mailimpl.java

java 开发的邮件服务器平台。支持以下协议。 协议可以修改为自己的专门标识

/***********************************************************************
 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
 * All rights reserved.                                                *
 * ------------------------------------------------------------------- *
 * 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.apache.james.core;

import org.apache.avalon.framework.activity.Disposable;

import org.apache.james.util.RFC2822Headers;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;

import javax.mail.Address;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.ParseException;
import java.io.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.HashMap;

/**
 * <P>Wraps a MimeMessage adding routing information (from SMTP) and some simple
 * API enhancements.</P>
 * <P>From James version > 2.2.0a8 "mail attributes" have been added.
 * Backward and forward compatibility is supported:
 * messages stored in file repositories <I>without</I> attributes by James version <= 2.2.0a8
 * will be processed by later versions as having an empty attributes hashmap;
 * messages stored in file repositories <I>with</I> attributes by James version > 2.2.0a8
 * will be processed by previous versions, ignoring the attributes.</P>
 *
 * @version CVS $Revision: 1.17.4.6 $ $Date: 2004/03/15 03:54:15 $
 */
public class MailImpl implements Disposable, Mail {
    /**
     * We hardcode the serialVersionUID so that from James 1.2 on,
     * MailImpl will be deserializable (so your mail doesn't get lost)
     */
    public static final long serialVersionUID = -4289663364703986260L;
    /**
     * The error message, if any, associated with this mail.
     */
    private String errorMessage;
    /**
     * The state of this mail, which determines how it is processed.
     */
    private String state;
    /**
     * The MimeMessage that holds the mail data.
     */
    private MimeMessage message;
    /**
     * The sender of this mail.
     */
    private MailAddress sender;
    /**
     * The collection of recipients to whom this mail was sent.
     */
    private Collection recipients;
    /**
     * The identifier for this mail message
     */
    private String name;
    /**
     * The remote host from which this mail was sent.
     */
    private String remoteHost = "localhost";
    /**
     * The remote address from which this mail was sent.
     */
    private String remoteAddr = "127.0.0.1";
    /**
     * The last time this message was updated.
     */
    private Date lastUpdated = new Date();
    /**
     * Attributes added to this MailImpl instance
     */
    private HashMap attributes;
    /**
     * A constructor that creates a new, uninitialized MailImpl
     */
    public MailImpl() {
        setState(Mail.DEFAULT);
        attributes = new HashMap();
    }
    /**
     * A constructor that creates a MailImpl with the specified name,
     * sender, and recipients.
     *
     * @param name the name of the MailImpl
     * @param sender the sender for this MailImpl
     * @param recipients the collection of recipients of this MailImpl
     */
    public MailImpl(String name, MailAddress sender, Collection recipients) {
        this();
        this.name = name;
        this.sender = sender;
        this.recipients = null;

        // Copy the recipient list
        if (recipients != null) {
            Iterator theIterator = recipients.iterator();
            this.recipients = new ArrayList();
            while (theIterator.hasNext()) {
                this.recipients.add(theIterator.next());
            }
        }
    }

    /**
     * A constructor that creates a MailImpl with the specified name,
     * sender, recipients, and message data.
     *
     * @param name the name of the MailImpl
     * @param sender the sender for this MailImpl
     * @param recipients the collection of recipients of this MailImpl
     * @param messageIn a stream containing the message source
     */
    public MailImpl(String name, MailAddress sender, Collection recipients, InputStream messageIn)
        throws MessagingException {
        this(name, sender, recipients);
        MimeMessageSource source = new MimeMessageInputStreamSource(name, messageIn);
        MimeMessageWrapper wrapper = new MimeMessageWrapper(source);
        this.setMessage(wrapper);
    }

    /**
     * A constructor that creates a MailImpl with the specified name,
     * sender, recipients, and MimeMessage.
     *
     * @param name the name of the MailImpl
     * @param sender the sender for this MailImpl
     * @param recipients the collection of recipients of this MailImpl
     * @param message the MimeMessage associated with this MailImpl
     */
    public MailImpl(String name, MailAddress sender, Collection recipients, MimeMessage message) {
        this(name, sender, recipients);
        this.setMessage(message);
    }

