From 0bba6434f0ba3d6b1f677233c2e3c8f37b3195cc Mon Sep 17 00:00:00 2001
From: David Cox Jr <DaveMC08@gmail.com>
Date: Sun, 22 Sep 2013 02:09:36 -0400
Subject: Fixes Issue 2637 more elegant way to make sure that the comment is
 not in a js string var

---
 system/core/Output.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 7c2a64d24..b5955c008 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -847,7 +847,7 @@ class CI_Output {
 		}
 
 		// Remove CSS comments
-		$output = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!i', '', $output);
+		$output = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/(?!.*?("|\'))!i', '', $output);
 
 		// Remove Javascript inline comments
 		if ($has_tags === TRUE && strpos(strtolower($open_tag), 'script') !== FALSE)
-- 
cgit v1.2.3-24-g4f1b


From 6d917858b5ffd012bd85a0062d511d261cd6df2d Mon Sep 17 00:00:00 2001
From: David Cox Jr <DaveMC08@gmail.com>
Date: Mon, 23 Sep 2013 23:47:26 -0400
Subject: fix #2637 cleaned up the regex to remove extra qualifiers used
 character sets where possible for clarity main expression optimized

---
 system/core/Output.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index b5955c008..7a5fb66f6 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -847,7 +847,7 @@ class CI_Output {
 		}
 
 		// Remove CSS comments
-		$output = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/(?!.*?("|\'))!i', '', $output);
+		$output = preg_replace('!/\*([^/][^*]*\*)*/(?!.+?["\'])!i', '', $output);
 
 		// Remove Javascript inline comments
 		if ($has_tags === TRUE && strpos(strtolower($open_tag), 'script') !== FALSE)
-- 
cgit v1.2.3-24-g4f1b


From a442bc2bced3bd9359548c376f99027d5334a1c7 Mon Sep 17 00:00:00 2001
From: David Cox Jr <DaveMC08@gmail.com>
Date: Wed, 2 Oct 2013 23:16:51 -0400
Subject: re-fixes #2637 delimiter used for regex bounds found in neg.
 lookahead causes error using @ delimiter now for this expression

---
 system/core/Output.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 7a5fb66f6..04209d920 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -847,7 +847,7 @@ class CI_Output {
 		}
 
 		// Remove CSS comments
-		$output = preg_replace('!/\*([^/][^*]*\*)*/(?!.+?["\'])!i', '', $output);
+		$output = preg_replace('@/\*([^/][^*]*\*)*/(?!.+?["\'])@i', '', $output);
 
 		// Remove Javascript inline comments
 		if ($has_tags === TRUE && strpos(strtolower($open_tag), 'script') !== FALSE)
-- 
cgit v1.2.3-24-g4f1b


From 6614367f62d2cbd9e8f979c9349cd5474b035866 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Tue, 22 Oct 2013 15:00:11 +0300
Subject: Fix CSS minifier

---
 system/core/Output.php | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 04209d920..719c43256 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -909,12 +909,12 @@ class CI_Output {
 					$next = $array_output[$key + 1];
 
 					// Strip spaces preceded/followed by a non-ASCII character
-					// or not preceded/followed by an alphanumeric
-					// or not preceded/followed \ $ and _
+					// that are not preceded/followed by an alphanumeric character,
+					// '\', '$', '_', '.' and '#'
 					if ((preg_match('/^[\x20-\x7f]*$/D', $next) OR preg_match('/^[\x20-\x7f]*$/D', $prev))
 						&& ( ! ctype_alnum($next) OR ! ctype_alnum($prev))
-						&& ! in_array($next, array('\\', '_', '$'), TRUE)
-						&& ! in_array($prev, array('\\', '_', '$'), TRUE)
+						&& ! in_array($next, array('\\', '_', '$', '.', '#'), TRUE)
+						&& ! in_array($prev, array('\\', '_', '$', '.', '#'), TRUE)
 					)
 					{
 						unset($array_output[$key]);
-- 
cgit v1.2.3-24-g4f1b


From 6a424902ba0dbd59de2dd6e69bbf9e73d10c083d Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Mon, 28 Oct 2013 14:16:18 +0200
Subject: An alternative to CI_Output::_minify_script_style() using more
 efficient regexp patterns

