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<?php |
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/** |
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* Util |
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* |
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* @copyright Copyright (c) Gjero Krsteski (http://krsteski.de) |
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* @license http://opensource.org/licenses/MIT MIT License |
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*/ |
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namespace Pimf\Util; |
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use Pimf\Config; |
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use Pimf\Sapi; |
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/** |
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* Manages a raw HTTP header sending. |
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* |
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* @package Util |
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* @author Gjero Krsteski <[email protected]> |
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*/ |
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class Header extends Header\ContentType |
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{ |
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/** |
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* @var string |
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*/ |
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private static $userAgent; |
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/** |
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* @var string |
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*/ |
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private static $IfModifiedSince; |
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/** |
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* @var string |
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*/ |
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private static $IfNoneMatch; |
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/** |
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* @param string $userAgent |
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* @param string $IfModifiedSince |
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* @param string $IfNoneMatch |
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*/ |
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public static function edge($userAgent, $IfModifiedSince, $IfNoneMatch) |
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{ |
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self::$userAgent = $userAgent; |
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self::$IfModifiedSince = $IfModifiedSince; |
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self::$IfNoneMatch = $IfNoneMatch; |
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} |
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/** |
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* Removes previously set headers. |
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*/ |
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public static function clear() |
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{ |
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if (headers_sent() && !error_get_last()) { |
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foreach ((array)headers_list() as $header) { |
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header_remove($header); |
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} |
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} |
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} |
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/** |
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* @param string $url |
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* @param boolean $exit |
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*/ |
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public static function toLocation($url, $exit = true) |
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{ |
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header('Location: ' . $url); |
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if ($exit) { |
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exit(1); |
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} |
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} |
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/** |
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* @param int $code |
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* @param string $status |
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* @param boolean $exit |
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*/ |
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protected static function view($code, $status, $exit = true) |
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{ |
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if (Sapi::isCli()) { |
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echo $status . PHP_EOL; |
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if ($exit) { |
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exit; |
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} |
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} |
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self::send($code, $status); |
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$appTpl = str_replace('/', DS, BASE_PATH . 'app/' . Config::get('app.name') . '/_error/' . $code . '.php'); |
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$coreTpl = str_replace('/', DS, BASE_PATH . 'pimf-framework/core/Pimf/_error/' . $code . '.php'); |
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$coreTpl = str_replace(DS . 'pimf-framework' . DS . 'pimf-framework' . DS, DS . 'pimf-framework' . DS, |
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$coreTpl); |
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if (file_exists($appTpl) && is_readable($appTpl)) { |
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include $appTpl; |
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if ($exit) { |
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exit(1); |
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} |
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} |
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include $coreTpl; |
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if ($exit) { |
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exit(1); |
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} |
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} |
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/** |
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* @param string $msg |
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* @param boolean $exit |
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*/ |
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public static function sendInternalServerError($msg = '', $exit = true) |
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{ |
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self::view(500, $msg, $exit); |
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} |
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/** |
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* @param string $msg |
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* @param boolean $exit |
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*/ |
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public static function sendNotFound($msg = '', $exit = true) |
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{ |
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self::view(404, $msg, $exit); |
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} |
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/** |
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* Handles setting pages that are always to be revalidated for freshness by any cache. |
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* |
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* @param int $last_modified Timestamp in seconds |
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*/ |
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public static function exitIfNotModifiedSince($last_modified) |
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{ |
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if (self::isModified($last_modified)) { |
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self::sendNotModified(); |
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exit(0); |
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} |
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$last_modified = gmdate('D, d M Y H:i:s', $last_modified) . ' GMT'; |
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header("Cache-Control: must-revalidate"); |
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header("Last Modified: $last_modified"); |
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} |
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/** |
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* Actual HTTP caching validation. |
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* |
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* @param int $mtime In seconds |
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* @param string $etag |
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* |
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* @return bool |
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*/ |
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public static function isModified($mtime, $etag = '') |
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{ |
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$modifiedSince = strtotime(preg_replace('/;.*$/', '', self::$IfModifiedSince)); |
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return !($modifiedSince >= $mtime || self::$IfNoneMatch == $etag); |
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} |
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/** |
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* If you want to allow a page to be cached by shared proxies for one minute. |
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* |
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* @param int $seconds Interval in seconds |
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*/ |
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public static function cacheNoValidate($seconds = 60) |
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{ |
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self::cachePage($seconds); |
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// HTTP/1.1 support |
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header("Cache-Control: public,max-age=$seconds"); |
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} |
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/** |
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* If instead you have a page that has personalization on it |
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* (say, for example, the splash page contains local news as well), |
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* you can set a copy to be cached only by the browser. |
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* |
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* @param int $seconds Interval in seconds |
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*/ |
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public static function cacheBrowser($seconds = 60) |
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{ |
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self::cachePage($seconds); |
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// HTTP/1.1 support |
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header("Cache-Control: private,max-age=$seconds,s-maxage=0"); |
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} |
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private static function cachePage($seconds) |
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{ |
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$now = time(); |
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$lmtime = gmdate('D, d M Y H:i:s', $now) . ' GMT'; |
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$extime = gmdate('D, d M Y H:i:s', $now + $seconds) . ' GMT'; |
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// backwards compatibility for HTTP/1.0 clients |
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header("Last Modified: $lmtime"); |
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header("Expires: $extime"); |
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} |
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/** |
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* If you want to try as hard as possible to keep a page from being cached anywhere. |
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*/ |
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public static function cacheNone() |
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{ |
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// backwards compatibility for HTTP/1.0 clients |
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header("Expires: 0"); |
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header("Pragma: no-cache"); |
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// HTTP/1.1 support |
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header("Cache-Control: no-cache,no-store,max-age=0,s-maxage=0,must-revalidate"); |
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} |
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/** |
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* Sends file as download-header through any firewall to the browsers like >=IE6 >=FF3.6, Safari, Chrome, Opera. |
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* |
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* @link http://reeg.junetz.de/DSP/node16.html |
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* @link http://www.php.net/manual/de/function.header.php#88038 |
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* |
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* @param string $fileOrString |
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* @param string $fileName |
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* @param boolean $exit Optional for testing |
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*/ |
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public static function sendDownloadDialog($fileOrString, $fileName, $exit = true) |
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{ |
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$disposition = (false !== strpos(self::$userAgent, 'MSIE 5.5')) ? '' : 'attachment; '; |
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header("Pragma: public"); |
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header("Expires: 0"); |
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header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); |
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header("Cache-Control: private", false); |
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header("Content-Disposition: " . $disposition . "filename=" . $fileName . ";"); |
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if (is_file($fileOrString)) { |
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readfile($fileOrString); |
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} else { |
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echo $fileOrString; |
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} |
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if ($exit) { |
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exit(0); |
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} |
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} |
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} |
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gjerokrsteski /
pimf-framework
