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Diffstat (limited to 'lib/prado/framework/Web/UI/WebControls/TReCaptcha.php')
-rw-r--r-- | lib/prado/framework/Web/UI/WebControls/TReCaptcha.php | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/lib/prado/framework/Web/UI/WebControls/TReCaptcha.php b/lib/prado/framework/Web/UI/WebControls/TReCaptcha.php new file mode 100644 index 0000000..89053d1 --- /dev/null +++ b/lib/prado/framework/Web/UI/WebControls/TReCaptcha.php @@ -0,0 +1,271 @@ +<?php + +/** + * TReCaptcha class file + * + * @author Bérczi Gábor <gabor.berczi@devworx.hu> + * @link http://www.devworx.hu/ + * @copyright Copyright © 2011 DevWorx + * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT + * @package System.Web.UI.WebControls + */ + + Prado::using('System.3rdParty.ReCaptcha.recaptchalib'); + +/** + * TReCaptcha class. + * + * TReCaptcha displays a reCAPTCHA (a token displayed as an image) that can be used + * to determine if the input is entered by a real user instead of some program. It can + * also prevent multiple submits of the same form either by accident, or on purpose (ie. spamming). + * + * The reCAPTCHA to solve (a string consisting of two separate words) displayed is automatically + * generated by the reCAPTCHA system at recaptcha.net. However, in order to use the services + * of the site you will need to register and get a public and a private API key pair, and + * supply those to the reCAPTCHA control through setting the {@link setPrivateKey PrivateKey} + * and {@link setPublicKey PublicKey} properties. + * + * Currently the reCAPTCHA API supports only one reCAPTCHA field per page, so you MUST make sure that all + * your input is protected and validated by a single reCAPTCHA control. Placing more than one reCAPTCHA + * control on the page will lead to unpredictable results, and the user will most likely unable to solve + * any of them successfully. + * + * Upon postback, user input can be validated by calling {@link validate()}. + * The {@link TReCaptchaValidator} control can also be used to do validation, which provides + * server-side validation. Calling (@link validate()) will invalidate the token supplied, so all consecutive + * calls to the method - without solving a new captcha - will return false. Therefore if implementing a multi-stage + * input process, you must make sure that you call validate() only once, either at the end of the input process, or + * you store the result till the end of the processing. + * + * The following template shows a typical use of TReCaptcha control: + * <code> + * <com:TReCaptcha ID="Captcha" + * PublicKey="..." + * PrivateKey="..." + * /> + * <com:TReCaptchaValidator ControlToValidate="Captcha" + * ErrorMessage="You are challenged!" /> + * </code> + * + * @author Bérczi Gábor <gabor.berczi@devworx.hu> + * @package System.Web.UI.WebControls + * @since 3.2 + */ +class TReCaptcha extends TWebControl implements IValidatable +{ + private $_isValid=true; + + const ChallengeFieldName = 'recaptcha_challenge_field'; + const ResponseFieldName = 'recaptcha_response_field'; + + public function getTagName() + { + return 'span'; + } + + /** + * Returns true if this control validated successfully. + * Defaults to true. + * @return bool wether this control validated successfully. + */ + public function getIsValid() + { + return $this->_isValid; + } + /** + * @param bool wether this control is valid. + */ + public function setIsValid($value) + { + $this->_isValid=TPropertyValue::ensureBoolean($value); + } + + public function getValidationPropertyValue() + { + return $this->Request[$this->getChallengeFieldName()]; + } + + public function getPublicKey() + { + return $this->getViewState('PublicKey'); + } + + public function setPublicKey($value) + { + return $this->setViewState('PublicKey', TPropertyValue::ensureString($value)); + } + + public function getPrivateKey() + { + return $this->getViewState('PrivateKey'); + } + + public function setPrivateKey($value) + { + return $this->setViewState('PrivateKey', TPropertyValue::ensureString($value)); + } + + public function getThemeName() + { + return $this->getViewState('ThemeName'); + } + + public function setThemeName($value) + { + return $this->setViewState('ThemeName', TPropertyValue::ensureString($value)); + } + + public