/** * * Copyright 2003-2007 Jive Software. * * 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.jivesoftware.smack; import org.jivesoftware.smack.packet.IQ; import org.jivesoftware.smack.packet.Packet; import org.jivesoftware.smack.packet.Presence; import org.jivesoftware.smack.parsing.ParsingExceptionCallback; import org.jivesoftware.smack.parsing.UnparsablePacket; import org.jivesoftware.smack.sasl.SASLMechanism.Challenge; import org.jivesoftware.smack.sasl.SASLMechanism.SASLFailure; import org.jivesoftware.smack.sasl.SASLMechanism.Success; import org.jivesoftware.smack.util.PacketParserUtils; import org.jivesoftware.smack.SmackException.NoResponseException; import org.jivesoftware.smack.SmackException.SecurityRequiredException; import org.jivesoftware.smack.XMPPException.StreamErrorException; import org.xmlpull.v1.XmlPullParserFactory; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import java.util.logging.Level; import java.util.logging.Logger; /** * Listens for XML traffic from the XMPP server and parses it into packet objects. * The packet reader also invokes all packet listeners and collectors.
*
* @see XMPPConnection#createPacketCollector
* @see XMPPConnection#addPacketListener
* @author Matt Tucker
*/
class PacketReader {
private static final Logger LOGGER = Logger.getLogger(PacketReader.class.getName());
private Thread readerThread;
private XMPPTCPConnection connection;
private XmlPullParser parser;
volatile boolean done;
private String connectionID = null;
protected PacketReader(final XMPPTCPConnection connection) {
this.connection = connection;
this.init();
}
/**
* Initializes the reader in order to be used. The reader is initialized during the
* first connection and when reconnecting due to an abruptly disconnection.
*/
protected void init() {
done = false;
connectionID = null;
readerThread = new Thread() {
public void run() {
parsePackets(this);
}
};
readerThread.setName("Smack Packet Reader (" + connection.connectionCounterValue + ")");
readerThread.setDaemon(true);
resetParser();
}
/**
* Starts the packet reader thread and returns once a connection to the server
* has been established. A connection will be attempted for a maximum of five
* seconds. An XMPPException will be thrown if the connection fails.
* @throws NoResponseException if the server fails to send an opening stream back
* within packetReplyTimeout*3.
*/
synchronized public void startup() throws NoResponseException {
readerThread.start();
// Wait for stream tag before returning. We'll wait a couple of seconds before
// giving up and throwing an error.
try {
// A waiting thread may be woken up before the wait time or a notify
// (although this is a rare thing). Therefore, we continue waiting
// until either a connectionID has been set (and hence a notify was
// made) or the total wait time has elapsed.
long waitTime = connection.getPacketReplyTimeout();
wait(3 * waitTime);
}
catch (InterruptedException ie) {
// Ignore.
}
if (connectionID == null) {
throw new NoResponseException();
}
else {
connection.connectionID = connectionID;
}
}
/**
* Shuts the packet reader down.
*/
public void shutdown() {
// Notify connection listeners of the connection closing if done hasn't already been set.
if (!done) {
connection.callConnectionClosedListener();
}
done = true;
}
/**
* Resets the parser using the latest connection's reader. Reseting the parser is necessary
* when the plain connection has been secured or when a new opening stream element is going
* to be sent by the server.
*/
private void resetParser() {
try {
parser = XmlPullParserFactory.newInstance().newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
parser.setInput(connection.reader);
}
catch (XmlPullParserException xppe) {
LOGGER.log(Level.WARNING, "Error while resetting parser", xppe);
}
}
/**
* Parse top-level packets in order to process them further.
*
* @param thread the thread that is being used by the reader to parse incoming packets.
*/
private void parsePackets(Thread thread) {
try {
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
int parserDepth = parser.getDepth();
ParsingExceptionCallback callback = connection.getParsingExceptionCallback();
if (parser.getName().equals("message")) {
Packet packet;
try {
packet = PacketParserUtils.parseMessage(parser);
} catch (Exception e) {
String content = PacketParserUtils.parseContentDepth(parser, parserDepth);
UnparsablePacket message = new UnparsablePacket(content, e);
if (callback != null) {
callback.handleUnparsablePacket(message);
}
continue;
}
connection.processPacket(packet);
}
else if (parser.getName().equals("iq")) {
IQ iq;
try {
iq = PacketParserUtils.parseIQ(parser, connection);
} catch (Exception e) {
String content = PacketParserUtils.parseContentDepth(parser, parserDepth);
UnparsablePacket message = new UnparsablePacket(content, e);
if (callback != null) {
callback.handleUnparsablePacket(message);
}
continue;
}
connection.processPacket(iq);
}
else if (parser.getName().equals("presence")) {
Presence presence;
try {
presence = PacketParserUtils.parsePresence(parser);
} catch (Exception e) {
String content = PacketParserUtils.parseContentDepth(parser, parserDepth);
UnparsablePacket message = new UnparsablePacket(content, e);
if (callback != null) {
callback.handleUnparsablePacket(message);
}
continue;
}
connection.processPacket(presence);
}
// We found an opening stream. Record information about it, then notify
// the connectionID lock so that the packet reader startup can finish.
else if (parser.getName().equals("stream")) {
// Ensure the correct jabber:client namespace is being used.
if ("jabber:client".equals(parser.getNamespace(null))) {
// Get the connection id.
for (int i=0; i