org.eclipse.angus.mail.imap.IMAPMessage Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2023 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.eclipse.angus.mail.imap;
import jakarta.activation.DataHandler;
import jakarta.mail.Address;
import jakarta.mail.FetchProfile;
import jakarta.mail.Flags;
import jakarta.mail.FolderClosedException;
import jakarta.mail.Header;
import jakarta.mail.IllegalWriteException;
import jakarta.mail.Message;
import jakarta.mail.MessageRemovedException;
import jakarta.mail.MessagingException;
import jakarta.mail.Session;
import jakarta.mail.UIDFolder;
import jakarta.mail.internet.ContentType;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.InternetHeaders;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeUtility;
import org.eclipse.angus.mail.iap.ConnectionException;
import org.eclipse.angus.mail.iap.ProtocolException;
import org.eclipse.angus.mail.iap.Response;
import org.eclipse.angus.mail.imap.protocol.BODY;
import org.eclipse.angus.mail.imap.protocol.BODYSTRUCTURE;
import org.eclipse.angus.mail.imap.protocol.ENVELOPE;
import org.eclipse.angus.mail.imap.protocol.FetchItem;
import org.eclipse.angus.mail.imap.protocol.FetchResponse;
import org.eclipse.angus.mail.imap.protocol.IMAPProtocol;
import org.eclipse.angus.mail.imap.protocol.INTERNALDATE;
import org.eclipse.angus.mail.imap.protocol.Item;
import org.eclipse.angus.mail.imap.protocol.MODSEQ;
import org.eclipse.angus.mail.imap.protocol.RFC822DATA;
import org.eclipse.angus.mail.imap.protocol.RFC822SIZE;
import org.eclipse.angus.mail.imap.protocol.UID;
import org.eclipse.angus.mail.util.ReadableMime;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
/**
* This class implements an IMAPMessage object.
*
* An IMAPMessage object starts out as a light-weight object. It gets
* filled-in incrementally when a request is made for some item. Or
* when a prefetch is done using the FetchProfile.
*
* An IMAPMessage has a messageNumber and a sequenceNumber. The
* messageNumber is its index into its containing folder's messageCache.
* The sequenceNumber is its IMAP sequence-number.
*
* @author John Mani
* @author Bill Shannon
*/
/*
* The lock hierarchy is that the lock on the IMAPMessage object, if
* it's acquired at all, must be acquired before the message cache lock.
* The IMAPMessage lock protects the message flags, sort of.
*
* XXX - I'm not convinced that all fields of IMAPMessage are properly
* protected by locks.
*/
public class IMAPMessage extends MimeMessage implements ReadableMime {
protected BODYSTRUCTURE bs; // BODYSTRUCTURE
protected ENVELOPE envelope; // ENVELOPE
/**
* A map of the extension FETCH items. In addition to saving the
* data in this map, an entry in this map indicates that we *have*
* the data, and so it doesn't need to be fetched again. The map
* is created only when needed, to avoid significantly increasing
* the effective size of an IMAPMessage object.
*
* @since JavaMail 1.4.6
*/
protected Map items; // Map
private Date receivedDate; // INTERNALDATE
private long size = -1; // RFC822.SIZE
private Boolean peek; // use BODY.PEEK when fetching content?
// this message's IMAP UID
private volatile long uid = -1;
// this message's IMAP MODSEQ - RFC 4551 CONDSTORE
private volatile long modseq = -1;
// this message's IMAP sectionId (null for toplevel message,
// non-null for a nested message)
protected String sectionId;
// processed values
private String type; // Content-Type (with params)
private String subject; // decoded (Unicode) subject
private String description; // decoded (Unicode) desc
// Indicates that we've loaded *all* headers for this message
private volatile boolean headersLoaded = false;
// Indicates that we've cached the body of this message
private volatile boolean bodyLoaded = false;
/* Hashtable of names of headers we've loaded from the server.
* Used in isHeaderLoaded() and getHeaderLoaded() to keep track
* of those headers we've attempted to load from the server. We
* need this table of names to avoid multiple attempts at loading
* headers that don't exist for a particular message.
*
* Could this somehow be included in the InternetHeaders object ??
*/
private Hashtable loadedHeaders
= new Hashtable<>(1);
// This is our Envelope
static final String EnvelopeCmd = "ENVELOPE INTERNALDATE RFC822.SIZE";
/**
* Constructor.
*
* @param folder the folder containing this message
* @param msgnum the message sequence number
*/
protected IMAPMessage(IMAPFolder folder, int msgnum) {
super(folder, msgnum);
flags = null;
}
/**
* Constructor, for use by IMAPNestedMessage.
*
* @param session the Session
*/
protected IMAPMessage(Session session) {
super(session);
}
/**
* Get this message's folder's protocol connection.
* Throws FolderClosedException, if the protocol connection
* is not available.
*
* ASSERT: Must hold the messageCacheLock.
