Alexander Nicolaysen Sørnes : Guard against intensive searches

[Chris Morgan]

Module: appdb
Branch: master
Commit: 7be5d6bd34d5c9c2f78df084e8d824b111925dcb
URL:    http://source.winehq.org/git/appdb.git/?a=commit;h=7be5d6bd34d5c9c2f78df084e...

Author: Alexander Nicolaysen Sørnes 
Date:   Thu Jul 10 01:03:26 2008 +0200

Guard against intensive searches

---

include/util.php |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/include/util.php b/include/util.php
index 6fe6c1c..3b6453d 100644
--- a/include/util.php
+++ b/include/util.php
@@ -427,7 +427,16 @@ function cleanupSearchWords($search_words)
    Search for the first word in the search query */
 function searchForApplicationPartial($sSearchWords)
 {
+    /* This would yield too many results and stress MySQL */
+    if(strlen($sSearchWords) < 4)
+        return null;
+
     $sSearchWords = cleanupSearchWords($sSearchWords);
+
+    /* The search string may have gotten shorter; even empty */
+    if(strlen($sSearchWords) < 4)
+        return null;
+
     $aWords = explode(' ', $sSearchWords);
     $sSearchString = '';
     $sEnsureExactWord = ''; // Used to ensure we don't match partial words when prepending
@@ -455,9 +464,17 @@ function searchForApplicationPartial($sSearchWords)
 /* search the database and return a hResult from the query_appdb() */
 function searchForApplication($search_words)
 {
+    /* This would yield too many results and stress MySQL */
+    if(strlen($search_words) < 4)
+        return null;
+
     /* cleanup search words */
     $search_words = cleanupSearchWords($search_words);

+    /* The search string may have gotten shorter; even empty */
+    if(strlen($search_words) < 4)
+        return null;
+
     /* remove any search words less than 4 letters */
     $split_words = array();
     $split_search_words = split(" ", $search_words);