---
 system/core/Output.php | 102 ++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 97 insertions(+), 5 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 719c43256..cae1347bc 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -740,13 +740,13 @@ class CI_Output {
 				preg_match_all('{<style.+</style>}msU', $output, $style_clean);
 				foreach ($style_clean[0] as $s)
 				{
-					$output = str_replace($s, $this->_minify_script_style($s, TRUE), $output);
+					$output = str_replace($s, $this->_minify_js_css($s, 'css', TRUE), $output);
 				}
 
 				// Minify the javascript in <script> tags.
 				foreach ($javascript_clean[0] as $s)
 				{
-					$javascript_mini[] = $this->_minify_script_style($s, TRUE);
+					$javascript_mini[] = $this->_minify_js_css($s, 'js', TRUE);
 				}
 
 				// Replace multiple spaces with a single space.
@@ -792,13 +792,14 @@ class CI_Output {
 			break;
 
 			case 'text/css':
+
+				return $this->_minify_js_css($output, 'css');
+
 			case 'text/javascript':
 			case 'application/javascript':
 			case 'application/x-javascript':
 
-				$output = $this->_minify_script_style($output);
-
-			break;
+				return $this->_minify_js_css($output, 'js');
 
 			default: break;
 		}
@@ -808,6 +809,97 @@ class CI_Output {
 
 	// --------------------------------------------------------------------
 
+	protected function _minify_js_css($output, $type, $tags = FALSE)
+	{
+		if ($tags === TRUE)
+		{
+			$tags = array('close' => strrchr($output, '<'));
+
+			$open_length = strpos($output, '>') + 1;
+			$tags['open'] = substr($output, 0, $open_length);
+
+			$output = substr($output, $open_length, -strlen($tags['close']));
+
+			// Strip spaces from the tags
+			$tags = preg_replace('#\s{2,}#', ' ', $tags);
+		}
+
+		$output = trim($output);
+
+		if ($type === 'js')
+		{
+			// Catch all string literals and comment blocks
+			if (preg_match_all('#((?:((?<!\\\)\'|")|/\*).*(?(2)(?<!\\\)\2|\*/))#msuUS', $output, $match, PREG_OFFSET_CAPTURE))
+			{
+				$js_literals = $js_code = array();
+				for ($match = $match[0], $c = count($match), $i = $pos = $offset = 0; $i < $c; $i++)
+				{
+					$js_code[$pos++] = substr($output, $offset, $match[$i][1] - $offset);
+					$offset = $match[$i][1] + strlen($match[$i][0]);
+
+					// Save only if we haven't matched a comment block
+					if ($match[$i][0][0] !== '/')
+					{
+						$js_literals[$pos++] = array_shift($match[$i]);
+					}
+				}
+				$js_code[$pos] = substr($output, $offset);
+
+				// $match might be quite large, so free it up together with other vars that we no longer need
+				unset($match, $offset, $pos);
+			}
+			else
+			{
+				$js_code = array($output);
+				$js_literals = array();
+			}
+
+			$varname = 'js_code';
+		}
+		else
+		{
+			$varname = 'output';
+		}
+
+		// Standartize new lines
+		$$varname = str_replace(array("\r\n", "\r"), "\n", $$varname);
+
+		if ($type === 'js')
+		{
+			$patterns = array(
+				'#\n?//[^\n]*#'					=> '',		// Remove // line comments
+				'#\s*([!#%&()*+,\-./:;<=>?@\[\]^`{|}~])\s*#'	=> '$1',	// Remove spaces following and preceeding JS-wise non-special & non-word characters
+				'#\s{2,}#'					=> ' '		// Reduce the remaining multiple whitespace characters to a single space
+			);
+		}
+		else
+		{
+			$patterns = array(
+				'#/\*.*(?=\*/)\*/#s'	=> '',		// Remove /* block comments */
+				'#\n?//[^\n]*#'		=> '',		// Remove // line comments
+				'#\s*([^\w.#%)\s*#U'	=> '$1',	// Remove spaces following and preceeding non-word characters, excluding dots, hashes and the percent sign
+				'#\s{2,}#'		=> ' '		// Reduce the remaining multiple space characters to a single space
+			);
+		}
+
+		$$varname = preg_replace(array_keys($patterns), array_values($patterns), $$varname);
+
+		// Glue back JS quoted strings
+		if ($type === 'js')
+		{
+			$js_code += $js_literals;
+			ksort($js_code);
+			$output = implode($js_code);
+			unset($js_code, $js_literals, $varname, $patterns);
+		}
+
+		return is_array($tags)
+			? $tags['open'].$output.$tags['close']
+			: $output;
+	}
+
+	// --------------------------------------------------------------------
+
 	/**
 	 * Minify Style and Script
 	 *
-- 
cgit v1.2.3-24-g4f1b


