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-rw-r--r--system/core/Output.php161
1 files changed, 83 insertions, 78 deletions
diff --git a/system/core/Output.php b/system/core/Output.php
index 7d3e2e180..04e452d2c 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -30,8 +30,8 @@ class CI_Output {
var $final_output;
var $cache_expiration = 0;
- var $headers = array();
- var $enable_profiler = FALSE;
+ var $headers = array();
+ var $enable_profiler = FALSE;
var $parse_exec_vars = TRUE; // whether or not to parse variables like {elapsed_time} and {memory_usage}
var $_zlib_oc = FALSE;
@@ -40,12 +40,12 @@ class CI_Output {
function CI_Output()
{
$this->_zlib_oc = @ini_get('zlib.output_compression');
-
+
log_message('debug', "Output Class Initialized");
}
-
+
// --------------------------------------------------------------------
-
+
/**
* Get Output
*
@@ -53,14 +53,14 @@ class CI_Output {
*
* @access public
* @return string
- */
+ */
function get_output()
{
return $this->final_output;
}
-
+
// --------------------------------------------------------------------
-
+
/**
* Set Output
*
@@ -69,7 +69,7 @@ class CI_Output {
* @access public
* @param string
* @return void
- */
+ */
function set_output($output)
{
$this->final_output = $output;
@@ -85,7 +85,7 @@ class CI_Output {
* @access public
* @param string
* @return void
- */
+ */
function append_output($output)
{
if ($this->final_output == '')
@@ -111,52 +111,52 @@ class CI_Output {
* @access public
* @param string
* @return void
- */
+ */
function set_header($header, $replace = TRUE)
{
// If zlib.output_compression is enabled it will compress the output,
// but it will not modify the content-length header to compensate for
// the reduction, causing the browser to hang waiting for more data.
// We'll just skip content-length in those cases.
-
+
if ($this->_zlib_oc && strncasecmp($header, 'content-length', 14) == 0)
{
return;
}
-
+
$this->headers[] = array($header, $replace);
}
// --------------------------------------------------------------------
-
+
/**
* Set HTTP Status Header
* moved to Common procedural functions in 1.7.2
- *
+ *
* @access public
- * @param int the status code
- * @param string
+ * @param int the status code
+ * @param string
* @return void
- */
+ */
function set_status_header($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)) ? $val : TRUE;
}
-
+
// --------------------------------------------------------------------
/**
@@ -177,21 +177,21 @@ class CI_Output {
}
// --------------------------------------------------------------------
-
+
/**
* Set Cache
*
* @access public
* @param integer
* @return void
- */
+ */
function cache($time)
{
$this->cache_expiration = ( ! is_numeric($time)) ? 0 : $time;
}
-
+
// --------------------------------------------------------------------
-
+
/**
* Display Output
*
@@ -205,47 +205,55 @@ class CI_Output {
*
* @access public
* @return mixed
- */
+ */
function _display($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;
-
+
+ // Grab the super object if we can.
+ if (function_exists('get_instance'))
+ {
+ $CI =& get_instance();
+ }
+
// --------------------------------------------------------------------
-
+
// Set the output data
if ($output == '')
{
$output =& $this->final_output;
}
-
+
// --------------------------------------------------------------------
-
- // Do we need to write a cache file?
- if ($this->cache_expiration > 0)
+
+ // Do we need to write a cache file? Only if the controller does not have its
+ // own _output() method and we are not dealing with a cache file, which we
+ // can determine by the existence of the $CI object above
+ if ($this->cache_expiration > 0 && isset($CI) && ! method_exists($CI, '_output'))
{
$this->_write_cache($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');
+
+ $elapsed = $BM->elapsed_time('total_execution_time_start', 'total_execution_time_end');
if ($this->parse_exec_vars === TRUE)
{
$memory = ( ! function_exists('memory_get_usage')) ? '0' : round(memory_get_usage()/1024/1024, 2).'MB';
-
+
$output = str_replace('{elapsed_time}', $elapsed, $output);
$output = str_replace('{memory_usage}', $memory, $output);
}
// --------------------------------------------------------------------
-
+
// Is compression requested?
if ($CFG->item('compress_output') === TRUE && $this->_zlib_oc == FALSE)
{
@@ -259,7 +267,7 @@ class CI_Output {
}
// --------------------------------------------------------------------
-
+
// Are there any server headers to send?
if (count($this->headers) > 0)
{
@@ -267,36 +275,33 @@ class CI_Output {
{
@header($header[0], $header[1]);
}
- }
+ }
// --------------------------------------------------------------------
-
- // Does the get_instance() function exist?
+
+ // Does the $CI object exist?
// If not we know we are dealing with a cache file so we'll
// simply echo out the data and exit.
- if ( ! function_exists('get_instance'))
+ if ( ! isset($CI))
{
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');
-
+ $CI->load->library('profiler');
+
if ( ! empty($this->_profiler_sections))
{
$CI->profiler->set_sections($this->_profiler_sections);
- }
+ }
// If the output data contains closing </body> and </html> tags
// we will remove them and add them back after we insert the profile data
@@ -311,7 +316,7 @@ class CI_Output {
$output .= $CI->profiler->run();
}
}
-
+
// --------------------------------------------------------------------
// Does the controller contain a function named _output()?
@@ -324,36 +329,36 @@ class CI_Output {
{
echo $output; // Send it to the browser!
}
-
+
log_message('debug', "Final output sent to browser");
- log_message('debug', "Total execution time: ".$elapsed);
+ log_message('debug', "Total execution time: ".$elapsed);
}
-
+
// --------------------------------------------------------------------
-
+
/**
* Write a Cache File
*
* @access public
* @return void
- */
+ */
function _write_cache($output)
{
- $CI =& get_instance();
+ $CI =& get_instance();
$path = $CI->config->item('cache_path');
-
+
$cache_path = ($path == '') ? BASEPATH.'cache/' : $path;
-
+
if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
{
log_message('error', "Unable to write cache file: ".$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))
@@ -361,9 +366,9 @@ class CI_Output {
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);
@@ -381,51 +386,51 @@ class CI_Output {
}
// --------------------------------------------------------------------
-
+
/**
* 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');
-
+
// 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
+
+ // 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--->', '', $match['1'])))
{
@@ -433,13 +438,13 @@ class CI_Output {
{
@unlink($filepath);
log_message('debug', "Cache file has expired. File deleted");
- return FALSE;
+ return FALSE;
}
}
// Display the cache
$this->_display(str_replace($match['0'], '', $cache));
- log_message('debug', "Cache file is current. Sending it to browser.");
+ log_message('debug', "Cache file is current. Sending it to browser.");
return TRUE;
}
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-08 23:07:24 +0100