/
media_email.go
159 lines (132 loc) · 3.02 KB
/
media_email.go
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package notices
import (
"crypto/tls"
"errors"
"net"
"net/mail"
"net/smtp"
"time"
)
// 邮件媒介
type NoticeEmailMedia struct {
SMTP string `yaml:"smtp" json:"smtp"`
Username string `yaml:"username" json:"username"`
Password string `yaml:"password" json:"password"`
From string `yaml:"from" json:"from"`
}
// 获取新对象
func NewNoticeEmailMedia() *NoticeEmailMedia {
return &NoticeEmailMedia{}
}
func (this *NoticeEmailMedia) Send(user string, subject string, body string) (resp []byte, err error) {
if len(this.SMTP) == 0 {
return nil, errors.New("host address should be specified")
}
// 自动加端口
if _, _, err := net.SplitHostPort(this.SMTP); err != nil {
this.SMTP += ":587"
}
if len(this.From) == 0 {
this.From = this.Username
}
contentType := "Content-Type: text/html; charset=UTF-8"
msg := []byte("To: " + user + "\r\nFrom: \"TeaWeb\" <" + this.From + ">\r\nSubject: " + subject + "\r\n" + contentType + "\r\n\r\n" + body)
return nil, this.SendMail(this.From, []string{user}, msg)
}
// 是否需要用户标识
func (this *NoticeEmailMedia) RequireUser() bool {
return true
}
func (this *NoticeEmailMedia) SendMail(from string, to []string, message []byte) error {
serverName := this.SMTP
username := this.Username
password := this.Password
_, err := mail.ParseAddress(from)
if err != nil {
return err
}
if len(to) == 0 {
return errors.New("recipients should not be empty")
}
for _, to1 := range to {
_, err := mail.ParseAddress(to1)
if err != nil {
return err
}
}
host, port, _ := net.SplitHostPort(serverName)
var client *smtp.Client
// TLS config
tlsConfig := &tls.Config{
InsecureSkipVerify: true,
ServerName: host,
}
// 587 port: prefer START_TLS
if port == "587" {
conn, err := net.DialTimeout("tcp", serverName, 10*time.Second)
if err != nil {
conn, err := tls.Dial("tcp", serverName, tlsConfig)
if err != nil {
return err
}
client, err = smtp.NewClient(conn, host)
if err != nil {
return err
}
} else {
client, err = smtp.NewClient(conn, host)
if err != nil {
return err
}
client.StartTLS(tlsConfig)
}
} else {
conn, err := tls.Dial("tcp", serverName, tlsConfig)
if err != nil {
conn, err := net.DialTimeout("tcp", serverName, 10*time.Second)
if err != nil {
return err
}
client, err = smtp.NewClient(conn, host)
if err != nil {
return err
}
client.StartTLS(tlsConfig)
} else {
client, err = smtp.NewClient(conn, host)
if err != nil {
return err
}
}
}
// Auth
auth := smtp.PlainAuth("", username, password, host)
if err := client.Auth(auth); err != nil {
return err
}
// To && From
if err := client.Mail(from); err != nil {
return err
}
for _, to1 := range to {
if err := client.Rcpt(to1); err != nil {
return err
}
}
// Data
w, err := client.Data()
if err != nil {
return err
}
_, err = w.Write(message)
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
client.Quit()
client.Close()
return nil
}