/*
* Copyright (c) 2003-2011, Simon Brown
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* - Neither the name of Pebble nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package net.sourceforge.pebble.event.response;
import net.sourceforge.pebble.PluginProperties;
import net.sourceforge.pebble.domain.Response;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Checks comment and TrackBack content for specified regexs and sets
* the state of such responses to pending. This includes all user-definable
* fields of the response : title, content, source name and source link. The
* spam score is incremented for each field that exceeds the threshold.
*
* @author Simon Brown
*/
public class ContentSpamListener extends BlogEntryResponseListenerSupport {
/** the log used by this class */
private static final Log log = LogFactory.getLog(ContentSpamListener.class);
/** the default regex list */
public static final String DEFAULT_REGEX_LIST = "cialis, viagra, poker, casino, xanax, holdem, hold-em, hold em, sex, craps, fuck, shit, teenage, phentermine, blackjack, roulette, gambling, pharmacy, carisoprodol, pills, penis, penis enlargement, anal, hentai, anime, vicodin, massage, nude, ejaculation, porn, gay, naked, girl, teens, babe, masturbating, squirt, incest, fetish, discount, cheap, interesdting, levitra, government, grants, loan, &\\#.*;, kasino, slots, play, bingo, mortgage, baccarat";
/** the default threshold for the number of content matches */
public static final int DEFAULT_THRESHOLD = 0;
/** the name of the regex list property */
public static final String REGEX_LIST_KEY = "ContentSpamListener.regexList";
/** the name of the threshold property */
public static final String THRESHOLD_KEY = "ContentSpamListener.threshold";
/**
* Called when a comment or TrackBack has been added.
*
* @param response a Response
*/
protected void blogEntryResponseAdded(Response response) {
PluginProperties props = response.getBlogEntry().getBlog().getPluginProperties();
String regexList = props.getProperty(REGEX_LIST_KEY);
String regexes[] = null;
if (regexList != null) {
regexes = regexList.split(",");
} else {
regexes = new String[0];
}
int threshold = DEFAULT_THRESHOLD;
if (props.hasProperty(THRESHOLD_KEY)) {
try {
threshold = Integer.parseInt(props.getProperty(THRESHOLD_KEY));
} catch (NumberFormatException nfe) {
log.error(nfe.getMessage());
// do nothing, the value has already been defaulted
}
}
// check each of the fields in turn
if (!contentWithinThreshold(response.getTitle(), regexes, threshold)) {
log.info(response.getTitle() + " marked as pending : threshold for title exceeded");
response.setPending();
response.incrementSpamScore();
}
if (!contentWithinThreshold(response.getSourceName(), regexes, threshold)) {
log.info(response.getTitle() + " marked as pending : threshold for source name exceeded");
response.setPending();
response.incrementSpamScore();
}
if (!contentWithinThreshold(response.getSourceLink(), regexes, threshold)) {
log.info(response.getTitle() + " marked as pending : threshold for source link exceeded");
response.setPending();
response.incrementSpamScore();
}
if (!contentWithinThreshold(response.getContent(), regexes, threshold)) {
log.info(response.getTitle() + " marked as pending : threshold for content exceeded");
response.setPending();
response.incrementSpamScore();
}
}
private boolean contentWithinThreshold(String content, String regexes[], int threshold) {
if (content == null || content.trim().length() == 0) {
return true;
}
int count = 0;
for (int i = 0; i < regexes.length; i++) {
Pattern p = Pattern.compile(regexes[i].trim(), Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
Matcher m = p.matcher(content);
while (m.find()) {
count++;
if (count > threshold) {
return false;
}
}
}
return true;
}
}