From 99f9b9a70a153c93705033b5be81d5d666468675 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Wed, 30 Oct 2013 23:07:23 +0200
Subject: Escape PCRE delimiters

---
 system/core/Output.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index cae1347bc..0b11a5abc 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -868,7 +868,7 @@ class CI_Output {
 		{
 			$patterns = array(
 				'#\n?//[^\n]*#'					=> '',		// Remove // line comments
-				'#\s*([!#%&()*+,\-./:;<=>?@\[\]^`{|}~])\s*#'	=> '$1',	// Remove spaces following and preceeding JS-wise non-special & non-word characters
+				'#\s*([!\#%&()*+,\-./:;<=>?@\[\]^`{|}~])\s*#'	=> '$1',	// Remove spaces following and preceeding JS-wise non-special & non-word characters
 				'#\s{2,}#'					=> ' '		// Reduce the remaining multiple whitespace characters to a single space
 			);
 		}
@@ -877,7 +877,7 @@ class CI_Output {
 			$patterns = array(
 				'#/\*.*(?=\*/)\*/#s'	=> '',		// Remove /* block comments */
 				'#\n?//[^\n]*#'		=> '',		// Remove // line comments
-				'#\s*([^\w.#%)\s*#U'	=> '$1',	// Remove spaces following and preceeding non-word characters, excluding dots, hashes and the percent sign
+				'#\s*([^\w.\#%])\s*#U'	=> '$1',	// Remove spaces following and preceeding non-word characters, excluding dots, hashes and the percent sign
 				'#\s{2,}#'		=> ' '		// Reduce the remaining multiple space characters to a single space
 			);
 		}
-- 
cgit v1.2.3-24-g4f1b


From 3c3bbacbf474c687393152c6a49d6d95f2239ca1 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Thu, 31 Oct 2013 15:10:49 +0200
Subject: Apply trim() on the splitted code elements

---
 system/core/Output.php | 175 ++++---------------------------------------------
 1 file changed, 11 insertions(+), 164 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 0b11a5abc..05bc48ed4 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -809,6 +809,16 @@ class CI_Output {
 
 	// --------------------------------------------------------------------
 
+	/**
+	 * Minify JavaScript and CSS code
+	 *
+	 * Strips comments and excessive whitespace characters
+	 *
+	 * @param	string	$output
+	 * @param	string	$type	'js' or 'css'
+	 * @param	bool	$tags	Whether $output contains the 'script' or 'style' tag
+	 * @return	string
+	 */
 	protected function _minify_js_css($output, $type, $tags = FALSE)
 	{
 		if ($tags === TRUE)
@@ -834,7 +844,7 @@ class CI_Output {
 				$js_literals = $js_code = array();
 				for ($match = $match[0], $c = count($match), $i = $pos = $offset = 0; $i < $c; $i++)
 				{
-					$js_code[$pos++] = substr($output, $offset, $match[$i][1] - $offset);
+					$js_code[$pos++] = trim(substr($output, $offset, $match[$i][1] - $offset));
 					$offset = $match[$i][1] + strlen($match[$i][0]);
 
