1 files changed, 140 insertions, 0 deletions
diff --git a/srcs/phpmyadmin/libraries/classes/Display/ImportAjax.php b/srcs/phpmyadmin/libraries/classes/Display/ImportAjax.php
new file mode 100644
index 0000000..97c87b9
--- /dev/null
+++ b/srcs/phpmyadmin/libraries/classes/Display/ImportAjax.php
@@ -0,0 +1,140 @@
+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * Handles plugins that show the upload progress
+ *
+ * @package PhpMyAdmin
+ */
+declare(strict_types=1);
+
+namespace PhpMyAdmin\Display;
+
+use PhpMyAdmin\Core;
+
+/**
+ * PhpMyAdmin\Display\ImportAjax class
+ *
+ * @package PhpMyAdmin
+ */
+class ImportAjax
+{
+    /**
+     * Sets up some variables for upload progress
+     *
+     * @return array
+     */
+    public static function uploadProgressSetup()
+    {
+        /**
+         * 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
+         */
+        $plugins = [
+            // PHP 5.4 session-based upload progress is problematic, see bug 3964
+            //"session",
+            "progress",
+            "apc",
+            "noplugin",
+        ];
+
+        // select available plugin
+        foreach ($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 boolean 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 boolean true if PhpMyAdmin\Plugins\Import\Upload\UploadProgress
+     * extension is available, false if it is not
+     */
+    public static function progressCheck()
+    {
+        return function_exists("uploadprogress_get_info")
+            && function_exists('getallheaders');
+    }
+
+    /**
+     * Checks if PHP 5.4 session upload-progress feature is available.
+     *
+     * @return boolean true if PHP 5.4 session upload-progress is available,
+     *                 false if it is not
+     */
+    public static function sessionCheck()
+    {
+        return ini_get('session.upload_progress.enabled');
+    }
+
+    /**
+     * Default plugin for handling import.
+     * If no other plugin is available, noplugin is used.
+     *
+     * @return boolean true
+     */
+    public static function nopluginCheck()
+    {
+        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 $upload_id
+     *
+     * @return void
+     */
+    public static function status($id)
+    {
+        Core::headerJSON();
+        echo json_encode(
+            $_SESSION[$GLOBALS['SESSION_KEY']]['handler']::getUploadStatus($id)
+        );
+    }
+}