collective.z3cform.norobots 1.2

Human readable captcha for z3cform

Introduction

collective.z3cform.norobots provides a “human” captcha widget based on a list of questions/answers.

This captcha can be used as a plone.app.discussiom captcha plugin.

The widget is based on z3c.form.TextWidget.

Requirements

• tested with Plone 4.0 as a plugin for plone.app.discussion, should work with Plone 3

• plone.app.z3cform

Installation

Just a simple easy_install collective.z3cform.norobots is enough.

Alternatively, buildout users can install collective.z3cform.norobots as part of a specific project’s buildout, by having a buildout configuration such as:

[buildout]
...
eggs =
    collective.z3cform.norobots
...
[instance]
...
zcml =
    collective.z3cform.norobots

In portal_setup, apply the profile collective.z3cform.norobots:default.

Add a new question

In the Plone Property Sheet “norobots_properties” (portal_properties/norobots_properties), add a new property:

Name: The question id (ex: "question4")
Value: your_question::the_answer (ex: "What is 10 + 12 ?::22")
Type: string

Usage

You can use this widget setting the “widgetFactory” property of a form field:

from zope import interface, schema
from z3c.form import interfaces, form, field, button, validator
from plone.app.z3cform.layout import wrap_form

from collective.z3cform.norobots.i18n import MessageFactory as _
from collective.z3cform.norobots.widget import NorobotsFieldWidget
from collective.z3cform.norobots.validator import NorobotsValidator

class INorobotsForm(interface.Interface):
    norobots = schema.TextLine(title=_(u'Are you a human ?'),
                               description=_(u'In order to avoid spam, please answer the question below.'),
                               required=True)

class NorobotsForm(form.Form):
    fields = field.Fields(INorobotsForm)
    fields['norobots'].widgetFactory = NorobotsFieldWidget

# wrap the form with plone.app.z3cform's Form wrapper
NorobotsFormView = wrap_form(NorobotsForm)

# Register Norobots validator for the correponding field in the IContactInfo interface
validator.WidgetValidatorDiscriminators(NorobotsValidator, field=INorobotsForm['norobots'])

for more information see contact_info.py in the plone_forms directory in the package.

Possible problems

• I have the following error: “We already have: zope.schema 3.5.4 but z3c.form 2.4.1 requires ‘zope.schema>=3.6.0’.” => You should add this extra version restriction to your buildout: http://good-py.appspot.com/release/plone.app.z3cform/0.5.0

• I have the following error when launching the tests: “ImportError: No module named lxml.html” => In order to run the tests you need lxml. You can add for example “z3c.form [test]” to your buildout. See http://plone.293351.n2.nabble.com/Custom-Dexterity-Widgets-td5594532.html for more details.

Changelog

1.2 (2010-10-31)

• Fix tests for Plone 4 [sylvainb]

1.1 - 2010-09-15

• Support for using as a plone.app.discussiom captcha plugin (Plone 4) [Petri Savolainen]

• Finnish translations [Petri Savolainen]

1.0

• Initial release [sylvainb]

Credits

• Planet Makina Corpus

• Contact us