/**
* Redirect 304 Not Modified
*
* @param string $timestamp
* @return bool false (not attempted)
*/
function nc_attempt_last_modified_redirect($timestamp)
{
// system superior object
$nc_core = nc_Core::get_object();
// format timestamp as GMT date
$last_modified = nc_timestamp_to_gmt($timestamp);
// get apache headers
$request_headers = apache_request_headers();
// check headers
foreach ($request_headers as $key => $value) {
if (nc_preg_match("/^If-Modified-Since\$/is", $key)) {
if ($value && strtotime($value) >= strtotime($last_modified)) {
if ($nc_core->PHP_TYPE != "cgi") {
header($_SERVER['SERVER_PROTOCOL'] . " 304 Not Modified");
} else {
header("Status: 304 Not Modified");
}
exit;
}
}
}
// not attempted
return false;
}
$file_path = $matches[1] . "/" . $matches[2];
} else {
$file_path = $matches[1] . "/";
}
$full_file_path = $nc_core->FILES_FOLDER . $file_path . $matches[3];
if (file_exists($full_file_path)) {
while (ob_get_level() && @ob_end_clean()) {
}
// sic (remove header)
if ($use_gzip_compression) {
header("Content-Encoding: ");
}
// get filetime
$file_time = filemtime($full_file_path);
// format timestamp as GMT date
$last_modified = nc_timestamp_to_gmt($file_time);
// check If-Modified-Since and REDIRECT 304, if needed
nc_attempt_last_modified_redirect($file_time);
$file_data = $db->get_row("SELECT f.`ID`, f.`Real_Name`, f.`File_Type`, f.`Content_Disposition`, fl.`Format`\n \t\t FROM `Filetable` as f, `Field` as `fl`\n \t\t WHERE `Virt_Name` = '" . $matches[3] . "'\n AND `File_Path` = '/" . $file_path . "'\n AND fl.`Field_ID` = f.`Field_ID`\n LIMIT 1", ARRAY_N);
if (!empty($file_data)) {
list($file_id, $real_name, $file_type, $attachment, $format) = $file_data;
$file_size = @filesize($full_file_path);
if (!nc_strlen($file_type)) {
$file_type = "application/octet-stream";
}
header($_SERVER['SERVER_PROTOCOL'] . " 200 OK");
if ($nc_core->PHP_TYPE == "cgi") {
header("Status: 200 OK");
}
header("Last-Modified: " . $last_modified);
header("Content-type: " . $file_type);
/**
* Метод посылает заголовок Last-Modified для текущего раздела
* В зависимости от ncLastModifiedType заголовок может не посылаться,
* посылаться текущее время или акутальное
* Для титульной страницы посылается текущее время
*/
public function send_lastmodified()
{
$current_sub = $this->core->subdivision->get_current();
$title_sub_id = $this->core->catalogue->get_current('Title_Sub_ID');
$lm = $this->get_field_name('last_modified');
$lm_type = $this->get_field_name('last_modified_type');
if ($current_sub[$lm_type] <= NC_LASTMODIFIED_NONE) {
return 0;
}
$last_mod = false;
if ($current_sub[$lm_type] == NC_LASTMODIFIED_CURRENT || $current_sub['Subdivision_ID'] == $title_sub_id) {
$last_mod = time();
} else {
if ($current_sub[$lm_type] == NC_LASTMODIFIED_YESTERDAY) {
$last_mod = time() - 86400;
} else {
if ($current_sub[$lm_type] == NC_LASTMODIFIED_HOUR) {
$last_mod = time() - 3600;
} else {
if ($current_sub[$lm_type] == NC_LASTMODIFIED_ACTUAL && $current_sub[$lm]) {
$last_mod = strtotime($current_sub[$lm]);
}
}
}
}
if ($last_mod) {
header("Last-Modified: " . nc_timestamp_to_gmt($last_mod));
}
}