    /**
     * A constructor which will attempt to obtain sender and recipients from the headers of the MimeMessage supplied.
     * @param message - a MimeMessage from which to construct a Mail
     */
    public MailImpl(MimeMessage message) throws MessagingException {
        this();
        MailAddress sender = getReturnPath(message);
        Collection recipients = null;
        Address[] addresses = message.getRecipients(MimeMessage.RecipientType.TO);
        if (addresses != null) {
            recipients = new ArrayList();
            for (int i = 0; i < addresses.length; i++) {
                try {
                    recipients.add(new MailAddress(new InternetAddress(addresses[i].toString(), false)));
                } catch (ParseException pe) {
                    // RFC 2822 section 3.4 allows To: fields without <>
                    // Let's give this one more try with <>.
                    try {
                        recipients.add(new MailAddress("<" + new InternetAddress(addresses[i].toString()).toString() + ">"));
                    } catch (ParseException _) {
                        throw new MessagingException("Could not parse address: " + addresses[i].toString() + " from " + message.getHeader(RFC2822Headers.TO, ", "), pe);
                    }
                }
            }
        }
        this.name = message.toString();
        this.sender = sender;
        this.recipients = recipients;
        this.setMessage(message);
    }
    /**
     * Gets the MailAddress corresponding to the existing "Return-Path" of
     * <I>message</I>.
     * If missing or empty returns <CODE>null</CODE>,
     */
    private MailAddress getReturnPath(MimeMessage message) throws MessagingException {
        MailAddress mailAddress = null;
        String[] returnPathHeaders = message.getHeader(RFC2822Headers.RETURN_PATH);
        String returnPathHeader = null;
        if (returnPathHeaders != null) {
            returnPathHeader = returnPathHeaders[0];
            if (returnPathHeader != null) {
                returnPathHeader = returnPathHeader.trim();
                if (!returnPathHeader.equals("<>")) {
                    try {
                        mailAddress = new MailAddress(new InternetAddress(returnPathHeader, false));
                    } catch (ParseException pe) {
                        throw new MessagingException("Could not parse address: " + returnPathHeader + " from " + message.getHeader(RFC2822Headers.RETURN_PATH, ", "), pe);
                    }
                }
            }
        }
        return mailAddress;
    }
    /**
     * Duplicate the MailImpl.
     *
     * @return a MailImpl that is a duplicate of this one
     */
    public Mail duplicate() {
        return duplicate(name);
    }
    /**
     * Duplicate the MailImpl, replacing the mail name with the one
     * passed in as an argument.
     *
     * @param newName the name for the duplicated mail
     *
     * @return a MailImpl that is a duplicate of this one with a different name
     */
    public Mail duplicate(String newName) {
        try {
            MailImpl newMail = new MailImpl(newName, sender, recipients, getMessage());
            newMail.setRemoteHost(remoteHost);
            newMail.setRemoteAddr(remoteAddr);
            newMail.setLastUpdated(lastUpdated);
            newMail.setAttributesRaw((HashMap) attributes.clone());
            return newMail;
        } catch (MessagingException me) {
            // Ignored.  Return null in the case of an error.
        }
        return (Mail) null;
    }
    /**
     * Get the error message associated with this MailImpl.
     *
     * @return the error message associated with this MailImpl
     */
    public String getErrorMessage() {
        return errorMessage;
    }
    /**
     * Get the MimeMessage associated with this MailImpl.
     *
     * @return the MimeMessage associated with this MailImpl
     */
    public MimeMessage getMessage() throws MessagingException {
        return message;
    }
    /**
     * Set the name of this MailImpl.
     *
     * @param name the name of this MailImpl
     */
    public void setName(String name) {
        this.name = name;
    }
    /**
     * Get the name of this MailImpl.
     *
     * @return the name of this MailImpl
     */
    public String getName() {
        return name;
    }
    /**
     * Get the recipients of this MailImpl.
     *
     * @return the recipients of this MailImpl
     */
    public Collection getRecipients() {
        return recipients;
    }
    /**
     * Get the sender of this MailImpl.
     *
     * @return the sender of this MailImpl
     */
    public MailAddress getSender() {
        return sender;
    }
    /**
     * Get the state of this MailImpl.
     *
     * @return the state of this MailImpl
     */
    public String getState() {
        return state;
    }
    /**
     * Get the remote host associated with this MailImpl.
     *
     * @return the remote host associated with this MailImpl
     */
    public String getRemoteHost() {
        return remoteHost;
    }
    /**
     * Get the remote address associated with this MailImpl.
     *
     * @return the remote address associated with this MailImpl
     */
    public String getRemoteAddr() {
        return remoteAddr;
    }
    /**
     * Get the last updated time for this MailImpl.
     *
     * @return the last updated time for this MailImpl
     */