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-rw-r--r--system/libraries/Output.php409
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diff --git a/system/libraries/Output.php b/system/libraries/Output.php
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--- a/system/libraries/Output.php
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-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 4.3.2 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2010, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
-
-// ------------------------------------------------------------------------
-
-/**
- * Output Class
- *
- * Responsible for sending final output to browser
- *
- * @package CodeIgniter
- * @subpackage Libraries
- * @category Output
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/libraries/output.html
- */
-class CI_Output {
-
- var $final_output;
- var $cache_expiration = 0;
- var $headers = array();
- var $enable_profiler = FALSE;
-
-
- function CI_Output()
- {
- log_message('debug', "Output Class Initialized");
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Get Output
- *
- * Returns the current output string
- *
- * @access public
- * @return string
- */
- function get_output()
- {
- return $this->final_output;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Output
- *
- * Sets the output string
- *
- * @access public
- * @param string
- * @return void
- */
- function set_output($output)
- {
- $this->final_output = $output;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Append Output
- *
- * Appends data onto the output string
- *
- * @access public
- * @param string
- * @return void
- */
- function append_output($output)
- {
- if ($this->final_output == '')
- {
- $this->final_output = $output;
- }
- else
- {
- $this->final_output .= $output;
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Header
- *
- * Lets you set a server header which will be outputted with the final display.
- *
- * Note: If a file is cached, headers will not be sent. We need to figure out
- * how to permit header data to be saved with the cache data...
- *
- * @access public
- * @param string
- * @return void
- */
- function set_header($header, $replace = TRUE)
- {
- $this->headers[] = array($header, $replace);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set HTTP Status Header
- * moved to Common procedural functions in 1.7.2
- *
- * @access public
- * @param int the status code
- * @param string
- * @return void
- */
- function set_status_header($code = '200', $text = '')
- {
- set_status_header($code, $text);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Enable/disable Profiler
- *
- * @access public
- * @param bool
- * @return void
- */
- function enable_profiler($val = TRUE)
- {
- $this->enable_profiler = (is_bool($val)) ? $val : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Cache
- *
- * @access public
- * @param integer
- * @return void
- */
- function cache($time)
- {
- $this->cache_expiration = ( ! is_numeric($time)) ? 0 : $time;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Display Output
- *
- * All "view" data is automatically put into this variable by the controller class:
- *
- * $this->final_output
- *
- * This function sends the finalized output data to the browser along
- * with any server headers and profile data. It also stops the
- * benchmark timer so the page rendering speed and memory usage can be shown.
- *
- * @access public
- * @return mixed
- */
- function _display($output = '')
- {
- // Note: We use globals because we can't use $CI =& get_instance()
- // since this function is sometimes called by the caching mechanism,
- // which happens before the CI super object is available.
- global $BM, $CFG;
-
- // --------------------------------------------------------------------
-
- // Set the output data
- if ($output == '')
- {
- $output =& $this->final_output;
- }
-
- // --------------------------------------------------------------------
-
- // Do we need to write a cache file?
- if ($this->cache_expiration > 0)
- {
- $this->_write_cache($output);
- }
-
- // --------------------------------------------------------------------
-
- // Parse out the elapsed time and memory usage,
- // then swap the pseudo-variables with the data
-
- $elapsed = $BM->elapsed_time('total_execution_time_start', 'total_execution_time_end');
- $output = str_replace('{elapsed_time}', $elapsed, $output);
-
- $memory = ( ! function_exists('memory_get_usage')) ? '0' : round(memory_get_usage()/1024/1024, 2).'MB';
- $output = str_replace('{memory_usage}', $memory, $output);
-
- // --------------------------------------------------------------------
-
- // Is compression requested?
- if ($CFG->item('compress_output') === TRUE)
- {
- if (extension_loaded('zlib'))
- {
- if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) AND strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE)
- {
- ob_start('ob_gzhandler');
- }
- }
- }
-
- // --------------------------------------------------------------------
-
- // Are there any server headers to send?
- if (count($this->headers) > 0)
- {
- foreach ($this->headers as $header)
- {
- @header($header[0], $header[1]);
- }
- }
-
- // --------------------------------------------------------------------
-
- // Does the get_instance() function exist?
