File: /var/www/agighana.org_backup/class-ai1wm-compressor.php
<?php
/**
* Copyright (C) 2014-2025 ServMask Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Attribution: This code is part of the All-in-One WP Migration plugin, developed by
*
* ███████╗███████╗██████╗ ██╗ ██╗███╗ ███╗ █████╗ ███████╗██╗ ██╗
* ██╔════╝██╔════╝██╔══██╗██║ ██║████╗ ████║██╔══██╗██╔════╝██║ ██╔╝
* ███████╗█████╗ ██████╔╝██║ ██║██╔████╔██║███████║███████╗█████╔╝
* ╚════██║██╔══╝ ██╔══██╗╚██╗ ██╔╝██║╚██╔╝██║██╔══██║╚════██║██╔═██╗
* ███████║███████╗██║ ██║ ╚████╔╝ ██║ ╚═╝ ██║██║ ██║███████║██║ ██╗
* ╚══════╝╚══════╝╚═╝ ╚═╝ ╚═══╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝╚═╝ ╚═╝
*/
if ( ! defined( 'ABSPATH' ) ) {
die( 'Kangaroos cannot jump here' );
}
class Ai1wm_Compressor extends Ai1wm_Archiver {
/**
* Overloaded constructor that opens the passed file for writing
*
* @param string $file_name File to use as archive
*/
public function __construct( $file_name ) {
parent::__construct( $file_name, true );
}
/**
* Add a file to the archive
*
* @param string $file_name File to add to the archive
* @param string $new_file_name Write the file with a different name
* @param int $file_written File written (in bytes)
* @param int $file_offset File offset (in bytes)
*
* @throws \Ai1wm_Not_Seekable_Exception
* @throws \Ai1wm_Not_Writable_Exception
* @throws \Ai1wm_Quota_Exceeded_Exception
*
* @return bool
*/
public function add_file( $file_name, $new_file_name = '', &$file_written = 0, &$file_offset = 0 ) {
global $ai1wm_params;
$file_written = 0;
// Replace forward slash with current directory separator in file name
$file_name = ai1wm_replace_forward_slash_with_directory_separator( $file_name );
// Escape Windows directory separator in file name
$file_name = ai1wm_escape_windows_directory_separator( $file_name );
// Flag to hold if file data has been processed
$completed = true;
// Start time
$start = microtime( true );
// Open the file for reading in binary mode (fopen may return null for quarantined files)
if ( ( $file_handle = @fopen( $file_name, 'rb' ) ) ) {
$file_bytes = 0;
// Get header block
if ( ( $block = $this->get_file_block( $file_name, $new_file_name ) ) ) {
// Write header block
if ( $file_offset === 0 ) {
if ( ( $file_bytes = @fwrite( $this->file_handle, $block ) ) !== false ) {
if ( strlen( $block ) !== $file_bytes ) {
throw new Ai1wm_Quota_Exceeded_Exception( sprintf( __( 'Out of disk space. Could not write header to file. File: %s', 'all-in-one-wp-migration' ), $this->file_name ) );
}
} else {
throw new Ai1wm_Not_Writable_Exception( sprintf( __( 'Could not write header to file. File: %s', 'all-in-one-wp-migration' ), $this->file_name ) );
}
}
// Set file offset
if ( @fseek( $file_handle, $file_offset, SEEK_SET ) !== -1 ) {
// Read the file in 512KB chunks
while ( false === @feof( $file_handle ) ) {
// Read the file in chunks of 512KB
if ( ( $file_content = @fread( $file_handle, 512000 ) ) !== false ) {
// Don't encrypt package.json
if ( isset( $ai1wm_params['options']['encrypt_backups'] ) && basename( $file_name ) !== 'package.json' ) {
$file_content = ai1wm_encrypt_string( $file_content, $ai1wm_params['options']['encrypt_password'] );
}
if ( ( $file_bytes = @fwrite( $this->file_handle, $file_content ) ) !== false ) {
if ( strlen( $file_content ) !== $file_bytes ) {
throw new Ai1wm_Quota_Exceeded_Exception( sprintf( __( 'Out of disk space. Could not write content to file. File: %s', 'all-in-one-wp-migration' ), $this->file_name ) );
