/wp-content/plugins/wp-super-cache/wp-cache-phase1.php

<?php

//error_reporting(E_ERROR | E_PARSE); // uncomment to debug this file!

// Pre-2.6 compatibility

if( !defined('WP_CONTENT_DIR') )

	define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );



if( !include( WP_CONTENT_DIR . '/wp-cache-config.php' ) )

	return true;

if( !defined( 'WPCACHEHOME' ) )

	define('WPCACHEHOME', dirname(__FILE__).'/');



include( WPCACHEHOME . 'wp-cache-base.php');



if( $blogcacheid != '' ) {

	$blog_cache_dir = str_replace( '//', '/', $cache_path . "blogs/" . $blogcacheid . '/' );

} else {

	$blog_cache_dir = $cache_path;

}



$mutex_filename = 'wp_cache_mutex.lock';

$new_cache = false;



// Don't change variables behind this point



if( !isset( $wp_cache_plugins_dir ) )

	$wp_cache_plugins_dir = WPCACHEHOME . 'plugins';



require_once( WPCACHEHOME . 'wp-cache-phase2.php');



$plugins = glob( $wp_cache_plugins_dir . '/*.php' );

if( is_array( $plugins ) ) {

	foreach ( $plugins as $plugin ) {

	if( is_file( $plugin ) )

		require_once( $plugin );

	}

}



if (!$cache_enabled || $_SERVER["REQUEST_METHOD"] == 'POST') 

	return true;



$file_expired = false;

$cache_filename = '';

$meta_file = '';

$wp_cache_gzip_encoding = '';



$gzipped = 0;

$gzsize = 0;



function gzip_accepted(){

	if( ini_get( 'zlib.output_compression' ) ) // don't compress WP-Cache data files when PHP is already doing it

		return false;



	if (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') === false) return false;

	return 'gzip';

}



if ($cache_compression) {

	$wp_cache_gzip_encoding = gzip_accepted();

}



add_cacheaction( 'wp_cache_get_cookies_values', 'wp_cache_check_mobile' );



$wp_cache_request_uri = $_SERVER[ 'REQUEST_URI' ]; // Cache this in case any plugin modifies it.



if ( $wp_cache_object_cache ) {

	if ( ! include_once( WP_CONTENT_DIR . '/object-cache.php' ) )

		return;

	

	wp_cache_init(); // Note: wp-settings.php calls wp_cache_init() which clobbers the object made here.

	

	if ( ! is_object( $wp_object_cache ) )

		return;

}



if( false == @is_dir( $blog_cache_dir ) ) {

	@mkdir( $cache_path . "blogs" );

	@mkdir( $blog_cache_dir );

}



if( false == @is_dir( $blog_cache_dir . 'meta' ) )

	@mkdir( $blog_cache_dir . 'meta' );





$wp_start_time = microtime();



function get_wp_cache_key( $url = false ) {

	global $wp_cache_request_uri, $wp_cache_gzip_encoding;

	if ( !$url )

		$url = $wp_cache_request_uri;

	return do_cacheaction( 'wp_cache_key', $_SERVER['HTTP_HOST'] . intval( $_SERVER[ 'SERVER_PORT' ] ) . preg_replace('/#.*$/', '', str_replace( '/index.php', '/', $url ) ) . $wp_cache_gzip_encoding . wp_cache_get_cookies_values() );

}



function wp_super_cache_init() {

	global $wp_cache_key, $key, $blogcacheid, $wp_cache_request_uri, $file_prefix, $blog_cache_dir, $meta_file, $cache_file, $cache_filename, $wp_super_cache_debug, $meta_pathname, $wp_cache_gzip_encoding, $meta;



	$wp_cache_key = get_wp_cache_key();

	$key = $blogcacheid . md5( $wp_cache_key );

	$wp_cache_key = $blogcacheid . $wp_cache_key;



	$cache_filename = $file_prefix . $key . '.html';

	$meta_file = $file_prefix . $key . '.meta';

	$cache_file = realpath( $blog_cache_dir . $cache_filename );

	$meta_pathname = realpath( $blog_cache_dir . 'meta/' . $meta_file );

	return compact( 'key', 'cache_filename', 'meta_file', 'cache_file', 'meta_pathname' );

}



function wp_cache_serve_cache_file() {

	global $key, $blogcacheid, $wp_cache_request_uri, $file_prefix, $blog_cache_dir, $meta_file, $cache_file, $cache_filename, $wp_super_cache_debug, $meta_pathname, $wp_cache_gzip_encoding, $meta;

	global $wp_cache_object_cache, $cache_compression, $wp_cache_slash_check;



	extract( wp_super_cache_init() );



	if ( wp_cache_user_agent_is_rejected() ) {

		if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "No wp-cache file served as user agent rejected.", 5 );

		return false;

