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File Name : AjaxWrapper.php

<?php

/**
 * @package   Duplicator
 * @copyright (c) 2022, Snap Creek LLC
 */

namespace Duplicator\Ajax;

use DUP_Handler;
use DUP_Log;
use DUP_Util;
use Duplicator\Libs\Snap\SnapIO;
use Duplicator\Libs\Snap\SnapUtil;
use Exception;

class AjaxWrapper
{
    /**
     * This function wrap a callback and return always a json well formatted output.
     *
     * check nonce and capability if passed and return a json with this format
     * [
     *      success : bool
     *      data : [
     *          funcData : mixed    // callback return data
     *          message : string    // a message for jvascript func (for example an exception message)
     *          output : string     // all normal output wrapped between ob_start and ob_get_clean
     *                              // if $errorUnespectedOutput is true and output isn't empty the json return an error
     *      ]
     * ]
     *
     * @param callable $callback              callback function
     * @param string   $nonceaction           if action is null don't verify nonce
     * @param string   $nonce                 nonce string
     * @param string   $capability            if capability is null don't verify capability
     * @param bool     $errorUnespectedOutput if true thorw exception with unespected optput
     *
     * @return void
     */
    public static function json(
        $callback,
        $nonceaction = null,
        $nonce = null,
        $capability = null,
        $errorUnespectedOutput = true
    ) {
        $error = false;

$result = array(
            'funcData' => null,
            'output'   => '',
            'message'  => ''
        );

ob_start();
        try {
            DUP_Handler::init_error_handler();
            $nonce = SnapUtil::sanitizeNSCharsNewline($nonce);
            if (is_null($nonceaction) || !wp_verify_nonce($nonce, $nonceaction)) {
                DUP_Log::trace('Security issue');
                throw new Exception('Security issue');
            }
            if (!is_null($capability)) {
                DUP_Util::hasCapability($capability, DUP_Util::SECURE_ISSUE_THROW);
            }

// execute ajax function
            $result['funcData'] = call_user_func($callback);
        } catch (Exception $e) {
            $error             = true;
            $result['message'] = $e->getMessage();
        }

$result['output'] = ob_get_clean();
        if ($errorUnespectedOutput && !empty($result['output'])) {
            $error = true;
        }

if ($error) {
            wp_send_json_error($result);
        } else {
            wp_send_json_success($result);
        }
    }

/**
     * This function wrap a callback and start a chunked file download.
     * The callback must return a file path.
     *
     * @param callable():false|array{path:string,name:string} $callback              Callback function that return a file path for download or false on error
     * @param string                                          $nonceaction           if action is null don't verify nonce
     * @param string                                          $nonce                 nonce string
     * @param bool                                            $errorUnespectedOutput if true thorw exception with unespected optput
     *
     * @return never
     */
    public static function fileDownload(
        $callback,
        $nonceaction = null,
        $nonce = null,
        $errorUnespectedOutput = true
    ) {
        ob_start();
        try {
            DUP_Handler::init_error_handler();
            $nonce = SnapUtil::sanitizeNSCharsNewline($nonce);
            if (!is_null($nonceaction) && !wp_verify_nonce($nonce, $nonceaction)) {
                DUP_Log::trace('Security issue');
                throw new Exception('Security issue');
            }

// execute ajax function
            if (($fileInfo = call_user_func($callback)) === false) {
                throw new Exception('Error generating file');
            }

if (!@file_exists($fileInfo['path'])) {
                throw new Exception('File ' . $fileInfo['path'] . ' not found');
            }

$result['output'] = ob_get_clean();
            if ($errorUnespectedOutput && !empty($result['output'])) {
                throw new Exception('Unespected output');
            }

SnapIO::serveFileForDownload($fileInfo['path'], $fileInfo['name'], DUPLICATOR_BUFFER_READ_WRITE_SIZE);
        } catch (Exception $e) {
            DUP_Log::trace($e->getMessage());
            SnapIO::serverError500();
        }
    }
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	1194/1197	0755	2025-12-17 02:23:04
..	dir	-	1194/1197	0755	2025-12-17 02:23:04
.htaccess	text/plain	200 B	1194/1197	0644	2026-02-13 05:21:42
AbstractAjaxService.php	text/x-php	562 B	1194/1197	0644	2025-05-13 09:41:11
AjaxWrapper.php	text/x-php	4.52 KB	1194/1197	0644	2025-05-13 09:41:11
ServicesDashboard.php	text/x-php	1.82 KB	1194/1197	0644	2025-12-11 09:57:24
ServicesEducation.php	text/x-php	17.36 KB	1194/1197	0644	2025-12-11 10:15:04
ServicesExtraPlugins.php	text/x-php	1.19 KB	1194/1197	0644	2025-12-11 10:04:52
ServicesNotifications.php	text/x-php	1.64 KB	1194/1197	0644	2025-12-12 01:50:42
ServicesTools.php	text/x-php	1.46 KB	1194/1197	0644	2025-05-13 09:41:11

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