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Jakarta Mail erroneously assumes that classes can be loaded from Thread#getContextClassLoader #701

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merged 14 commits into from
Jan 5, 2024
Merged

Jakarta Mail erroneously assumes that classes can be loaded from Thread#getContextClassLoader #701

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307dcf0
Jakarta Mail erroneously assumes that classes can be loaded from Thre…
jmehrens Nov 12, 2023
c7c7065
Jakarta Mail erroneously assumes that classes can be loaded from Thre…
jmehrens Nov 12, 2023
d50a76f
Handle null classloader as system classloader.
jmehrens Nov 16, 2023
dbc7a3f
Handle null classloader as system classloader.
jmehrens Nov 16, 2023
993a874
Get classloaders in bulk.
jmehrens Nov 19, 2023
ef2697a
Fix default providers.
jmehrens Nov 19, 2023
3762e15
Remove newline.
jmehrens Nov 19, 2023
56377e4
Remove newline.
jmehrens Nov 19, 2023
cca3b26
Add test
jmehrens Nov 19, 2023
ea6b91f
Add test
jmehrens Nov 19, 2023
683898d
Update changes
jmehrens Nov 19, 2023
88a791e
Glassfish can throw IllegalStateException
jmehrens Nov 22, 2023
5acf47b
Add comment
jmehrens Nov 22, 2023
af596c3
Merge branch 'master' into issue_665
jmehrens Jan 4, 2024
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145 changes: 101 additions & 44 deletions api/src/main/java/jakarta/mail/Session.java
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Hashtable;
Expand Down Expand Up @@ -255,7 +256,7 @@ private Session(Properties props, Authenticator authenticator) {
this.authenticator = authenticator;
this.streamProvider = StreamProvider.provider();

if (Boolean.valueOf(props.getProperty("mail.debug")).booleanValue())
if (Boolean.parseBoolean(props.getProperty("mail.debug")))
debug = true;

initLogger();
Expand Down Expand Up @@ -982,21 +983,28 @@ public void load(InputStream is) throws IOException {
} catch (SecurityException ex) {
}

//Fetch classloader of given class, falling back to others if needed.
ClassLoader gcl;
ClassLoader[] loaders = getClassLoaders(cl, Thread.class, System.class);
if (loaders.length != 0) {
gcl = loaders[0];
} else {
gcl = getContextClassLoader(); //Fail safe
}

// next, add all the non-default services
ServiceLoader<Provider> sl = ServiceLoader.load(Provider.class);
ServiceLoader<Provider> sl = ServiceLoader.load(Provider.class, gcl);
for (Provider p : sl) {
if (!containsDefaultProvider(p))
addProvider(p);
}

// + handle Glassfish/OSGi (platform specific default)
if (isHk2Available()) {
Iterator<Provider> iter = lookupUsingHk2ServiceLoader(Provider.class.getName());
while (iter.hasNext()) {
Provider p = iter.next();
if (!containsDefaultProvider(p))
addProvider(p);
}
Iterator<Provider> iter = lookupUsingHk2ServiceLoader(Provider.class, gcl);
while (iter.hasNext()) {
Provider p = iter.next();
if (!containsDefaultProvider(p))
addProvider(p);
}

// load the META-INF/javamail.providers file supplied by an application
Expand All @@ -1006,46 +1014,44 @@ public void load(InputStream is) throws IOException {
loadResource("/META-INF/javamail.default.providers", cl, loader, false);

// finally, add all the default services
sl = ServiceLoader.load(Provider.class);
sl = ServiceLoader.load(Provider.class, gcl);
for (Provider p : sl) {
if (containsDefaultProvider(p))
addProvider(p);
}

// + handle Glassfish/OSGi (platform specific default)
if (isHk2Available()) {
Iterator<Provider> iter = lookupUsingHk2ServiceLoader(Provider.class.getName());
while (iter.hasNext()) {
Provider p = iter.next();
if (containsDefaultProvider(p)) {
addProvider(p);
}
iter = lookupUsingHk2ServiceLoader(Provider.class, gcl);
while (iter.hasNext()) {
Provider p = iter.next();
if (containsDefaultProvider(p)) {
addProvider(p);
}
}

