mediawiki-extensions-Confir.../ReCaptcha.php

134 lines
3.7 KiB
PHP

<?php
/**
* Captcha class using the reCAPTCHA widget.
* Stop Spam. Read Books.
*
* @addtogroup Extensions
* @author Mike Crawford <mike.crawford@gmail.com>
* @copyright Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
* @licence MIT/X11
*/
if( !defined( 'MEDIAWIKI' ) ) {
exit;
}
$wgExtensionMessagesFiles['ReCaptcha'] = dirname( __FILE__ ) . '/ReCaptcha.i18n.php';
require_once( 'recaptchalib.php' );
// Set these in LocalSettings.php
$wgReCaptchaPublicKey = '';
$wgReCaptchaPrivateKey = '';
// For backwards compatibility
$recaptcha_public_key = '';
$recaptcha_private_key = '';
$wgExtensionFunctions[] = 'efReCaptcha';
/**
* Make sure the keys are defined.
*/
function efReCaptcha() {
global $wgReCaptchaPublicKey, $wgReCaptchaPrivateKey;
global $recaptcha_public_key, $recaptcha_private_key;
global $wgServerName;
// Backwards compatibility
if ( $wgReCaptchaPublicKey == '' ) {
$wgReCaptchaPublicKey = $recaptcha_public_key;
}
if ( $wgReCaptchaPrivateKey == '' ) {
$wgReCaptchaPrivateKey = $recaptcha_private_key;
}
if ($wgReCaptchaPublicKey == '' || $wgReCaptchaPrivateKey == '') {
die ('You need to set $wgReCaptchaPrivateKey and $wgReCaptchaPublicKey in LocalSettings.php to ' .
"use the reCAPTCHA plugin. You can sign up for a key <a href='" .
htmlentities(recaptcha_get_signup_url ($wgServerName, "mediawiki")) . "'>here</a>.");
}
}
class ReCaptcha extends SimpleCaptcha {
//reCAPTHCA error code returned from recaptcha_check_answer
private $recaptcha_error = null;
/**
* Displays the reCAPTCHA widget.
* If $this->recaptcha_error is set, it will display an error in the widget.
*
*/
function getForm() {
global $wgReCaptchaPublicKey;
return "<script>var RecaptchaOptions = { tabindex : 1 }; </script> " .
recaptcha_get_html($wgReCaptchaPublicKey, $this->recaptcha_error);
}
/**
* Calls the library function recaptcha_check_answer to verify the users input.
* Sets $this->recaptcha_error if the user is incorrect.
* @return boolean
*
*/
function passCaptcha() {
global $wgReCaptchaPrivateKey;
$recaptcha_response = recaptcha_check_answer ($wgReCaptchaPrivateKey,
wfGetIP (),
$_POST['recaptcha_challenge_field'],
$_POST['recaptcha_response_field']);
if (!$recaptcha_response->is_valid) {
$this->recaptcha_error = $recaptcha_response->error;
return false;
}
$recaptcha_error = null;
return true;
}
/**
* Called on all edit page saves. (EditFilter events)
* @return boolean - true if page save should continue, false if should display Captcha widget.
*/
function confirmEdit( $editPage, $newtext, $section, $merged = false ) {
if( $this->shouldCheck( $editPage, $newtext, $section ) ) {
if (!isset($_POST['recaptcha_response_field'])) {
//User has not yet been presented with Captcha, show the widget.
$editPage->showEditForm( array( &$this, 'editCallback' ) );
return false;
}
if( $this->passCaptcha() ) {
return true;
} else {
//Try again - show the widget
$editPage->showEditForm( array( &$this, 'editCallback' ) );
return false;
}
} else {
wfDebug( "ConfirmEdit: no need to show captcha.\n" );
return true;
}
}
/**
* Show a message asking the user to enter a captcha on edit
* The result will be treated as wiki text
*
* @param $action Action being performed
* @return string
*/
function getMessage( $action ) {
$name = 'recaptcha-' . $action;
$text = wfMsg( $name );
# Obtain a more tailored message, if possible, otherwise, fall back to
# the default for edits
return wfEmptyMsg( $name, $text ) ? wfMsg( 'recaptcha-edit' ) : $text;
}
}