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Using Captcha component in XForms page

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Using Captcha component in XForms page

TirupatiReddy
Hi,

   We are using orbeon forms 3.7.1 developer release for our web application.  We decided to use captcha component in our Registration Form. But as for as I know Orbeon forms does not have the support for captcha component i.e. it's not implemented in orbeon forms.  

So please can you guys give me some directions how I should do that?
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Re: Using Captcha component in XForms page

Alessandro Vernet
Administrator
On Mon, Oct 5, 2009 at 4:24 PM, TirupatiReddy <[hidden email]> wrote:
>   We are using orbeon forms 3.7.1 developer release for our web
> application.  We decided to use captcha component in our Registration Form.
> But as for as I know Orbeon forms does not have the support for captcha
> component i.e. it's not implemented in orbeon forms.
>
> So please can you guys give me some directions how I should do that?

I would do this with an XBL component. In fact I was considering to do
it at some point, but the weather must have been too sunny that
particular day :). XBL is not super-complicated but you have to get
into it. I recommend you start by having a look at the "Guide to Using
and Writing XBL Components"
(http://wiki.orbeon.com/forms/doc/developer-guide/xbl-components-guide).
Then you can look at the source of some of the components that come
with Orbeon Forms. You'll find those in:
http://github.com/orbeon/orbeon-forms/tree/master/src/resources-packaged/xbl/orbeon/.
And of course, let us know if you have any question.

Alex
--
Orbeon Forms - Web forms, open-source, for the Enterprise
Orbeon's Blog: http://www.orbeon.com/blog/
My Twitter: http://twitter.com/avernet


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Re: Re: Using Captcha component in XForms page

Vincent Bonamy-4
Alessandro Vernet wrote:

> On Mon, Oct 5, 2009 at 4:24 PM, TirupatiReddy <[hidden email]> wrote:
>  
>>   We are using orbeon forms 3.7.1 developer release for our web
>> application.  We decided to use captcha component in our Registration Form.
>> But as for as I know Orbeon forms does not have the support for captcha
>> component i.e. it's not implemented in orbeon forms.
>>
>> So please can you guys give me some directions how I should do that?
>>    
>
> I would do this with an XBL component. In fact I was considering to do
> it at some point, but the weather must have been too sunny that
> particular day :). XBL is not super-complicated but you have to get
> into it. I recommend you start by having a look at the "Guide to Using
> and Writing XBL Components"
> (http://wiki.orbeon.com/forms/doc/developer-guide/xbl-components-guide).
> Then you can look at the source of some of the components that come
> with Orbeon Forms. You'll find those in:
> http://github.com/orbeon/orbeon-forms/tree/master/src/resources-packaged/xbl/orbeon/.
> And of course, let us know if you have any question.
>
> Alex
>  
Hi,

Below an example of a "Math Captcha" in XForms
(it would be nice if it could be embedded in a XBL component in Orbeon
Forms):


In the model :

  <xforms:instance id="captcha">
    <instance xmlns="">
      <value1/>
      <value2/>
      <sum/>
    </instance>
  </xforms:instance>

  <xforms:action ev:event="xforms-ready">
    <xforms:setvalue ref="instance('captcha')/value1"
value="xs:integer(random()*20)"/>
    <xforms:setvalue ref="instance('captcha')/value2"
value="xs:integer(random()*20)"/>
   </xforms:action>

      <xforms:bind nodeset="instance('captcha')/sum"
type="xs:positiveInteger" constraint="number(.) and
number(instance('captcha')/value1)+number(instance('captcha')/value2)=number(.)"/>



Next in the body :

      <xforms:group ref="xxforms:instance('captcha')">

    <fieldset>

      <legend>Math Captcha</legend>
     
      <div class="ori-category-help">Afin déviter des soumissions
automatisées et intensives réalisées par des robots malveillants, nous
vous demandons de bien vouloir répondre à cette simple question
mathématique avant de valider le formulaire.</div>

      <xforms:output ref="value1"/> + <xforms:output ref="value2"/>
      =
      <xforms:input ref="sum" incremental="true">
        <xforms:label class="hidden">Math Captcha</xforms:label>
        <xforms:alert>ne correspond pas à la somme attendue</xforms:alert>
      </xforms:input>

    </fieldset>

      </xforms:group>


Vincent.




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Re: Re: Using Captcha component in XForms page

TirupatiReddy
Thanks Alex and vincent for your responses.

For a short term solution I used the math Captcha suggested by Vincent.

Now I need to go through XBL component and then I implement later using XBL.

Vincent: Is there any simple way to generate Random text instead of Random number ?


Vincent Bonamy wrote
Alessandro Vernet wrote:
> On Mon, Oct 5, 2009 at 4:24 PM, TirupatiReddy <manyamtirupati@yahoo.com> wrote:
>  
>>   We are using orbeon forms 3.7.1 developer release for our web
>> application.  We decided to use captcha component in our Registration Form.
>> But as for as I know Orbeon forms does not have the support for captcha
>> component i.e. it's not implemented in orbeon forms.
>>
>> So please can you guys give me some directions how I should do that?
>>    
>
> I would do this with an XBL component. In fact I was considering to do
> it at some point, but the weather must have been too sunny that
> particular day :). XBL is not super-complicated but you have to get
> into it. I recommend you start by having a look at the "Guide to Using
> and Writing XBL Components"
> (http://wiki.orbeon.com/forms/doc/developer-guide/xbl-components-guide).
> Then you can look at the source of some of the components that come
> with Orbeon Forms. You'll find those in:
> http://github.com/orbeon/orbeon-forms/tree/master/src/resources-packaged/xbl/orbeon/.
> And of course, let us know if you have any question.
>
> Alex
>  

Hi,

Below an example of a "Math Captcha" in XForms
(it would be nice if it could be embedded in a XBL component in Orbeon
Forms):


In the model :

  <xforms:instance id="captcha">
    <instance xmlns="">
      <value1/>
      <value2/>
      <sum/>
    </instance>
  </xforms:instance>

  <xforms:action ev:event="xforms-ready">
    <xforms:setvalue ref="instance('captcha')/value1"
value="xs:integer(random()*20)"/>
    <xforms:setvalue ref="instance('captcha')/value2"
value="xs:integer(random()*20)"/>
   </xforms:action>

      <xforms:bind nodeset="instance('captcha')/sum"
type="xs:positiveInteger" constraint="number(.) and
number(instance('captcha')/value1)+number(instance('captcha')/value2)=number(.)"/>



Next in the body :

      <xforms:group ref="xxforms:instance('captcha')">

    <fieldset>

      <legend>Math Captcha</legend>
     
      <div class="ori-category-help">Afin déviter des soumissions
automatisées et intensives réalisées par des robots malveillants, nous
vous demandons de bien vouloir répondre à cette simple question
mathématique avant de valider le formulaire.</div>

      <xforms:output ref="value1"/> + <xforms:output ref="value2"/>
      =
      <xforms:input ref="sum" incremental="true">
        <xforms:label class="hidden">Math Captcha</xforms:label>
        <xforms:alert>ne correspond pas à la somme attendue</xforms:alert>
      </xforms:input>

    </fieldset>

      </xforms:group>


Vincent.




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