From 1cab7bc74f3052de570603935692d4c2e2cf6a1d Mon Sep 17 00:00:00 2001
From: 8chan <admin@8chan.co>
Date: Sun, 14 Dec 2014 03:28:38 -0800
Subject: [PATCH] Prevent one type of blank-posting

---
 post.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/post.php b/post.php
index 37092bba..d28f50d6 100644
--- a/post.php
+++ b/post.php
@@ -394,7 +394,8 @@ elseif (isset($_POST['post'])) {
 	$post['has_file'] = (!isset($post['embed']) && (($post['op'] && !isset($post['no_longer_require_an_image_for_op']) && $config['force_image_op']) || !empty($_FILES['file']['name'])));
 	
 	if (!($post['has_file'] || isset($post['embed'])) || (($post['op'] && $config['force_body_op']) || (!$post['op'] && $config['force_body']))) {
-		$stripped_whitespace = preg_replace('/[\s]/u', '', $post['body']);
+		// http://stackoverflow.com/a/4167053
+		$stripped_whitespace = preg_replace('/^[\pZ\pC]+|[\pZ\pC]+$/u', '', $post['body']);
 		if ($stripped_whitespace == '') {
 			error($config['error']['tooshort_body']);
 		}