*
* @throws ProtocolException for protocol errors
* @return the IMAPProtocol object for the containing folder
* @exception FolderClosedException if the folder is closed
*/
protected IMAPProtocol getProtocol()
throws ProtocolException, FolderClosedException {
((IMAPFolder) folder).waitIfIdle();
IMAPProtocol p = ((IMAPFolder) folder).protocol;
if (p == null)
throw new FolderClosedException(folder);
else
return p;
}
/*
* Is this an IMAP4 REV1 server?
*/
protected boolean isREV1() throws FolderClosedException {
// access the folder's protocol object without waiting
// for IDLE to complete
IMAPProtocol p = ((IMAPFolder) folder).protocol;
if (p == null)
throw new FolderClosedException(folder);
else
return p.isREV1();
}
/**
* Get the messageCacheLock, associated with this Message's
* Folder.
*
* @return the message cache lock object
*/
protected Object getMessageCacheLock() {
return ((IMAPFolder) folder).messageCacheLock;
}
/**
* Get this message's IMAP sequence number.
*
* ASSERT: This method must be called only when holding the
* messageCacheLock.
*
* @return the message sequence number
*/
protected int getSequenceNumber() {
return ((IMAPFolder) folder).messageCache.seqnumOf(getMessageNumber());
}
/**
* Wrapper around the protected method Message.setMessageNumber() to
* make that method accessible to IMAPFolder.
*/
@Override
protected void setMessageNumber(int msgnum) {
super.setMessageNumber(msgnum);
}
/**
* Return the UID for this message.
* Returns -1 if not known; use UIDFolder.getUID() in this case.
*
* @return the UID
* @see jakarta.mail.UIDFolder#getUID
*/
protected long getUID() {
return uid;
}
protected void setUID(long uid) {
this.uid = uid;
}
/**
* Return the modification sequence number (MODSEQ) for this message.
* Returns -1 if not known.
*
* @return the modification sequence number
* @exception MessagingException for failures
* @see "RFC 4551"
* @since JavaMail 1.5.1
*/
public synchronized long getModSeq() throws MessagingException {
if (modseq != -1)
return modseq;
synchronized (getMessageCacheLock()) { // Acquire Lock
try {
IMAPProtocol p = getProtocol();
checkExpunged(); // insure that message is not expunged
MODSEQ ms = p.fetchMODSEQ(getSequenceNumber());
if (ms != null)
modseq = ms.modseq;
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
throw new MessagingException(pex.getMessage(), pex);
}
}
return modseq;
}
long _getModSeq() {
return modseq;
}
void setModSeq(long modseq) {
this.modseq = modseq;
}
// expose to MessageCache
@Override
protected void setExpunged(boolean set) {
super.setExpunged(set);
}
// Convenience routine
protected void checkExpunged() throws MessageRemovedException {
if (expunged)
throw new MessageRemovedException();
}
/**
* Do a NOOP to force any untagged EXPUNGE responses
* and then check if this message is expunged.
*
* @exception MessageRemovedException if the message has been removed
* @exception FolderClosedException if the folder has been closed
*/
protected void forceCheckExpunged()
throws MessageRemovedException, FolderClosedException {
synchronized (getMessageCacheLock()) {
try {
getProtocol().noop();
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
// ignore it
}
}
if (expunged)
throw new MessageRemovedException();
}
// Return the block size for FETCH requests
// MUST be overridden by IMAPNestedMessage
protected int getFetchBlockSize() {
return ((IMAPStore) folder.getStore()).getFetchBlockSize();
}
// Should we ignore the size in the BODYSTRUCTURE?
// MUST be overridden by IMAPNestedMessage
protected boolean ignoreBodyStructureSize() {
return ((IMAPStore) folder.getStore()).ignoreBodyStructureSize();
}
/**
* Get the "From" attribute.
*/
@Override
public Address[] getFrom() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getFrom();
loadEnvelope();
InternetAddress[] a = envelope.from;
/*
* Per RFC 2822, the From header is required, and thus the IMAP
* spec also requires that it be present, but we know that in
* practice it is often missing. Some servers fill in the
* From field with the Sender field in this case, but at least
* Exchange 2007 does not. Use the same fallback strategy used
* by MimeMessage.
*/
if (a == null || a.length == 0)
a = envelope.sender;
return aaclone(a);
}
@Override
public void setFrom(Address address) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
@Override
public void addFrom(Address[] addresses) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the "Sender" attribute.
*/
@Override
public Address getSender() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getSender();
loadEnvelope();
if (envelope.sender != null && envelope.sender.length > 0)
return (envelope.sender)[0]; // there can be only one sender
else
return null;
}
@Override
public void setSender(Address address) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the desired Recipient type.
