发送邮件
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <unistd.h>
#include <netinet/in.h>
#include <limits.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <ctype.h>
bool CFileUploadFTP::SendAlarmMail(std::string file, uint32_t size, std::string recv_mail_addr)
{
const char* szServer = "smtp.126.com";
short nPort = 25;
int sockfd;
struct sockaddr_in server_addr;
struct hostent *host;
//取得主机IP地址
if((host=gethostbyname(szServer))==NULL)
{
logn_error(5,"gethostname error: [%s]", strerror(errno));
return false;
}
//建立SOCKET连接
if((sockfd=socket(AF_INET,SOCK_STREAM,0)) == -1)
{
logn_error(5,"Socket Error:[%s]>", strerror(errno));
return false;
}
// 客户程序填充服务端的信息
bzero(&server_addr,sizeof(server_addr));
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(nPort);
server_addr.sin_addr=*((struct in_addr *)host->h_addr);
//客户程序发起连接请求
if(connect(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr))==-1)
{
logn_error(5,"Connect Error:[%s]>", strerror(errno));
return false;
}
char szBuf[1024] = {0};
char buf[256] = {0};
char server[256] = {0};
gethostname(server,256);
strcpy(buf, "HELO ");
strcat(buf, szServer);
strcat(buf, " \r\n");
// Wait for a reply
recv(sockfd,szBuf,sizeof(szBuf)+1,0);
send(sockfd, buf, strlen(buf), 0);
recv(sockfd, szBuf, sizeof(szBuf), 0);
//发送准备登陆信息
send(sockfd, "AUTH LOGIN\r\n", strlen("AUTH LOGIN\r\n"), 0);
recv(sockfd, szBuf, sizeof(szBuf), 0);
//发送用户名和密码,必须用base64进行转码,对于126邮箱来说用户名是@前面的字符串
send(sockfd,"转码后的用户名\r\n", strlen("转码后的密码\r\n"),0);
recv(sockfd, szBuf, sizeof(szBuf),0);
send(sockfd,"WnlqXzIxNjU5Mw==\r\n", strlen("WnlqXzIxNjU5Mw==\r\n"), 0);
recv(sockfd, szBuf, sizeof(szBuf),0);
logn_info(5,"\nrecv login rerurn info:%s", szBuf);
//发送[发送邮件]的邮箱，该邮箱要与用户名一致，否则发送不成功
send(sockfd,"MAIL FROM: <xxxx@126.com>\r\n",strlen("MAIL FROM: <xxxx@126.com>\r\n"),0);
recv(sockfd, szBuf, sizeof(szBuf), 0);
//发送[接收邮件]的邮箱
char dat_buf[1024] = {0};
sprintf(dat_buf, "RCPT TO: <%s>\r\n", recv_mail_addr.c_str());
send(sockfd,dat_buf,strlen(dat_buf),0);
recv(sockfd, szBuf, sizeof(szBuf), 0);
//发送主题
//char mail_data[1024] = {0};
sprintf(dat_buf, "From: \"xxxx.126.com\"<xxxx@126.com>\r\nTo: %s\r\nSubject:file:[%s],size:[%d]\r\n", \
recv_mail_addr.c_str(), file.substr(12).c_str(), size);
//告诉邮件服务器，准备发送邮件内容
send(sockfd,"DATA\r\n", strlen("DATA\r\n"),0);
//发送邮件标题
send(sockfd,dat_buf, strlen(dat_buf),0);
//发送邮件内容
//send(sockfd,"hello 126\r\n", strlen("hello 126\r\n"),0);
//发送邮件结束
send(sockfd,"\r\n.\r\n", strlen("\r\n.\r\n"),0);
//接收邮件服务器返回信息
recv(sockfd,szBuf,sizeof(szBuf),0);
//发送结束会话标识
send(sockfd,"QUIT\r\n", strlen("QUIT\r\n"),0);
recv(sockfd,szBuf,sizeof(szBuf),0);
logn_info(5,"Data received QUIT: %s", szBuf);
close(sockfd);
return true;
}
调用方法：SendAlarmMail("/opt/dis/v1/work/personnel/150627B0016000200024_RYFZ_20210119171951.TXT", 1024000, "xxxx.163.com");
方法2：基于libesmtp库发送邮件。
安装方法： yum install -y libesmtp-devel
编译方法 g++ xxx.cpp -o mail -lesmtp
#define _XOPEN_SOURCE // 定义系统环境，使符合X/Open标准
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <getopt.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <stdarg.h>
#include <libesmtp.h> // 包含libesmtp函数库
int main()
{
smtp_session_t session;// 定义SMTP会话
smtp_message_t message;// 定义SMTP消息结构
struct sigaction sa; // 该结构包含收到信号后程序的行为
const smtp_status_t *status;// 用于保存SMTP状态
char buf[128];// 用于文件的缓冲区
FILE *fp; // 文件标识符
// 创建SMTP会话
if((session = smtp_create_session ()) == NULL)
{
fprintf (stderr, "创建会话失败：%s\n",smtp_strerror (smtp_errno (), buf, sizeof(buf)));
return 1;
}
// 从SMTP会话中接受消息，判断是否成功
if((message = smtp_add_message (session)) == NULL)
{
fprintf (stderr, "服务器无应答：%s\n",smtp_strerror (smtp_errno (), buf, sizeof(buf)));
return 1;
}
sa.sa_handler = SIG_IGN; // 避免进程僵死
sigemptyset(&sa.sa_mask); // 初始化信号集
sa.sa_flags = 0; // 使信息不被阻塞
sigaction (SIGPIPE, &sa, NULL); // 设置信号行为
