mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-10 12:46:46 +00:00
72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
|
|
//
|
|
// This file is part of ProtonMail Bridge.
|
|
//
|
|
// ProtonMail Bridge is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// ProtonMail Bridge 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 General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
package message
|
|
|
|
import (
|
|
"bytes"
|
|
escape "html"
|
|
"strings"
|
|
|
|
"github.com/andybalholm/cascadia"
|
|
"golang.org/x/net/html"
|
|
)
|
|
|
|
func plaintextToHTML(text string) (output string) {
|
|
text = escape.EscapeString(text)
|
|
text = strings.Replace(text, "\n\r", "<br>", -1)
|
|
text = strings.Replace(text, "\r\n", "<br>", -1)
|
|
text = strings.Replace(text, "\n", "<br>", -1)
|
|
text = strings.Replace(text, "\r", "<br>", -1)
|
|
|
|
return "<div>" + text + "</div>"
|
|
}
|
|
|
|
func stripHTML(input string) (stripped string, err error) {
|
|
reader := strings.NewReader(input)
|
|
doc, _ := html.Parse(reader)
|
|
body := cascadia.MustCompile("body").MatchFirst(doc)
|
|
var buf1 bytes.Buffer
|
|
if err = html.Render(&buf1, body); err != nil {
|
|
stripped = input
|
|
return
|
|
}
|
|
stripped = buf1.String()
|
|
// Handle double body tags edge case.
|
|
if strings.Index(stripped, "<body") == 0 {
|
|
startIndex := strings.Index(stripped, ">")
|
|
if startIndex < 5 {
|
|
return
|
|
}
|
|
stripped = stripped[startIndex+1:]
|
|
// Closing body tag is optional.
|
|
closingIndex := strings.Index(stripped, "</body>")
|
|
if closingIndex > -1 {
|
|
stripped = stripped[:closingIndex]
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func addOuterHTMLTags(input string) (output string) {
|
|
return "<html><head></head><body>" + input + "</body></html>"
|
|
}
|
|
|
|
func makeEmbeddedImageHTML(cid, name string) (output string) {
|
|
return "<img class=\"proton-embedded\" alt=\"" + name + "\" src=\"cid:" + cid + "\">"
|
|
}
|