mirror of
https://github.com/Icinga/icingaweb2.git
synced 2025-10-28 18:04:07 +01:00
ba9a633b73
We have to live with some badly designed forms right now. Some have submit buttons but don't know about, others don't have such but link to foreign controllers fiddling with the form and adding different button AFTER the form got submitted - it's a mess. Relaxing the submission check to "just check whether btn_submit has a value" fixes most of this. However I do not consider this being a solution for the long run. fixes #6423 fixes #5967 refs #6540
632 lines
17 KiB
PHP
632 lines
17 KiB
PHP
<?php
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// {{{ICINGA_LICENSE_HEADER}}}
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/**
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* This file is part of Icinga Web 2.
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*
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* Icinga Web 2 - Head for multiple monitoring backends.
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* Copyright (C) 2013 Icinga Development Team
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* @copyright 2013 Icinga Development Team <info@icinga.org>
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* @license http://www.gnu.org/licenses/gpl-2.0.txt GPL, version 2
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* @author Icinga Development Team <info@icinga.org>
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*
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*/
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// {{{ICINGA_LICENSE_HEADER}}}
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namespace Icinga\Web;
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use Zend_Controller_Request_Abstract;
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use Zend_Form;
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use Zend_Config;
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use Zend_Form_Element_Submit;
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use Zend_Form_Element_Reset;
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use Zend_View_Interface;
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use Icinga\Web\Form\Element\Note;
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use Icinga\Exception\ProgrammingError;
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use Icinga\Web\Form\Decorator\HelpText;
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use Icinga\Web\Form\Decorator\BootstrapForm;
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use Icinga\Web\Form\InvalidCSRFTokenException;
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use Icinga\Application\Config as IcingaConfig;
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/**
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* Base class for forms providing CSRF protection, confirmation logic and auto submission
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*/
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class Form extends Zend_Form
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{
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/**
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* The form's request object
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*
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* @var Zend_Controller_Request_Abstract
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*/
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protected $request;
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/**
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* Main configuration
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*
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* Used as fallback if user preferences are not available.
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*
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* @var IcingaConfig
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*/
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protected $config;
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/**
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* The preference object to use instead of the one from the user (used for testing)
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*
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* @var Zend_Config
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*/
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protected $preferences;
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/**
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* Whether this form should NOT add random generated "challenge" tokens that are associated with the user's current
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* session in order to prevent Cross-Site Request Forgery (CSRF). It is the form's responsibility to verify the
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* existence and correctness of this token
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*
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* @var bool
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*/
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protected $tokenDisabled = false;
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/**
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* Name of the CSRF token element (used to create non-colliding hashes)
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*
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* @var string
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*/
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protected $tokenElementName = 'CSRFToken';
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/**
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* Flag to indicate that form is already build
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*
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* @var bool
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*/
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protected $created = false;
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/**
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* Session id used for CSRF token generation
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*
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* @var string
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*/
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protected $sessionId;
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/**
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* Label for submit button
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*
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* If omitted, no button will be shown
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*
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* @var string
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*/
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protected $submitLabel;
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/**
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* Label for cancel button
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*
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* If omitted, no button will be shown
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*
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* @var string
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*/
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protected $cancelLabel;
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/**
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* Last used note-id
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*
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* Helper to generate unique names for note elements
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*
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* @var int
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*/
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protected $last_note_id = 0;
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/**
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* Whether buttons are shown or not
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*
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* This is just a q&d solution and MUST NOT survive any refactoring!
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*
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* @var bool
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*/
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protected $buttonsHidden = false;
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/**
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* Getter for the session ID
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*
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* If the ID has never been set, the ID from session_id() is returned
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*
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* @return string
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*/
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public function getSessionId()
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{
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if (!$this->sessionId) {
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$this->sessionId = session_id();
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}
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return $this->sessionId;
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}
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/**
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* Setter for the session ID
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*
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* This method should be used for testing purposes only
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*
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* @param string $sessionId
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*/
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public function setSessionId($sessionId)
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{
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$this->sessionId = $sessionId;
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}
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/**
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* Return the HTML element name of the CSRF token field
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*
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* @return string
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*/
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public function getTokenElementName()
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{
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return $this->tokenElementName;
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}
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/**
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* Render the form to HTML
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*
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* @param Zend_View_Interface $view
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*
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* @return string
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*/
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public function render(Zend_View_Interface $view = null)
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{
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// Elements must be there to render the form
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$this->buildForm();
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return parent::render($view);
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}
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/**
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* Add elements to this form (used by extending classes)
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*/
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protected function create()
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{
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}
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/**
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* Method called before validation
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*/
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protected function preValidation(array $data)
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{
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}
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/**
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* Setter for the request
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*
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* @param Zend_Controller_Request_Abstract $request
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*/
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public function setRequest(Zend_Controller_Request_Abstract $request)
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{
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$this->request = $request;
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}
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/**
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* Getter for the request
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*
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* @return Zend_Controller_Request_Abstract
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*/
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public function getRequest()
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{
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return $this->request;
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}
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/**
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* Set the configuration to be used for this form when no preferences are set yet
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*
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* @param IcingaConfig $cfg
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*
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* @return self
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*/
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public function setConfiguration($cfg)
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{
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$this->config = $cfg;
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return $this;
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}
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/**
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* Get the main configuration
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*
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* Returns the set configuration or an empty default one.
