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package common
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import (
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"bytes"
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"crypto/tls"
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"fmt"
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"log"
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"mime"
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"net"
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"net/smtp"
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)
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var(
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ErrorInvalidMailConfig = fmt.Errorf("mail config error")
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)
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var DefaultMail *MailService
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//邮件配置
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type MailConfig struct {
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Host string
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Port int
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From string
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Password string
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IsUseSsl bool
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}
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//初始化邮件服务
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func InitMailService(mail *MailConfig){
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DefaultMail = NewMailService(mail)
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}
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type MailService struct {
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Config *MailConfig
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}
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func NewMailService(config *MailConfig)*MailService{
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return &MailService{
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Config:config,
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}
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}
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//to: 邮件发送目标 多个
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func (mail *MailService)SendMail(to []string, subject string, body []byte)(err error){
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if err =mail.CheckConfig();err!=nil{
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return
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}
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address :=fmt.Sprintf("%v:%v",mail.Config.Host,mail.Config.Port)
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auth := smtp.PlainAuth("", mail.Config.From, mail.Config.Password, mail.Config.Host)
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if !mail.Config.IsUseSsl{ //qq 普通发送 端口25
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// hostname is used by PlainAuth to validate the TLS certificate.
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err = smtp.SendMail(address, auth, mail.Config.From,to, body)
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if err != nil {
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return err
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}
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return
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}
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if err=SendMailUsingTLS(address, auth, mail.Config.From,to, body);err!=nil{
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return
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}
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return
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}
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//检查配置
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func(mail *MailService)CheckConfig()error{
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config :=mail.Config
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if len(config.Host)==0 || len(config.From)==0 || config.Port==0 || len(config.Password)==0{
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return ErrorInvalidMailConfig
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}
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return nil
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}
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//邮件内容
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type MailContent struct {
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ToMail string
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Subject string
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Body []byte
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ContentType string //html /plain
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}
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//发送邮件
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func SendMail(content *MailContent)(err error){
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if DefaultMail==nil{
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return ErrorInvalidMailConfig
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}
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var to,subject,contentType string
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var body []byte
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to = content.ToMail
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subject = content.Subject
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contentType = content.ContentType
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if contentType==""{
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contentType="text/html; charset=UTF-8"
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}
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header :=make(map[string]string)
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header["From"] = mime.BEncoding.Encode("utf-8",DefaultMail.Config.From) //from 使用其他字符串,显示xx发送 代发为 DefaultMail.Config.From
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header["To"] = to
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header["Subject"] = mime.BEncoding.Encode("utf-8",subject)
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header["Content-Type"] = contentType
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var buf bytes.Buffer
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for k, v := range header {
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buf.WriteString(fmt.Sprintf("%s: %s\r\n", k, v))
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}
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buf.WriteString("\r\n")
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buf.Write(body)
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return DefaultMail.SendMail([]string{to},subject,buf.Bytes())
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}
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//使用 ssl发送 端口465
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//return a smtp client
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func Dial(addr string) (*smtp.Client, error) {
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conn, err := tls.Dial("tcp", addr, nil)
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if err != nil {
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log.Panicln("Dialing Error:", err)
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return nil, err
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}
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//分解主机端口字符串
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host, _, _ := net.SplitHostPort(addr)
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return smtp.NewClient(conn, host)
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}
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//参考net/smtp的func SendMail()
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//使用net.Dial连接tls(ssl)端口时,smtp.NewClient()会卡住且不提示err
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//len(to)>1时,to[1]开始提示是密送
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func SendMailUsingTLS(addr string, auth smtp.Auth, from string,
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to []string, msg []byte) (err error) {
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//create smtp client
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c, err := Dial(addr)
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if err != nil {
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log.Println("Create smpt client error:", err)
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return err
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}
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defer c.Close()
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if auth != nil {
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if ok, _ := c.Extension("AUTH"); ok {
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if err = c.Auth(auth); err != nil {
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log.Println("Error during AUTH", err)
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return err
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}
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}
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}
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if err = c.Mail(from); err != nil {
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return err
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}
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for _, addr := range to {
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if err = c.Rcpt(addr); err != nil {
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return err
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}
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}
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w, err := c.Data()
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if err != nil {
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return err
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}
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_, err = w.Write(msg)
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if err != nil {
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return err
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}
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err = w.Close()
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if err != nil {
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return err
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}
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return c.Quit()
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} |
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\ No newline at end of file |
...
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...
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