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/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright 2009 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smack;
import java.io.StringReader;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smack.sasl.SASLMechanism.Challenge;
import org.jivesoftware.smack.sasl.SASLMechanism.Failure;
import org.jivesoftware.smack.sasl.SASLMechanism.Success;
import org.xmlpull.v1.XmlPullParserFactory;
import org.xmlpull.v1.XmlPullParser;
import com.kenai.jbosh.AbstractBody;
import com.kenai.jbosh.BOSHClientResponseListener;
import com.kenai.jbosh.BOSHMessageEvent;
import com.kenai.jbosh.BodyQName;
import com.kenai.jbosh.ComposableBody;
/**
* Listens for XML traffic from the BOSH connection manager and parses it into
* packet objects.
*
* @author Guenther Niess
*/
public class BOSHPacketReader implements BOSHClientResponseListener {
private BOSHConnection connection;
/**
* Create a packet reader which listen on a BOSHConnection for received
* HTTP responses, parse the packets and notifies the connection.
*
* @param connection the corresponding connection for the received packets.
*/
public BOSHPacketReader(BOSHConnection connection) {
this.connection = connection;
}
/**
* Parse the received packets and notify the corresponding connection.
*
* @param event the BOSH client response which includes the received packet.
*/
public void responseReceived(BOSHMessageEvent event) {
AbstractBody body = event.getBody();
if (body != null) {
try {
if (connection.sessionID == null) {
connection.sessionID = body.getAttribute(BodyQName.create(BOSHConnection.BOSH_URI, "sid"));
}
if (connection.authID == null) {
connection.authID = body.getAttribute(BodyQName.create(BOSHConnection.BOSH_URI, "authid"));
}
final XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES,
true);
parser.setInput(new StringReader(body.toXML()));
int eventType = parser.getEventType();
do {
eventType = parser.next();
if (eventType == XmlPullParser.START_TAG) {
if (parser.getName().equals("body")) {
// ignore the container root element
} else if (parser.getName().equals("message")) {
connection.processPacket(PacketParserUtils.parseMessage(parser));
} else if (parser.getName().equals("iq")) {
connection.processPacket(PacketParserUtils.parseIQ(parser, connection));
} else if (parser.getName().equals("presence")) {
connection.processPacket(PacketParserUtils.parsePresence(parser));
} else if (parser.getName().equals("challenge")) {
// The server is challenging the SASL authentication
// made by the client
final String challengeData = parser.nextText();
connection.getSASLAuthentication()
.challengeReceived(challengeData);
connection.processPacket(new Challenge(
challengeData));
} else if (parser.getName().equals("success")) {
connection.send(ComposableBody.builder()
.setNamespaceDefinition("xmpp", BOSHConnection.XMPP_BOSH_NS)
.setAttribute(
BodyQName.createWithPrefix(BOSHConnection.XMPP_BOSH_NS, "restart", "xmpp"),
"true")
.setAttribute(
BodyQName.create(BOSHConnection.BOSH_URI, "to"),
connection.getServiceName())
.build());
connection.getSASLAuthentication().authenticated();
connection.processPacket(new Success(parser.nextText()));
} else if (parser.getName().equals("features")) {
parseFeatures(parser);
} else if (parser.getName().equals("failure")) {
if ("urn:ietf:params:xml:ns:xmpp-sasl".equals(parser.getNamespace(null))) {
final Failure failure = PacketParserUtils.parseSASLFailure(parser);
connection.getSASLAuthentication().authenticationFailed();
connection.processPacket(failure);
}
} else if (parser.getName().equals("error")) {
throw new XMPPException(PacketParserUtils.parseStreamError(parser));
}
}
} while (eventType != XmlPullParser.END_DOCUMENT);
}
catch (Exception e) {
if (connection.isConnected()) {
connection.notifyConnectionError(e);
}
}
}
}
/**
* Parse and setup the XML stream features.
*
* @param parser the XML parser, positioned at the start of a message packet.
* @throws Exception if an exception occurs while parsing the packet.
*/
private void parseFeatures(XmlPullParser parser) throws Exception {
boolean done = false;
while (!done) {
int eventType = parser.next();
if (eventType == XmlPullParser.START_TAG) {
if (parser.getName().equals("mechanisms")) {
// The server is reporting available SASL mechanisms. Store
// this information
// which will be used later while logging (i.e.
// authenticating) into
// the server
connection.getSASLAuthentication().setAvailableSASLMethods(
PacketParserUtils.parseMechanisms(parser));
} else if (parser.getName().equals("bind")) {
// The server requires the client to bind a resource to the
// stream
connection.getSASLAuthentication().bindingRequired();
} else if (parser.getName().equals("session")) {
// The server supports sessions
connection.getSASLAuthentication().sessionsSupported();
} else if (parser.getName().equals("register")) {
connection.getAccountManager().setSupportsAccountCreation(
true);
}
} else if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals("features")) {
done = true;
}
}
}
}
}
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