*/
@Override
public Address[] getRecipients(Message.RecipientType type)
throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getRecipients(type);
loadEnvelope();
if (type == Message.RecipientType.TO)
return aaclone(envelope.to);
else if (type == Message.RecipientType.CC)
return aaclone(envelope.cc);
else if (type == Message.RecipientType.BCC)
return aaclone(envelope.bcc);
else
return super.getRecipients(type);
}
@Override
public void setRecipients(Message.RecipientType type, Address[] addresses)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
@Override
public void addRecipients(Message.RecipientType type, Address[] addresses)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the ReplyTo addresses.
*/
@Override
public Address[] getReplyTo() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getReplyTo();
loadEnvelope();
/*
* The IMAP spec requires that the Reply-To field never be
* null, but at least Exchange 2007 fails to fill it in in
* some cases. Use the same fallback strategy used by
* MimeMessage.
*/
if (envelope.replyTo == null || envelope.replyTo.length == 0)
return getFrom();
return aaclone(envelope.replyTo);
}
@Override
public void setReplyTo(Address[] addresses) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the decoded subject.
*/
@Override
public String getSubject() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getSubject();
if (subject != null) // already cached ?
return subject;
loadEnvelope();
if (envelope.subject == null) // no subject
return null;
// Cache and return the decoded value.
try {
// The server *should* unfold the value, but just in case it
// doesn't we unfold it here.
subject =
MimeUtility.decodeText(MimeUtility.unfold(envelope.subject));
} catch (UnsupportedEncodingException ex) {
subject = envelope.subject;
}
return subject;
}
@Override
public void setSubject(String subject, String charset)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the SentDate.
*/
@Override
public Date getSentDate() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getSentDate();
loadEnvelope();
if (envelope.date == null)
return null;
else
return new Date(envelope.date.getTime());
}
@Override
public void setSentDate(Date d) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the received date (INTERNALDATE).
*/
@Override
public Date getReceivedDate() throws MessagingException {
checkExpunged();
if (receivedDate == null)
loadEnvelope(); // have to go to the server for this
if (receivedDate == null)
return null;
else
return new Date(receivedDate.getTime());
}
/**
* Get the message size.
*
* Note that this returns RFC822.SIZE. That is, it's the
* size of the whole message, header and body included.
* Note also that if the size of the message is greater than
* Integer.MAX_VALUE (2GB), this method returns Integer.MAX_VALUE.
*/
@Override
public int getSize() throws MessagingException {
checkExpunged();
// if bodyLoaded, size is already set
if (size == -1)
loadEnvelope(); // XXX - could just fetch the size
if (size > Integer.MAX_VALUE)
return Integer.MAX_VALUE; // the best we can do...
else
return (int) size;
}
/**
* Get the message size as a long.
*
* Suitable for messages that might be larger than 2GB.
*
* @return the message size as a long integer
* @exception MessagingException for failures
* @since JavaMail 1.6
*/
public long getSizeLong() throws MessagingException {
checkExpunged();
// if bodyLoaded, size is already set
if (size == -1)
loadEnvelope(); // XXX - could just fetch the size
return size;
}
/**
* Get the total number of lines.
*
* Returns the "body_fld_lines" field from the
* BODYSTRUCTURE. Note that this field is available
* only for text/plain and message/rfc822 types
*/
@Override
public int getLineCount() throws MessagingException {
checkExpunged();
// XXX - superclass doesn't implement this
loadBODYSTRUCTURE();
return bs.lines;
}
/**
* Get the content language.
*/
@Override
public String[] getContentLanguage() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getContentLanguage();
loadBODYSTRUCTURE();
if (bs.language != null)
return bs.language.clone();
else
return null;
}
@Override
public void setContentLanguage(String[] languages)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the In-Reply-To header.
*
* @return the In-Reply-To header
* @exception MessagingException for failures
* @since JavaMail 1.3.3
*/
public String getInReplyTo() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getHeader("In-Reply-To", " ");
loadEnvelope();
return envelope.inReplyTo;
}
/**
* Get the Content-Type.
*
* Generate this header from the BODYSTRUCTURE. Append parameters
* as well.
*/
@Override
public synchronized String getContentType() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getContentType();
// If we haven't cached the type yet ..
if (type == null) {
loadBODYSTRUCTURE();
// generate content-type from BODYSTRUCTURE
ContentType ct = new ContentType(bs.type, bs.subtype, bs.cParams);
type = ct.toString();
}
return type;
}
/**
* Get the Content-Disposition.
*/
@Override
public String getDisposition() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getDisposition();
loadBODYSTRUCTURE();
return bs.disposition;
}
@Override
public void setDisposition(String disposition) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the Content-Transfer-Encoding.
*/
@Override
public String getEncoding() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getEncoding();
loadBODYSTRUCTURE();
return bs.encoding;
}
/**
* Get the Content-ID.
*/
@Override
public String getContentID() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getContentID();
loadBODYSTRUCTURE();
return bs.id;
}
@Override
public void setContentID(String cid) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the Content-MD5.
