SMTP协议发送邮件和附件

#include "stdafx.h"
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <winsock.h>


#include "base64.h"


#pragma comment( lib,"ws2_32.lib" ) 


#define WSVERS MAKEWORD(2, 0)


SOCKET connectTCP(const char *host, const char *service );
void errexit(const char *format, ...);


FILE* pf_log;


void ReveiveMsg(SOCKET sock, char* checkstr = "/r/n")
{
char buffer[1024];


fwrite("Server: ",1,strlen("Server: "),pf_log);
while(1){
int len = recv(sock,buffer,1024,0);
if (len <= 0) break;

fwrite(buffer,1,len,pf_log);


buffer[len] = 0;
printf("Server: %s",buffer);


//检测边界
if (strstr(buffer,checkstr)) break;
}


}


void SendMsg(SOCKET sock,char* msg)
{
fwrite("Client: ",1,strlen("Client: "),pf_log);


int msgLen = strlen(msg);
send(sock,msg,msgLen,0);
printf("Client: %s",msg);
fwrite(msg,1,msgLen,pf_log);
}


int main(int argc, char* argv[])
{
WSADATA wsadata;


if (WSAStartup(WSVERS, &wsadata) != 0)
errexit("WSAStartup failed/n");


pf_log = fopen("log.txt","wb");


// SOCKET sock = connectTCP("mail.hnu.cn","smtp");
SOCKET sock = connectTCP("smtp.163.com","smtp");


ReveiveMsg(sock); //服务器欢迎信息
SendMsg(sock,"EHLO 163.com/r/n"); //SMTP协议的握手信号
ReveiveMsg(sock,"250 8BITMIME/r/n"); 
SendMsg(sock,"AUTH LOGIN/r/n"); //开始认证登录
ReveiveMsg(sock);


//准备好用户名的base64编码
int codelen;
char username[]="ficefjb";
char *base64code;
base64code = base64_encode(username,strlen(username)); 
codelen = strlen(base64code);
char username_base64[256];
strcpy(username_base64,base64code);
username_base64[codelen] = 0x0d;
username_base64[codelen + 1] = 0x0a;
username_base64[codelen + 2] = 0;


SendMsg(sock,username_base64); //提交用户名
ReveiveMsg(sock);


//准备好密码的base64编码
printf("Please input password:/n");
char password[256];
SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE),ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);   
scanf("%s",password);
base64code = base64_encode(password,strlen(password)); 
codelen = strlen(base64code);
char password_base64[256];
strcpy(password_base64,base64code);
password_base64[codelen] = 0x0d;
password_base64[codelen + 1] = 0x0a;
password_base64[codelen + 2] = 0;


SendMsg(sock,password_base64); //提交密码
ReveiveMsg(sock); //返回235表示成功


SendMsg(sock,"MAIL FROM:<[email protected]>/r/n"); //提交发送者
ReveiveMsg(sock);
SendMsg(sock,"RCPT TO:<[email protected]>/r/n"); //提交接收者
ReveiveMsg(sock);






SendMsg(sock,"DATA/r/n"); //通知服务器下面是邮件
ReveiveMsg(sock);

//发送邮件头部信息
SendMsg(sock,"TO: [email protected]/r/nFROM: [email protected]/r/nSUBJECT: SMTP协议测试/r/nDate:2009-12-5/r/nX-Mailer:fice's mailer/r/n"); //邮件
SendMsg(sock,"MIMI-Version:1.0/r/n");
SendMsg(sock,"Content-Type:multipart/mixed;boundary=/"#BOUNDARY#/"/r/n/r/n"); //设置边界标识
SendMsg(sock,"Content-Transfer-Encoding:7bit/r/n/r/n");
SendMsg(sock,"This is a multi-part message in MIME format/r/n/r/n");


//发送邮件内容头部信息
SendMsg(sock,"--#BOUNDARY#/r/n");
SendMsg(sock,"Content-Type: text/plain;charset=gb2312/r/n");
SendMsg(sock,"Content-Transfer-Encoding:printable/r/n/r/n");

//发送邮件的内容部分
SendMsg(sock,"SMTP协议测试：发送附件/n----by fice 2009.12.5/r/n");

//发送附件头部信息
SendMsg(sock,"--#BOUNDARY#/r/n");
SendMsg(sock,"Content-Type:text/plain;name=student.txt/r/n");
SendMsg(sock,"Content-Transfer-Encoding:base64/r/n");
SendMsg(sock,"Content-Disposition:attachment;filename=/"student.txt/"/r/n/r/n");

//用二进制方式读取附件文件内容并转为base64格式
FILE* pf = fopen("d://student.txt","rb");
fseek(pf,0,SEEK_END);
int filelen = ftell(pf);
fseek(pf,0,SEEK_SET);
char* filebuf = (char*) malloc(filelen);
fread(filebuf,1,filelen,pf);
char* filebase64 = base64_encode(filebuf,filelen);


//发送邮件的附件部分
SendMsg(sock,filebase64);

SendMsg(sock,"/r/n./r/n"); //邮件内容结束

ReveiveMsg(sock);
SendMsg(sock,"QUIT/r/n"); //通知服务器退出
ReveiveMsg(sock);
 
fclose(pf_log);


closesocket(sock);
WSACleanup();


printf("Press any key to quit./n");
getche();


return 0;
}