if (DB_TYPE == "pgsql") {
$update_limit_qpart = "AND ((
ttrss_feeds.update_interval = 0
- AND ttrss_user_prefs.value > 0
AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_user_prefs.value || ' minutes') AS INTERVAL)
) OR (
ttrss_feeds.update_interval > 0
} else {
$update_limit_qpart = "AND ((
ttrss_feeds.update_interval = 0
- AND ttrss_user_prefs.value > 0
AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL CONVERT(ttrss_user_prefs.value, SIGNED INTEGER) MINUTE)
) OR (
ttrss_feeds.update_interval > 0
$rss = false;
$rss_hash = false;
+ $cache_timestamp = file_exists($cache_filename) ? filemtime($cache_filename) : 0;
+ $last_updated_timestamp = strtotime($last_updated);
if (file_exists($cache_filename) &&
is_readable($cache_filename) &&
_debug("update_rss_feed: using local cache.");
}
- @$rss_data = file_get_contents($cache_filename);
+ if ($cache_timestamp > $last_updated_timestamp) {
+ @$rss_data = file_get_contents($cache_filename);
- if ($rss_data) {
- $rss_hash = sha1($rss_data);
- @$rss = unserialize($rss_data);
+ if ($rss_data) {
+ $rss_hash = sha1($rss_data);
+ @$rss = unserialize($rss_data);
+ }
+ } else {
+ if ($debug_enabled) {
+ _debug("update_rss_feed: local cache valid and older than last_updated, nothing to do.");
+ }
+ return;
}
}
if (!$feed_data) {
if ($debug_enabled) {
- _debug("update_rss_feed: fetching [$fetch_url]...");
+ _debug("update_rss_feed: fetching [$fetch_url] (ts: $cache_timestamp/$last_updated_timestamp)");
}
$feed_data = fetch_file_contents($fetch_url, false,
- $auth_login, $auth_pass, false, $no_cache ? 15 : 45);
+ $auth_login, $auth_pass, false, $no_cache ? 15 : 45,
+ max($last_updated_timestamp, $cache_timestamp));
if ($debug_enabled) {
_debug("update_rss_feed: fetch done.");
if (!$feed_data) {
global $fetch_last_error;
+ global $fetch_last_error_code;
if ($debug_enabled) {
- _debug("update_rss_feed: unable to fetch: $fetch_last_error");
+ _debug("update_rss_feed: unable to fetch: $fetch_last_error [$fetch_last_error_code]");
}
- $error_escaped = db_escape_string($link, $fetch_last_error);
+ $error_escaped = '';
+
+ // If-Modified-Since
+ if ($fetch_last_error_code != 304) {
+ $error_escaped = db_escape_string($link, $fetch_last_error);
+ } else {
+ if ($debug_enabled) {
+ _debug("update_rss_feed: source claims data not modified, nothing to do.");
+ }
+ }
db_query($link,
"UPDATE ttrss_feeds SET last_error = '$error_escaped',