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<?php
/*
Written by Chris Jean for iThemes.com
Version 1.0.5
Version History
1.0.0 - 2010-12-14
Initial Test Version
1.0.1 - 2011-03-01
Fixed "Call to undefined method ITZip::add_dir()" error
1.0.2 - 2013-05-21 - Chris Jean
Removed assign by reference.
1.0.3 - 2013-06-25 - Chris Jean
Changed static function declarations to "public static".
1.0.4 - 2013-06-25 - Chris Jean
Changed unzip() function declaration to "public static".
1.0.5 - 2015-06-26 - Chris Jean
Security Fix: Sanitized filename before sending it to the exec() function.
*/
if ( ! class_exists( 'ITZip' ) ) {
class ITZip {
var $_path = '';
var $_zip = '';
var $_args = array();
function ITZip( $args = array() ) {
if ( is_string( $args ) && is_file( $args ) )
$args = array( 'file' => $args );
$default_args = array(
'delete_on_shutdown' => false,
'message_callback' => null,
'file' => null,
'force_compatibility' => false,
);
$this->_args = array_merge( $default_args, $args );
it_classes_load( 'it-file-utility.php' );
$path = ITFileUtility::create_writable_directory( array( 'name' => 'deleteme-ithemes-zip-temp', 'random' => true ) );
if ( is_wp_error( $path ) ) {
$this->_error = $path;
} else {
$this->_path = $path;
if ( file_exists( "$path/index.php" ) ) {
unlink( "$path/index.php" );
}
}
$this->_cleanup_old_temp_directories();
register_shutdown_function( array( &$this, '__destruct' ) );
}
function __destruct() {
$this->cleanup();
}
function add_content( $content, $dest ) {
if ( empty( $dest ) || ! is_string( $dest ) )
return false;
$content = maybe_serialize( $content );
$result = ITFileUtility::write( "{$this->_path}/$dest", $content );
if ( false === $result )
return false;
return true;
}
function add_file( $file, $dest = '' ) {
if ( empty( $this->_path ) )
return false;
if ( is_dir( $file ) )
return $this->add_directory( $file, $dest );
if ( ! is_file( $file ) )
return false;
$dest = $this->_normalize_dest( $file, $dest );
$dest = "{$this->_path}/$dest";
if ( ! is_dir( dirname( $dest ) ) && ( false === ITFileUtility::mkdir( dirname( $dest ) ) ) )
return false;
return copy( $file, $dest );
}
function add_directory( $dir, $dest = '' ) {
if ( empty( $this->_path ) )
return false;
if ( is_file( $dir ) )
return $this->add_file( $dir, $dest );
if ( ! is_dir( $dir ) )
return false;
it_classes_load( 'it-file-utility.php' );
$dest = $this->_normalize_dest( $dir, $dest );
if ( ! is_dir( $dest ) && ( false === ITFileUtility::mkdir( dirname( $dest ) ) ) )
return false;
$files = array_merge( glob( "$dir/*" ), glob( "$dir/.*" ) );
foreach ( (array) $files as $file ) {
if ( in_array( basename( $file ), array( '.', '..' ) ) )
continue;
if ( is_dir( $file ) )
$this->add_directory( $file, "$dest/" );
else if ( is_file( $file ) )
$this->add_file( $file, "$dest/" );
}
return true;
}
function get_file_listing() {
if ( empty( $this->_path ) )
return false;
return ITFileUtility::get_file_listing( $this->_path );
}
function cleanup() {
if ( ! empty( $this->_path ) && is_dir( $this->_path ) )
ITFileUtility::delete_directory( $this->_path );
$this->_path = '';
if ( true === $this->_args['delete_on_shutdown'] ) {
if ( ! empty( $this->_zip ) && is_file( $this->_zip ) )
@unlink( $this->_zip );
$this->_zip = '';
}
$old_temp_directories = ITFileUtility::locate_file( 'deleteme-ithemes-zip-temp-*' );
if ( ! is_wp_error( $old_temp_directories ) ) {
foreach ( (array) $old_temp_directories as $directory ) {
$stats = stat( $directory );
if ( ( time() - 3600 ) > $stats['atime'] )
ITFileUtility::delete_directory( $directory );
}
}
}
function _normalize_dest( $file, $dest ) {
$file_pathinfo = pathinfo( $file );
$dest = preg_replace( '|^/|', '', $dest );
if ( empty( $dest ) )
$dest = $file_pathinfo['basename'];
else if ( preg_match( '|/$|', $dest ) || is_dir( "{$this->_path}/$dest" ) ) {
$dest = preg_replace( '|/$|', '', $dest );
$dest .= "/{$file_pathinfo['basename']}";
}
return $dest;
}
function _message( $message ) {
if ( ! is_null( $this->_args['message_callback'] ) && is_callable( $this->_args['message_callback'] ) )
call_user_func( $this->_args['message_callback'], $message );
}
function create_zip( $args = array() ) {
if ( empty( $this->_path ) )
return false;
if ( is_string( $args ) )
$args = array( 'name' => $args );
if ( ! is_array( $args ) )
$args = array();
$default_args = array(
'file' => null,
'name' => 'temp',
'extension' => '.zip',
'disable_compression' => false,
