org.jivesoftware.smack.SmackInitialization Maven / Gradle / Ivy
/**
*
* Copyright 2003-2007 Jive Software, 2014-2020 Florian Schmaus
*
* 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.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Collection;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jivesoftware.smack.bind2.Bind2ModuleDescriptor;
import org.jivesoftware.smack.compress.provider.CompressedProvider;
import org.jivesoftware.smack.compress.provider.FailureProvider;
import org.jivesoftware.smack.compression.CompressionModuleDescriptor;
import org.jivesoftware.smack.compression.Java7ZlibInputOutputStream;
import org.jivesoftware.smack.compression.XmppCompressionManager;
import org.jivesoftware.smack.compression.zlib.ZlibXmppCompressionFactory;
import org.jivesoftware.smack.initializer.SmackInitializer;
import org.jivesoftware.smack.isr.InstantStreamResumptionModuleDescriptor;
import org.jivesoftware.smack.packet.Bind;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.provider.BindIQProvider;
import org.jivesoftware.smack.provider.BodyElementProvider;
import org.jivesoftware.smack.provider.MessageSubjectElementProvider;
import org.jivesoftware.smack.provider.MessageThreadElementProvider;
import org.jivesoftware.smack.provider.ProviderManager;
import org.jivesoftware.smack.provider.SaslChallengeProvider;
import org.jivesoftware.smack.provider.SaslFailureProvider;
import org.jivesoftware.smack.provider.SaslSuccessProvider;
import org.jivesoftware.smack.provider.TlsFailureProvider;
import org.jivesoftware.smack.provider.TlsProceedProvider;
import org.jivesoftware.smack.sasl.core.SASLAnonymous;
import org.jivesoftware.smack.sasl.core.SASLXOauth2Mechanism;
import org.jivesoftware.smack.sasl.core.SCRAMSHA1Mechanism;
import org.jivesoftware.smack.sasl.core.ScramSha1PlusMechanism;
import org.jivesoftware.smack.util.CloseableUtil;
import org.jivesoftware.smack.util.FileUtils;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smack.xml.XmlPullParser;
public final class SmackInitialization {
static final String SMACK_VERSION;
private static final String DEFAULT_CONFIG_FILE = "org.jivesoftware.smack/smack-config.xml";
private static final Logger LOGGER = Logger.getLogger(SmackInitialization.class.getName());
/**
* Loads the configuration from the smack-config.xml and system properties file.
*
* So far this means that:
* 1) a set of classes will be loaded in order to execute their static init block
* 2) retrieve and set the current Smack release
* 3) set DEBUG
*/
static {
String smackVersion;
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(FileUtils.getStreamForClasspathFile("org.jivesoftware.smack/version", null), StandardCharsets.UTF_8));
smackVersion = reader.readLine();
} catch (Exception e) {
LOGGER.log(Level.SEVERE, "Could not determine Smack version", e);
smackVersion = "unknown";
} finally {
CloseableUtil.maybeClose(reader, LOGGER);
}
SMACK_VERSION = smackVersion;
String disabledClasses = System.getProperty("smack.disabledClasses");
if (disabledClasses != null) {
String[] splitDisabledClasses = disabledClasses.split(",");
for (String s : splitDisabledClasses) SmackConfiguration.disabledSmackClasses.add(s);
}
InputStream configFileStream;
try {
configFileStream = FileUtils.getStreamForClasspathFile(DEFAULT_CONFIG_FILE, null);
}
catch (Exception e) {
throw new IllegalStateException("Could not load Smack configuration file", e);
}
try {
processConfigFile(configFileStream, null);
}
catch (Exception e) {
throw new IllegalStateException("Could not parse Smack configuration file", e);
}
// Add the Java7 compression handler first, since it's preferred
SmackConfiguration.addCompressionHandler(new Java7ZlibInputOutputStream());
XmppCompressionManager.registerXmppCompressionFactory(ZlibXmppCompressionFactory.INSTANCE);
// Use try block since we may not have permission to get a system
// property (for example, when an applet).