*/
@Override
public String getContentMD5() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getContentMD5();
loadBODYSTRUCTURE();
return bs.md5;
}
@Override
public void setContentMD5(String md5) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the decoded Content-Description.
*/
@Override
public String getDescription() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getDescription();
if (description != null) // cached value ?
return description;
loadBODYSTRUCTURE();
if (bs.description == null)
return null;
try {
description = MimeUtility.decodeText(bs.description);
} catch (UnsupportedEncodingException ex) {
description = bs.description;
}
return description;
}
@Override
public void setDescription(String description, String charset)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get the Message-ID.
*/
@Override
public String getMessageID() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getMessageID();
loadEnvelope();
return envelope.messageId;
}
/**
* Get the "filename" Disposition parameter. (Only available in
* IMAP4rev1). If thats not available, get the "name" ContentType
* parameter.
*/
@Override
public String getFileName() throws MessagingException {
checkExpunged();
if (bodyLoaded)
return super.getFileName();
String filename = null;
loadBODYSTRUCTURE();
if (bs.dParams != null)
filename = bs.dParams.get("filename");
if (filename == null && bs.cParams != null)
filename = bs.cParams.get("name");
return filename;
}
@Override
public void setFileName(String filename) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get all the bytes for this message. Overrides getContentStream()
* in MimeMessage. This method is ultimately used by the DataHandler
* to obtain the input stream for this message.
*
* @see jakarta.mail.internet.MimeMessage#getContentStream
*/
@Override
protected InputStream getContentStream() throws MessagingException {
if (bodyLoaded)
return super.getContentStream();
InputStream is = null;
boolean pk = getPeek(); // get before acquiring message cache lock
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
// This message could be expunged when we were waiting
// to acquire the lock ...
checkExpunged();
if (p.isREV1() && (getFetchBlockSize() != -1)) // IMAP4rev1
return new IMAPInputStream(this, toSection("TEXT"),
bs != null && !ignoreBodyStructureSize() ?
bs.size : -1, pk);
if (p.isREV1()) {
BODY b;
if (pk)
b = p.peekBody(getSequenceNumber(), toSection("TEXT"));
else
b = p.fetchBody(getSequenceNumber(), toSection("TEXT"));
if (b != null)
is = b.getByteArrayInputStream();
} else {
RFC822DATA rd = p.fetchRFC822(getSequenceNumber(), "TEXT");
if (rd != null)
is = rd.getByteArrayInputStream();
}
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
}
if (is == null) {
forceCheckExpunged(); // may throw MessageRemovedException
// nope, the server doesn't think it's expunged.
// can't tell the difference between the server returning NIL
// and some other error that caused null to be returned above,
// so we'll just assume it was empty content.
is = new ByteArrayInputStream(new byte[0]);
}
return is;
}
/**
* Get the DataHandler object for this message.
*/
@Override
public synchronized DataHandler getDataHandler()
throws MessagingException {
checkExpunged();
if (dh == null && !bodyLoaded) {
loadBODYSTRUCTURE();
if (type == null) { // type not yet computed
// generate content-type from BODYSTRUCTURE
ContentType ct = new ContentType(bs.type, bs.subtype,
bs.cParams);
type = ct.toString();
}
/* Special-case Multipart and Nested content. All other
* cases are handled by the superclass.
*/
if (bs.isMulti())
dh = new DataHandler(
new IMAPMultipartDataSource(this, bs.bodies,
sectionId, this)
);
else if (bs.isNested() && isREV1() && bs.envelope != null)
/* Nested messages are handled specially only for
* IMAP4rev1. IMAP4 doesn't provide enough support to
* FETCH the components of nested messages
*/
dh = new DataHandler(
new IMAPNestedMessage(this,
bs.bodies[0],
bs.envelope,
sectionId == null ? "1" : sectionId + ".1"),
type
);
}
return super.getDataHandler();
}
@Override
public void setDataHandler(DataHandler content)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Return the MIME format stream corresponding to this message.
*
* @return the MIME format stream
* @since JavaMail 1.4.5
*/
@Override
public InputStream getMimeStream() throws MessagingException {
// XXX - need an "if (bodyLoaded)" version
InputStream is = null;
boolean pk = getPeek(); // get before acquiring message cache lock
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
checkExpunged(); // insure this message is not expunged
if (p.isREV1() && (getFetchBlockSize() != -1)) // IMAP4rev1
return new IMAPInputStream(this, sectionId, -1, pk);
if (p.isREV1()) {
BODY b;
if (pk)
b = p.peekBody(getSequenceNumber(), sectionId);
else
b = p.fetchBody(getSequenceNumber(), sectionId);
if (b != null)
is = b.getByteArrayInputStream();
} else {
RFC822DATA rd = p.fetchRFC822(getSequenceNumber(), null);
if (rd != null)
is = rd.getByteArrayInputStream();
}
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
}
if (is == null) {
forceCheckExpunged(); // may throw MessageRemovedException
// nope, the server doesn't think it's expunged.
