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Add AbstractXMPPConnection.parseAndProcessStanza()

Browse source 
and remove BOSHPacketReader.

Reduces the duplicate code in smack-tcp and smack-bosh. Also moves
ParsingExceptionCallback into AbstractXMPPConnection.
This commit is contained in:
Florian Schmaus 2014-12-28 17:43:39 +01:00
parent 54706e3918
commit 08c1f2c850
4 changed files with 136 additions and 182 deletions
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124
smack-bosh/src/main/java/org/jivesoftware/smack/bosh/BOSHPacketReader.java
View file

@ -1,124 +0,0 @@
/**
*
* Copyright 2009 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.bosh;
import java.io.StringReader;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.SASLFailure;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.Success;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smack.XMPPException.StreamErrorException;
import org.xmlpull.v1.XmlPullParserFactory;
import org.xmlpull.v1.XmlPullParser;
import org.igniterealtime.jbosh.AbstractBody;
import org.igniterealtime.jbosh.BOSHClientResponseListener;
import org.igniterealtime.jbosh.BOSHMessageEvent;
import org.igniterealtime.jbosh.BodyQName;
import org.igniterealtime.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 XMPPBOSHConnection 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(XMPPBOSHConnection 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(XMPPBOSHConnection.BOSH_URI, "sid"));
}
if (connection.authID == null) {
connection.authID = body.getAttribute(BodyQName.create(XMPPBOSHConnection.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) {
Packet packet = PacketParserUtils.parseStanza(parser, connection);
if (packet != null) {
connection.processPacket(packet);
// TODO call connection.reportStanzaReceived here
} 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);
} else if (parser.getName().equals("success")) {
connection.send(ComposableBody.builder()
.setNamespaceDefinition("xmpp", XMPPBOSHConnection.XMPP_BOSH_NS)
.setAttribute(
BodyQName.createWithPrefix(XMPPBOSHConnection.XMPP_BOSH_NS, "restart", "xmpp"),
"true")
.setAttribute(
BodyQName.create(XMPPBOSHConnection.BOSH_URI, "to"),
connection.getServiceName())
.build());
Success success = new Success(parser.nextText());
connection.getSASLAuthentication().authenticated(success);
} 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 SASLFailure failure = PacketParserUtils.parseSASLFailure(parser);
connection.getSASLAuthentication().authenticationFailed(failure);
}
} else if (parser.getName().equals("error")) {
throw new StreamErrorException(PacketParserUtils.parseStreamError(parser));
}
}
} while (eventType != XmlPullParser.END_DOCUMENT);
}
catch (Exception e) {
if (connection.isConnected()) {
connection.notifyConnectionError(e);
}
}
}
}
private void parseFeatures(XmlPullParser parser) throws Exception {
connection.parseFeatures0(parser);
}
}

104
smack-bosh/src/main/java/org/jivesoftware/smack/bosh/XMPPBOSHConnection.java
View file