}
} else {
throw new Ai1wm_Not_Writable_Exception( sprintf( __( 'Could not write content to file. File: %s', 'all-in-one-wp-migration' ), $this->file_name ) );
}
// Set file written
$file_written += $file_bytes;
}
// Time elapsed
if ( ( $timeout = apply_filters( 'ai1wm_completed_timeout', 10 ) ) ) {
if ( ( microtime( true ) - $start ) > $timeout ) {
$completed = false;
break;
}
}
}
}
// Set file offset
$file_offset += $file_written;
// Write file size to file header
if ( ( $block = $this->get_file_size_block( $file_offset ) ) ) {
// Seek to beginning of file size
if ( @fseek( $this->file_handle, - $file_offset - 4096 - 12 - 14, SEEK_CUR ) === -1 ) {
throw new Ai1wm_Not_Seekable_Exception( __( 'Your PHP is 32-bit. In order to export your file, please change your PHP version to 64-bit and try again. <a href="https://help.servmask.com/knowledgebase/php-32bit/" target="_blank">Technical details</a>', 'all-in-one-wp-migration' ) );
}
// Write file size to file header
if ( ( $file_bytes = @fwrite( $this->file_handle, $block ) ) !== false ) {
if ( strlen( $block ) !== $file_bytes ) {
throw new Ai1wm_Quota_Exceeded_Exception( sprintf( __( 'Out of disk space. Could not write size to file. File: %s', 'all-in-one-wp-migration' ), $this->file_name ) );
}
} else {
throw new Ai1wm_Not_Writable_Exception( sprintf( __( 'Could not write size to file. File: %s', 'all-in-one-wp-migration' ), $this->file_name ) );
}
// Seek to end of file content
if ( @fseek( $this->file_handle, + $file_offset + 4096 + 12, SEEK_CUR ) === -1 ) {
throw new Ai1wm_Not_Seekable_Exception( __( 'Your PHP is 32-bit. In order to export your file, please change your PHP version to 64-bit and try again. <a href="https://help.servmask.com/knowledgebase/php-32bit/" target="_blank">Technical details</a>', 'all-in-one-wp-migration' ) );
}
}
}
// Close the handle
@fclose( $file_handle );
}
return $completed;
}
/**
* Generate binary block header for a file
*
* @param string $file_name Filename to generate block header for
* @param string $new_file_name Write the file with a different name
*
* @return string
*/
private function get_file_block( $file_name, $new_file_name = '' ) {
$block = '';
// Get stats about the file
if ( ( $stat = @stat( $file_name ) ) !== false ) {
// Filename of the file we are accessing
if ( empty( $new_file_name ) ) {
$name = ai1wm_basename( $file_name );
} else {
$name = ai1wm_basename( $new_file_name );
}
// Size in bytes of the file
$size = $stat['size'];
// Last time the file was modified
$date = $stat['mtime'];
// Replace current directory separator with backward slash in file path
if ( empty( $new_file_name ) ) {
$path = ai1wm_replace_directory_separator_with_forward_slash( ai1wm_dirname( $file_name ) );
} else {
$path = ai1wm_replace_directory_separator_with_forward_slash( ai1wm_dirname( $new_file_name ) );
}
// Concatenate block format parts
$format = implode( '', $this->block_format );
// Pack file data into binary string
$block = pack( $format, $name, $size, $date, $path );
}
return $block;
}
/**
* Generate file size binary block header for a file
*
* @param int $file_size File size
*
* @return string
*/
public function get_file_size_block( $file_size ) {
$block = '';
// Pack file data into binary string
if ( isset( $this->block_format[1] ) ) {
$block = pack( $this->block_format[1], $file_size );
}
return $block;
}
}