 					// Save only if we haven't matched a comment block
@@ -898,169 +908,6 @@ class CI_Output {
 			: $output;
 	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * Minify Style and Script
-	 *
-	 * Reduce excessive size of CSS/JavaScript content.  To remove spaces this
-	 * script walks the string as an array and determines if the pointer is inside
-	 * a string created by single quotes or double quotes.  spaces inside those
-	 * strings are not stripped.  Opening and closing tags are severed from
-	 * the string initially and saved without stripping whitespace to preserve
-	 * the tags and any associated properties if tags are present
-	 *
-	 * Minification logic/workflow is similar to methods used by Douglas Crockford
-	 * in JSMIN. http://www.crockford.com/javascript/jsmin.html
-	 *
-	 * KNOWN ISSUE: ending a line with a closing parenthesis ')' and no semicolon
-	 * where there should be one will break the Javascript. New lines after a
-	 * closing parenthesis are not recognized by the script. For best results
-	 * be sure to terminate lines with a semicolon when appropriate.
-	 *
-	 * @param	string	$output		Output to minify
-	 * @param	bool	$has_tags	Specify if the output has style or script tags
-	 * @return	string	Minified output
-	 */
-	protected function _minify_script_style($output, $has_tags = FALSE)
-	{
-		// We only need this if there are tags in the file
-		if ($has_tags === TRUE)
-		{
-			// Remove opening tag and save for later
-			$pos = strpos($output, '>') + 1;
-			$open_tag = substr($output, 0, $pos);
-			$output = substr_replace($output, '', 0, $pos);
-
-			// Remove closing tag and save it for later
-			$pos = strrpos($output, '</');
-			$closing_tag = substr($output, $pos);
-			$output = substr_replace($output, '', $pos);
-		}
-
-		// Remove CSS comments
-		$output = preg_replace('@/\*([^/][^*]*\*)*/(?!.+?["\'])@i', '', $output);
-
-		// Remove Javascript inline comments
-		if ($has_tags === TRUE && strpos(strtolower($open_tag), 'script') !== FALSE)
-		{
-			$lines = preg_split('/\r?\n|\n?\r/', $output);
-			foreach ($lines as &$line)
-			{
-				$in_string = $in_dstring = FALSE;
-				for ($i = 0, $len = strlen($line); $i < $len; $i++)
-				{
-					if ( ! $in_string && ! $in_dstring && substr($line, $i, 2) === '//')
-					{
-						$line = substr($line, 0, $i);
-						break;
-					}
-
-					if ($line[$i] === "'" && ! $in_dstring)
-					{
-						$in_string = ! $in_string;
-					}
-					elseif ($line[$i] === '"' && ! $in_string)
-					{
-						$in_dstring = ! $in_dstring;
-					}
-				}
-			}
-
-			$output = implode("\n", $lines);
-		}
-
-		// Remove spaces around curly brackets, colons,
-		// semi-colons, parenthesis, commas
-		$chunks = preg_split('/([\'|"]).+(?![^\\\]\\1)\\1/iU', $output, -1, PREG_SPLIT_OFFSET_CAPTURE);
-		for ($i = count($chunks) - 1; $i >= 0; $i--)
-		{
-			$output = substr_replace(
-				$output,
-				preg_replace('/\s*(:|;|,|}|{|\(|\))\s*/i', '$1', $chunks[$i][0]),
-				$chunks[$i][1],
-				strlen($chunks[$i][0])
-			);
-		}
-
-		// Replace tabs with spaces
-		// Replace carriage returns & multiple new lines with single new line
-		// and trim any leading or trailing whitespace
-		$output = trim(preg_replace(array('/\t+/', '/\r/', '/\n+/'), array(' ', "\n", "\n"), $output));
-
-		// Remove spaces when safe to do so.
-		$in_string = $in_dstring = $prev = FALSE;
-		$array_output = str_split($output);
-		foreach ($array_output as $key => $value)
-		{
-			if ($in_string === FALSE && $in_dstring === FALSE)
-			{
-				if ($value === ' ')
-				{
-					// Get the next element in the array for comparisons
-					$next = $array_output[$key + 1];
-
-					// Strip spaces preceded/followed by a non-ASCII character
-					// that are not preceded/followed by an alphanumeric character,
-					// '\', '$', '_', '.' and '#'
-					if ((preg_match('/^[\x20-\x7f]*$/D', $next) OR preg_match('/^[\x20-\x7f]*$/D', $prev))
-						&& ( ! ctype_alnum($next) OR ! ctype_alnum($prev))
-						&& ! in_array($next, array('\\', '_', '$', '.', '#'), TRUE)
-						&& ! in_array($prev, array('\\', '_', '$', '.', '#'), TRUE)
-					)
-					{
-						unset($array_output[$key]);
-					}
-				}
-				else
-				{
-					// Save this value as previous for the next iteration
-					// if it is not a blank space
-					$prev = $value;
-				}
-			}
-
-			if ($value === "'" && ! $in_dstring)
-			{
-				$in_string = ! $in_string;
-			}
-			elseif ($value === '"' && ! $in_string)
-			{
-				$in_dstring = ! $in_dstring;
-			}
-		}
-
-		// Put the string back together after spaces have been stripped
-		$output = implode($array_output);
-
-		// Remove new line characters unless previous or next character is
-		// printable or Non-ASCII
-		preg_match_all('/[\n]/', $output, $lf, PREG_OFFSET_CAPTURE);
-		$removed_lf = 0;
-		foreach ($lf as $feed_position)
-		{
-			foreach ($feed_position as $position)
-			{
-				$position = $position[1] - $removed_lf;
-				$next = $output[$position + 1];
-				$prev = $output[$position - 1];
-				if ( ! ctype_print($next) && ! ctype_print($prev)
-					&& ! preg_match('/^[\x20-\x7f]*$/D', $next)
-					&& ! preg_match('/^[\x20-\x7f]*$/D', $prev)
-				)
-				{
-					$output = substr_replace($output, '', $position, 1);
-					$removed_lf++;
-				}
-			}
-		}
-
-		// Put the opening and closing tags back if applicable
-		return isset($open_tag)
-			? $open_tag.$output.$closing_tag
-			: $output;
-	}
-
 }
 