	}



	if ( $wp_cache_object_cache && wp_cache_get_cookies_values() == '' ) { 

		if ( !empty( $_GET ) ) {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Non empty GET request. Not serving request from object cache", 1 );

			return false;

		}



		$oc_key = get_oc_key();

		$meta_filename = $oc_key . ".meta";

		if ( gzip_accepted() ) {

			$oc_key .= ".gz";

			$meta_filename .= ".gz";

		}

		$cache = wp_cache_get( $oc_key, 'supercache' );

		$meta = unserialize( wp_cache_get( $meta_filename, 'supercache' ) );

		if ( is_array( $meta ) == false ) {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Meta array from object cache corrupt. Ignoring cache.", 1 );

			return true;

		}

	} elseif ( file_exists( $cache_file ) ) {

		if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "wp-cache file exists: $cache_file", 5 );

		if ( !( $meta = unserialize( @file_get_contents( $meta_pathname) ) ) )  {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "couldn't load wp-cache meta file", 5 );

			return true;

		}

		if ( is_array( $meta ) == false ) {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "meta array corrupt, deleting $meta_pathname and $cache_file", 1 );

			@unlink( $meta_pathname );

			@unlink( $cache_file );

			return true;

		}

	} else {

		// last chance, check if a supercache file exists. Just in case .htaccess rules don't work on this host

		$file = get_current_url_supercache_dir() . "index.html";

		if ( ( $wp_cache_request_uri == '/' || ( $wp_cache_slash_check && substr( $wp_cache_request_uri, -1 ) == '/' ) || ( $wp_cache_slash_check == 0 && substr( $wp_cache_request_uri, -1 ) != '/' ) ) && ( wp_cache_get_cookies_values() == '' && empty( $_GET ) && file_exists( $file ) ) ) {

			header( "Content-type: text/html; charset=UTF-8" ); // UTF-8 hard coded is bad but we don't know what it is this early in the process

			header( "Vary: Accept-Encoding, Cookie" );

			header( "Cache-Control: max-age=300, must-revalidate" );

			header( "WP-Cache: Served supercache file from PHP" );

			readfile( $file );

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Served page from supercache file. Mod rewrite rules may be broken or missing.", 5 );

			die();

		} else {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "No wp-cache file exists. Must generate a new one.", 5 );

			return false;

		}

	}

	$cache_file = do_cacheaction( 'wp_cache_served_cache_file', $cache_file );

	// Sometimes the gzip headers are lost. Make sure html returned isn't compressed!

	if ( $cache_compression && $wp_cache_gzip_encoding && !in_array( 'Content-Encoding: ' . $wp_cache_gzip_encoding, $meta[ 'headers' ] ) ) {

		$ungzip = true;

		if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "GZIP headers not found. Force uncompressed output.", 1 );

	} else {

		$ungzip = false;

	}

	foreach ($meta[ 'headers' ] as $t => $header) {

		// godaddy fix, via http://blog.gneu.org/2008/05/wp-supercache-on-godaddy/ and http://www.littleredrails.com/blog/2007/09/08/using-wp-cache-on-godaddy-500-error/

		if( strpos( $header, 'Last-Modified:' ) === false ) 

			header($header);

	}

	header( 'WP-Super-Cache: WP-Cache' );

	if ( $wp_cache_object_cache ) { 

		if ( $cache ) {

			if ( $ungzip ) {

				$uncompressed = gzuncompress( $cache );

				if ( $uncompressed ) {

					if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Uncompressed gzipped cache file from object cache", 1 );

					$cache = $uncompressed;

					unset( $uncompressed );

				}

			}

			if ( $meta[ 'dynamic' ] ) {

				if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache dynamic file from object cache", 5 );

				eval( '?>' . $cache . '<?php ' );

			} else {

				if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache static file from object cache", 5 );

				echo $cache;

			}

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "exit request", 5 );

			die();

		}

	} else {

		if ( $meta[ 'dynamic' ] ) {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache dynamic file", 5 );

			if ( $ungzip ) {

				$cache = file_get_contents( $cache_file );

				$uncompressed = gzuncompress( $cache );

				if ( $uncompressed ) {

					if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Uncompressed gzipped cache file from wp-cache", 1 );

					unset( $cache );

					eval( '?>' . $uncompressed . '<?php ' );

				} else {

					eval( '?>' . $cache . '<?php ' );

				}

			} else {

				include( $cache_file );

			}

		} else {

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache static file", 5 );

			if ( $ungzip ) {

				$cache = file_get_contents( $cache_file );