- // If not we know we are dealing with a cache file so we'll
- // simply echo out the data and exit.
- if ( ! function_exists('get_instance'))
- {
- echo $output;
- log_message('debug', "Final output sent to browser");
- log_message('debug', "Total execution time: ".$elapsed);
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- // Grab the super object. We'll need it in a moment...
- $CI =& get_instance();
-
- // Do we need to generate profile data?
- // If so, load the Profile class and run it.
- if ($this->enable_profiler == TRUE)
- {
- $CI->load->library('profiler');
-
- // If the output data contains closing </body> and </html> tags
- // we will remove them and add them back after we insert the profile data
- if (preg_match("|</body>.*?</html>|is", $output))
- {
- $output = preg_replace("|</body>.*?</html>|is", '', $output);
- $output .= $CI->profiler->run();
- $output .= '</body></html>';
- }
- else
- {
- $output .= $CI->profiler->run();
- }
- }
-
- // --------------------------------------------------------------------
-
- // Does the controller contain a function named _output()?
- // If so send the output there. Otherwise, echo it.
- if (method_exists($CI, '_output'))
- {
- $CI->_output($output);
- }
- else
- {
- echo $output; // Send it to the browser!
- }
-
- log_message('debug', "Final output sent to browser");
- log_message('debug', "Total execution time: ".$elapsed);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Write a Cache File
- *
- * @access public
- * @return void
- */
- function _write_cache($output)
- {
- $CI =& get_instance();
- $path = $CI->config->item('cache_path');
-
- $cache_path = ($path == '') ? BASEPATH.'cache/' : $path;
-
- if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
- {
- return;
- }
-
- $uri = $CI->config->item('base_url').
- $CI->config->item('index_page').
- $CI->uri->uri_string();
-
- $cache_path .= md5($uri);
-
- if ( ! $fp = @fopen($cache_path, FOPEN_WRITE_CREATE_DESTRUCTIVE))
- {
- log_message('error', "Unable to write cache file: ".$cache_path);
- return;
- }
-
- $expire = time() + ($this->cache_expiration * 60);
-
- if (flock($fp, LOCK_EX))
- {
- fwrite($fp, $expire.'TS--->'.$output);
- flock($fp, LOCK_UN);
- }
- else
- {
- log_message('error', "Unable to secure a file lock for file at: ".$cache_path);
- return;
- }
- fclose($fp);
- @chmod($cache_path, FILE_WRITE_MODE);
-
- log_message('debug', "Cache file written: ".$cache_path);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Update/serve a cached file
- *
- * @access public
- * @return void
- */
- function _display_cache(&$CFG, &$URI)
- {
- $cache_path = ($CFG->item('cache_path') == '') ? BASEPATH.'cache/' : $CFG->item('cache_path');
-
- if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
- {
- return FALSE;
- }
-
- // Build the file path. The file name is an MD5 hash of the full URI
- $uri = $CFG->item('base_url').
- $CFG->item('index_page').
- $URI->uri_string;
-
- $filepath = $cache_path.md5($uri);
-
- if ( ! @file_exists($filepath))
- {
- return FALSE;
- }
-
- if ( ! $fp = @fopen($filepath, FOPEN_READ))
- {
- return FALSE;
- }
-
- flock($fp, LOCK_SH);
-
- $cache = '';
- if (filesize($filepath) > 0)
- {
- $cache = fread($fp, filesize($filepath));
- }
-
- flock($fp, LOCK_UN);
- fclose($fp);
-
- // Strip out the embedded timestamp
- if ( ! preg_match("/(\d+TS--->)/", $cache, $match))
- {
- return FALSE;
- }
-
- // Has the file expired? If so we'll delete it.
- if (time() >= trim(str_replace('TS--->', '', $match['1'])))
- {
- @unlink($filepath);
- log_message('debug', "Cache file has expired. File deleted");
- return FALSE;
- }
-
- // Display the cache
- $this->_display(str_replace($match['0'], '', $cache));
- log_message('debug', "Cache file is current. Sending it to browser.");
- return TRUE;
- }
-
-
-}
-// END Output Class
-
-/* End of file Output.php */
-/* Location: ./system/libraries/Output.php */ \ No newline at end of file
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