507 lines
12 KiB
PHP
507 lines
12 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Service
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* @subpackage ReCaptcha
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/** @see Zend_Service_Abstract */
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require_once 'Zend/Service/Abstract.php';
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/** @see Zend_Json */
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require_once 'Zend/Json.php';
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/** @see Zend_Service_ReCaptcha_Response */
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require_once 'Zend/Service/ReCaptcha/Response.php';
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/**
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* Zend_Service_ReCaptcha
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*
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* @category Zend
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* @package Zend_Service
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* @subpackage ReCaptcha
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: ReCaptcha.php 16971 2009-07-22 18:05:45Z mikaelkael $
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*/
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class Zend_Service_ReCaptcha extends Zend_Service_Abstract
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{
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/**
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* URI to the regular API
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*
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* @var string
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*/
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const API_SERVER = 'http://api.recaptcha.net';
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/**
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* URI to the secure API
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*
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* @var string
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*/
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const API_SECURE_SERVER = 'https://api-secure.recaptcha.net';
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/**
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* URI to the verify server
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*
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* @var string
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*/
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const VERIFY_SERVER = 'http://api-verify.recaptcha.net/verify';
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/**
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* Public key used when displaying the captcha
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*
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* @var string
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*/
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protected $_publicKey = null;
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/**
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* Private key used when verifying user input
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*
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* @var string
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*/
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protected $_privateKey = null;
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/**
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* Ip address used when verifying user input
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*
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* @var string
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*/
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protected $_ip = null;
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/**
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* Parameters for the object
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*
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* @var array
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*/
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protected $_params = array(
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'ssl' => false, /* Use SSL or not when generating the recaptcha */
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'error' => null, /* The error message to display in the recaptcha */
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'xhtml' => false /* Enable XHTML output (this will not be XHTML Strict
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compliant since the IFRAME is necessary when
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Javascript is disabled) */
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);
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/**
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* Options for tailoring reCaptcha
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*
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* See the different options on http://recaptcha.net/apidocs/captcha/client.html
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*
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* @var array
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*/
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protected $_options = array(
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'theme' => 'red',
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'lang' => 'en',
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);
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/**
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* Response from the verify server
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*
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* @var Zend_Service_ReCaptcha_Response
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*/
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protected $_response = null;
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/**
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* Class constructor
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*
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* @param string $publicKey
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* @param string $privateKey
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* @param array $params
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* @param array $options
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* @param string $ip
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* @param array|Zend_Config $params
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*/
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public function __construct($publicKey = null, $privateKey = null,
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$params = null, $options = null, $ip = null)
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{
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if ($publicKey !== null) {
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$this->setPublicKey($publicKey);
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}
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if ($privateKey !== null) {
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$this->setPrivateKey($privateKey);
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}
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if ($ip !== null) {
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$this->setIp($ip);
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} else if (isset($_SERVER['REMOTE_ADDR'])) {
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$this->setIp($_SERVER['REMOTE_ADDR']);
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}
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if ($params !== null) {
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$this->setParams($params);
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}
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if ($options !== null) {
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$this->setOptions($options);
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}
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}
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/**
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* Serialize as string
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*
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* When the instance is used as a string it will display the recaptcha.
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* Since we can't throw exceptions within this method we will trigger
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* a user warning instead.
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*
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* @return string
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*/
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public function __toString()
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{
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try {
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$return = $this->getHtml();
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} catch (Exception $e) {
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$return = '';
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trigger_error($e->getMessage(), E_USER_WARNING);
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}
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return $return;
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}
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/**
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* Set the ip property
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*
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* @param string $ip
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* @return Zend_Service_ReCaptcha
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*/
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public function setIp($ip)
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{
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$this->_ip = $ip;
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return $this;
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}
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/**
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* Get the ip property
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*
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* @return string
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*/
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public function getIp()
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{
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return $this->_ip;
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}
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/**
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* Set a single parameter
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*
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* @param string $key
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* @param string $value
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* @return Zend_Service_ReCaptcha
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*/
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public function setParam($key, $value)
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{
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$this->_params[$key] = $value;
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return $this;
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}
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/**
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* Set parameters
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*
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* @param array|Zend_Config $params
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* @return Zend_Service_ReCaptcha
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* @throws Zend_Service_ReCaptcha_Exception
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*/
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public function setParams($params)
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{
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if ($params instanceof Zend_Config) {
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$params = $params->toArray();
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}
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if (is_array($params)) {
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foreach ($params as $k => $v) {
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$this->setParam($k, $v);
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}
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} else {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception(
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'Expected array or Zend_Config object'
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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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* Get the parameter array
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*
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* @return array
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*/
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public function getParams()
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{
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return $this->_params;
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}
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/**
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* Get a single parameter
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*
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* @param string $key
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* @return mixed
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*/
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public function getParam($key)
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{
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return $this->_params[$key];
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}
