From 40fdb172802e039ad1deff4ae61077e7645200ef Mon Sep 17 00:00:00 2001
From: Mitsukarenai <mitsu@suumitsu.eu>
Date: Mon, 30 Nov 2015 10:47:16 +0100
Subject: [PATCH] Implement basic cache purge (issue #178)

---
 index.php | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/index.php b/index.php
index 0ab85e06..03ae2ef5 100644
--- a/index.php
+++ b/index.php
@@ -23,6 +23,22 @@ if (!extension_loaded('openssl'))
 ini_set('user_agent', 'Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20121202 Firefox/30.0 (rss-bridge/0.1; +https://github.com/sebsauvage/rss-bridge)');
 // -------
 
+// cache file purge - delete cache files older than 24 hours
+$cacheTimeLimit = time() - 60*60*24 ;
+$cachePath = 'cache';
+$cacheIterator = new RecursiveIteratorIterator(
+  new RecursiveDirectoryIterator($cachePath),
+  RecursiveIteratorIterator::CHILD_FIRST
+);
+foreach ($cacheIterator as $cacheFile) {
+   if (in_array($cacheFile->getBasename(), array('.', '..')))
+      continue;
+   elseif ($cacheFile->isFile()) {
+      if( filemtime($cacheFile->getPathname()) < $cacheTimeLimit )
+         unlink( $cacheFile->getPathname() );
+      }
+}
+
 // default whitelist
 $whitelist_file = './whitelist.txt';
 $whitelist_default = array(