				$uncompressed = gzuncompress( $cache );

				if ( $uncompressed ) {

					if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Uncompressed gzipped cache file from wp-cache", 1 );

					echo $uncompressed;

				} else {

					echo $cache;

				}

			} else {

				readfile( $cache_file );

			}

		}

		if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "exit request", 5 );

		die();

	}

}



if(defined('DOING_CRON')) {

	extract( wp_super_cache_init() );

	return true;

}



if ( !isset( $wp_super_cache_late_init ) || ( isset( $wp_super_cache_late_init ) && false == $wp_super_cache_late_init ) ) {

	wp_cache_serve_cache_file();

}



function wp_cache_postload() {

	global $cache_enabled, $wp_super_cache_late_init, $wp_super_cache_debug;



	if ( !$cache_enabled || isset( $_GET[ 'preview' ] ) )

		return true;



	if ( isset( $wp_super_cache_late_init ) && true == $wp_super_cache_late_init ) {

		if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Supercache Late Init: add wp_cache_serve_cache_file to init", 3 );

		add_action( 'init', 'wp_cache_late_loader', 9999 );

	} else {

		wp_super_cache_init();

		wp_cache_phase2();

	}

}



function wp_cache_late_loader() {

	global $wp_super_cache_debug;

	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Supercache Late Loader running on init", 3 );

	wp_cache_serve_cache_file();

	wp_cache_phase2();

}



function wp_cache_get_cookies_values() {

	$string = '';

	while ($key = key($_COOKIE)) {

		if ( preg_match( "/^wp-postpass|^wordpress_logged_in|^comment_author_/", $key ) ) {

			if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cookie detected: $key", 5 );

			$string .= $_COOKIE[ $key ] . ",";

		}

		next($_COOKIE);

	}

	reset($_COOKIE);



	// If you use this hook, make sure you update your .htaccess rules with the same conditions

	$string = do_cacheaction( 'wp_cache_get_cookies_values', $string );

	return $string;

}



function add_cacheaction( $action, $func ) {

	global $wp_supercache_actions;

	$wp_supercache_actions[ $action ][] = $func;

}



function do_cacheaction( $action, $value = '' ) {

	global $wp_supercache_actions;

	if( array_key_exists($action, $wp_supercache_actions) && is_array( $wp_supercache_actions[ $action ] ) ) {

		$actions = $wp_supercache_actions[ $action ];

		foreach( $actions as $func ) {

			$value = $func( $value );

		}

	}



	return $value;

}



function wp_cache_mobile_group( $user_agent ) {

	global $wp_cache_mobile_groups;

	foreach( (array)$wp_cache_mobile_groups as $name => $group ) {

		foreach( (array)$group as $browser ) {

			$browser = trim( strtolower( $browser ) );

			if ( $browser != '' && strstr( $user_agent, $browser ) ) {

				return $browser;

			}

		}

	}

	return "mobile";

}



// From http://wordpress.org/extend/plugins/wordpress-mobile-edition/ by Alex King

function wp_cache_check_mobile( $cache_key ) {

	global $wp_cache_mobile_enabled, $wp_cache_mobile_browsers, $wp_cache_mobile_prefixes;

	if( !isset( $wp_cache_mobile_enabled ) || false == $wp_cache_mobile_enabled )

		return $cache_key;



	if (!isset($_SERVER["HTTP_USER_AGENT"])) {

		return $cache_key;

	}



	$browsers = explode( ',', $wp_cache_mobile_browsers );

	$user_agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );

	foreach ($browsers as $browser) {

		if ( strstr( $user_agent, trim( strtolower( $browser ) ) ) ) {

			if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "mobile browser detected: " . $_SERVER[ "HTTP_USER_AGENT" ], 5 );

			return $cache_key . '-' . wp_cache_mobile_group( $user_agent );

		}

	}

	if (isset($_SERVER['HTTP_X_WAP_PROFILE']) ) 

		return $cache_key . '-' . $_SERVER['HTTP_X_WAP_PROFILE'];

	if (isset($_SERVER['HTTP_PROFILE']) )

		return $cache_key . '-' . $_SERVER['HTTP_PROFILE'];



	if ( isset( $wp_cache_mobile_prefixes ) ) {

		$browsers = explode( ',', $wp_cache_mobile_prefixes );

		foreach ($browsers as $browser_prefix) {

			if ( substr($user_agent, 0, 4) == $browser_prefix ) {

				if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "mobile browser (prefix) detected: " . $_SERVER[ "HTTP_USER_AGENT" ], 5 );

				return $cache_key . '-' . $browser_prefix;

			}

		}

	}

	$accept = strtolower($_SERVER['HTTP_ACCEPT']);

	if (strpos($accept, 'wap') !== false) {

		return $cache_key . '-' . 'wap';

