The Bakery Everything CakePHP

I don't know why i dosn't work with me, i cann't see the image on the page !
Everything is corect but no image :(
help me please

Hello,

This line have an error:

$this->controller->Session->write('captcha', $kaptcha->getKeyString());

Must be:
$this->controller->Session->write('captcha', $kcaptcha->getKeyString());

Missing 'c' y kcaptcha object ;-)

Hello,

This line have an error:

$this->controller->Session->write('captcha', $kaptcha->getKeyString());

Must be:
$this->controller->Session->write('captcha', $kcaptcha->getKeyString());

Missing 'c' y kcaptcha object ;-)
I notice this error and i fixed , and i cann't see the image :(

After fix problem (comment number 2) - I don't see image too.
But in debug mode 1 - I don't see error.
Error in Kcaptcha?

When I look url: site.com/users/captcha - I see JFIF bla bla may be valid code?) but at the end - I see layout. May be problem here?

You may not have the image library installed.

Check the kcaptcha docs, see what they require and then check with your host to see if they provide it.

later

I have this library, and function imagecreatejpeg - all this function present...

So. After some fun with placing $this->layout = '';
I get this:

http://surnin.kiev.ua/users/captcha (you see - this image, but wrong header).

So image generating, but not showing - wrong header... Why?

COnstruction
img src=" echo html-> ...." -not work.

Sorry for bad english ;)

Vladislav
In your response headers, the image is served as Content-Type: text/html

Yep. I know.
But why here this header? ;-)

I do all by this manual... Even creating empty captcha.thtml (without this file - not work).

Till this time I cann't find - where put wrong header.

Trouble was in space...

When I past/copy code from this page, I copy also " " in component & controller code... Then I get wrong header.

After removing "?> " in both files I got result.

Sorry for all & thanks! ;-)

Thanks, with this article in about 10 minutes I included the Captcha functionality on my user registration page.

With CakePHP it is really rapid development!

I have done everything up till Question(9) above but i can't get it to work.

After 2 nights of suffering and 12 search tabs open in Firefox, i reached the following conclusions:

- KeyString generation works fine and the keystring gets stored in Session.
- The image is generated but the headers are always sent wrong. Even if $layout = "" .. or $layout = null etc.. and even if you exit() after calling $this->Captcha->render().
- Never use IE for debugging .. use Firefox's document source.

I revised my code thoroughly for hidden spaces and missing functions .. everything is clean and still no results.

- Cakephp is not for people with high blood pressure.

- A standalone KCAPTCHA works perfectly. Therefore, all what you need is to use the index.php (that is packeged with KCAPTCHA) directly as the src of your img tag .. and to hell with Cakephp's "Vendor" crap.

now .. my question is .. how can i get Cake to output the image correctly ?

Thanks in advance.

P.S. source code will be available upon request

Hi guys,

the situation:

my image tag in the view:
<img class="captchapict" src="<?php echo $html->url('/users/captcha'); ?>" alt="This is a captcha-picture. It is used to prevent mass-access by robots. (see: http://captcha.ru)" name="Captcha">

and a textarea for a message:
<?php echo
$html->textarea('Invitation/personal', array('cols'=>'42', 'rows'=>'4')); ?>

i have a submit button that must generate a new captcha image and the data in the textarea must remain preserved / saved.
<? echo $html->submit('new ID'); ?>

but my problem is that i dont know how to implement this in cakephp. When i press the submit button (new ID) that the image is a new captcha image and the entered data in the textarea is saved!?

the form:
<form action="<?echo $html->url('/users/invite')?>" method="post"> .... </form>

can you help me? thanks!

PS: sorry for my bad english :(

MfG Maidi

Comment the echo at the end of app/webroot/index.php.

This echo is used to output performance info but it is corrupting the image file.

In my projects, I often use this Captcha. But last week i had a guestbook applications spammed by Bots, so perhaps this Captcha isnt safe anymore. Anyone else had this problem?

