ohair@286: /*
ohair@286:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
ohair@286:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286:  *
ohair@286:  * This code is free software; you can redistribute it and/or modify it
ohair@286:  * under the terms of the GNU General Public License version 2 only, as
ohair@286:  * published by the Free Software Foundation.  Oracle designates this
ohair@286:  * particular file as subject to the "Classpath" exception as provided
ohair@286:  * by Oracle in the LICENSE file that accompanied this code.
ohair@286:  *
ohair@286:  * This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ohair@286:  * version 2 for more details (a copy is included in the LICENSE file that
ohair@286:  * accompanied this code).
ohair@286:  *
ohair@286:  * You should have received a copy of the GNU General Public License version
ohair@286:  * 2 along with this work; if not, write to the Free Software Foundation,
ohair@286:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286:  *
ohair@286:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286:  * or visit www.oracle.com if you need additional information or have any
ohair@286:  * questions.
ohair@286:  */
ohair@286: 
ohair@286: package com.sun.xml.internal.org.jvnet.mimepull;
ohair@286: 
ohair@286: import java.io.IOException;
ohair@286: import java.io.InputStream;
ohair@286: import java.io.UnsupportedEncodingException;
ohair@286: import java.net.URLDecoder;
ohair@286: import java.nio.ByteBuffer;
ohair@286: import java.util.*;
ohair@286: import java.util.logging.Logger;
ohair@286: 
ohair@286: /**
ohair@286:  * Represents MIME message. MIME message parsing is done lazily using a
ohair@286:  * pull parser.
ohair@286:  *
ohair@286:  * @author Jitendra Kotamraju
ohair@286:  */
ohair@286: public class MIMEMessage {
ohair@286:     private static final Logger LOGGER = Logger.getLogger(MIMEMessage.class.getName());
ohair@286: 
ohair@286:     MIMEConfig config;
ohair@286: 
ohair@286:     private final InputStream in;
ohair@286:     private final List<MIMEPart> partsList;
ohair@286:     private final Map<String, MIMEPart> partsMap;
ohair@286:     private final Iterator<MIMEEvent> it;
ohair@286:     private boolean parsed;     // true when entire message is parsed
ohair@286:     private MIMEPart currentPart;
ohair@286:     private int currentIndex;
ohair@286: 
ohair@286:     /**
ohair@286:      * @see MIMEMessage(InputStream, String, MIMEConfig)
ohair@286:      */
ohair@286:     public MIMEMessage(InputStream in, String boundary) {
ohair@286:         this(in, boundary, new MIMEConfig());
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * Creates a MIME message from the content's stream. The content stream
ohair@286:      * is closed when EOF is reached.
ohair@286:      *
ohair@286:      * @param in MIME message stream
ohair@286:      * @param boundary the separator for parts(pass it without --)
ohair@286:      * @param config various configuration parameters
ohair@286:      */
ohair@286:     public MIMEMessage(InputStream in, String boundary, MIMEConfig config) {
ohair@286:         this.in = in;
ohair@286:         this.config = config;
ohair@286:         MIMEParser parser = new MIMEParser(in, boundary, config);
ohair@286:         it = parser.iterator();
ohair@286: 
ohair@286:         partsList = new ArrayList<MIMEPart>();
ohair@286:         partsMap = new HashMap<String, MIMEPart>();
ohair@286:         if (config.isParseEagerly()) {
ohair@286:             parseAll();
ohair@286:         }
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * Gets all the attachments by parsing the entire MIME message. Avoid
ohair@286:      * this if possible since it is an expensive operation.
ohair@286:      *
ohair@286:      * @return list of attachments.
ohair@286:      */
ohair@286:     public List<MIMEPart> getAttachments() {
ohair@286:         if (!parsed) {
ohair@286:             parseAll();
ohair@286:         }
ohair@286:         return partsList;
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * Creates nth attachment lazily. It doesn't validate
ohair@286:      * if the message has so many attachments. To
ohair@286:      * do the validation, the message needs to be parsed.
ohair@286:      * The parsing of the message is done lazily and is done
ohair@286:      * while reading the bytes of the part.
ohair@286:      *
ohair@286:      * @param index sequential order of the part. starts with zero.
ohair@286:      * @return attachemnt part
ohair@286:      */
ohair@286:     public MIMEPart getPart(int index) {
ohair@286:         LOGGER.fine("index="+index);
ohair@286:         MIMEPart part = (index < partsList.size()) ? partsList.get(index) : null;
ohair@286:         if (parsed && part == null) {
ohair@286:             throw new MIMEParsingException("There is no "+index+" attachment part ");
ohair@286:         }
ohair@286:         if (part == null) {
ohair@286:             // Parsing will done lazily and will be driven by reading the part
ohair@286:             part = new MIMEPart(this);
ohair@286:             partsList.add(index, part);
ohair@286:         }
ohair@286:         LOGGER.fine("Got attachment at index="+index+" attachment="+part);
ohair@286:         return part;
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * Creates a lazy attachment for a given Content-ID. It doesn't validate
ohair@286:      * if the message contains an attachment with the given Content-ID. To
ohair@286:      * do the validation, the message needs to be parsed. The parsing of the
ohair@286:      * message is done lazily and is done while reading the bytes of the part.