// can't tell the difference between the server returning NIL
// and some other error that caused null to be returned above,
// so we'll just assume it was empty content.
is = new ByteArrayInputStream(new byte[0]);
}
return is;
}
/**
* Write out the bytes into the given OutputStream.
*/
@Override
public void writeTo(OutputStream os)
throws IOException, MessagingException {
if (bodyLoaded) {
super.writeTo(os);
return;
}
InputStream is = getMimeStream();
try {
// write out the bytes
byte[] bytes = new byte[16 * 1024];
int count;
while ((count = is.read(bytes)) != -1)
os.write(bytes, 0, count);
} finally {
is.close();
}
}
/**
* Get the named header.
*/
@Override
public String[] getHeader(String name) throws MessagingException {
checkExpunged();
if (isHeaderLoaded(name)) // already loaded ?
return headers.getHeader(name);
// Load this particular header
InputStream is = null;
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
// This message could be expunged when we were waiting
// to acquire the lock ...
checkExpunged();
if (p.isREV1()) {
BODY b = p.peekBody(getSequenceNumber(),
toSection("HEADER.FIELDS (" + name + ")")
);
if (b != null)
is = b.getByteArrayInputStream();
} else {
RFC822DATA rd = p.fetchRFC822(getSequenceNumber(),
"HEADER.LINES (" + name + ")");
if (rd != null)
is = rd.getByteArrayInputStream();
}
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
}
// if we get this far without "is" being set, something has gone
// wrong; prevent a later NullPointerException and return null here
if (is == null)
return null;
if (headers == null)
headers = new InternetHeaders();
headers.load(is); // load this header into the Headers object.
setHeaderLoaded(name); // Mark this header as loaded
return headers.getHeader(name);
}
/**
* Get the named header.
*/
@Override
public String getHeader(String name, String delimiter)
throws MessagingException {
checkExpunged();
// force the header to be loaded by invoking getHeader(name)
if (getHeader(name) == null)
return null;
return headers.getHeader(name, delimiter);
}
@Override
public void setHeader(String name, String value)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
@Override
public void addHeader(String name, String value)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
@Override
public void removeHeader(String name)
throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get all headers.
*/
@Override
public Enumeration getAllHeaders() throws MessagingException {
checkExpunged();
loadHeaders();
return super.getAllHeaders();
}
/**
* Get matching headers.
*/
@Override
public Enumeration getMatchingHeaders(String[] names)
throws MessagingException {
checkExpunged();
loadHeaders();
return super.getMatchingHeaders(names);
}
/**
* Get non-matching headers.
*/
@Override
public Enumeration getNonMatchingHeaders(String[] names)
throws MessagingException {
checkExpunged();
loadHeaders();
return super.getNonMatchingHeaders(names);
}
@Override
public void addHeaderLine(String line) throws MessagingException {
throw new IllegalWriteException("IMAPMessage is read-only");
}
/**
* Get all header-lines.
*/
@Override
public Enumeration getAllHeaderLines() throws MessagingException {
checkExpunged();
loadHeaders();
return super.getAllHeaderLines();
}
/**
* Get all matching header-lines.
*/
@Override
public Enumeration getMatchingHeaderLines(String[] names)
throws MessagingException {
checkExpunged();
loadHeaders();
return super.getMatchingHeaderLines(names);
}
/**
* Get all non-matching headerlines.
*/
@Override
public Enumeration getNonMatchingHeaderLines(String[] names)
throws MessagingException {
checkExpunged();
loadHeaders();
return super.getNonMatchingHeaderLines(names);
}
/**
* Get the Flags for this message.
*/
@Override
public synchronized Flags getFlags() throws MessagingException {
checkExpunged();
loadFlags();
return super.getFlags();
}
/**
* Test if the given Flags are set in this message.
*/
@Override
public synchronized boolean isSet(Flags.Flag flag)
throws MessagingException {
checkExpunged();
loadFlags();
return super.isSet(flag);
}
/**
* Set/Unset the given flags in this message.
*/
@Override
public synchronized void setFlags(Flags flag, boolean set)
throws MessagingException {
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
checkExpunged(); // Insure that this message is not expunged
p.storeFlags(getSequenceNumber(), flag, set);
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
throw new MessagingException(pex.getMessage(), pex);
}
}
}
/**
* Set whether or not to use the PEEK variant of FETCH when
* fetching message content. This overrides the default
* value from the "mail.imap.peek" property.
*
* @param peek the peek flag
* @since JavaMail 1.3.3
*/
public synchronized void setPeek(boolean peek) {
this.peek = Boolean.valueOf(peek);
}
/**
* Get whether or not to use the PEEK variant of FETCH when
* fetching message content.