try {
// Only overwrite DEBUG if it is set via the 'smack.debugEnabled' property. To prevent DEBUG_ENABLED
// = true, which could be set e.g. via a static block from user code, from being overwritten by the property not set
if (Boolean.getBoolean("smack.debugEnabled")) {
SmackConfiguration.DEBUG = true;
}
}
catch (Exception e) {
LOGGER.log(Level.FINE, "Could not handle debugEnable property on Smack initialization", e);
}
SASLAuthentication.registerSASLMechanism(new SCRAMSHA1Mechanism());
SASLAuthentication.registerSASLMechanism(new ScramSha1PlusMechanism());
SASLAuthentication.registerSASLMechanism(new SASLXOauth2Mechanism());
SASLAuthentication.registerSASLMechanism(new SASLAnonymous());
ProviderManager.addIQProvider(Bind.ELEMENT, Bind.NAMESPACE, new BindIQProvider());
ProviderManager.addExtensionProvider(Message.Body.ELEMENT, Message.Body.NAMESPACE, new BodyElementProvider());
ProviderManager.addExtensionProvider(Message.Thread.ELEMENT, Message.Thread.NAMESPACE, new MessageThreadElementProvider());
ProviderManager.addExtensionProvider(Message.Subject.ELEMENT, Message.Subject.NAMESPACE, new MessageSubjectElementProvider());
ProviderManager.addNonzaProvider(SaslChallengeProvider.INSTANCE);
ProviderManager.addNonzaProvider(SaslSuccessProvider.INSTANCE);
ProviderManager.addNonzaProvider(SaslFailureProvider.INSTANCE);
ProviderManager.addNonzaProvider(TlsProceedProvider.INSTANCE);
ProviderManager.addNonzaProvider(TlsFailureProvider.INSTANCE);
ProviderManager.addNonzaProvider(CompressedProvider.INSTANCE);
ProviderManager.addNonzaProvider(FailureProvider.INSTANCE);
SmackConfiguration.addModule(Bind2ModuleDescriptor.class);
SmackConfiguration.addModule(CompressionModuleDescriptor.class);
SmackConfiguration.addModule(InstantStreamResumptionModuleDescriptor.class);
SmackConfiguration.smackInitialized = true;
}
public static void processConfigFile(InputStream cfgFileStream,
Collection exceptions) throws Exception {
processConfigFile(cfgFileStream, exceptions, SmackInitialization.class.getClassLoader());
}
public static void processConfigFile(InputStream cfgFileStream,
Collection exceptions, ClassLoader classLoader) throws Exception {
XmlPullParser parser = PacketParserUtils.getParserFor(cfgFileStream);
XmlPullParser.Event eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.Event.START_ELEMENT) {
if (parser.getName().equals("startupClasses")) {
parseClassesToLoad(parser, false, exceptions, classLoader);
}
else if (parser.getName().equals("optionalStartupClasses")) {
parseClassesToLoad(parser, true, exceptions, classLoader);
}
}
eventType = parser.next();
}
while (eventType != XmlPullParser.Event.END_DOCUMENT);
CloseableUtil.maybeClose(cfgFileStream, LOGGER);
}
private static void parseClassesToLoad(XmlPullParser parser, boolean optional,
Collection exceptions, ClassLoader classLoader)
throws Exception {
final String startName = parser.getName();
XmlPullParser.Event eventType;
outerloop: do {
eventType = parser.next();
if (eventType == XmlPullParser.Event.START_ELEMENT && "className".equals(parser.getName())) {
String classToLoad = parser.nextText();
if (SmackConfiguration.isDisabledSmackClass(classToLoad)) {
continue outerloop;
}
try {
loadSmackClass(classToLoad, optional, classLoader);
} catch (Exception e) {
// Don't throw the exception if an exceptions collection is given, instead
// record it there. This is used for unit testing purposes.
if (exceptions != null) {
exceptions.add(e);
} else {
throw e;
}
}
}
}
while (!(eventType == XmlPullParser.Event.END_ELEMENT && startName.equals(parser.getName())));
}
private static void loadSmackClass(String className, boolean optional, ClassLoader classLoader) throws Exception {
Class initClass;
try {
// Attempt to load and initialize the class so that all static initializer blocks of
// class are executed
initClass = Class.forName(className, true, classLoader);
}
catch (ClassNotFoundException cnfe) {
Level logLevel;
if (optional) {
logLevel = Level.FINE;
}
else {
logLevel = Level.WARNING;
}
LOGGER.log(logLevel, "A startup class '" + className + "' could not be loaded.");
if (!optional) {
throw cnfe;
} else {
return;
}
}
if (SmackInitializer.class.isAssignableFrom(initClass)) {
SmackInitializer initializer = (SmackInitializer) initClass.getConstructor().newInstance();
List exceptions = initializer.initialize();
if (exceptions == null || exceptions.size() == 0) {
LOGGER.log(Level.FINE, "Loaded SmackInitializer " + className);
} else {
for (Exception e : exceptions) {
LOGGER.log(Level.SEVERE, "Exception in loadSmackClass", e);
}
}
} else {
LOGGER.log(Level.FINE, "Loaded " + className);
}
}
}