gotosocial/internal/email/util.go
Daenney 5e2bf0bdca
[chore] Improve copyright header handling (#1608)
* [chore] Remove years from all license headers

Years or year ranges aren't required in license headers. Many projects
have removed them in recent years and it avoids a bit of yearly toil.

In many cases our copyright claim was also a bit dodgy since we added
the 2021-2023 header to files created after 2021 but you can't claim
copyright into the past that way.

* [chore] Add license header check

This ensures a license header is always added to any new file. This
avoids maintainers/reviewers needing to remember to check for and ask
for it in case a contribution doesn't include it.

* [chore] Add missing license headers

* [chore] Further updates to license header

* Use the more common // indentend comment format
* Remove the hack we had for the linter now that we use the // format
* Add SPDX license identifier
2023-03-12 16:00:57 +01:00

71 lines
2.3 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 (
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"text/template"
)
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_*"))
}
// https://datatracker.ietf.org/doc/html/rfc2822
// I did not read the RFC, I just copy and pasted from
// https://pkg.go.dev/net/smtp#SendMail
// and it did seem to work.
func assembleMessage(mailSubject string, mailBody string, mailTo string, mailFrom string) ([]byte, error) {
if strings.Contains(mailSubject, "\r") || strings.Contains(mailSubject, "\n") {
return nil, errors.New("email subject must not contain newline characters")
}
if strings.Contains(mailFrom, "\r") || strings.Contains(mailFrom, "\n") {
return nil, errors.New("email from address must not contain newline characters")
}
if strings.Contains(mailTo, "\r") || strings.Contains(mailTo, "\n") {
return nil, errors.New("email to address must not contain newline characters")
}
// normalize the message body to use CRLF line endings
mailBody = strings.ReplaceAll(mailBody, "\r\n", "\n")
mailBody = strings.ReplaceAll(mailBody, "\n", "\r\n")
msg := []byte(
"To: " + mailTo + "\r\n" +
"Subject: " + mailSubject + "\r\n" +
"\r\n" +
mailBody + "\r\n",
)
return msg, nil
}