	}



	if (isset($_SERVER['ALL_HTTP']) && strpos(strtolower($_SERVER['ALL_HTTP']), 'operamini') !== false) {

		return $cache_key . '-' . 'operamini';

	}

	return $cache_key;

}



function wp_cache_debug( $message, $level = 1 ) {

	global $wp_cache_debug_level, $wp_cache_debug_log, $wp_cache_debug_email, $cache_path, $wp_cache_debug_ip, $wp_super_cache_debug;



	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug == false )

		return false;



	if ( isset( $wp_cache_debug_email ) == false && isset( $wp_cache_debug_log ) == false )

		return false;



	if ( isset( $wp_cache_debug_level ) == false )

		$wp_cache_debug_level = 1;

	if ( $wp_cache_debug_level < $level )

		return false;



	if ( isset( $wp_cache_debug_ip ) && $wp_cache_debug_ip != '' && $wp_cache_debug_ip != $_SERVER[ 'REMOTE_ADDR' ] )

		return false;



	if ( isset( $wp_cache_debug_log ) && $wp_cache_debug_log != '' ) {

		error_log( date( 'H:i:s' ) . " " . $_SERVER[ 'REQUEST_URI' ] . " " . $message . "\n", 3, $cache_path . str_replace( '/', '', str_replace( '..', '', $wp_cache_debug_log ) ) );

	}



	if ( isset( $wp_cache_debug_email ) && $wp_cache_debug_email != ''  ) {

		$message .= "\n\nDisable these emails by commenting out or deleting the line containing\n\$wp_cache_debug_email in wp-content/wp-cache-config.php on your server.\n";

		mail( $wp_cache_debug_email, '[' . addslashes( $_SERVER[ 'HTTP_HOST' ] ) . "] WP Super Cache Debug", $message );

	}

}



function wp_cache_user_agent_is_rejected() {

	global $cache_rejected_user_agent;



	if (!function_exists('apache_request_headers')) return false;

	$headers = apache_request_headers();

	if (!isset($headers["User-Agent"])) return false;

	foreach ($cache_rejected_user_agent as $expr) {

		if (strlen($expr) > 0 && stristr($headers["User-Agent"], $expr))

			return true;

	}

	return false;

}



function get_current_url_supercache_dir( $post_id = 0 ) {

	global $cached_direct_pages, $cache_path, $wp_cache_request_uri;



	if ( $post_id != 0 ) {

		$uri = str_replace( site_url(), '', get_permalink( $post_id ) );

	} else {

		$uri = $wp_cache_request_uri;

	}

	$uri = preg_replace('/[ <>\'\"\r\n\t\(\)]/', '', str_replace( '/index.php', '/', str_replace( '..', '', preg_replace("/(\?.*)?$/", '', $uri ) ) ) );

	$uri = str_replace( '\\', '', $uri );

	$dir = strtolower(preg_replace('/:.*$/', '',  $_SERVER["HTTP_HOST"])) . $uri; // To avoid XSS attacks

	if ( function_exists( "apply_filters" ) )

		$dir = apply_filters( 'supercache_dir', $dir );

	$dir = $cache_path . 'supercache/' . $dir . '/';

	if( is_array( $cached_direct_pages ) && in_array( $_SERVER[ 'REQUEST_URI' ], $cached_direct_pages ) ) {

		$dir = ABSPATH . $uri . '/';

	}

	$dir = str_replace( '//', '/', $dir );

	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "supercache dir: $dir", 5 );

	return $dir;

}



function get_oc_version() {

	$wp_cache_oc_key = wp_cache_get( "wp_cache_oc_key" );

	if ( ! $wp_cache_oc_key ) {

		$wp_cache_oc_key[ 'key' ] = reset_oc_version();

	} elseif ( $wp_cache_oc_key[ 'ts' ] < time() - 600 )

		wp_cache_set( "wp_cache_oc_key", array( 'ts' => time(), 'key' => $wp_cache_oc_key[ 'key' ] ) );

	return $wp_cache_oc_key[ 'key' ];

}



function reset_oc_version( $version = 1 ) {

	if ( $version == 1 )

		$version = mt_rand();

	wp_cache_set( "wp_cache_oc_key", array( 'ts' => time(), 'key' => $version ) );



	return $version;

}



function get_oc_key( $url = false ) {

	global $wp_cache_gzip_encoding;



	if ( $url ) {

		$key = intval( $_SERVER[ 'SERVER_PORT' ] ) . strtolower( preg_replace( '/:.*$/', '',  $_SERVER[ "HTTP_HOST" ] ) ) . $url;

	} else {

		$key = get_current_url_supercache_dir();

	}

	return $key . $wp_cache_gzip_encoding . get_oc_version();

}



?>