/**
* Sends and handles a lastmod header.
*
* @param int|null $unix_ts The last modification date as a UNIX timestamp
* @param bool $exit If TRUE, terminates the script
* @return array|null Array of sent HTTP status and the lastmod header, or NULL
* @package Pref
*/
function handle_lastmod($unix_ts = null, $exit = true)
{
if (get_pref('send_lastmod') && get_pref('production_status') == 'live') {
$unix_ts = get_lastmod($unix_ts);
// Make sure lastmod isn't in the future.
$unix_ts = min($unix_ts, time());
// Or too far in the past (7 days).
$unix_ts = max($unix_ts, time() - 3600 * 24 * 7);
$last = safe_strftime('rfc822', $unix_ts, 1);
header("Last-Modified: {$last}");
header('Cache-Control: no-cache');
$hims = serverSet('HTTP_IF_MODIFIED_SINCE');
if ($hims and @strtotime($hims) >= $unix_ts) {
log_hit('304');
if (!$exit) {
return array('304', $last);
}
txp_status_header('304 Not Modified');
// Some mod_deflate versions have a bug that breaks subsequent
// requests when keepalive is used. dropping the connection
// is the only reliable way to fix this.
if (!get_pref('lastmod_keepalive')) {
header('Connection: close');
}
header('Content-Length: 0');
// Discard all output.
while (@ob_end_clean()) {
}
exit;
}
if (!$exit) {
return array('200', $last);
}
}
}
function handle_lastmod($unix_ts = NULL, $exit = 1)
{
global $prefs;
extract($prefs);
if ($send_lastmod and $production_status == 'live') {
$unix_ts = get_lastmod($unix_ts);
# make sure lastmod isn't in the future
$unix_ts = min($unix_ts, time());
# or too far in the past (7 days)
$unix_ts = max($unix_ts, time() - 3600 * 24 * 7);
$last = safe_strftime('rfc822', $unix_ts, 1);
header("Last-Modified: {$last}");
header('Cache-Control: no-cache');
$hims = serverset('HTTP_IF_MODIFIED_SINCE');
if ($hims and @strtotime($hims) >= $unix_ts) {
log_hit('304');
if (!$exit) {
return array('304', $last);
}
txp_status_header('304 Not Modified');
# some mod_deflate versions have a bug that breaks subsequent
# requests when keepalive is used. dropping the connection
# is the only reliable way to fix this.
if (empty($lastmod_keepalive)) {
header('Connection: close');
}
header('Content-Length: 0');
# discard all output
while (@ob_end_clean()) {
}
exit;
}
if (!$exit) {
return array('200', $last);
}
}
}
function handle_lastmod($unix_ts = NULL, $exit = 1)
{
global $prefs;
extract($prefs);
if ($send_lastmod and $production_status == 'live') {
$unix_ts = get_lastmod($unix_ts);
# make sure lastmod isn't in the future
$unix_ts = min($unix_ts, time());
# or too far in the past (7 days)
$unix_ts = max($unix_ts, time() - 3600 * 24 * 7);
$last = safe_strftime('rfc822', $unix_ts, 1);
header("Last-Modified: {$last}");
header('Cache-Control: no-cache');
$hims = serverset('HTTP_IF_MODIFIED_SINCE');
if ($hims and @strtotime($hims) >= $unix_ts) {
log_hit('304');
if (!$exit) {
return array('304', $last);
}
txp_status_header('304 Not Modified');
# header('Connection: close');
header('Content-Length: 0');
# discard all output
while (@ob_end_clean()) {
}
exit;
}
if (!$exit) {
return array('200', $last);
}
}
}