*
* @return the peek flag
* @since JavaMail 1.3.3
*/
public synchronized boolean getPeek() {
if (peek == null)
return ((IMAPStore) folder.getStore()).getPeek();
else
return peek.booleanValue();
}
/**
* Invalidate cached header and envelope information for this
* message. Subsequent accesses of this information will
* cause it to be fetched from the server.
*
* @since JavaMail 1.3.3
*/
public synchronized void invalidateHeaders() {
headersLoaded = false;
loadedHeaders.clear();
headers = null;
envelope = null;
bs = null;
receivedDate = null;
size = -1;
type = null;
subject = null;
description = null;
flags = null;
content = null;
contentStream = null;
bodyLoaded = false;
}
/**
* This class implements the test to be done on each
* message in the folder. The test is to check whether the
* message has already cached all the items requested in the
* FetchProfile. If any item is missing, the test succeeds and
* breaks out.
*/
public static class FetchProfileCondition implements Utility.Condition {
private boolean needEnvelope = false;
private boolean needFlags = false;
private boolean needBodyStructure = false;
private boolean needUID = false;
private boolean needHeaders = false;
private boolean needSize = false;
private boolean needMessage = false;
private boolean needRDate = false;
private String[] hdrs = null;
private Set need = new HashSet<>();
/**
* Create a FetchProfileCondition to determine if we need to fetch
* any of the information specified in the FetchProfile.
*
* @param fp the FetchProfile
* @param fitems the FETCH items
*/
@SuppressWarnings("deprecation") // for FetchProfile.Item.SIZE
public FetchProfileCondition(FetchProfile fp, FetchItem[] fitems) {
if (fp.contains(FetchProfile.Item.ENVELOPE))
needEnvelope = true;
if (fp.contains(FetchProfile.Item.FLAGS))
needFlags = true;
if (fp.contains(FetchProfile.Item.CONTENT_INFO))
needBodyStructure = true;
if (fp.contains(FetchProfile.Item.SIZE))
needSize = true;
if (fp.contains(UIDFolder.FetchProfileItem.UID))
needUID = true;
if (fp.contains(IMAPFolder.FetchProfileItem.HEADERS))
needHeaders = true;
if (fp.contains(IMAPFolder.FetchProfileItem.SIZE))
needSize = true;
if (fp.contains(IMAPFolder.FetchProfileItem.MESSAGE))
needMessage = true;
if (fp.contains(IMAPFolder.FetchProfileItem.INTERNALDATE))
needRDate = true;
hdrs = fp.getHeaderNames();
for (int i = 0; i < fitems.length; i++) {
if (fp.contains(fitems[i].getFetchProfileItem()))
need.add(fitems[i]);
}
}
/**
* Return true if we NEED to fetch the requested information
* for the specified message.
*/
@Override
public boolean test(IMAPMessage m) {
if (needEnvelope && m._getEnvelope() == null && !m.bodyLoaded)
return true; // no envelope
if (needFlags && m._getFlags() == null)
return true; // no flags
if (needBodyStructure && m._getBodyStructure() == null &&
!m.bodyLoaded)
return true; // no BODYSTRUCTURE
if (needUID && m.getUID() == -1) // no UID
return true;
if (needHeaders && !m.areHeadersLoaded()) // no headers
return true;
if (needSize && m.size == -1 && !m.bodyLoaded) // no size
return true;
if (needMessage && !m.bodyLoaded) // no message body
return true;
if (needRDate && m.receivedDate == null) // no received date
return true;
// Is the desired header present ?
for (int i = 0; i < hdrs.length; i++) {
if (!m.isHeaderLoaded(hdrs[i]))
return true; // Nope, return
}
Iterator it = need.iterator();
while (it.hasNext()) {
FetchItem fitem = it.next();
if (m.items == null || m.items.get(fitem.getName()) == null)
return true;
}
return false;
}
}
/**
* Apply the data in the FETCH item to this message.
*
* ASSERT: Must hold the messageCacheLock.
*
* @param item the fetch item
* @param hdrs the headers we're asking for
* @param allHeaders load all headers?
* @return did we handle this fetch item?
