mirror of
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114 lines
3.4 KiB
Go
114 lines
3.4 KiB
Go
package mail
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import (
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"fmt"
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"mime"
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"net"
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"net/smtp"
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"strings"
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"time"
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"heckel.io/ntfy/v2/log"
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)
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const (
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emailVerificationSubject = "Verify your email for ntfy"
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passwordResetSubject = "Reset your ntfy password"
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)
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// Config holds the SMTP configuration for the mail sender
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type Config struct {
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SMTPAddr string // SMTP server address (host:port)
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SMTPUser string // SMTP auth username
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SMTPPass string // SMTP auth password
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From string // Sender email address
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}
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// Sender sends emails via SMTP, including the magic-link emails for email verification and
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// password reset. Pending verification/reset state lives in the database (see user.Manager),
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// not in this struct.
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type Sender struct {
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config *Config
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}
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// NewSender creates a new mail Sender with the given SMTP config
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func NewSender(config *Config) *Sender {
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return &Sender{config: config}
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}
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// Close is a no-op, kept so callers don't need to special-case the sender. The sender holds
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// no background goroutines (magic-link expiry is swept by the user.Manager reaper).
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func (s *Sender) Close() {
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// Nothing to do
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}
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// Addr returns the SMTP server address
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func (s *Sender) Addr() string {
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return s.config.SMTPAddr
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}
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// User returns the SMTP username
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func (s *Sender) User() string {
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return s.config.SMTPUser
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}
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// From returns the sender email address
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func (s *Sender) From() string {
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return s.config.From
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}
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// SendRaw sends a raw email message via SMTP
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func (s *Sender) SendRaw(to string, message []byte) error {
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host, _, err := net.SplitHostPort(s.config.SMTPAddr)
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if err != nil {
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return err
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}
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var auth smtp.Auth
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if s.config.SMTPUser != "" {
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auth = smtp.PlainAuth("", s.config.SMTPUser, s.config.SMTPPass, host)
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}
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return smtp.SendMail(s.config.SMTPAddr, auth, s.config.From, []string{to}, message)
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}
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// Send sends a plain text email via SMTP
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func (s *Sender) Send(to, subject, body string) error {
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date := time.Now().UTC().Format(time.RFC1123Z)
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encodedSubject := mime.BEncoding.Encode("utf-8", subject)
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message := `From: ntfy <{from}>
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To: {to}
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Date: {date}
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Subject: {subject}
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Content-Type: text/plain; charset="utf-8"
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{body}`
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message = strings.ReplaceAll(message, "{from}", s.config.From)
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message = strings.ReplaceAll(message, "{to}", to)
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message = strings.ReplaceAll(message, "{date}", date)
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message = strings.ReplaceAll(message, "{subject}", encodedSubject)
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message = strings.ReplaceAll(message, "{body}", body)
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log.Tag("mail").Field("email_to", to).Debug("Sending email")
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return s.SendRaw(to, []byte(message))
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}
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// SendEmailVerification sends an email containing a magic link to verify ownership of the
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// recipient address. The link carries a one-time token validated against the database.
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func (s *Sender) SendEmailVerification(to, link string) error {
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body := fmt.Sprintf(`Click the link below to verify this email address for your ntfy account:
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%s
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This link expires in 24 hours. If you did not request this, you can safely ignore this email.`, link)
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return s.Send(to, emailVerificationSubject, body)
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}
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// SendPasswordReset sends an email containing a magic link to set a new password. The link
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// carries a one-time token validated against the database.
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func (s *Sender) SendPasswordReset(to, link string) error {
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body := fmt.Sprintf(`Click the link below to set a new password for your ntfy account:
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%s
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This link expires in 1 hour. If you did not request this, you can safely ignore this email -- your password will not change.`, link)
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return s.Send(to, passwordResetSubject, body)
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}
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