smtp_set_server (session, "127.0.0.1:25"); // 设置SMTP服务器地址与端口
smtp_set_reverse_path (message, "GitHub"); // 设置发送者邮箱地址
smtp_set_header (message, "To", NULL, NULL); // 使邮件头包含目的地邮箱地址
smtp_set_header (message, "Subject", " 你大爷的!"); // 使邮件头包含主题
smtp_set_header_option (message, "Subject", Hdr_OVERRIDE, 1); // 使用默认的邮件头设置
fprintf(stderr, "%s\n", "SMTP服务器设置成功");
if ((fp = fopen ("./mail.cpp", "r")) == NULL)
{
perror("打开文件失败");
return 1;
}
smtp_set_message_fp (message, fp); //将文件中的内容作为邮件消息内容
smtp_add_recipient (message,"xxxx@126.com"); // 为消息添加一个容器,接受者邮箱地址
//smtp_add_recipient (message,"chuanwen.gu@thermofisher.com");
if (!smtp_start_session (session))
{ //连接SMTP服务器传送邮件
fprintf (stderr, "SMTP server problem %s\n",
smtp_strerror (smtp_errno (), buf, sizeof buf));
}
else
{
status = smtp_message_transfer_status (message); // 获取发送状态
printf ("%d %s", status->code,(status->text != NULL) ? status->text : "\n");
}
smtp_destroy_session (session); // 结束SMTP会话
if(fp != NULL) fclose(fp); // 关闭文件
return 0;
}
方法3：windows vs2017下一个发送邮件类
Csmtp.h
#pragma once #include <iostream> #include <string> #include <vector> #include <fstream> #include <WinSock2.h> //适用平台 Windows #pragma comment(lib, "ws2_32.lib") /*链接ws2_32.lib动态链接库*/ // POP3服务器（端口：110） Csmtp服务器（端口：25） using namespace std; class Csmtp { public: Csmtp(); ~Csmtp(); Csmtp( int _port, //端口25 string _domain, //域名 string _user, //发送者的邮箱 string _pass, //密码 string _target) //目标邮箱 :m_port(_port), m_domain(_domain), m_user(_user), m_pass(_pass), m_target(_target) {}; bool CReateSocket(); void setTitle(string tem) { m_title = tem; } void setContent(string tem) { m_content = tem; } /*发送附件*/ int SendAttachment(SOCKET &sockClient); int SendMail(); void addfile(string str) { filename.push_back(str); } private: int m_port; string m_domain; string m_user; string m_pass; string m_target; string m_title; //邮件标题 string m_content; //邮件内容 HOSTENT* m_pHostent; SOCKET m_sockClient; //客户端的套接字 vector <string> filename; //存储附件名的向量 };
Csmtp.cpp
#include "stdafx.h" #include "Csmtp.h" #include <Ws2tcpip.h> static const char base64Char[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; Csmtp::Csmtp() { } Csmtp::~Csmtp() { } char* 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; } int Csmtp::SendAttachment(SOCKET &m_sockClient) { for (std::vector<string>::iterator iter = filename.begin(); iter != filename.end(); iter++) { cout << "Attachment is sending··· " << endl; string path = *iter; ifstream ifs(path, ios::in | ios::binary); //'或链接2个属性，以输入、二进制打开' if (false == ifs.is_open()) { cout << "无法打开文件！" << endl; return 1; } string sendstring; sendstring = "--@boundary@\r\nContent-Type: application/octet-stream; name=\"1.jpg\"\r\n"; sendstring += "Content-Disposition: attachment; filename=\"1.jpg\"\r\n"; sendstring += "Content-Transfer-Encoding: base64\r\n\r\n"; send(m_sockClient, sendstring.c_str(), sendstring.length(), 0); //infile.read((char*)buffer,sizeof(数据类型)); // get length of file: ifs.seekg(0, ifs.end); int length = ifs.tellg(); ifs.seekg(0, ifs.beg); cout << "length:" << length << endl; // allocate memory: char * buffer = new char[length]; // read data as a block: ifs.read(buffer, length); ifs.close(); char *pbase; pbase = base64Encode(buffer, length); delete[]buffer; string str(pbase); delete[]pbase; str += "\r\n"; int err = send(m_sockClient, str.c_str(), strlen(str.c_str()), 0); if (err != strlen(str.c_str())) { cout << "附件发送出错!" << endl; return 1; } } return 0; } bool Csmtp::CReateSocket() { WSADATA wsaData; WORD wVersionRequested = MAKEWORD(2, 1); //WSAStarup，即WSA(Windows SocKNDs Asynchronous，Windows套接字异步)的启动命令 int err = WSAStartup(wVersionRequested, &wsaData); cout << "WSAStartup(0:successful):" << err << endl; char namebuf[128]; //获得本地计算机名 string ip_list; if (0 == gethostname(namebuf, 128)) { struct hostent* pHost; //获得本地IP地址 pHost = gethostbyname(namebuf); //pHost返回的是指向主机的列表 for (int i = 0; pHost != NULL && pHost->h_addr_list[i] != NULL; i++) { string tem = inet_ntoa(*(struct in_addr *)pHost->h_addr_list[i]); ip_list += tem; ip_list += "\n"; } } else { cout << "获取主机信息失败..." << endl; } m_title = namebuf;// 邮件标题 m_content = ip_list; //主机ip m_sockClient = socket(AF_INET, SOCK_STREAM, 0); //建立socket对象 m_pHostent = gethostbyname(m_domain.c_str()); //得到有关于域名的信息 if (m_pHostent == NULL) { printf("创建连接失败，也许没联网！