ohair@286:      *
ohair@286:      * @param contentId Content-ID of the part, expects Content-ID without <, >
ohair@286:      * @return attachemnt part
ohair@286:      */
ohair@286:     public MIMEPart getPart(String contentId) {
ohair@286:         LOGGER.fine("Content-ID="+contentId);
ohair@286:         MIMEPart part = getDecodedCidPart(contentId);
ohair@286:         if (parsed && part == null) {
ohair@286:             throw new MIMEParsingException("There is no attachment part with Content-ID = "+contentId);
ohair@286:         }
ohair@286:         if (part == null) {
ohair@286:             // Parsing is done lazily and is driven by reading the part
ohair@286:             part = new MIMEPart(this, contentId);
ohair@286:             partsMap.put(contentId, part);
ohair@286:         }
ohair@286:         LOGGER.fine("Got attachment for Content-ID="+contentId+" attachment="+part);
ohair@286:         return part;
ohair@286:     }
ohair@286: 
ohair@286:     // this is required for Indigo interop, it writes content-id without escaping
ohair@286:     private MIMEPart getDecodedCidPart(String cid) {
ohair@286:         MIMEPart part = partsMap.get(cid);
ohair@286:         if (part == null) {
ohair@286:             if (cid.indexOf('%') != -1) {
ohair@286:                 try {
ohair@286:                     String tempCid = URLDecoder.decode(cid, "utf-8");
ohair@286:                     part = partsMap.get(tempCid);
ohair@286:                 } catch(UnsupportedEncodingException ue) {
ohair@286:                     // Ignore it
ohair@286:                 }
ohair@286:             }
ohair@286:         }
ohair@286:         return part;
ohair@286:     }
ohair@286: 
ohair@286: 
ohair@286:     /**
ohair@286:      * Parses the whole MIME message eagerly
ohair@286:      */
ohair@286:     public void parseAll() {
ohair@286:         while(makeProgress()) {
ohair@286:             // Nothing to do
ohair@286:         }
ohair@286:     }
ohair@286: 
ohair@286: 
ohair@286:     /**
ohair@286:      * Parses the MIME message in a pull fashion.
ohair@286:      *
ohair@286:      * @return
ohair@286:      *      false if the parsing is completed.
ohair@286:      */
ohair@286:     public synchronized boolean makeProgress() {
ohair@286:         if (!it.hasNext()) {
ohair@286:             return false;
ohair@286:         }
ohair@286: 
ohair@286:         MIMEEvent event = it.next();
ohair@286: 
ohair@286:         switch(event.getEventType()) {
ohair@286:             case START_MESSAGE :
ohair@286:                 LOGGER.fine("MIMEEvent="+MIMEEvent.EVENT_TYPE.START_MESSAGE);
ohair@286:                 break;
ohair@286: 
ohair@286:             case START_PART :
ohair@286:                 LOGGER.fine("MIMEEvent="+MIMEEvent.EVENT_TYPE.START_PART);
ohair@286:                 break;
ohair@286: 
ohair@286:             case HEADERS :
ohair@286:                 LOGGER.fine("MIMEEvent="+MIMEEvent.EVENT_TYPE.HEADERS);
ohair@286:                 MIMEEvent.Headers headers = (MIMEEvent.Headers)event;
ohair@286:                 InternetHeaders ih = headers.getHeaders();
ohair@286:                 List<String> cids = ih.getHeader("content-id");
ohair@286:                 String cid = (cids != null) ? cids.get(0) : currentIndex+"";
ohair@286:                 if (cid.length() > 2 && cid.charAt(0)=='<') {
ohair@286:                     cid = cid.substring(1,cid.length()-1);
ohair@286:                 }
ohair@286:                 MIMEPart listPart = (currentIndex < partsList.size()) ? partsList.get(currentIndex) : null;
ohair@286:                 MIMEPart mapPart = getDecodedCidPart(cid);
ohair@286:                 if (listPart == null && mapPart == null) {
ohair@286:                     currentPart = getPart(cid);
ohair@286:                     partsList.add(currentIndex, currentPart);
ohair@286:                 } else if (listPart == null) {
ohair@286:                     currentPart = mapPart;
ohair@286:                     partsList.add(currentIndex, mapPart);
ohair@286:                 } else if (mapPart == null) {
ohair@286:                     currentPart = listPart;
ohair@286:                     currentPart.setContentId(cid);
ohair@286:                     partsMap.put(cid, currentPart);
ohair@286:                 } else if (listPart != mapPart) {
ohair@286:                     throw new MIMEParsingException("Created two different attachments using Content-ID and index");
ohair@286:                 }
ohair@286:                 currentPart.setHeaders(ih);
ohair@286:                 break;
ohair@286: 
ohair@286:             case CONTENT :
ohair@286:                 LOGGER.finer("MIMEEvent="+MIMEEvent.EVENT_TYPE.CONTENT);
ohair@286:                 MIMEEvent.Content content = (MIMEEvent.Content)event;
ohair@286:                 ByteBuffer buf = content.getData();
ohair@286:                 currentPart.addBody(buf);
ohair@286:                 break;
ohair@286: 
ohair@286:             case END_PART :
ohair@286:                 LOGGER.fine("MIMEEvent="+MIMEEvent.EVENT_TYPE.END_PART);
ohair@286:                 currentPart.doneParsing();
ohair@286:                 ++currentIndex;
ohair@286:                 break;
ohair@286: 
ohair@286:             case END_MESSAGE :
ohair@286:                 LOGGER.fine("MIMEEvent="+MIMEEvent.EVENT_TYPE.END_MESSAGE);
ohair@286:                 parsed = true;
ohair@286:                 try {
ohair@286:                     in.close();
ohair@286:                 } catch(IOException ioe) {
ohair@286:                     throw new MIMEParsingException(ioe);
ohair@286:                 }
ohair@286:                 break;
ohair@286: 
ohair@286:             default :
ohair@286:                 throw new MIMEParsingException("Unknown Parser state = "+event.getEventType());
ohair@286:         }
ohair@286:         return true;
ohair@286:     }
ohair@286: }