I tried the other captcha available here in bakery, it worked locally but my hosting provider didn't have some Libs so I had to try this one, it worked and I made some changes:
First you need to check you have GD, doing a
<?php echo phpinfo(); ?> will tell you if you have that.
Once I had it working I add a function to validation.php file (like Spout did in http://bakery.cakephp.org/articles/view/captcha-component-with-phpcaptcha) but with some changes

<?php
     function validateCaptcha($fieldName, $params) {
        $val = $this->data[$this->name][$fieldName];
      if(!defined('captcha'))
           define('captcha', 'kcaptcha');
      if (!empty($_SESSION['captcha']) && $val == $_SESSION['captcha']) {
            // clear to prevent re-use
            unset($_SESSION['captcha']);
            return true;
      }
             return false; 
    }
?>

in captcha() function I add this (not really necessary)

   function captcha(){
         if ($this->referer() != "/users/registro"){ /* "/users/registro" is the view I am calling captcha() from */
                 $this->redirect("/");
         }
         else {
             $this->Captcha->render();
        }
   }

My view looks like this

<?php echo $html->hidden("User/foo")?>
<p>Enter the text that appears above</p>
<p>
    <?php echo $html->input('User/captchaText');?>
    <?php echo $error->fieldErrors('User/captchaText'); ?>
</p>

You might wonder what is that hidden field for, someone said (don't remember where, sorry) that idea and I added, sometimes bots fills all fields they find, so we leave this field empty, if the controller checks the field is not empty then we are dealing with a bot.
Finally, in my controller I added this validation rule (so you can see how to do it on your model) as well the hidden field conditional

    if (empty($this->data['User']['foo']))    {
$this->User->validate = array('captchaText' => array('Mycaptcha' => array('method' => 'validateCaptcha', 'message' => 'your error message')));
... 
}


Hi Guys,

how it is possible to change the captcha image with an ajax request?

thank u very much for your help.

Regards,
Maidi

4s!! so slow, why?

Hi Guys,
I tried KCAPTCHA and I had the same problems as described on post (11). And I did found an answer to this question : "how can i get Cake to output the image correctly ?"

Well, rather than putting the render() method in a component, I created this controller :

Controller Class:

<?php 
class CaptchaController extends AppController {

    var $name = 'Captcha';
    var $uses = array(); 

    function index(){
        vendor('kcaptcha'.DS.'kcaptcha');
        $kcaptcha = new KCAPTCHA();
        $this->Session->write('captcha', $kcaptcha->getKeyString());
    }
}
?>

In my login view i have put :

View Template:


...
<?php
echo $form->labelTag('Captcha/usercode', 'Are you human ?').'<br/>';
echo '<img id="captcha" src="'.$html->url('/captcha').'" alt="Captcha" ></img><br/>';
echo $html->input('Captcha/captcha').'<br/>';
echo '<a href="javascript:void(0);" onclick="javascript:document.images.captcha.src=\''.$html->url('/captcha').'\'">Reload?</a><br/>';
?>
...

The javascript beneath the captcha answers the question of the post (16). "how it is possible to change the captcha image with an ajax request?". Well there's no need for an ajax request to update the captcha.

In the captcha component I have put :

Component Class:

<?php 
class CaptchaComponent extends Object
{
    function startup(&$controller){
        $this->controller = $controller;
    }

    function validateCaptcha($fieldName, $params = array()) {
        $name = $this->controller->name;
        if(isset($params['name'])){
            $name = $params['name'];
        }
        $val = $this->controller->data[$name][$fieldName];
        if (!defined('captcha'))
            define('captcha', 'kcaptcha');
        if (!empty ($_SESSION['captcha']) && $val == $_SESSION['captcha']) {
            // clear to prevent re-use
            unset ($_SESSION['captcha']);
            return true;
        }
        return false;
    }
}
?>
And finally I can put in the login action :
if($this->Captcha->validateCaptcha('captcha',array('name'=>'Captcha'))){
bla bla bla
}
It worked for me, I hope that It'll work for you. I'm using kcaptcha 1.2.5 and cake 1.18.

Friend of mine was testing something in IE and noticed that the image was not regenerated...ever...

Ideally, the kcaptcha code should already do this, but since it doesn't (and I don't like modifying vendor code)...

Just add this to your controller action:
$this->disableCache();

“vendors” method has been deprecated a while ago in the *development branch*, but in my case it was failing in silence, (no deprecation warning), so you have to do:

App::import('Vendor', 'kcaptcha/kcaptcha');

instead of:

vendor('kcaptcha/kcaptcha');