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/* Copyright 2004, 2005, 2006 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_BELOW_AVERAGE_TIME_IN_MILLIS_REQUESTS
* Note : before first humanity check

* * @author Marc-Antoine Garrigue * @version $Id: AlwaysTestBelowAverageTimeInMillisBetweenRequestsChannelProcessor.java 1496 2006-05-23 13:38:33Z benalex $ */ 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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