 /* End of file Output.php */
-- 
cgit v1.2.3-24-g4f1b


From 0949b36c3ebb10732223ddc890e1a41c015aa086 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Thu, 31 Oct 2013 16:07:40 +0200
Subject: Fix #2710

---
 system/core/Output.php | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 05bc48ed4..5173f7ed8 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -839,7 +839,7 @@ class CI_Output {
 		if ($type === 'js')
 		{
 			// Catch all string literals and comment blocks
-			if (preg_match_all('#((?:((?<!\\\)\'|")|/\*).*(?(2)(?<!\\\)\2|\*/))#msuUS', $output, $match, PREG_OFFSET_CAPTURE))
+			if (preg_match_all('#((?:((?<!\\\)\'|")|(/\*)|(//)).*(?(2)(?<!\\\)\2|(?(3)\*/|\n)))#msuUS', $output, $match, PREG_OFFSET_CAPTURE))
 			{
 				$js_literals = $js_code = array();
 				for ($match = $match[0], $c = count($match), $i = $pos = $offset = 0; $i < $c; $i++)
@@ -877,7 +877,6 @@ class CI_Output {
 		if ($type === 'js')
 		{
 			$patterns = array(
-				'#\n?//[^\n]*#'					=> '',		// Remove // line comments
 				'#\s*([!\#%&()*+,\-./:;<=>?@\[\]^`{|}~])\s*#'	=> '$1',	// Remove spaces following and preceeding JS-wise non-special & non-word characters
 				'#\s{2,}#'					=> ' '		// Reduce the remaining multiple whitespace characters to a single space
 			);
-- 
cgit v1.2.3-24-g4f1b


From 3ca060a00e5039aa00d4180ded52b1af49939114 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Wed, 27 Nov 2013 16:30:31 +0200
Subject: [ci skip] Remove a few more spaces

---
 system/core/Output.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 5173f7ed8..10332f0d8 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -701,7 +701,7 @@ class CI_Output {
 		else
 		{
 			header('Pragma: public');
-			header('Cache-Control: max-age=' . $max_age . ', public');
+			header('Cache-Control: max-age='.$max_age.', public');
 			header('Expires: '.gmdate('D, d M Y H:i:s', $expiration).' GMT');
 			header('Last-modified: '.gmdate('D, d M Y H:i:s', $last_modified).' GMT');
 		}
-- 
cgit v1.2.3-24-g4f1b


From 155ee7231c0ef72dc362c7d6423b2e4600024d3c Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Fri, 10 Jan 2014 15:50:54 +0200
Subject: Compress output before storing it to cache, if output compression is
 enabled

Based on PR #964
---
 system/core/Output.php | 82 ++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 62 insertions(+), 20 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 10332f0d8..d2005cc41 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -58,21 +58,21 @@ class CI_Output {
 	 *
 	 * @var	array
 	 */
-	public $headers =	array();
+	public $headers = array();
 
 	/**
 	 * List of mime types
 	 *
 	 * @var	array
 	 */
-	public $mimes =		array();
+	public $mimes =	array();
 