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/**
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* Set a single option
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*
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* @param string $key
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* @param string $value
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* @return Zend_Service_ReCaptcha
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*/
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public function setOption($key, $value)
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{
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$this->_options[$key] = $value;
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return $this;
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}
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/**
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* Set options
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*
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* @param array|Zend_Config $options
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* @return Zend_Service_ReCaptcha
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* @throws Zend_Service_ReCaptcha_Exception
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*/
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public function setOptions($options)
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{
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if ($options instanceof Zend_Config) {
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$options = $options->toArray();
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}
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if (is_array($options)) {
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foreach ($options as $k => $v) {
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$this->setOption($k, $v);
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}
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} else {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception(
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'Expected array or Zend_Config object'
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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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* Get the options array
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*
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* @return array
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*/
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public function getOptions()
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{
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return $this->_options;
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}
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/**
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* Get a single option
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*
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* @param string $key
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* @return mixed
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*/
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public function getOption($key)
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{
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return $this->_options[$key];
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}
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/**
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* Get the public key
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*
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* @return string
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*/
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public function getPublicKey()
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{
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return $this->_publicKey;
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}
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/**
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* Set the public key
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*
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* @param string $publicKey
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* @return Zend_Service_ReCaptcha
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*/
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public function setPublicKey($publicKey)
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{
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$this->_publicKey = $publicKey;
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return $this;
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}
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/**
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* Get the private key
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*
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* @return string
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*/
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public function getPrivateKey()
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{
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return $this->_privateKey;
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}
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/**
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* Set the private key
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*
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* @param string $privateKey
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* @return Zend_Service_ReCaptcha
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*/
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public function setPrivateKey($privateKey)
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{
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$this->_privateKey = $privateKey;
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return $this;
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}
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/**
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* Get the HTML code for the captcha
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*
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* This method uses the public key to fetch a recaptcha form.
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*
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* @return string
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* @throws Zend_Service_ReCaptcha_Exception
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*/
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public function getHtml()
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{
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if ($this->_publicKey === null) {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception('Missing public key');
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}
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$host = self::API_SERVER;
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if ((bool) $this->_params['ssl'] === true) {
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$host = self::API_SECURE_SERVER;
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}
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$htmlBreak = '<br>';
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$htmlInputClosing = '>';
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if ((bool) $this->_params['xhtml'] === true) {
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$htmlBreak = '<br />';
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$htmlInputClosing = '/>';
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}
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$errorPart = '';
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if (!empty($this->_params['error'])) {
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$errorPart = '&error=' . urlencode($this->_params['error']);
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}
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$reCaptchaOptions = '';
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if (!empty($this->_options)) {
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$encoded = Zend_Json::encode($this->_options);
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$reCaptchaOptions = <<<SCRIPT
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<script type="text/javascript">
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var RecaptchaOptions = {$encoded};
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</script>
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SCRIPT;
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}
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$return = $reCaptchaOptions;
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$return .= <<<HTML
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<script type="text/javascript"
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src="{$host}/challenge?k={$this->_publicKey}{$errorPart}">
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</script>
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HTML;
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$return .= <<<HTML
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<noscript>
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<iframe src="{$host}/noscript?k={$this->_publicKey}{$errorPart}"
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height="300" width="500" frameborder="0"></iframe>{$htmlBreak}
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<textarea name="recaptcha_challenge_field" rows="3" cols="40">
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</textarea>
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<input type="hidden" name="recaptcha_response_field"
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value="manual_challenge"{$htmlInputClosing}
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</noscript>
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HTML;
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return $return;
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}
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/**
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* Post a solution to the verify server
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*
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* @param string $challengeField
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* @param string $responseField
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* @return Zend_Http_Response
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* @throws Zend_Service_ReCaptcha_Exception
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*/
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protected function _post($challengeField, $responseField)
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{
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if ($this->_privateKey === null) {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception('Missing private key');
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}
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if ($this->_ip === null) {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception('Missing ip address');
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}
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if (empty($challengeField)) {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception('Missing challenge field');
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}
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if (empty($responseField)) {
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/** @see Zend_Service_ReCaptcha_Exception */
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require_once 'Zend/Service/ReCaptcha/Exception.php';
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throw new Zend_Service_ReCaptcha_Exception('Missing response field');
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}
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/* Fetch an instance of the http client */
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$httpClient = self::getHttpClient();
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$postParams = array('privatekey' => $this->_privateKey,
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'remoteip' => $this->_ip,
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'challenge' => $challengeField,
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'response' => $responseField);
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/* Make the POST and return the response */
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return $httpClient->setUri(self::VERIFY_SERVER)
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->setParameterPost($postParams)
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->request(Zend_Http_Client::POST);
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}
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/**
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* Verify the user input
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*
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* This method calls up the post method and returns a
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* Zend_Service_ReCaptcha_Response object.
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*
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* @param string $challengeField
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* @param string $responseField
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* @return Zend_Service_ReCaptcha_Response
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*/
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public function verify($challengeField, $responseField)
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{
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$response = $this->_post($challengeField, $responseField);
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return new Zend_Service_ReCaptcha_Response(null, null, $response);
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}
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}
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