/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.examples.captcha;
import org.apache.wicket.PageParameters;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.RequiredTextField;
import org.apache.wicket.markup.html.image.Image;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.util.value.ValueMap;
/**
* Captcha example page.
*
* @author Joshua Perlow
*/
public class Captcha extends WicketExamplePage
{
private final class CaptchaForm extends Form
{
private static final long serialVersionUID = 1L;
private final CaptchaImageResource captchaImageResource;
/**
* Construct.
*
* @param id
*/
public CaptchaForm(String id)
{
super(id);
captchaImageResource = new CaptchaImageResource(imagePass);
add(new Image("captchaImage", captchaImageResource));
add(new RequiredTextField("password", new PropertyModel(properties, "password"))
{
protected final void onComponentTag(final ComponentTag tag)
{
super.onComponentTag(tag);
// clear the field after each render
tag.put("value", "");
}
});
}
/**
* @see org.apache.wicket.markup.html.form.Form#onSubmit()
*/
public void onSubmit()
{
if (!imagePass.equals(getPassword()))
{
error("Captcha password '" + getPassword() + "' is wrong.\n"
+ "Correct password was: " + imagePass);
}
else
{
info("Success!");
}
// force redrawing
captchaImageResource.invalidate();
}
}
private static final long serialVersionUID = 1L;
private static int randomInt(int min, int max)
{
return (int)(Math.random() * (max - min) + min);
}
private static String randomString(int min, int max)
{
int num = randomInt(min, max);
byte b[] = new byte[num];
for (int i = 0; i < num; i++)
b[i] = (byte)randomInt('a', 'z');
return new String(b);
}
/** Random captcha password to match against. */
private String imagePass = randomString(6, 8);
private final ValueMap properties = new ValueMap();
/**
* Construct.
*
* @param parameters
*/
public Captcha(final PageParameters parameters)
{
final FeedbackPanel feedback = new FeedbackPanel("feedback");
add(feedback);
add(new CaptchaForm("captchaForm"));
}
private String getPassword()
{
return properties.getString("password");
}
}