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