\n"); return false; } return true; } int Csmtp::SendMail() { char *ecode; char buff[512]; //recv函数返回的结果 int err = 0; string message; SOCKADDR_IN addrServer; //服务端地址 addrServer.sin_addr.S_un.S_addr = *((DWORD *)m_pHostent->h_addr_list[0]); //得到smtp服务器的网络字节序的ip地址 addrServer.sin_family = AF_INET; addrServer.sin_port = htons(m_port); //连接端口25 //int connect (SOCKET s , const struct sockaddr FAR *name , int namelen ); err = connect(m_sockClient, (SOCKADDR*)&addrServer, sizeof(SOCKADDR)); //向服务器发送请求 cout << "connect:" << err << endl; //telnet smtp.126.com 25 连接服务器结束 buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "connect:" << buff << endl; message = "ehlo 126.com\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "helo:" << buff << endl; message = "auth login \r\n"; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "auth login:" << buff << endl; //上传邮箱名 message = m_user; ecode = base64Encode(message.c_str(), strlen(message.c_str())); message = ecode; message += "\r\n"; delete[]ecode; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "usrname:" << buff << endl; //上传邮箱密码 message = m_pass; ecode = base64Encode(message.c_str(), strlen(message.c_str())); message = ecode; delete[]ecode; message += "\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "password:" << buff << endl; message = "mail from:<" + m_user + ">\r\nrcpt to:<" + m_target + ">\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "mail from: " << buff << endl; buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "rcpt to: " << buff << endl; message = "data\r\n";//data要单独发送一次 send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "data: " << buff << endl; ///-----------------------------------------DATA------------------------------------- //要使用Csmtp 发送附件, 需要对Csmtp 头信息进行说明, 改变Content-type 及为每一段正文添加BOUNDARY 名, cout << "-------------------DATA------------------------" << endl; // 头 message = "from:" + m_user + "\r\nto:" + m_target + "\r\nsubject:" + m_title + "\r\n"; message += "MIME-Version: 1.0\r\n"; message += "Content-Type: multipart/mixed;boundary=@boundary@\r\n\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); // 正文 message = "--@boundary@\r\nContent-Type: text/plain;charset=\"gb2312\"\r\n\r\n" + m_content + "\r\n\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); // 发送附件 SendAttachment(m_sockClient); /*发送结尾信息*/ message = "--@boundary@--\r\n.\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "end_qwertyuiop:" << buff << endl; message = "QUIT\r\n"; send(m_sockClient, message.c_str(), message.length(), 0); buff[recv(m_sockClient, buff, 500, 0)] = '\0'; cout << "Send mail is finish:" << buff << endl; return 0; }
测试文件:
main.cpp
// sendMail.cpp: 定义控制台应用程序的入口点。 #include "stdafx.h" #include <iostream> #include "Csmtp.h" using namespace std; int main() { Csmtp mail( 25, "smtp.126.com", "yaxt_alarm_mail@126.com",// 来源邮箱 "xxxx", //密码 "xxxx@126.com" //目标邮箱 ); if (!mail.CReateSocket()) { cout << "ReateSocket failed!" << endl; return -1; } //标题默认是主机名，内容默认是ip mail.setTitle("test mail tow"); mail.setContent("this is content."); //附件路径错误，不影响邮件正文的发送。 //mail.addfile("test.jpg"); //添加附件 //mail.addfile("test2.png"); //添加附件 mail.SendMail(); //类主函数 system("pause"); return 0; }
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