We build too many walls and not enough bridges

internal/imap/utils.go

@@ -0,0 +1,32 @@
+// 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 imap
+
+import (
+	"io"
+	"net/http"
+	"net/textproto"
+)
+
+func writeHeader(w io.Writer, h textproto.MIMEHeader) (err error) {
+	if err = http.Header(h).Write(w); err != nil {
+		return
+	}
+	_, err = io.WriteString(w, "\r\n")
+	return
+}