@ -20,6 +20,7 @@ package org.jivesoftware.smack.bosh;
import java.io.IOException;
import java.io.PipedReader;
import java.io.PipedWriter;
import java.io.StringReader;
import java.io.Writer;
import java.util.logging.Level;
import java.util.logging.Logger;
@ -30,18 +31,25 @@ import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.ConnectionException;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPException.StreamErrorException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.ConnectionCreationListener;
import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.Element;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.PlainStreamElement;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.Presence.Type;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.SASLFailure;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.Success;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;
import org.igniterealtime.jbosh.AbstractBody;
import org.igniterealtime.jbosh.BOSHClient;
import org.igniterealtime.jbosh.BOSHClientConfig;
import org.igniterealtime.jbosh.BOSHClientConnEvent;
@ -154,7 +162,7 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
client = BOSHClient.create(cfgBuilder.build());
client.addBOSHClientConnListener(new BOSHConnectionListener(this));
client.addBOSHClientResponseListener(new BOSHPacketReader(this));
client.addBOSHClientResponseListener(new BOSHPacketReader());
// Initialize the debugger
if (config.isDebuggerEnabled()) {
@ -443,20 +451,6 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
callConnectionClosedOnErrorListener(e);
}
@Override
protected void processPacket(Packet packet) {
super.processPacket(packet);
}
@Override
protected SASLAuthentication getSASLAuthentication() {
return super.getSASLAuthentication();
}
void parseFeatures0(XmlPullParser parser) throws Exception {
parseFeatures(parser);
}
/**
* A listener class which listen for a successfully established connection
* and connection errors and notifies the BOSHConnection.
@ -525,4 +519,82 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
}
}
}
/**
* Listens for XML traffic from the BOSH connection manager and parses it into
* packet objects.
*
* @author Guenther Niess
*/
private class BOSHPacketReader implements BOSHClientResponseListener {
/**
* 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 (sessionID == null) {
sessionID = body.getAttribute(BodyQName.create(XMPPBOSHConnection.BOSH_URI, "sid"));
}
if (authID == null) {
authID = body.getAttribute(BodyQName.create(XMPPBOSHConnection.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();
switch (eventType) {
case XmlPullParser.START_TAG:
String name = parser.getName();
switch (name) {
case Message.ELEMENT:
case IQ.ELEMENT:
case Presence.ELEMENT:
parseAndProcessStanza(parser);
break;
case "challenge":
// The server is challenging the SASL authentication
// made by the client
final String challengeData = parser.nextText();
getSASLAuthentication().challengeReceived(challengeData);
break;
case "success":
send(ComposableBody.builder().setNamespaceDefinition("xmpp",
XMPPBOSHConnection.XMPP_BOSH_NS).setAttribute(
BodyQName.createWithPrefix(XMPPBOSHConnection.XMPP_BOSH_NS, "restart",
"xmpp"), "true").setAttribute(
BodyQName.create(XMPPBOSHConnection.BOSH_URI, "to"), getServiceName()).build());
Success success = new Success(parser.nextText());
getSASLAuthentication().authenticated(success);
case "features":
parseFeatures(parser);
break;
case "failure":
if ("urn:ietf:params:xml:ns:xmpp-sasl".equals(parser.getNamespace(null))) {
final SASLFailure failure = PacketParserUtils.parseSASLFailure(parser);
getSASLAuthentication().authenticationFailed(failure);
}
break;
case "error":
throw new StreamErrorException(PacketParserUtils.parseStreamError(parser));
}
break;
}
}
while (eventType != XmlPullParser.END_DOCUMENT);
}
catch (Exception e) {
if (isConnected()) {
notifyConnectionError(e);
}
}
}
}
}
}

