72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package email
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"text/template"
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)
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func loadTemplates(templateBaseDir string) (*template.Template, error) {
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cwd, err := os.Getwd()
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if err != nil {
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return nil, fmt.Errorf("error getting current working directory: %s", err)
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}
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// look for all templates that start with 'email_'
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tmPath := filepath.Join(cwd, fmt.Sprintf("%semail_*", templateBaseDir))
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return template.ParseGlob(tmPath)
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}
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// https://datatracker.ietf.org/doc/html/rfc2822
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// I did not read the RFC, I just copy and pasted from
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// https://pkg.go.dev/net/smtp#SendMail
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// and it did seem to work.
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func assembleMessage(mailSubject string, mailBody string, mailTo string, mailFrom string) ([]byte, error) {
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if strings.Contains(mailSubject, "\r") || strings.Contains(mailSubject, "\n") {
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return nil, errors.New("email subject must not contain newline characters")
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}
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if strings.Contains(mailFrom, "\r") || strings.Contains(mailFrom, "\n") {
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return nil, errors.New("email from address must not contain newline characters")
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}
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if strings.Contains(mailTo, "\r") || strings.Contains(mailTo, "\n") {
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return nil, errors.New("email to address must not contain newline characters")
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}
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// normalize the message body to use CRLF line endings
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mailBody = strings.ReplaceAll(mailBody, "\r\n", "\n")
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mailBody = strings.ReplaceAll(mailBody, "\n", "\r\n")
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msg := []byte(
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"To: " + mailTo + "\r\n" +
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"Subject: " + mailSubject + "\r\n" +
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"\r\n" +
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mailBody + "\r\n",
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)
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return msg, nil
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}
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