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*
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* @return Zend_Config
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*/
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public function getConfiguration()
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{
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if ($this->config === null) {
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$this->config = new Zend_Config(array(), true);
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}
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return $this->config;
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}
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/**
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* Set preferences to be used instead of the one from the user object (used for testing)
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*
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* @param Zend_Config $prefs
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*/
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public function setUserPreferences($prefs)
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{
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$this->preferences = $prefs;
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}
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/**
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* Return the preferences of the user or the overwritten ones
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*
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* @return Zend_Config
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*/
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public function getUserPreferences()
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{
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if ($this->preferences) {
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return $this->preferences;
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}
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return $this->getRequest()->getUser()->getPreferences();
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}
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/**
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* Create the form if not done already
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*
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* Adds all elements to the form
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*/
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public function buildForm()
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{
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if ($this->created === false) {
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$this->initCsrfToken();
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$this->create();
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if (!$this->buttonsHidden && $this->submitLabel) {
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$this->addSubmitButton();
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}
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if (!$this->buttonsHidden && $this->cancelLabel) {
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$this->addCancelButton();
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}
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// Empty action if not safe
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if (!$this->getAction() && $this->getRequest()) {
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$this->setAction($this->getRequest()->getRequestUri());
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}
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$this->created = true;
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}
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}
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/**
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* Setter for the cancel label
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*
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* @param string $cancelLabel
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*/
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public function setCancelLabel($cancelLabel)
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{
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$this->cancelLabel = $cancelLabel;
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}
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/**
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* Add cancel button to form
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*/
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protected function addCancelButton()
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{
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$this->addElement(
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new Zend_Form_Element_Reset(
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array(
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'name' => 'btn_reset',
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'label' => $this->cancelLabel,
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'class' => 'btn pull-right'
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)
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)
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);
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}
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/**
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* Setter for the submit label
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*
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* @param string $submitLabel
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*/
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public function setSubmitLabel($submitLabel)
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{
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$this->submitLabel = $submitLabel;
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}
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/**
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* Add submit button to form
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*/
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protected function addSubmitButton()
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{
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$this->addElement(
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new Zend_Form_Element_Submit(
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array(
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'name' => 'btn_submit',
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'label' => $this->submitLabel
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)
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)
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);
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}
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/**
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* Add message to form
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*
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* @param string $message The message to be displayed
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* @param int $headingType Whether it should be displayed as heading (1-6) or not (null)
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*/
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public function addNote($message, $headingType = null)
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{
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$this->addElement(
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new Note(
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array(
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'escape' => $headingType === null ? false : true,
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'name' => sprintf('note_%s', $this->last_note_id++),
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'value' => $headingType === null ? $message : sprintf(
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'<h%1$s>%2$s</h%1$s>',
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$headingType,
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$message
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)
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)
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)
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);
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}
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/**
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* Enable automatic form submission on the given elements
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*
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* Enables automatic submission of this form once the user edits specific elements
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*
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* @param array $triggerElements The element names which should auto-submit the form
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*
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* @throws ProgrammingError When an element is found which does not yet exist
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*/
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public function enableAutoSubmit($triggerElements)
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{
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foreach ($triggerElements as $elementName) {
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$element = $this->getElement($elementName);
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if ($element !== null) {
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$class = $element->getAttrib('class');
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if ($class === null) {
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$class = 'autosubmit';
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} else {
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$class .= ' autosubmit';
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}
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$element->setAttrib('class', $class);
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} else {
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throw new ProgrammingError(
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'You need to add the element "' . $elementName . '" to' .
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' the form before automatic submission can be enabled!'
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);
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}
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}
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}
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/**
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* Check whether the form was submitted with a valid request
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*
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* Ensures that the current request method is POST, that the form was manually submitted and that the data provided
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* in the request is valid and gets repopulated in case its invalid.
