From 5b52110399e991fa03480bfeb529e1fd0749fcc3 Mon Sep 17 00:00:00 2001
From: Leah Neukirchen <leah@vuxu.org>
Date: Sun, 9 May 2021 16:23:18 +0200
Subject: mmime: do not duplicate Content* headers

Do not add additional Content-Type and Content-Transfer-Encoding headers
when using mmime on input already containing them.

Do not reencode the message if Content-Transfer-Encoding is set.

Based on a patch by Felix Van der Jeugt and duncaen.
---
 t/1000-mmime.t | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

(limited to 't/1000-mmime.t')

diff --git a/t/1000-mmime.t b/t/1000-mmime.t
index b0b0dc5..47ca63b 100755
--- a/t/1000-mmime.t
+++ b/t/1000-mmime.t
@@ -1,7 +1,7 @@
 #!/bin/sh -e
 cd ${0%/*}
 . ./lib.sh
-plan 8
+plan 12
 
 cat <<EOF >tmp
 References: <aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa@a> <bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb@b> <ccccccccccccccccccccccccccccccc@c>
@@ -42,3 +42,50 @@ Subject: inclusion test with other disposition
 EOF
 
 check 'include works, overriding filename' 'mmime <tmp2 | grep Disposition | grep inline'
+
+
+cat <<EOF >tmp2
+Subject: message with content-type
+Content-Type: text/plain; format=flowed
+
+This message has format-flowed.
+EOF
+
+check 'content-type is respected if found in input' 'mmime -r <tmp2 |grep format=flowed'
+
+cat <<EOF >tmp2
+Subject: message with content-transfer-encoding
+Content-Transfer-Encoding: quoted-printable
+
+This message has already encoded. f=C3=B6=C3=B6.
+EOF
+
+
+check 'content-transfer-encoding is respected if found in input' 'mmime -r <tmp2 |grep f=C3=B6=C3=B6'
+
+cat <<EOF >tmp2
+Subject: message with content-type
+Content-Type: text/plain; format=flowed
+
+This message has format-flowed.
+
+#message/rfc822 $PWD/tmp
+
+This part too.
+EOF
+
+
+check 'content-type is respected if found in input, for multipart/mixed' 'mmime <tmp2 |grep format=flowed'
+
+cat <<EOF >tmp2
+Subject: message with content-transfer-encoding
+Content-Transfer-Encoding: Quoted-Printable
+
+This message has already encoded. f=C3=B6=C3=B6.
+
+#message/rfc822 $PWD/tmp
+
+This part too.
+EOF
+
+check 'content-transfer-encoding is respected if found in input, for multipart/mixed' 'mmime <tmp2 |grep f=C3=B6=C3=B6'
-- 
cgit 1.4.1