diff options
Diffstat (limited to 'hugo/libraries/OutputBuffering.class.php')
| -rw-r--r-- | hugo/libraries/OutputBuffering.class.php | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/hugo/libraries/OutputBuffering.class.php b/hugo/libraries/OutputBuffering.class.php new file mode 100644 index 0000000..1ef7643 --- /dev/null +++ b/hugo/libraries/OutputBuffering.class.php @@ -0,0 +1,148 @@ +<?php +/* vim: set expandtab sw=4 ts=4 sts=4: */ +/** + * Output buffering wrapper + * + * @package PhpMyAdmin + */ +if (! defined('PHPMYADMIN')) { + exit; +} + +/** + * Output buffering wrapper class + * + * @package PhpMyAdmin + */ +class PMA_OutputBuffering +{ + private static $_instance; + private $_mode; + private $_content; + private $_on; + + /** + * Initializes class + * + * @return void + */ + private function __construct() + { + $this->_mode = $this->_getMode(); + $this->_on = false; + } + + /** + * This function could be used eventually to support more modes. + * + * @return integer the output buffer mode + */ + private function _getMode() + { + $mode = 0; + if ($GLOBALS['cfg']['OBGzip'] && function_exists('ob_start')) { + if (ini_get('output_handler') == 'ob_gzhandler') { + // If a user sets the output_handler in php.ini to ob_gzhandler, then + // any right frame file in phpMyAdmin will not be handled properly by + // the browser. My fix was to check the ini file within the + // PMA_outBufferModeGet() function. + $mode = 0; + } elseif (function_exists('ob_get_level') && ob_get_level() > 0) { + // If output buffering is enabled in php.ini it's not possible to + // add the ob_gzhandler without a warning message from php 4.3.0. + // Being better safe than sorry, check for any existing output handler + // instead of just checking the 'output_buffering' setting. + $mode = 0; + } else { + $mode = 1; + } + } + // Zero (0) is no mode or in other words output buffering is OFF. + // Follow 2^0, 2^1, 2^2, 2^3 type values for the modes. + // Usefull if we ever decide to combine modes. Then a bitmask field of + // the sum of all modes will be the natural choice. + return $mode; + } + + /** + * Returns the singleton PMA_OutputBuffering object + * + * @return PMA_OutputBuffering object + */ + public static function getInstance() + { + if (empty(self::$_instance)) { + self::$_instance = new PMA_OutputBuffering(); + } + return self::$_instance; + } + + /** + * This function will need to run at the top of all pages if output + * output buffering is turned on. It also needs to be passed $mode from + * the PMA_outBufferModeGet() function or it will be useless. + * + * @return void + */ + public function start() + { + if (! $this->_on) { + if ($this->_mode) { + ob_start('ob_gzhandler'); + } + ob_start(); + if (! defined('TESTSUITE')) { + header('X-ob_mode: ' . $this->_mode); + } + register_shutdown_function('PMA_OutputBuffering::stop'); + $this->_on = true; + } + } + + /** + * This function will need to run at the bottom of all pages if output + * buffering is turned on. It also needs to be passed $mode from the + * PMA_outBufferModeGet() function or it will be useless. + * + * @return void + */ + public static function stop() + { + $buffer = PMA_OutputBuffering::getInstance(); + if ($buffer->_on) { + $buffer->_on = false; + $buffer->_content = ob_get_contents(); + ob_end_clean(); + } + PMA_Response::response(); + } + + /** + * Gets buffer content + * + * @return buffer content + */ + public function getContents() + { + return $this->_content; + } + + /** + * Flushes output buffer + * + * @return void + */ + public function flush() + { + if (ob_get_status() && $this->_mode) { + ob_flush(); + } + /** + * previously we had here an "else flush()" but some PHP versions + * (at least PHP 5.2.11) have a bug (49816) that produces garbled + * data + */ + } +} + +?> |