mirror of
https://github.com/superseriousbusiness/gotosocial
synced 2024-12-19 12:04:07 +01:00
114 lines
3.6 KiB
Go
114 lines
3.6 KiB
Go
// GoToSocial
|
|
// Copyright (C) GoToSocial Authors admin@gotosocial.org
|
|
// SPDX-License-Identifier: AGPL-3.0-or-later
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package email
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"net/smtp"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
"text/template"
|
|
|
|
"github.com/superseriousbusiness/gotosocial/internal/config"
|
|
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
|
)
|
|
|
|
func (s *sender) sendTemplate(template string, subject string, data any, toAddresses ...string) error {
|
|
buf := &bytes.Buffer{}
|
|
if err := s.template.ExecuteTemplate(buf, template, data); err != nil {
|
|
return err
|
|
}
|
|
|
|
msg, err := assembleMessage(subject, buf.String(), s.from, toAddresses...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := smtp.SendMail(s.hostAddress, s.auth, s.from, toAddresses, msg); err != nil {
|
|
return gtserror.SetType(err, gtserror.TypeSMTP)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func loadTemplates(templateBaseDir string) (*template.Template, error) {
|
|
if !filepath.IsAbs(templateBaseDir) {
|
|
cwd, err := os.Getwd()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error getting current working directory: %s", err)
|
|
}
|
|
templateBaseDir = filepath.Join(cwd, templateBaseDir)
|
|
}
|
|
|
|
// look for all templates that start with 'email_'
|
|
return template.ParseGlob(filepath.Join(templateBaseDir, "email_*"))
|
|
}
|
|
|
|
// assembleMessage assembles a valid email message following:
|
|
// - https://datatracker.ietf.org/doc/html/rfc2822
|
|
// - https://pkg.go.dev/net/smtp#SendMail
|
|
func assembleMessage(mailSubject string, mailBody string, mailFrom string, mailTo ...string) ([]byte, error) {
|
|
if strings.ContainsAny(mailSubject, "\r\n") {
|
|
return nil, errors.New("email subject must not contain newline characters")
|
|
}
|
|
|
|
if strings.ContainsAny(mailFrom, "\r\n") {
|
|
return nil, errors.New("email from address must not contain newline characters")
|
|
}
|
|
|
|
for _, to := range mailTo {
|
|
if strings.ContainsAny(to, "\r\n") {
|
|
return nil, errors.New("email to address must not contain newline characters")
|
|
}
|
|
}
|
|
|
|
// Normalize the message body to use CRLF line endings
|
|
const CRLF = "\r\n"
|
|
mailBody = strings.ReplaceAll(mailBody, CRLF, "\n")
|
|
mailBody = strings.ReplaceAll(mailBody, "\n", CRLF)
|
|
|
|
msg := bytes.Buffer{}
|
|
switch {
|
|
case len(mailTo) == 1:
|
|
// Address email directly to the one recipient.
|
|
msg.WriteString("To: " + mailTo[0] + CRLF)
|
|
case config.GetSMTPDiscloseRecipients():
|
|
// Simply address To all recipients.
|
|
msg.WriteString("To: " + strings.Join(mailTo, ", ") + CRLF)
|
|
default:
|
|
// Address To anonymous group.
|
|
//
|
|
// Email will be sent to all recipients but we shouldn't include Bcc header.
|
|
//
|
|
// From the smtp.SendMail function: 'Sending "Bcc" messages is accomplished by
|
|
// including an email address in the to parameter but not including it in the
|
|
// msg headers.'
|
|
msg.WriteString("To: Undisclosed Recipients:;" + CRLF)
|
|
}
|
|
msg.WriteString("From: " + mailFrom + CRLF)
|
|
msg.WriteString("Subject: " + mailSubject + CRLF)
|
|
msg.WriteString(CRLF)
|
|
msg.WriteString(mailBody)
|
|
msg.WriteString(CRLF)
|
|
|
|
return msg.Bytes(), nil
|
|
}
|