Update website

admin/phpMyAdmin/libraries/classes/Import/Ajax.php

@@ -0,0 +1,137 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMyAdmin\Import;
+
+use PhpMyAdmin\Core;
+use function extension_loaded;
+use function function_exists;
+use function ini_get;
+use function json_encode;
+use function ucwords;
+use function uniqid;
+
+/**
+ * Handles plugins that show the upload progress.
+ */
+final class Ajax
+{
+    /**
+     * Sets up some variables for upload progress
+     */
+    public static function uploadProgressSetup(): array
+    {
+        /**
+         * constant for differentiating array in $_SESSION variable
+         */
+        $SESSION_KEY = '__upload_status';
+
+        /**
+         * sets default plugin for handling the import process
+         */
+        $_SESSION[$SESSION_KEY]['handler'] = '';
+
+        /**
+         * unique ID for each upload
+         */
+        $upload_id = uniqid('');
+
+        /**
+         * list of available plugins
+         */
+        $plugins = [
+            // in PHP 5.4 session-based upload progress was problematic, see closed bug 3964
+            //"session",
+            'progress',
+            'apc',
+            'noplugin',
+        ];
+
+        // select available plugin
+        foreach ($plugins as $plugin) {
+            $check = $plugin . 'Check';
+
+            if (self::$check()) {
+                $upload_class = 'PhpMyAdmin\Plugins\Import\Upload\Upload' . ucwords(
+                    $plugin
+                );
+                $_SESSION[$SESSION_KEY]['handler'] = $upload_class;
+                break;
+            }
+        }
+
+        return [
+            $SESSION_KEY,
+            $upload_id,
+            $plugins,
+        ];
+    }
+
+    /**
+     * Checks if APC bar extension is available and configured correctly.
+     *
+     * @return bool true if APC extension is available and if rfc1867 is enabled,
+     * false if it is not
+     */
+    public static function apcCheck()
+    {
+        if (! extension_loaded('apc')
+            || ! function_exists('apc_fetch')
+            || ! function_exists('getallheaders')
+        ) {
+            return false;
+        }
+
+        return ini_get('apc.enabled') && ini_get('apc.rfc1867');
+    }
+
+    /**
+     * Checks if PhpMyAdmin\Plugins\Import\Upload\UploadProgress bar extension is
+     * available.
+     *
+     * @return bool true if PhpMyAdmin\Plugins\Import\Upload\UploadProgress
+     * extension is available, false if it is not
+     */
+    public static function progressCheck(): bool
+    {
+        return function_exists('uploadprogress_get_info')
+            && function_exists('getallheaders');
+    }
+
+    /**
+     * Checks if PHP 5.4 session upload-progress feature is available.
+     *
+     * @return bool true if PHP 5.4 session upload-progress is available,
+     * false if it is not
+     */
+    public static function sessionCheck(): bool
+    {
+        return ini_get('session.upload_progress.enabled') === '1';
+    }
+
+    /**
+     * Default plugin for handling import.
+     * If no other plugin is available, noplugin is used.
+     *
+     * @return true
+     */
+    public static function nopluginCheck(): bool
+    {
+        return true;
+    }
+
+    /**
+     * The function outputs json encoded status of uploaded.
+     * It uses PMA_getUploadStatus, which is defined in plugin's file.
+     *
+     * @param string $id ID of transfer, usually $upload_id
+     */
+    public static function status($id): void
+    {
+        Core::headerJSON();
+        echo json_encode(
+            $_SESSION[$GLOBALS['SESSION_KEY']]['handler']::getUploadStatus($id)
+        );
+    }
+}