 	/**
 	 * Mime-type for the current page
 	 *
 	 * @var	string
 	 */
-	protected $mime_type	= 'text/html';
+	protected $mime_type = 'text/html';
 
 	/**
 	 * Enable Profiler flag
@@ -82,11 +82,18 @@ class CI_Output {
 	public $enable_profiler = FALSE;
 
 	/**
-	 * zLib output compression flag
+	 * php.ini zlib.output_compression flag
 	 *
 	 * @var	bool
 	 */
-	protected $_zlib_oc =		FALSE;
+	protected $_zlib_oc = FALSE;
+
+	/**
+	 * CI output compression flag
+	 *
+	 * @var	bool
+	 */
+	protected $_compress_output = FALSE;
 
 	/**
 	 * List of profiler sections
@@ -102,7 +109,7 @@ class CI_Output {
 	 *
 	 * @var	bool
 	 */
-	public $parse_exec_vars =	TRUE;
+	public $parse_exec_vars = TRUE;
 
 	/**
 	 * Class constructor
@@ -113,7 +120,14 @@ class CI_Output {
 	 */
 	public function __construct()
 	{
+		global $CFG;
+
 		$this->_zlib_oc = (bool) @ini_get('zlib.output_compression');
+		$this->_compress_output = (
+			$this->_zlib_oc === FALSE
+			&& $CFG->item('compress_output') === TRUE
+			&& extension_loaded('zlib')
+		);
 
 		// Get mime types for later
 		$this->mimes =& get_mimes();
@@ -436,15 +450,14 @@ class CI_Output {
 		if ($this->parse_exec_vars === TRUE)
 		{
 			$memory	= round(memory_get_usage() / 1024 / 1024, 2).'MB';
-
 			$output = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsed, $memory), $output);
 		}
 
 		// --------------------------------------------------------------------
 
 		// Is compression requested?
-		if ($CFG->item('compress_output') === TRUE && $this->_zlib_oc === FALSE
-			&& extension_loaded('zlib')
+		if (isset($CI) // This means that we're not serving a cache file, if we were, it would already be compressed
+			&& $this->_compress_output === TRUE
 			&& isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE)
 		{
 			ob_start('ob_gzhandler');
@@ -468,6 +481,21 @@ class CI_Output {
 		// simply echo out the data and exit.
 		if ( ! isset($CI))
 		{
+			if ($this->_compress_output === TRUE)
+			{
+				if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE)
+				{
+					header('Content-Encoding: gzip');
+					header('Content-Length: '.strlen($output));
+				}
+				else
+				{
+					// User agent doesn't support gzip compression,
+					// so we'll have to decompress our cache
+					$output = gzinflate(substr($output, 10, -8));
+				}
+			}
+
 			echo $output;
 			log_message('debug', 'Final output sent to browser');
 			log_message('debug', 'Total execution time: '.$elapsed);
@@ -530,9 +558,9 @@ class CI_Output {
 			return;
 		}
 
-		$uri =	$CI->config->item('base_url').
-				$CI->config->item('index_page').
-				$CI->uri->uri_string();
+		$uri = $CI->config->item('base_url')
+			.$CI->config->item('index_page')
+			.$CI->uri->uri_string();
 
 		$cache_path .= md5($uri);
 
@@ -542,16 +570,29 @@ class CI_Output {
 			return;
 		}
 
-		$expire = time() + ($this->cache_expiration * 60);
-
-		// Put together our serialized info.
-		$cache_info = serialize(array(
-			'expire'	=> $expire,
-			'headers'	=> $this->headers
-		));
-
 		if (flock($fp, LOCK_EX))
 		{
+			// If output compression is enabled, compress the cache
+			// itself, so that we don't have to do that each time
+			// we're serving it
+			if ($this->_compress_output === TRUE)
+			{
+				$output = gzencode($output);
+
+				if ($this->get_header('content-type') === NULL)
+				{
+					$this->set_content_type($this->mime_type);
+				}
+			}
+
+			$expire = time() + ($this->cache_expiration * 60);
+
+			// Put together our serialized info.
+			$cache_info = serialize(array(
+				'expire'	=> $expire,
+				'headers'	=> $this->headers
+			));
+
 			fwrite($fp, $cache_info.'ENDCI--->'.$output);
 			flock($fp, LOCK_UN);
 		}
@@ -560,6 +601,7 @@ class CI_Output {
 			log_message('error', 'Unable to secure a file lock for file at: '.$cache_path);
 			return;
 		}
+
 		fclose($fp);
 		@chmod($cache_path, FILE_WRITE_MODE);
 
