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455 lines
12 KiB
455 lines
12 KiB
/*
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* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Eclipse Public License v. 2.0, which is available at
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* http://www.eclipse.org/legal/epl-2.0.
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*
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* This Source Code may also be made available under the following Secondary
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* Licenses when the conditions for such availability set forth in the
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* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
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* version 2 with the GNU Classpath Exception, which is available at
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* https://www.gnu.org/software/classpath/license.html.
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*
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* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
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*/
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package com.sun.mail.imap;
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import java.io.*;
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import java.util.Enumeration;
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import javax.mail.*;
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import javax.mail.internet.*;
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import javax.activation.*;
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import com.sun.mail.util.PropUtil;
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import com.sun.mail.util.ReadableMime;
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import com.sun.mail.util.LineOutputStream;
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import com.sun.mail.util.SharedByteArrayOutputStream;
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import com.sun.mail.iap.*;
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import com.sun.mail.imap.protocol.*;
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/**
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* An IMAP body part.
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*
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* @author John Mani
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* @author Bill Shannon
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*/
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public class IMAPBodyPart extends MimeBodyPart implements ReadableMime {
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private IMAPMessage message;
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private BODYSTRUCTURE bs;
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private String sectionId;
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// processed values ..
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private String type;
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private String description;
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private boolean headersLoaded = false;
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private static final boolean decodeFileName =
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PropUtil.getBooleanSystemProperty("mail.mime.decodefilename", false);
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protected IMAPBodyPart(BODYSTRUCTURE bs, String sid, IMAPMessage message) {
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super();
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this.bs = bs;
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this.sectionId = sid;
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this.message = message;
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// generate content-type
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ContentType ct = new ContentType(bs.type, bs.subtype, bs.cParams);
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type = ct.toString();
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}
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/* Override this method to make it a no-op, rather than throw
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* an IllegalWriteException. This will permit IMAPBodyParts to
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* be inserted in newly crafted MimeMessages, especially when
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* forwarding or replying to messages.
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*/
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@Override
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protected void updateHeaders() {
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return;
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}
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@Override
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public int getSize() throws MessagingException {
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return bs.size;
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}
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@Override
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public int getLineCount() throws MessagingException {
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return bs.lines;
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}
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@Override
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public String getContentType() throws MessagingException {
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return type;
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}
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@Override
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public String getDisposition() throws MessagingException {
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return bs.disposition;
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}
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@Override
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public void setDisposition(String disposition) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public String getEncoding() throws MessagingException {
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return bs.encoding;
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}
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@Override
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public String getContentID() throws MessagingException {
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return bs.id;
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}
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@Override
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public String getContentMD5() throws MessagingException {
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return bs.md5;
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}
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@Override
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public void setContentMD5(String md5) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public String getDescription() throws MessagingException {
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if (description != null) // cached value ?
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return description;
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if (bs.description == null)
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return null;
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try {
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description = MimeUtility.decodeText(bs.description);
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} catch (UnsupportedEncodingException ex) {
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description = bs.description;
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}
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return description;
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}
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@Override
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public void setDescription(String description, String charset)
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throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public String getFileName() throws MessagingException {
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String filename = null;
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if (bs.dParams != null)
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filename = bs.dParams.get("filename");
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if ((filename == null || filename.isEmpty()) && bs.cParams != null)
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filename = bs.cParams.get("name");
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if (decodeFileName && filename != null) {
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try {
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filename = MimeUtility.decodeText(filename);
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} catch (UnsupportedEncodingException ex) {
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throw new MessagingException("Can't decode filename", ex);
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}
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}
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return filename;
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}
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@Override
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public void setFileName(String filename) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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protected InputStream getContentStream() throws MessagingException {
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InputStream is = null;
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boolean pk = message.getPeek(); // acquire outside of message cache lock
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// Acquire MessageCacheLock, to freeze seqnum.
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synchronized(message.getMessageCacheLock()) {
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try {
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IMAPProtocol p = message.getProtocol();
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// Check whether this message is expunged
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message.checkExpunged();
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if (p.isREV1() && (message.getFetchBlockSize() != -1))
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return new IMAPInputStream(message, sectionId,
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message.ignoreBodyStructureSize() ? -1 : bs.size, pk);
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// Else, vanila IMAP4, no partial fetch
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int seqnum = message.getSequenceNumber();
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BODY b;
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if (pk)
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b = p.peekBody(seqnum, sectionId);
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else
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b = p.fetchBody(seqnum, sectionId);
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if (b != null)
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is = b.getByteArrayInputStream();
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} catch (ConnectionException cex) {
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throw new FolderClosedException(
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message.getFolder(), cex.getMessage());
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} catch (ProtocolException pex) {
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throw new MessagingException(pex.getMessage(), pex);
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}
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}
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if (is == null) {
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message.forceCheckExpunged(); // may throw MessageRemovedException
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// nope, the server doesn't think it's expunged.
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// can't tell the difference between the server returning NIL
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// and some other error that caused null to be returned above,
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// so we'll just assume it was empty content.
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is = new ByteArrayInputStream(new byte[0]);
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}
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return is;
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}
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/**
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* Return the MIME format stream of headers for this body part.
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*/
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private InputStream getHeaderStream() throws MessagingException {
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if (!message.isREV1())
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loadHeaders(); // will be needed below
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// Acquire MessageCacheLock, to freeze seqnum.