47
smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java
View file

@ -67,11 +67,14 @@ import org.jivesoftware.smack.packet.RosterVer;
import org.jivesoftware.smack.packet.Session;
import org.jivesoftware.smack.packet.StartTls;
import org.jivesoftware.smack.packet.PlainStreamElement;
import org.jivesoftware.smack.parsing.ParsingExceptionCallback;
import org.jivesoftware.smack.parsing.UnparsablePacket;
import org.jivesoftware.smack.provider.PacketExtensionProvider;
import org.jivesoftware.smack.provider.ProviderManager;
import org.jivesoftware.smack.rosterstore.RosterStore;
import org.jivesoftware.smack.util.DNSUtil;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smack.util.ParserUtils;
import org.jivesoftware.smack.util.SmackExecutorThreadFactory;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smack.util.dns.HostAddress;
@ -211,6 +214,8 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
protected XMPPInputOutputStream compressionHandler;
private ParsingExceptionCallback parsingExceptionCallback = SmackConfiguration.getDefaultParsingExceptionCallback();
/**
* ExecutorService used to invoke the PacketListeners on newly arrived and parsed stanzas. It is
* important that we use a <b>single threaded ExecutorService</b> in order to guarantee that the
@ -870,6 +875,28 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
packetReplyTimeout = timeout;
}
protected void parseAndProcessStanza(XmlPullParser parser) throws Exception {
ParserUtils.assertAtStartTag(parser);
int parserDepth = parser.getDepth();
Packet stanza = null;
try {
stanza = PacketParserUtils.parseStanza(parser, this);
}
catch (Exception e) {
CharSequence content = PacketParserUtils.parseContentDepth(parser,
parserDepth);
UnparsablePacket message = new UnparsablePacket(content, e);
ParsingExceptionCallback callback = getParsingExceptionCallback();
if (callback != null) {
callback.handleUnparsablePacket(message);
}
}
ParserUtils.assertAtEndTag(parser);
if (stanza != null) {
processPacket(stanza);
}
}
/**
* Processes a packet after it's been fully parsed by looping through the installed
* packet collectors and listeners and letting them examine the packet to see if
@ -1271,7 +1298,27 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
return lastStanzaReceived;
}
/**
* Install a parsing exception callback, which will be invoked once an exception is encountered while parsing a
* stanza
*
* @param callback the callback to install
*/
public void setParsingExceptionCallback(ParsingExceptionCallback callback) {
parsingExceptionCallback = callback;
}
/**
* Get the current active parsing exception callback.
*
* @return the active exception callback or null if there is none
*/
public ParsingExceptionCallback getParsingExceptionCallback() {
return parsingExceptionCallback;
}
protected final void asyncGo(Runnable runnable) {
cachedExecutorService.execute(runnable);
}
}

43
smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
View file

@ -48,8 +48,6 @@ import org.jivesoftware.smack.packet.StreamOpen;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.StartTls;
import org.jivesoftware.smack.parsing.ParsingExceptionCallback;
import org.jivesoftware.smack.parsing.UnparsablePacket;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.Challenge;
import org.jivesoftware.smack.sasl.packet.SaslStreamElements.SASLFailure;
@ -152,8 +150,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
private boolean usingTLS = false;
private ParsingExceptionCallback parsingExceptionCallback = SmackConfiguration.getDefaultParsingExceptionCallback();
/**
* Protected access level because of unit test purposes
*/
@ -293,25 +289,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
return connectionID;
}
/**
* Install a parsing exception callback, which will be invoked once an exception is encountered while parsing a
* stanza
*
* @param callback the callback to install
*/
public void setParsingExceptionCallback(ParsingExceptionCallback callback) {
parsingExceptionCallback = callback;
}
/**
* Get the current active parsing exception callback.
*
* @return the active exception callback or null if there is none
*/
public ParsingExceptionCallback getParsingExceptionCallback() {
return parsingExceptionCallback;
}
@Override
protected void throwNotConnectedExceptionIfAppropriate() throws NotConnectedException {
packetWriter.throwNotConnectedExceptionIfDoneAndResumptionNotPossible();
@ -975,29 +952,11 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
case Message.ELEMENT:
case IQ.ELEMENT:
case Presence.ELEMENT:
int parserDepth = parser.getDepth();
Packet packet;
try {
packet = PacketParserUtils.parseStanza(parser,
XMPPTCPConnection.this);
}
catch (Exception e) {
ParsingExceptionCallback callback = getParsingExceptionCallback();
CharSequence content = PacketParserUtils.parseContentDepth(parser,
parserDepth);
UnparsablePacket message = new UnparsablePacket(content, e);
if (callback != null) {
callback.handleUnparsablePacket(message);
}
// The parser is now at the end tag of the unparsable stanza. We need to advance to the next
// start tag in order to avoid an exception which would again lead to the execution of the
// catch block becoming effectively an endless loop.
eventType = parser.next();
continue;
parseAndProcessStanza(parser);
} finally {
clientHandledStanzasCount = SMUtils.incrementHeight(clientHandledStanzasCount);
}
processPacket(packet);
break;
case "stream":
// We found an opening stream.