--Separator_ztq_000\r\n"; message << "Content-Type: " << mimetype << "; name=\"" << filename << "\"\r\n"; message << "Content-Transfer-Encoding: base64\r\n"; message << "Content-Disposition: attachment; filename=\"" << filename << "\"\r\n\r\n"; message << fileContext + "\r\n\r\n"; //把读取到的文件内容以二进制形式发送 } } //----------------------------------------------------------- message << "\r\n.\r\n"; return message.str();}六、思考大家在工作中都有哪些发邮件场景、以及如何合理的进行邮件发送？
不会在用户点击获取邮件验证码就之间同步发送邮件吧，哈哈哈？
预告：在接下来的章节librdkafka（c/c++ kafka客户端库）中会结合邮件发送案例与大家分析。
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标签： #netsmtp抄送
