Initial Import
diff --git a/system/libraries/Output.php b/system/libraries/Output.php
new file mode 100644
index 0000000..f5db3e0
--- /dev/null
+++ b/system/libraries/Output.php
@@ -0,0 +1,241 @@
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * Code Igniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package CodeIgniter
+ * @author Rick Ellis
+ * @copyright Copyright (c) 2006, pMachine, Inc.
+ * @license http://www.codeignitor.com/user_guide/license.html
+ * @link http://www.codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Output Class
+ *
+ * Responsible for sending final output to browser
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @category Output
+ * @author Rick Ellis
+ * @link http://www.codeigniter.com/user_guide/libraries/output.html
+ */
+class CI_Output {
+
+ var $final_output;
+ var $cache_expiration = 0;
+
+ 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 = $output;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set Cache
+ *
+ * @access public
+ * @param integer
+ * @return void
+ */
+ function cache($time)
+ {
+ $this->cache_expiration = ( ! ctype_digit($time)) ? 0 : $time;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Display Output
+ *
+ * All "view" data is automatically put into this variable
+ * by the controller class:
+ *
+ * $this->final_output
+ *
+ * This function simply echos the variable out. It also does the following:
+ *
+ * Stops the benchmark timer so the page rendering speed can be shown.
+ *
+ * Determines if the "memory_get_usage' function is available so that
+ * the memory usage can be shown.
+ *
+ * @access public
+ * @return void
+ */
+ function _display($output = '')
+ {
+ $BM =& _load_class('CI_Benchmark');
+
+ if ($output == '')
+ {
+ $output =& $this->final_output;
+ }
+
+ if ($this->cache_expiration > 0)
+ {
+ $this->_write_cache($output);
+ }
+
+ $elapsed = $BM->elapsed_time('code_igniter_start', 'code_igniter_end');
+ $memory = ( ! function_exists('memory_get_usage')) ? '0' : round(memory_get_usage()/1024/1024, 2).'MB';
+
+ $output = str_replace('{memory_usage}', $memory, $output);
+ $output = str_replace('{elapsed_time}', $elapsed, $output);
+
+ echo $output;
+
+ log_message('debug', "Final output sent to browser");
+ log_message('debug', "Total execution time: ".$elapsed);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Write a Cache File
+ *
+ * @access public
+ * @return void
+ */
+ function _write_cache($output)
+ {
+ $obj =& get_instance();
+ $path = $obj->config->item('cache_path');
+
+ $cache_path = ($path == '') ? BASEPATH.'cache/' : $path;
+
+ if ( ! is_dir($cache_path) OR ! is_writable($cache_path))
+ {
+ return;
+ }
+
+ $uri = $obj->config->item('base_url', 1).
+ $obj->config->item('index_page').
+ $obj->uri->uri_string();
+
+ $cache_path .= md5($uri);
+
+ if ( ! $fp = @fopen($cache_path, 'wb'))
+ {
+ log_message('error', "Unable to write ache file: ".$cache_path);
+ return;
+ }
+
+ $expire = time() + ($this->cache_expiration * 60);
+
+ flock($fp, LOCK_EX);
+ fwrite($fp, $expire.'TS--->'.$output);
+ flock($fp, LOCK_UN);
+ fclose($fp);
+ @chmod($cache_path, 0777);
+
+ log_message('debug', "Cache file written: ".$cache_path);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update/serve a cached file
+ *
+ * @access public
+ * @return void
+ */
+ function _display_cache()
+ {
+ $CFG =& _load_class('CI_Config');
+ $RTR =& _load_class('CI_Router');
+
+ $cache_path = ($CFG->item('cache_path') == '') ? BASEPATH.'cache/' : $CFG->item('cache_path');
+
+ if ( ! is_dir($cache_path) OR ! is_writable($cache_path))
+ {
+ return FALSE;
+ }
+
+ // Build the file path. The file name is an MD5 hash of the full URI
+ $uri = $CFG->item('base_url', 1).$CFG->item('index_page').$RTR->uri_string;
+
+ $filepath = $cache_path.md5($uri);
+
+ if ( ! @file_exists($filepath))
+ {
+ return FALSE;
+ }
+
+ if ( ! $fp = @fopen($filepath, 'rb'))
+ {
+ 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
+?>
\ No newline at end of file