mitm.application.djigzo.james.matchers.AbstractHeaderValueRegEx.java Source code

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Here is the source code for mitm.application.djigzo.james.matchers.AbstractHeaderValueRegEx.java

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/*
 * Copyright (c) 2008-2011, Martijn Brinkers, Djigzo.
 * 
 * This file is part of Djigzo email encryption.
 *
 * Djigzo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License 
 * version 3, 19 November 2007 as published by the Free Software 
 * Foundation.
 *
 * Djigzo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public 
 * License along with Djigzo. If not, see <http://www.gnu.org/licenses/>
 *
 * Additional permission under GNU AGPL version 3 section 7
 * 
 * If you modify this Program, or any covered work, by linking or 
 * combining it with aspectjrt.jar, aspectjweaver.jar, tyrex-1.0.3.jar, 
 * freemarker.jar, dom4j.jar, mx4j-jmx.jar, mx4j-tools.jar, 
 * spice-classman-1.0.jar, spice-loggerstore-0.5.jar, spice-salt-0.8.jar, 
 * spice-xmlpolicy-1.0.jar, saaj-api-1.3.jar, saaj-impl-1.3.jar, 
 * wsdl4j-1.6.1.jar (or modified versions of these libraries), 
 * containing parts covered by the terms of Eclipse Public License, 
 * tyrex license, freemarker license, dom4j license, mx4j license,
 * Spice Software License, Common Development and Distribution License
 * (CDDL), Common Public License (CPL) the licensors of this Program grant 
 * you additional permission to convey the resulting work.
 */
package mitm.application.djigzo.james.matchers;

import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.mail.MessagingException;

import mitm.application.djigzo.james.MailAddressUtils;
import mitm.common.mail.HeaderUtils;

import org.apache.commons.lang.StringUtils;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;

public abstract class AbstractHeaderValueRegEx extends AbstractContextAwareDjigzoMatcher {
    protected abstract String getHeader(Mail mail) throws MessagingException;

    protected abstract Pattern getHeaderValuePattern(Mail mail) throws MessagingException;

    protected Collection<MailAddress> onMatch(Mail mail, Matcher matcher) throws MessagingException, IOException {
        return MailAddressUtils.getRecipients(mail);
    }

    @Override
    public Collection<MailAddress> matchMail(Mail mail) throws MessagingException {
        try {
            String header = getHeader(mail);

            if (StringUtils.isNotEmpty(header)) {
                String[] headerValues = mail.getMessage().getHeader(header);

                if (headerValues != null) {
                    Pattern pattern = getHeaderValuePattern(mail);

                    if (pattern != null) {
                        for (String headerValue : headerValues) {
                            headerValue = HeaderUtils.decodeHeaderValue(headerValue);

                            Matcher matcher = pattern.matcher(headerValue);

                            if (matcher.find()) {
                                return onMatch(mail, matcher);
                            }
                        }
                    }
                }
            }
        } catch (IOException e) {
            throw new MessagingException("Message cannot be read.", e);
        }

        return Collections.emptyList();
    }
}