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synchronized(message.getMessageCacheLock()) {
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try {
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IMAPProtocol p = message.getProtocol();
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// Check whether this message got expunged
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message.checkExpunged();
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if (p.isREV1()) {
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int seqnum = message.getSequenceNumber();
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BODY b = p.peekBody(seqnum, sectionId + ".MIME");
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if (b == null)
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throw new MessagingException("Failed to fetch headers");
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ByteArrayInputStream bis = b.getByteArrayInputStream();
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if (bis == null)
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throw new MessagingException("Failed to fetch headers");
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return bis;
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} else {
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// Can't read it from server, have to fake it
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SharedByteArrayOutputStream bos =
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new SharedByteArrayOutputStream(0);
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LineOutputStream los = new LineOutputStream(bos);
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try {
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// Write out the header
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Enumeration<String> hdrLines
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= super.getAllHeaderLines();
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while (hdrLines.hasMoreElements())
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los.writeln(hdrLines.nextElement());
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// The CRLF separator between header and content
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los.writeln();
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} catch (IOException ioex) {
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// should never happen
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} finally {
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try {
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los.close();
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} catch (IOException cex) { }
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}
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return bos.toStream();
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}
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} catch (ConnectionException cex) {
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throw new FolderClosedException(
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message.getFolder(), cex.getMessage());
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} catch (ProtocolException pex) {
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throw new MessagingException(pex.getMessage(), pex);
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}
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}
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}
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/**
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* Return the MIME format stream corresponding to this message part.
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*
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* @return the MIME format stream
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* @since JavaMail 1.4.5
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*/
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@Override
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public InputStream getMimeStream() throws MessagingException {
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/*
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* The IMAP protocol doesn't support returning the entire
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* part content in one operation so we have to fake it by
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* concatenating the header stream and the content stream.
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*/
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return new SequenceInputStream(getHeaderStream(), getContentStream());
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}
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@Override
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public synchronized DataHandler getDataHandler()
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throws MessagingException {
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if (dh == null) {
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if (bs.isMulti())
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dh = new DataHandler(
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new IMAPMultipartDataSource(
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this, bs.bodies, sectionId, message)
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);
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else if (bs.isNested() && message.isREV1() && bs.envelope != null)
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dh = new DataHandler(
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new IMAPNestedMessage(message,
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bs.bodies[0],
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bs.envelope,
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sectionId),
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type
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);
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}
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return super.getDataHandler();
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}
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@Override
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public void setDataHandler(DataHandler content) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public void setContent(Object o, String type) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public void setContent(Multipart mp) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public String[] getHeader(String name) throws MessagingException {
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loadHeaders();
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return super.getHeader(name);
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}
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@Override
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public void setHeader(String name, String value)
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throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public void addHeader(String name, String value)
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throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public void removeHeader(String name) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public Enumeration<Header> getAllHeaders() throws MessagingException {
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loadHeaders();
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return super.getAllHeaders();
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}
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@Override
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public Enumeration<Header> getMatchingHeaders(String[] names)
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throws MessagingException {
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loadHeaders();
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return super.getMatchingHeaders(names);
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}
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@Override
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public Enumeration<Header> getNonMatchingHeaders(String[] names)
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throws MessagingException {
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loadHeaders();
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return super.getNonMatchingHeaders(names);
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}
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@Override
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public void addHeaderLine(String line) throws MessagingException {
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throw new IllegalWriteException("IMAPBodyPart is read-only");
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}
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@Override
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public Enumeration<String> getAllHeaderLines() throws MessagingException {
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loadHeaders();
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return super.getAllHeaderLines();
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}
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@Override
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public Enumeration<String> getMatchingHeaderLines(String[] names)
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throws MessagingException {
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loadHeaders();
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return super.getMatchingHeaderLines(names);
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}
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@Override
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public Enumeration<String> getNonMatchingHeaderLines(String[] names)
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throws MessagingException {
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loadHeaders();
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return super.getNonMatchingHeaderLines(names);
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}
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private synchronized void loadHeaders() throws MessagingException {
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if (headersLoaded)
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return;
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// "headers" should never be null since it's set in the constructor.
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// If something did go wrong this will fix it, but is an unsynchronized
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// assignment of "headers".
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if (headers == null)
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headers = new InternetHeaders();
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// load headers
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// Acquire MessageCacheLock, to freeze seqnum.
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synchronized(message.getMessageCacheLock()) {
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try {
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IMAPProtocol p = message.getProtocol();
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// Check whether this message got expunged
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message.checkExpunged();
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if (p.isREV1()) {
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int seqnum = message.getSequenceNumber();
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BODY b = p.peekBody(seqnum, sectionId + ".MIME");
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if (b == null)
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throw new MessagingException("Failed to fetch headers");
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ByteArrayInputStream bis = b.getByteArrayInputStream();
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if (bis == null)
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throw new MessagingException("Failed to fetch headers");
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headers.load(bis);
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} else {
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// RFC 1730 does not provide for fetching BodyPart headers
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// So, just dump the RFC1730 BODYSTRUCTURE into the
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// headerStore
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// Content-Type
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headers.addHeader("Content-Type", type);
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// Content-Transfer-Encoding
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headers.addHeader("Content-Transfer-Encoding", bs.encoding);
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// Content-Description
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if (bs.description != null)
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headers.addHeader("Content-Description",
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bs.description);
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// Content-ID
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if (bs.id != null)
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headers.addHeader("Content-ID", bs.id);
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// Content-MD5
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if (bs.md5 != null)
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headers.addHeader("Content-MD5", bs.md5);
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}
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} catch (ConnectionException cex) {
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throw new FolderClosedException(
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message.getFolder(), cex.getMessage());
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} catch (ProtocolException pex) {
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throw new MessagingException(pex.getMessage(), pex);
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}
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}
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headersLoaded = true;
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}
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}
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