From a04a168b253b7aed5dc6023224e88904ae86deff Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Wed, 9 Dec 2020 10:38:56 +0100
Subject: [PATCH] mail: support invalid and repeated requests

Fix random sitemap pages.
---
 mail/index.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mail/index.php b/mail/index.php
index 908e531..2b6e600 100644
--- a/mail/index.php
+++ b/mail/index.php
@@ -2,6 +2,7 @@
 $mailbox = 'mail/inbox';
 @list ($msgid) = explode('/', ltrim($Page->path, '/'));
 
+if (!function_exists('parsemailhead')) {
 function parsemailhead($headerdata)
 {
 	$headlist = iconv_mime_decode_headers($headerdata, ICONV_MIME_DECODE_CONTINUE_ON_ERROR);
@@ -12,9 +13,14 @@ function parsemailhead($headerdata)
 	});
 	return $headlist;
 }
+}
 
 if ($msgid) {
 	$filename = "$mailbox/$msgid";
+	if (!is_readable($filename)) {
+		return TRUE;
+	}
+
 	list ($headerdata, $rawbody) = explode("\n\n", file_get_contents($filename), 2);
 	$head = parsemailhead($headerdata);
 	$head['date']->setTimezone(new DateTimeZone(date_default_timezone_get()));
-- 
2.30.0