-- 
cgit v1.2.3-24-g4f1b


From 9916bfc126b0d6efa337740b263f123c5367fc55 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Fri, 10 Jan 2014 16:21:07 +0200
Subject: Use config_item() in CI_Output::__construct()

---
 system/core/Output.php | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index d2005cc41..cdb92b3c6 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -120,12 +120,10 @@ class CI_Output {
 	 */
 	public function __construct()
 	{
-		global $CFG;
-
 		$this->_zlib_oc = (bool) @ini_get('zlib.output_compression');
 		$this->_compress_output = (
 			$this->_zlib_oc === FALSE
-			&& $CFG->item('compress_output') === TRUE
+			&& config_item('compress_output') === TRUE
 			&& extension_loaded('zlib')
 		);
 
-- 
cgit v1.2.3-24-g4f1b


From d8b1ad31cf7ee205ddf3cf396b1d1bfa45af49fa Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Wed, 15 Jan 2014 17:42:52 +0200
Subject: Fix #2822: Incorrect usage of fwrite()

We only used to check (and not always) if the return value of fwrite() is boolean FALSE,
while it is possible that the otherwise returned bytecount is less than the length of
data that we're trying to write. This allowed incomplete writes over network streams
and possibly a few other edge cases.
---
 system/core/Output.php | 44 +++++++++++++++++++++++++++++++-------------
 1 file changed, 31 insertions(+), 13 deletions(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 10332f0d8..a7680b3d0 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -542,17 +542,26 @@ class CI_Output {
 			return;
 		}
 
-		$expire = time() + ($this->cache_expiration * 60);
-
-		// Put together our serialized info.
-		$cache_info = serialize(array(
-			'expire'	=> $expire,
-			'headers'	=> $this->headers
-		));
-
 		if (flock($fp, LOCK_EX))
 		{
-			fwrite($fp, $cache_info.'ENDCI--->'.$output);
+			$expire = time() + ($this->cache_expiration * 60);
+
+			// Put together our serialized info.
+			$cache_info = serialize(array(
+				'expire'	=> $expire,
+				'headers'	=> $this->headers
+			));
+
+			$output = $cache_info.'ENDCI--->'.$output;
+
+			for ($written = 0, $length = strlen($output); $written < $length; $written += $result)
+			{
+				if (($result = fwrite($fp, substr($output, $written))) === FALSE)
+				{
+					break;
+				}
+			}
+
 			flock($fp, LOCK_UN);
 		}
 		else
@@ -560,13 +569,22 @@ class CI_Output {
 			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: '.$cache_path);
+		if (is_int($result))
+		{
+			@chmod($cache_path, FILE_WRITE_MODE);
+			log_message('debug', 'Cache file written: '.$cache_path);
 
-		// Send HTTP cache-control headers to browser to match file cache settings.
-		$this->set_cache_header($_SERVER['REQUEST_TIME'], $expire);
+			// Send HTTP cache-control headers to browser to match file cache settings.
+			$this->set_cache_header($_SERVER['REQUEST_TIME'], $expire);
+		}
+		else
+		{
+			@unlink($cache_path);
+			log_message('error', 'Unable to write the complete cache content at: '.$cache_path);
+		}
 	}
 
 	// --------------------------------------------------------------------
-- 
cgit v1.2.3-24-g4f1b


From 871754af60251993d640981e107d2def5f2db396 Mon Sep 17 00:00:00 2001
From: darwinel <kmorssink@gmail.com>
Date: Tue, 11 Feb 2014 17:34:57 +0100
Subject: 2013 > 2014

Update copyright notices from 2013 to 2014.
And update one calendar example in user_guide from year 2013/2014 to
2014/2015.
---
 system/core/Output.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'system/core/Output.php')

diff --git a/system/core/Output.php b/system/core/Output.php
index 2ad8e90fa..ef56a97bf 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -18,7 +18,7 @@
  *
  * @package		CodeIgniter
  * @author		EllisLab Dev Team
- * @copyright	Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
+ * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
  * @since		Version 1.0
-- 
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