'append_zip' => false,
'paths' => array(),
);
$args = array_merge( $default_args, $args );
if ( ! empty( $args['file'] ) && is_file( $args['file'] ) && ! is_writable( $args['file'] ) )
return new WP_Error( 'cannot_overwrite_existing_file', 'The requested zip file path to be used exists and cannot be overridden' );
if ( ! empty( $args['file'] ) ) {
if ( ! ITFileUtility::is_file_writable( $args['file'] ) )
return new WP_Error( 'create_zip_file_not_writable', 'Requested zip file name is not writable' );
$file = $args['file'];
}
else {
$file = ITFileUtility::create_writable_file( array( 'name' => $args['name'], 'extension' => $args['extension'], 'custom_search_paths' => $args['paths'] ) );
if ( is_wp_error( $file ) )
return $file;
}
$result = false;
if ( true !== $this->_args['force_compatibility'] )
$result = $this->_create_native_zip( $file, $args );
if ( true !== $result )
$result = $this->_create_compatibility_zip( $file, $args );
if ( is_wp_error( $result ) )
return $result;
else if ( true !== $result )
return new WP_Error( 'unknown_zip_failure', 'Zip file creation failed for an unknown reason' );
if ( empty( $args['file'] ) )
$this->_zip = $file;
return $file;
}
function _create_native_zip( $file, $args ) {
if ( file_exists( ABSPATH . 'zip.exe' ) )
$command = ABSPATH . 'zip.exe';
else
$command = 'zip -q';
if ( true === $args['disable_compression'] )
$command .= ' -0';
if ( file_exists( $file ) ) {
if ( true === $args['append_zip'] )
$command .= ' -g';
else
@unlink( $file );
}
$command .= ' -r ' . escapeshellarg( $file ) . ' . -i "*"';
$result = $this->_try_native_zip_command( $command, $file );
if ( true !== $result )
$result = $this->_try_native_zip_command( "/usr/bin/$command", $file );
return $result;
}
function _try_native_zip_command( $command, $file ) {
$original_cwd = getcwd();
chdir( $this->_path );
@exec( $command, $exec_return_a, $exec_return_b);
chdir( $original_cwd );
if ( ( ! file_exists( $file ) ) || ( $exec_return_b == '-1' ) ) {
if ( file_exists( $file ) )
@unlink( $file );
return false;
}
return true;
}
function _create_compatibility_zip( $file, $args ) {
if ( file_exists( $file ) && ( true !== $args['append_zip'] ) )
@unlink( $file );
require_once( ABSPATH . 'wp-admin/includes/class-pclzip.php' );
$archive = new PclZip( $file );
$command_arguments = array( $this->_path, PCLZIP_OPT_REMOVE_PATH, $this->_path );
if ( true === $args['disable_compression'] )
$command_arguments[] = PCLZIP_OPT_NO_COMPRESSION;
if ( file_exists( $file ) )
$result = call_user_func_array( array( &$archive, 'add' ), $command_arguments );
else
$result = call_user_func_array( array( &$archive, 'create' ), $command_arguments );
if ( 0 == $result )
return false;
return true;
}
public static function unzip( $file, $path, $args = array() ) {
if ( ! is_file( $file ) )
return new WP_Error( 'it_zip_load_no_file', 'Unable to find the requested file to be unzipped.' );
if ( ! is_writable( $path ) )
return new WP_Error( 'it_zip_load_no_writable_path', 'Unable to write to destination path for zip file content.' );
$default_args = array(
'force_compatibility' => false,
);
$args = array_merge( $default_args, $args );
if ( true !== $args['force_compatibility'] )
$result = ITZip::_load_native_zip( $file, $path, $args );
if ( true !== $result )
$result = ITZip::_load_compatibility_zip( $file, $path, $args );
if ( is_wp_error( $result ) )
return $result;
else if ( true !== $result )
return new WP_Error( 'unknown_zip_failure', 'Zip file loading failed for an unknown reason' );
return true;
}
public static function _load_native_zip( $file, $path, $args ) {
return false;
}
public static function _load_compatibility_zip( $file, $path, $args ) {
require_once( ABSPATH . 'wp-admin/includes/class-pclzip.php' );
$archive = new PclZip( $file );
$command_arguments = array( PCLZIP_OPT_PATH, $path );
$result = call_user_func_array( array( &$archive, 'extract' ), $command_arguments );
if ( 0 == $result )
return false;
return true;
}
function get_file_data( $zip_file, $file_name ) {
require_once( ABSPATH . 'wp-admin/includes/class-pclzip.php' );
$archive = new PclZip( $zip_file );
$command_arguments = array(
PCLZIP_OPT_BY_NAME,
$file_name,
PCLZIP_OPT_EXTRACT_AS_STRING,
);
$result = call_user_func_array( array( &$archive, 'extract' ), $command_arguments );
if ( 0 == $result )
return false;
return $result[0]['content'];
}
function _cleanup_old_temp_directories() {
}
}
}