Source Code Cross Referenced for UseHeaderRecipients.java in  » Net » james-2.3.1 » org » apache » james » transport » mailets » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » james 2.3.1 » org.apache.james.transport.mailets 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /****************************************************************
002:         * Licensed to the Apache Software Foundation (ASF) under one   *
003:         * or more contributor license agreements.  See the NOTICE file *
004:         * distributed with this work for additional information        *
005:         * regarding copyright ownership.  The ASF licenses this file   *
006:         * to you under the Apache License, Version 2.0 (the            *
007:         * "License"); you may not use this file except in compliance   *
008:         * with the License.  You may obtain a copy of the License at   *
009:         *                                                              *
010:         *   http://www.apache.org/licenses/LICENSE-2.0                 *
011:         *                                                              *
012:         * Unless required by applicable law or agreed to in writing,   *
013:         * software distributed under the License is distributed on an  *
014:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015:         * KIND, either express or implied.  See the License for the    *
016:         * specific language governing permissions and limitations      *
017:         * under the License.                                           *
018:         ****************************************************************/package org.apache.james.transport.mailets;
019:
020:        import org.apache.mailet.GenericMailet;
021:        import org.apache.mailet.Mail;
022:        import org.apache.mailet.MailAddress;
023:
024:        import javax.mail.MessagingException;
025:        import javax.mail.internet.InternetAddress;
026:        import javax.mail.internet.MimeMessage;
027:        import java.util.Collection;
028:        import java.util.StringTokenizer;
029:        import java.util.Vector;
030:
031:        /**
032:         * <p>Mailet designed to process the recipients from the mail headers rather
033:         * than the recipients specified in the SMTP message header.  This can be
034:         * useful if your mail is redirected on-route by a mail server that
035:         * substitutes a fixed recipient address for the original.</p>
036:         *
037:         * <p>To use this, match against the redirection address using the
038:         * <code>RecipientIs</code> matcher and set the mailet 'class' to
039:         * <code>UseHeaderRecipients</code>.  This will cause the email to be
040:         * re-injected into the root process with the recipient substituted
041:         * by all the recipients in the Mail-For, To and Cc headers
042:         * of the message.</p>
043:         *
044:         * <p>e.g.</p>
045:         * <pre>
046:         *    <mailet match="RecipientIs=forwarded@myhost"
047:         *            class="UseHeaderRecipients">
048:         *    </mailet>
049:         * </pre>
050:         *
051:         * @version 1.0.0, 24/11/2000
052:         */
053:        public class UseHeaderRecipients extends GenericMailet {
054:
055:            /**
056:             * Controls certain log messages
057:             */
058:            private boolean isDebug = false;
059:
060:            /**
061:             * Initialize the mailet
062:             *
063:             * initializes the DEBUG flag
064:             */
065:            public void init() {
066:                isDebug = (getInitParameter("debug") == null) ? false
067:                        : new Boolean(getInitParameter("debug")).booleanValue();
068:            }
069:
070:            /**
071:             * Process an incoming email, removing the currently identified
072:             * recipients and replacing them with the recipients indicated in
073:             * the Mail-For, To and Cc headers of the actual email.
074:             *
075:             * @param mail incoming email
076:             */
077:            public void service(Mail mail) throws MessagingException {
078:                MimeMessage message = mail.getMessage();
079:
080:                // Utilise features of Set Collections such that they automatically
081:                // ensure that no two entries are equal using the equality method
082:                // of the element objects.  MailAddress objects test equality based
083:                // on equivalent but not necessarily visually identical addresses.
084:                Collection recipients = mail.getRecipients();
085:                // Wipe all the exist recipients
086:                recipients.clear();
087:                recipients.addAll(getHeaderMailAddresses(message, "Mail-For"));
088:                if (recipients.isEmpty()) {
089:                    recipients.addAll(getHeaderMailAddresses(message, "To"));
090:                    recipients.addAll(getHeaderMailAddresses(message, "Cc"));
091:                }
092:                if (isDebug) {
093:                    log("All recipients = " + recipients.toString());
094:                    log("Reprocessing mail using recipients in message headers");
095:                }
096:
097:                // Return email to the "root" process.
098:                getMailetContext().sendMail(mail.getSender(),
099:                        mail.getRecipients(), mail.getMessage());
100:                mail.setState(Mail.GHOST);
101:            }
102:
103:            /**
104:             * Return a string describing this mailet.
105:             *
106:             * @return a string describing this mailet
107:             */
108:            public String getMailetInfo() {
109:                return "UseHeaderRecipients Mailet";
110:            }
111:
112:            /**
113:             * Work through all the headers of the email with a matching name and
114:             * extract all the mail addresses as a collection of addresses.
115:             *
116:             * @param mail the mail message to read
117:             * @param name the header name as a String
118:             * @return the collection of MailAddress objects.
119:             */
120:            private Collection getHeaderMailAddresses(MimeMessage message,
121:                    String name) throws MessagingException {
122:
123:                if (isDebug) {
124:                    StringBuffer logBuffer = new StringBuffer(64).append(
125:                            "Checking ").append(name).append(" headers");
126:                    log(logBuffer.toString());
127:                }
128:                Collection addresses = new Vector();
129:                String[] headers = message.getHeader(name);
130:                String addressString;
131:                InternetAddress iAddress;
132:                if (headers != null) {
133:                    for (int i = 0; i < headers.length; i++) {
134:                        StringTokenizer st = new StringTokenizer(headers[i],
135:                                ",", false);
136:                        while (st.hasMoreTokens()) {
137:                            addressString = st.nextToken();
138:                            iAddress = new InternetAddress(addressString);
139:                            if (isDebug) {
140:                                log("Address = " + iAddress.toString());
141:                            }
142:                            addresses.add(new MailAddress(iAddress));
143:                        }
144:                    }
145:                }
146:                return addresses;
147:            }
148:
149:        }
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