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*
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* @return bool True when the form is submitted and valid, otherwise false
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*/
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public function isSubmittedAndValid()
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{
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if ($this->getRequest()->isPost() === false) {
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return false;
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}
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$this->buildForm();
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$checkData = $this->getRequest()->getParams();
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$this->assertValidCsrfToken($checkData);
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if ($this->isSubmitted()) {
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// perform full validation if submitted
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$this->preValidation($checkData);
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return $this->isValid($checkData);
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} else {
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// only populate if not submitted
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$this->populate($checkData);
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$this->setAttrib('data-icinga-form-modified', 'true');
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return false;
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}
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}
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/**
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* Check whether this form has been submitted
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*
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* Per default, this checks whether the button set with the 'setSubmitLabel' method
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* is being submitted. For custom submission logic, this method must be overwritten
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*
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* @return bool True when the form is marked as submitted, otherwise false
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*/
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public function isSubmitted()
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{
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// TODO: There are some missunderstandings and missconceptions to be
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// found in this class. If populate() etc would have been used as
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// designed this function would read as simple as:
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// return $this->getElement('btn_submit')->isChecked();
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if ($this->submitLabel) {
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$checkData = $this->getRequest()->getParams();
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return isset($checkData['btn_submit']) && $checkData['btn_submit'];
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}
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return true;
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}
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/**
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* Disable CSRF counter measure and remove its field if already added
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*
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* This method should be used for testing purposes only
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*
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* @param bool $disabled Set true in order to disable CSRF tokens in
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* this form (default: true), otherwise false
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*/
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public function setTokenDisabled($disabled = true)
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{
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$this->tokenDisabled = (boolean) $disabled;
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if ($disabled === true) {
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$this->removeElement($this->tokenElementName);
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}
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}
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/**
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* Add CSRF counter measure field to form
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*/
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public function initCsrfToken()
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{
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if (!$this->tokenDisabled && $this->getElement($this->tokenElementName) === null) {
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$this->addElement(
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'hidden',
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$this->tokenElementName,
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array(
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'value' => $this->generateCsrfTokenAsString()
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)
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);
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}
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}
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/**
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* Test the submitted data for a correct CSRF token
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*
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* @param array $checkData The POST data send by the user
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*
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* @throws InvalidCSRFTokenException When CSRF Validation fails
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*/
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public function assertValidCsrfToken(array $checkData)
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{
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if (!$this->tokenDisabled) {
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if (!isset($checkData[$this->tokenElementName])
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|| !$this->hasValidCsrfToken($checkData[$this->tokenElementName])
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) {
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throw new InvalidCSRFTokenException();
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}
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}
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}
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/**
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* Check whether the form's CSRF token-field has a valid value
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*
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* @param string $elementValue Value from the form element
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*
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* @return bool
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*/
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protected function hasValidCsrfToken($elementValue)
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{
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if ($this->getElement($this->tokenElementName) === null || strpos($elementValue, '|') === false) {
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return false;
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}
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list($seed, $token) = explode('|', $elementValue);
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if (!is_numeric($seed)) {
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return false;
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}
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return $token === hash('sha256', $this->getSessionId() . $seed);
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}
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/**
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* Generate a new (seed, token) pair
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*
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* @return array
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*/
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public function generateCsrfToken()
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{
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$seed = mt_rand();
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$hash = hash('sha256', $this->getSessionId() . $seed);
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return array($seed, $hash);
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}
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/**
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* Return the string representation of the CSRF seed/token pair
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*
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* @return string
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*/
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public function generateCsrfTokenAsString()
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{
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list ($seed, $token) = $this->generateCsrfToken($this->getSessionId());
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return sprintf('%s|%s', $seed, $token);
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}
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/**
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* Add a new element
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*
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* Additionally, all DtDd tags will be removed and the Bootstrap compatible
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* BootstrapForm decorator will be added to the elements
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*
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* @param string|Zend_Form_Element $element String element type, or an object of type Zend_Form_Element
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* @param string $name The name of the element to add if $element is a string
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* @param array $options The settings for the element if $element is a string
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*
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* @return self
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* @see Zend_Form::addElement()
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*/
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public function addElement($element, $name = null, $options = null)
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{
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parent::addElement($element, $name, $options);
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$el = $name !== null ? $this->getElement($name) : $element;
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if ($el) {
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if (strpos(strtolower(get_class($el)), 'hidden') !== false) {
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// Do not add structural elements to invisible elements which produces ugly views
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$el->setDecorators(array('ViewHelper'));
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} else {
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$el->removeDecorator('HtmlTag');
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$el->removeDecorator('Label');
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$el->removeDecorator('DtDdWrapper');
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$el->addDecorator(new BootstrapForm());
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$el->addDecorator(new HelpText());
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}
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}
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return $this;
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}
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/**
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* Load the default decorators
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*
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* Overwrites Zend_Form::loadDefaultDecorators to avoid having the HtmlTag-Decorator added
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*
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* @return self
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*/
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public function loadDefaultDecorators()
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{
|
|
if ($this->loadDefaultDecoratorsIsDisabled()) {
|
|
return $this;
|
|
}
|
|
|
|
$decorators = $this->getDecorators();
|
|
if (empty($decorators)) {
|
|
$this->addDecorator('FormElements')
|
|
//->addDecorator('HtmlTag', array('tag' => 'dl', 'class' => 'zend_form'))
|
|
->addDecorator('Form');
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
public function hideButtons()
|
|
{
|
|
$this->buttonsHidden = true;
|
|
}
|
|
|
|
/**
|
|
* q&d solution to be able to recreate a form
|
|
*/
|
|
public function reset()
|
|
{
|
|
$this->created = false;
|
|
$this->clearElements();
|
|
}
|
|
}
|