* @exception MessagingException for failures
* @since JavaMail 1.4.6
*/
protected boolean handleFetchItem(Item item,
String[] hdrs, boolean allHeaders)
throws MessagingException {
// Check for the FLAGS item
if (item instanceof Flags)
flags = (Flags) item;
// Check for ENVELOPE items
else if (item instanceof ENVELOPE)
envelope = (ENVELOPE) item;
else if (item instanceof INTERNALDATE)
receivedDate = ((INTERNALDATE) item).getDate();
else if (item instanceof RFC822SIZE)
size = ((RFC822SIZE) item).size;
else if (item instanceof MODSEQ)
modseq = ((MODSEQ) item).modseq;
// Check for the BODYSTRUCTURE item
else if (item instanceof BODYSTRUCTURE)
bs = (BODYSTRUCTURE) item;
// Check for the UID item
else if (item instanceof UID) {
UID u = (UID) item;
uid = u.uid; // set uid
// add entry into uid table
if (((IMAPFolder) folder).uidTable == null)
((IMAPFolder) folder).uidTable
= new Hashtable<>();
((IMAPFolder) folder).uidTable.put(Long.valueOf(u.uid), this);
}
// Check for header items
else if (item instanceof RFC822DATA ||
item instanceof BODY) {
InputStream headerStream;
boolean isHeader;
if (item instanceof RFC822DATA) { // IMAP4
headerStream =
((RFC822DATA) item).getByteArrayInputStream();
isHeader = ((RFC822DATA) item).isHeader();
} else { // IMAP4rev1
headerStream =
((BODY) item).getByteArrayInputStream();
isHeader = ((BODY) item).isHeader();
}
if (!isHeader) {
// load the entire message by using the superclass
// MimeMessage.parse method
// first, save the size of the message
try {
size = headerStream.available();
} catch (IOException ex) {
// should never occur
}
parse(headerStream);
bodyLoaded = true;
setHeadersLoaded(true);
} else {
// Load the obtained headers.
InternetHeaders h = new InternetHeaders();
// Some IMAP servers (e.g., gmx.net) return NIL
// instead of a string just containing a CR/LF
// when the header list is empty.
if (headerStream != null)
h.load(headerStream);
if (headers == null || allHeaders)
headers = h;
else {
/*
* This is really painful. A second fetch
* of the same headers (which might occur because
* a new header was added to the set requested)
* will return headers we already know about.
* In this case, only load the headers we haven't
* seen before to avoid adding duplicates of
* headers we already have.
*
* XXX - There's a race condition here if another
* thread is reading headers in the same message
* object, because InternetHeaders is not thread
* safe.
*/
Enumeration e = h.getAllHeaders();
while (e.hasMoreElements()) {
Header he = e.nextElement();
if (!isHeaderLoaded(he.getName()))
headers.addHeader(
he.getName(), he.getValue());
}
}
// if we asked for all headers, assume we got them
if (allHeaders)
setHeadersLoaded(true);
else {
// Mark all headers we asked for as 'loaded'
for (int k = 0; k < hdrs.length; k++)
setHeaderLoaded(hdrs[k]);
}
}
} else
return false; // not handled
return true; // something above handled it
}
/**
* Apply the data in the extension FETCH items to this message.
* This method adds all the items to the items map.
* Subclasses may override this method to call super and then
* also copy the data to a more convenient form.
*
* ASSERT: Must hold the messageCacheLock.
*
* @param extensionItems the Map to add fetch items to
* @since JavaMail 1.4.6
*/
protected void handleExtensionFetchItems(
Map extensionItems) {
if (extensionItems == null || extensionItems.isEmpty())
return;
if (items == null)
items = new HashMap<>();
items.putAll(extensionItems);
}
/**
* Fetch an individual item for the current message.
* Note that handleExtensionFetchItems will have been called
* to store this item in the message before this method
* returns.
*
* @param fitem the FetchItem
* @return the data associated with the FetchItem
* @exception MessagingException for failures
* @since JavaMail 1.4.6
*/
protected Object fetchItem(FetchItem fitem)
throws MessagingException {
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
Object robj = null;
try {
IMAPProtocol p = getProtocol();
checkExpunged(); // Insure that this message is not expunged
int seqnum = getSequenceNumber();
Response[] r = p.fetch(seqnum, fitem.getName());
for (int i = 0; i < r.length; i++) {
// If this response is NOT a FetchResponse or if it does
// not match our seqnum, skip.
if (r[i] == null ||
!(r[i] instanceof FetchResponse) ||
((FetchResponse) r[i]).getNumber() != seqnum)
continue;
FetchResponse f = (FetchResponse) r[i];
handleExtensionFetchItems(f.getExtensionItems());
if (items != null) {
Object o = items.get(fitem.getName());
if (o != null)
robj = o;
}
}
// ((IMAPFolder)folder).handleResponses(r);
p.notifyResponseHandlers(r);
p.handleResult(r[r.length - 1]);
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
return robj;
} // Release MessageCacheLock
}
/**
* Return the data associated with the FetchItem.
* If the data hasn't been fetched, call the fetchItem
* method to fetch it. Returns null if there is no
* data for the FetchItem.
*
* @param fitem the FetchItem
* @return the data associated with the FetchItem
* @exception MessagingException for failures
* @since JavaMail 1.4.6
*/
public synchronized Object getItem(FetchItem fitem)
throws MessagingException {
Object item = items == null ? null : items.get(fitem.getName());
if (item == null)
item = fetchItem(fitem);
return item;
}
/*
* Load the Envelope for this message.
