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85 lines
2.3 KiB
85 lines
2.3 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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"html/template" |
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"io" |
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"net/http" |
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"net/mail" |
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"net/textproto" |
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"github.com/ProtonMail/proton-bridge/pkg/pmapi" |
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) |
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func WriteHeader(w io.Writer, h textproto.MIMEHeader) (err error) { |
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if err = http.Header(h).Write(w); err != nil { |
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return |
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} |
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_, err = io.WriteString(w, "\r\n") |
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return |
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} |
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const customMessageTemplate = ` |
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<html> |
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<head></head> |
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<body style="font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 14px;"> |
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<div style="color:#555; background-color:#cf9696; padding:20px; border-radius: 4px;"> |
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<strong>Decryption error</strong><br/> |
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Decryption of this message's encrypted content failed. |
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<pre>{{.Error}}</pre> |
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</div> |
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{{if .AttachBody}} |
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<div style="color:#333; background-color:#f4f4f4; border: 1px solid #acb0bf; border-radius: 2px; padding:1rem; margin:1rem 0; font-family:monospace; font-size: 1em;"> |
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<pre>{{.Body}}</pre> |
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</div> |
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{{- end}} |
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</body> |
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</html> |
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` |
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type customMessageData struct { |
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Error string |
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AttachBody bool |
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Body string |
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} |
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func CustomMessage(m *pmapi.Message, decodeError error, attachBody bool) error { |
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t := template.Must(template.New("customMessage").Parse(customMessageTemplate)) |
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b := new(bytes.Buffer) |
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if err := t.Execute(b, customMessageData{ |
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Error: decodeError.Error(), |
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AttachBody: attachBody, |
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Body: m.Body, |
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}); err != nil { |
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return err |
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} |
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m.MIMEType = pmapi.ContentTypeHTML |
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m.Body = b.String() |
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// NOTE: we need to set header in custom message header, so we check that is non-nil. |
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if m.Header == nil { |
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m.Header = make(mail.Header) |
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} |
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return nil |
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}
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