diff options
Diffstat (limited to 'include/rssfuncs.php')
| -rw-r--r-- | include/rssfuncs.php | 81 |
1 files changed, 71 insertions, 10 deletions
diff --git a/include/rssfuncs.php b/include/rssfuncs.php index 0fc462c48..821d6b175 100644 --- a/include/rssfuncs.php +++ b/include/rssfuncs.php @@ -136,6 +136,8 @@ WHERE id IN (%s)", implode(',', $feed_ids))); } + expire_cached_files($debug); + // For each feed, we call the feed update function. while ($line = array_pop($feeds_to_update)) { @@ -364,15 +366,6 @@ $rss->set_output_encoding('UTF-8'); $rss->force_feed(true); - if (SIMPLEPIE_CACHE_IMAGES && $cache_images) { - - if ($debug_enabled) { - _debug("enabling image cache"); - } - - $rss->set_image_handler("image.php", 'i'); - } - if ($debug_enabled) { _debug("feed update interval (sec): " . get_feed_update_interval($link, $feed)*60); @@ -685,9 +678,13 @@ } } + if ($cache_images) + $entry_content = cache_images($entry_content, $site_url, $debug_enabled); + if ($_REQUEST["xdebug"] == 2) { print "update_rss_feed: content: "; print_r(htmlspecialchars($entry_content)); + print "\n"; } $entry_content_unescaped = $entry_content; @@ -735,7 +732,7 @@ $entry_content = db_escape_string($entry_content, false); - $content_hash = "SHA1:" . sha1(strip_tags($entry_content)); + $content_hash = "SHA1:x" . sha1(strip_tags($entry_content)); $entry_title = db_escape_string($entry_title); $entry_link = db_escape_string($entry_link); @@ -1311,7 +1308,71 @@ } + function cache_images($html, $site_url, $debug) { + $cache_dir = CACHE_DIR . "/images"; + + libxml_use_internal_errors(true); + + $charset_hack = '<head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> + </head>'; + + $doc = new DOMDocument(); + $doc->loadHTML($charset_hack . $html); + $xpath = new DOMXPath($doc); + + $entries = $xpath->query('(//img[@src])'); + + foreach ($entries as $entry) { + if ($entry->hasAttribute('src')) { + $src = rewrite_relative_url($site_url, $entry->getAttribute('src')); + + $local_filename = CACHE_DIR . "/images/" . sha1($src) . ".png"; + + if ($debug) _debug("cache_images: downloading: $src to $local_filename"); + + if (!file_exists($local_filename)) { + $file_content = fetch_file_contents($src); + + if ($file_content) { + file_put_contents($local_filename, $file_content); + } + } + + if (file_exists($local_filename)) { + $entry->setAttribute('src', SELF_URL_PATH . '/image.php?url=' . + htmlspecialchars($src)); + } + } + } + + $node = $doc->getElementsByTagName('body')->item(0); + + return $doc->saveXML($node); + } + + function expire_cached_files($debug) { + foreach (array("magpie", "simplepie", "images") as $dir) { + $cache_dir = CACHE_DIR . "/$dir"; + if ($debug) _debug("Expiring $cache_dir"); + $num_deleted = 0; + + if (is_writable($cache_dir)) { + $files = glob("$cache_dir/*"); + + foreach ($files as $file) { + if (time() - filemtime($file) > 86400*7) { + unlink($file); + + ++$num_deleted; + } + } + } + + if ($debug) _debug("Removed $num_deleted files."); + } + } ?> |