*/
private synchronized void loadEnvelope() throws MessagingException {
if (envelope != null) // already loaded
return;
Response[] r = null;
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
checkExpunged(); // Insure that this message is not expunged
int seqnum = getSequenceNumber();
r = p.fetch(seqnum, EnvelopeCmd);
for (int i = 0; i < r.length; i++) {
// If this response is NOT a FetchResponse or if it does
// not match our seqnum, skip.
if (r[i] == null ||
!(r[i] instanceof FetchResponse) ||
((FetchResponse) r[i]).getNumber() != seqnum)
continue;
FetchResponse f = (FetchResponse) r[i];
// Look for the Envelope items.
int count = f.getItemCount();
for (int j = 0; j < count; j++) {
Item item = f.getItem(j);
if (item instanceof ENVELOPE)
envelope = (ENVELOPE) item;
else if (item instanceof INTERNALDATE)
receivedDate = ((INTERNALDATE) item).getDate();
else if (item instanceof RFC822SIZE)
size = ((RFC822SIZE) item).size;
}
}
// ((IMAPFolder)folder).handleResponses(r);
p.notifyResponseHandlers(r);
p.handleResult(r[r.length - 1]);
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
} // Release MessageCacheLock
if (envelope == null)
throw new MessagingException("Failed to load IMAP envelope");
}
/*
* Load the BODYSTRUCTURE
*/
private synchronized void loadBODYSTRUCTURE()
throws MessagingException {
if (bs != null) // already loaded
return;
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
// This message could be expunged when we were waiting
// to acquire the lock ...
checkExpunged();
bs = p.fetchBodyStructure(getSequenceNumber());
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
if (bs == null) {
// if the FETCH is successful, we should always get a
// BODYSTRUCTURE, but some servers fail to return it
// if the message has been expunged
forceCheckExpunged();
throw new MessagingException("Unable to load BODYSTRUCTURE");
}
}
}
/*
* Load all headers.
*/
private synchronized void loadHeaders() throws MessagingException {
if (headersLoaded)
return;
InputStream is = null;
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
// This message could be expunged when we were waiting
// to acquire the lock ...
checkExpunged();
if (p.isREV1()) {
BODY b = p.peekBody(getSequenceNumber(),
toSection("HEADER"));
if (b != null)
is = b.getByteArrayInputStream();
} else {
RFC822DATA rd = p.fetchRFC822(getSequenceNumber(),
"HEADER");
if (rd != null)
is = rd.getByteArrayInputStream();
}
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
} // Release MessageCacheLock
if (is == null)
throw new MessagingException("Cannot load header");
headers = new InternetHeaders(is);
headersLoaded = true;
}
/*
* Load this message's Flags
*/
private synchronized void loadFlags() throws MessagingException {
if (flags != null)
return;
// Acquire MessageCacheLock, to freeze seqnum.
synchronized (getMessageCacheLock()) {
try {
IMAPProtocol p = getProtocol();
// This message could be expunged when we were waiting
// to acquire the lock ...
checkExpunged();
flags = p.fetchFlags(getSequenceNumber());
// make sure flags is always set, even if server is broken
if (flags == null)
flags = new Flags();
} catch (ConnectionException cex) {
throw new FolderClosedException(folder, cex.getMessage());
} catch (ProtocolException pex) {
forceCheckExpunged();
throw new MessagingException(pex.getMessage(), pex);
}
} // Release MessageCacheLock
}
/*
* Are all headers loaded?
*/
private boolean areHeadersLoaded() {
return headersLoaded;
}
/*
* Set whether all headers are loaded.
*/
private void setHeadersLoaded(boolean loaded) {
headersLoaded = loaded;
}
/*
* Check if the given header was ever loaded from the server
*/
private boolean isHeaderLoaded(String name) {
if (headersLoaded) // All headers for this message have been loaded
return true;
return loadedHeaders.containsKey(name.toUpperCase(Locale.ENGLISH));
}
/*
* Mark that the given headers have been loaded from the server.
*/
private void setHeaderLoaded(String name) {
loadedHeaders.put(name.toUpperCase(Locale.ENGLISH), name);
}
/*
* Convert the given FETCH item identifier to the approriate
* section-string for this message.
*/
private String toSection(String what) {
if (sectionId == null)
return what;
else
return sectionId + "." + what;
}
/*
* Clone an array of InternetAddresses.
*/
private InternetAddress[] aaclone(InternetAddress[] aa) {
if (aa == null)
return null;
else
return aa.clone();
}
private Flags _getFlags() {
return flags;
}
private ENVELOPE _getEnvelope() {
return envelope;
}
private BODYSTRUCTURE _getBodyStructure() {
return bs;
}
/***********************************************************
* accessor routines to make available certain private/protected
* fields to other classes in this package.
***********************************************************/
/*
* Called by IMAPFolder.
* Must not be synchronized.
*/
void _setFlags(Flags flags) {
this.flags = flags;
}
/*
* Called by IMAPNestedMessage.
*/
Session _getSession() {
return session;
}
}