function getCustomTranslations() + { + return TPropertyValue::ensureArray($this->getViewState('CustomTranslations')); + } + + public function setCustomTranslations($value) + { + return $this->setViewState('CustomTranslations', TPropertyValue::ensureArray($value)); + } + + public function getLanguage() + { + return $this->getViewState('Language'); + } + + public function setLanguage($value) + { + return $this->setViewState('Language', TPropertyValue::ensureString($value)); + } + + public function getCallbackScript() + { + return $this->getViewState('CallbackScript'); + } + + public function setCallbackScript($value) + { + return $this->setViewState('CallbackScript', TPropertyValue::ensureString($value)); + } + + protected function getChallengeFieldName() + { + return /*$this->ClientID.'_'.*/self::ChallengeFieldName; + } + + public function getResponseFieldName() + { + return /*$this->ClientID.'_'.*/self::ResponseFieldName; + } + + public function getClientSideOptions() + { + $options = array(); + if ($theme = $this->getThemeName()) + $options['theme'] = $theme; + if ($lang = $this->getLanguage()) + $options['lang'] = $lang; + if ($trans = $this->getCustomTranslations()) + $options['custom_translations'] = $trans; + return $options; + } + + public function validate() + { + if (! + ( + ($challenge = @$_POST[$this->getChallengeFieldName()]) + and + ($response = @$_POST[$this->getResponseFieldName()]) + ) + ) + return false; + + $resp = recaptcha_check_answer( + $this->getPrivateKey(), + $_SERVER["REMOTE_ADDR"], + $challenge, + $response + ); + return ($resp->is_valid==1); + } + + /** + * Checks for API keys + * @param mixed event parameter + */ + public function onPreRender($param) + { + parent::onPreRender($param); + + if("" == $this->getPublicKey()) + throw new TConfigurationException('recaptcha_publickey_unknown'); + if("" == $this->getPrivateKey()) + throw new TConfigurationException('recaptcha_privatekey_unknown'); + + // need to register captcha fields so they will be sent back also in callbacks + $page = $this->getPage(); + $page->registerRequiresPostData($this->getChallengeFieldName()); + $page->registerRequiresPostData($this->getResponseFieldName()); + } + + protected function addAttributesToRender($writer) + { + parent::addAttributesToRender($writer); + $writer->addAttribute('id',$this->getClientID()); + } + + public function regenerateToken() + { + // if we're in a callback, then schedule re-rendering of the control + // if not, don't do anything, because a new challenge will be rendered anyway + if ($this->Page->IsCallback) + $this->Page->CallbackClient->jQuery($this->getClientID().' #recaptcha_reload','click'); + } + + public function renderContents($writer) + { + $readyscript = 'jQuery(document).trigger('.TJavaScript::quoteString('captchaready:'.$this->getClientID()).')'; + $cs = $this->Page->ClientScript; + $id = $this->getClientID(); + $divid = $id.'_1_recaptchadiv'; + $writer->write('<div id="'.htmlspecialchars($divid).'">'); + + if (!$this->Page->IsCallback) + { + $writer->write(TJavaScript::renderScriptBlock( + 'var RecaptchaOptions = '.TJavaScript::jsonEncode($this->getClientSideOptions()).';' + )); + + $html = recaptcha_get_html($this->getPublicKey()); + /* + reCAPTCHA currently does not support multiple validations per page + $html = str_replace( + array(self::ChallengeFieldName,self::ResponseFieldName), + array($this->getChallengeFieldName(),$this->getResponseFieldName()), + $html + ); + */ + $writer->write($html); + + $cs->registerEndScript('ReCaptcha::EventScript', 'jQuery(document).ready(function() { '.$readyscript.'; } );'); + } + else + { + $options = $this->getClientSideOptions(); + $options['callback'] = new TJavaScriptLiteral('function() { '.$readyscript.'; '.$this->getCallbackScript().'; }'); + $cs->registerScriptFile('ReCaptcha::AjaxScript', 'http://www.google.com/recaptcha/api/js/recaptcha_ajax.js'); + $cs->registerEndScript('ReCaptcha::CreateScript::'.$id, implode(' ', array( + 'if (!jQuery('.TJavaScript::quoteString('#'.$this->getResponseFieldName()).'))', + '{', + 'Recaptcha.destroy();', + 'Recaptcha.create(', + TJavaScript::quoteString($this->getPublicKey()).', ', + TJavaScript::quoteString($divid).', ', + TJavaScript::encode($options), + ');', + '}', + ))); + } + + $writer->write('</div>'); + } + +} |