package main

//  this is a golang script for zabbix email alert
//  usage:
//      1 go build sendmail.go
//	2 ./sendmail email_address subject content
//  author: wong

import (
	"encoding/base64"
	"fmt"
	"net/mail"
	"net/smtp"
	"os"
)

func sendmail(to_list, subject, content string) error {
	smtpServer := "smtp.xxx.com"
	smtpPort := "25"
	user := "xxx@xxx.com"
	pass := "xxx"

	auth := smtp.PlainAuth("", user, pass, smtpServer)
	from := mail.Address{"alert", user}

	header := make(map[string]string)
	header["From"] = from.String()
	header["To"] = to_list
	header["Subject"] = subject
	header["MIME-Version"] = "1.0"
	header["Content-Type"] = "text/plain;charset=\"utf-8\""
	header["Content-Transfer-Encoding"] = "base64"

	message := ""
	for k, v := range header {
		message += fmt.Sprintf("%s:%s\r\n", k, v)
	}
	message += "\r\n" + base64.StdEncoding.EncodeToString([]byte(content))
	err := smtp.SendMail(smtpServer+":"+smtpPort, auth, user, []string{to_list}, []byte(message))
	return err
}

func main() {
	err := sendmail(os.Args[1], os.Args[2], os.Args[3])

	if err != nil {
		fmt.Println(err)
	} else {
		fmt.Println("Send mail success!")
	}
}