org.acegisecurity.captcha.AlwaysTestBelowAverageTimeInMillisBetweenRequestsChannelProcessor Maven / Gradle / Ivy
/* Copyright 2004, 2005 Acegi Technology Pty Limited
*
* Licensed 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.acegisecurity.captcha;
import org.springframework.util.Assert;
/**
*
* return false if thresold is lower than average time millis between any
* CaptchaChannelProcessorTemplate mapped urls requests and is human;
* Default keyword : REQUIRES_CAPTCHA_AFTER_THRESOLD_IN_MILLIS
* Note : before first humanity check
*
*
* @author Marc-Antoine Garrigue
* @version $Id: AlwaysTestBelowAverageTimeInMillisBetweenRequestsChannelProcessor.java,v 1.2 2005/11/17 00:55:49 benalex Exp $
*/
public class AlwaysTestBelowAverageTimeInMillisBetweenRequestsChannelProcessor
extends CaptchaChannelProcessorTemplate {
//~ Static fields/initializers =============================================
/** Keyword for this channelProcessor */
public static final String DEFAULT_KEYWORD = "REQUIRES_CAPTCHA_BELOW_AVERAGE_TIME_IN_MILLIS_REQUESTS";
//~ Constructors ===========================================================
/**
* Constructor
*/
public AlwaysTestBelowAverageTimeInMillisBetweenRequestsChannelProcessor() {
super();
this.setKeyword(DEFAULT_KEYWORD);
}
//~ Methods ================================================================
/**
* Verify if thresold is > 0
*
* @throws Exception if false
*/
public void afterPropertiesSet() throws Exception {
super.afterPropertiesSet();
Assert.isTrue(getThresold() > 0, "thresold must be > 0");
}
/**
* Verify wheter the context is valid concerning humanity
*
* @param context
*
* @return true if valid, false otherwise
*/
boolean isContextValidConcerningHumanity(CaptchaSecurityContext context) {
int req = context.getHumanRestrictedResourcesRequestsCount();
float thresold = getThresold();
float duration = System.currentTimeMillis()
- context.getLastPassedCaptchaDateInMillis();
float average;
if (req == 0) {
average = thresold + 1;
} else {
average = duration / req;
}
if (context.isHuman() && (average > thresold)) {
logger.debug(
"context is valid : average time between requests < thresold && is human");
return true;
} else {
logger.debug(
"context is not valid : request count > thresold or is not human");
return false;
}
}
}
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