buildadmin/app/admin/controller/Ajax.php

<?php

namespace app\admin\controller;

use ba\CommandExec;
use think\Exception;
use think\exception\FileException;
use app\common\library\Upload;
use app\common\controller\Backend;
use think\facade\Db;
use app\admin\model\AdminLog;

class Ajax extends Backend
{
    protected $noNeedPermission = ['*'];

    public function initialize()
    {
        parent::initialize();
    }

    public function upload()
    {
        AdminLog::setTitle(__('upload'));
        $file = $this->request->file('file');
        try {
            $upload     = new Upload($file);
            $attachment = $upload->upload(null, $this->auth->id);
            unset($attachment['createtime'], $attachment['quote']);
        } catch (Exception | FileException $e) {
            $this->error($e->getMessage());
        }

        $this->success(__('File uploaded successfully'), [
            'file' => $attachment
        ]);
    }

    public function area()
    {
        $this->success('', get_area());
    }

    public function buildSuffixSvg()
    {
        $suffix     = $this->request->param('suffix', 'file');
        $background = $this->request->param('background');
        $content    = build_suffix_svg((string)$suffix, (string)$background);
        return response($content, 200, ['Content-Length' => strlen($content)])->contentType('image/svg+xml');
    }

    public function getTablePk($table = null)
    {
        if (!$table) {
            $this->error(__('Parameter error'));
        }
        $tablePk = Db::table($table)->getPk();
        $this->success('', ['pk' => $tablePk]);
    }

    public function changeTerminalConfig()
    {
        AdminLog::setTitle(__('changeTerminalConfig'));
        if (CommandExec::instance(false)->changeTerminalConfig()) {
            $this->success('');
        } else {
            $this->error(__('Failed to modify the terminal configuration. Please modify the configuration file manually:%s', ['/config/buildadmin.php']));
        }
    }
}