From: Andrew Dolgov <fox@fakecake.org>
Date: Tue, 23 Oct 2012 12:58:07 +0000 (+0400)
Subject: prevent crashes on filter regexp being too advanced for our database when testing... 
X-Git-Tag: 1.6.1~71
X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=dd8c36af4be29c311cd3d6094b083371a4794368;p=tt-rss.git

prevent crashes on filter regexp being too advanced for our database when testing filters (refs #508)
---

diff --git a/include/functions.php b/include/functions.php
index 2fb14097..5588cea8 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -2321,7 +2321,20 @@
 
 				$override_order = "updated DESC";
 
-				$filter_query_part = filter_to_sql($filter) . " AND";
+				$filter_query_part = filter_to_sql($filter);
+
+				// Try to check if SQL regexp implementation chokes on a valid regexp
+				$result = db_query($link, "SELECT true FROM ttrss_entries
+					WHERE $filter_query_part LIMIT 1", false);
+
+				$test = db_fetch_result($result, 0, "true");
+
+				if (!$test) {
+					$filter_query_part = "false AND";
+				} else {
+					$filter_query_part .= " AND";
+				}
+
 			} else {
 				$filter_query_part = "";
 			}