13 Mar
2009
13 Mar
'09
11:42 a.m.
Jerome Velociter wrote:
Vincent Massol wrote:
You are looking at a page called Simple Servlet Integration
documentation. This explains how to integrate it fast with a servlet
based environment. There's also
http://forge.octo.com/jcaptcha/confluence/display/general/5+minutes+applica…
that doesn't need servlets or requests at all, but it gives you a
BufferedImage and you pass it a String and check that it's OK.
On Mar 13, 2009, at 10:24 AM, Jerome Velociter
wrote:
The fact jcaptcha internally keeps a generated challenge response
alongside with the session for which it has been generated. It's the
SimpleImageCaptchaServlet itself that offers the image:
<servlet>
<servlet-name>jcaptcha</servlet-name>
<servlet-class>com.octo.captcha.servlet.image.SimpleImageCaptchaServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>jcaptcha</servlet-name>
<url-pattern>/jcaptcha.jpg</url-pattern>
</servlet-mapping>
So for portlet we would have to do that same work too. In the end we can
abstract everything from the environment, but I can't see an easy way of
doing it without writing a "SimpleImageCaptchaPortlet" Vincent Massol wrote:
Well this can be made indep of the environment I think.
We could just pass an object with the data needed (the user captcha
response and whatever other data is required) and create an instance
of HttpServletRequest internally and pass it to jcaptcha.
What am I missing (I'm sure I'm missing something ;))? On Mar 13, 2009, at 8:36 AM, Jerome Velociter
wrote:
> Hello Devs,
>
> I'm starting to think about the integration of JCaptcha 2.0
>
(http://forge.octo.com/jcaptcha/confluence/display/general/Simple+Servlet+In…
> )
> that would deprecated our current Captcha plugin.
> I think we need it as a component, for example xwiki-captcha
>
> We can have a CaptchaedRequestValidator component interface that
> declares the following method :
>
> boolean validateCaptcha(HttpServletRequest request);
>
> which would be called from the register action, comment add action,
> etc.
> (anywhere a captcha is needed - we could even expose a velocity
> API if
> we need it)
>
> WDYT ?
Hmm. Is it possible not to have it not depend on any environment
(servlet or other) or not? ie internally use the Execution Context
and
any passed parameters. This is important since captcha could be used
in a variety of environments, be it portlets, servlets, maybe even
web
services although that would probably be done best with a token.
Hum, the portlet
integration will have to be written if we want it.
What
JCaptcha provides is a simple servlet integration, i.e:
String userCaptchaResponse = request.getParameter("jcaptcha");
boolean captchaPassed =
SimpleImageCaptchaServlet.validateResponse(request,
userCaptchaResponse); Jerome
> Thanks
> -Vincent
>
>> So even if we make the xwiki-captcha component API independent of any
>> environment, we'll have to write code that in the end is
>> environment-dependent in the component implementation.
>> We can have for example:
>>
>> boolean validateCaptcha()
>>
>> without any parameters and retrieve what we need in the EC, but
>> still we'll have to check what environment we are called from in the
>> implementation.
>>
>>> So if it can be made to use the EC it's best, otherwise it should not
>>> have request as parameter since any implementation can have the
>>> Container object injected. If we prefer to pass a parameter (I'm
>>> still
>>> ambivalent about this, it would be better when used in non component
>>> env for sure) then Container can be passed. Again that's if we cannot
>>> make it indep of the env.
>>>
>>> Just to be sure, the public API exposed by xwiki-captcha would be
>>> generic and not tied to any captcha implementation right?
>> Yes (for now the method above is all I have in mind for an API)
>>
>> Jerome.
Overall, I don't like that it defines a component. It should be plugged
in transparently, like a filter. We should not call it explicitly from
the rest of the code. For this, we can either:
- make it a servlet filter for the moment, and register it in web.xml
- add events and use the Observation module for filtering requests
- start enhancing the container module so that it understands and uses
filters
--
Sergiu Dumitriu
http://purl.org/net/sergiu/