<?php

// 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( 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 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 = do_cacheaction( 'wp_cache_key', $_SERVER['HTTP_HOST'].preg_replace('/#.*$/', '', str_replace( '/index.php', '/', $wp_cache_request_uri ) ).$wp_cache_gzip_encoding.wp_cache_get_cookies_values() );

	$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;

	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 ( file_exists( $cache_file ) ) {

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

		}

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

		// Sometimes the gzip headers are lost. If this is a gzip capable client, send those headers.

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

			$meta[ 'headers' ][ 'Content-Encoding' ] =  'Content-Encoding: ' . $wp_cache_gzip_encoding;

			$meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';

			if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "added gzip headers before serving.", 1 );

		}

		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 ( $meta[ 'dynamic' ] ) {

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

			include($cache_file);

		} else {

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

			readfile( $cache_file );

		}

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

	}

}

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|^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( is_array( $wp_supercache_actions[ $action ] ) ) {

		$actions = $wp_supercache_actions[ $action ];

		foreach( $actions as $func ) {

			$value = $func( $value );

		}

	}

	return $value;

}

// 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_whitelist;

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

		return $cache_key;

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

		return $cache_key;

	}

	$whitelist = explode( ',', $wp_cache_mobile_whitelist );

	foreach ($whitelist as $browser) {

		if (strstr($_SERVER["HTTP_USER_AGENT"], trim($browser))) {

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

			return $cache_key;

		}

	}

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

	foreach ($browsers as $browser) {

		if (strstr($_SERVER["HTTP_USER_AGENT"], trim( $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 . $browser;

		}

	}

	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;

}

?>