From 7c6f220e95feb3bc79f48aca16b5ca691a561d97 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Sun, 21 Jul 2019 21:40:37 +0530
Subject: email: Decode MIME encoded words in Subject header.

Prior to this, MIME encoded words in the Subject header were not
decoded.

* email/email.scm (parse-email-headers): Decode MIME encoded words in
Subject header.
* tests/email.scm ("decode MIME encoded words in Subject header"): New
test.

Reported-by: Ricardo Wurmus <rekado@elephly.net>
---
 email/email.scm | 2 ++
 tests/email.scm | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/email/email.scm b/email/email.scm
index 20bf291..752c941 100644
--- a/email/email.scm
+++ b/email/email.scm
@@ -812,6 +812,8 @@ list of header keys and values."
      (content . ,post-process-content-type)
      (encoding . ,post-process-content-transfer-encoding)
      (disposition . ,post-process-content-disposition)
+     (subject . ,(match-lambda* (`(subject ,subject)
+                                 `(subject ,(decode-mime-encoded-word subject)))))
      (fields . ,(lambda (_ . fields)
                   (add-default-headers
                    (filter-map (match-lambda
diff --git a/tests/email.scm b/tests/email.scm
index fb2c45b..ab2a408 100644
--- a/tests/email.scm
+++ b/tests/email.scm
@@ -144,4 +144,13 @@ foo
    "=?iso-8859-1?Q?=A1Hola,_se=F1or!?= =?UTF-8?Q?B=C3=A3r?=")
   "¡Hola, señor! Bãr")
 
+(test-equal "decode MIME encoded words in Subject header"
+  (parse-email-headers "Subject: Foo =?UTF-8?Q?B=C3=A3r?=
+")
+  `((content-type (type . text)
+                  (subtype . plain)
+                  (charset . "utf-8"))
+    (content-transfer-encoding . 7bit)
+    (subject . "Foo Bãr")))
+
 (test-end "email")
-- 
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