1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
<?php
/**
* TReCaptcha class file
*
* @author Bérczi Gábor <gabor.berczi@devworx.hu>
* @link http://www.devworx.hu/
* @copyright Copyright © 2011 DevWorx
* @license http://www.pradosoft.com/license/
* @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));
}
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)
$this->Page->ClientScript->registerEndScript($this->getClientID().'::refresh','Recaptcha.reload();');
}
public function renderContents($writer)
{
$writer->write(TJavaScript::renderScriptBlock(
'var RecaptchaOptions = '.TJavaScript::jsonEncode($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);
}
}
?>
|