/*
* If we haven't loaded any providers, fake it.
*/
if (providers.size() == 0) {
if (providers.isEmpty()) {
logger.config("failed to load any providers, using defaults");
// failed to load any providers, initialize with our defaults
addProvider(new Provider(Provider.Type.STORE,
"imap", "com.sun.mail.imap.IMAPStore",
"imap", "org.eclipse.angus.mail.imap.IMAPStore",
"Oracle", Version.version));
addProvider(new Provider(Provider.Type.STORE,
"imaps", "com.sun.mail.imap.IMAPSSLStore",
"imaps", "org.eclipse.angus.mail.imap.IMAPSSLStore",
"Oracle", Version.version));
addProvider(new Provider(Provider.Type.STORE,
"pop3", "com.sun.mail.pop3.POP3Store",
"pop3", "org.eclipse.angus.mail.pop3.POP3Store",
"Oracle", Version.version));
addProvider(new Provider(Provider.Type.STORE,
"pop3s", "com.sun.mail.pop3.POP3SSLStore",
"pop3s", "org.eclipse.angus.mail.pop3.POP3SSLStore",
"Oracle", Version.version));
addProvider(new Provider(Provider.Type.TRANSPORT,
"smtp", "com.sun.mail.smtp.SMTPTransport",
"smtp", "org.eclipse.angus.mail.smtp.SMTPTransport",
"Oracle", Version.version));
addProvider(new Provider(Provider.Type.TRANSPORT,
"smtps", "com.sun.mail.smtp.SMTPSSLTransport",
"smtps", "org.eclipse.angus.mail.smtp.SMTPSSLTransport",
"Oracle", Version.version));
}

Expand Down Expand Up @@ -1307,6 +1313,46 @@ public ClassLoader run() {
);
}

private static ClassLoader[] getClassLoaders(final Class<?>... classes) {
return AccessController.doPrivileged(
new PrivilegedAction<ClassLoader[]>() {
@Override
public ClassLoader[] run() {
ClassLoader[] loaders = new ClassLoader[classes.length];
int w = 0;
for (Class<?> k : classes) {
ClassLoader cl = null;
if (k == Thread.class) {
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
} else if (k == System.class) {
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
} else {
try {
cl = k.getClassLoader();
} catch (SecurityException ex) {
}
}

if (cl != null) {
loaders[w++] = cl;
}
}

if (loaders.length != w) {
loaders = Arrays.copyOf(loaders, w);
}
return loaders;
}
}
);
}

private static InputStream getResourceAsStream(final Class<?> c, final String name) throws IOException {
try {
return AccessController.doPrivileged(
Expand Down Expand Up @@ -1386,33 +1432,44 @@ EventQueue getEventQueue() {
return q;
}

private static final String OSGI_SERVICE_LOADER_CLASS_NAME = "org.glassfish.hk2.osgiresourcelocator.ServiceLoader";
private static Class<?>[] getHk2ServiceLoaderTargets(Class<?> factoryClass) {
ClassLoader[] loaders = getClassLoaders(Thread.class, factoryClass, System.class);

private static boolean isHk2Available() {
try {
Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);
return true;
} catch (ClassNotFoundException ignored) {
Class<?>[] classes = new Class<?>[loaders.length];
int w = 0;
for (ClassLoader loader : loaders) {
if (loader != null) {
try {
classes[w++] = Class.forName("org.glassfish.hk2.osgiresourcelocator.ServiceLoader", false, loader);
} catch (Exception | LinkageError ignored) {
} //GlassFish class loaders can throw undocumented exceptions
}
}
return false;

if (classes.length != w) {
classes = Arrays.copyOf(classes, w);
}
return classes;
}

@SuppressWarnings({"unchecked"})
private <T> Iterator<T> lookupUsingHk2ServiceLoader(String factoryId) {
try {
// Use reflection to avoid having any dependency on HK2 ServiceLoader class
Class<?> serviceClass = Class.forName(factoryId);
Class<?>[] args = new Class<?>[]{serviceClass};
Class<?> target = Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);
Method m = target.getMethod("lookupProviderInstances", Class.class);
Iterable<T> result = ((Iterable<T>) m.invoke(null, (Object[]) args));
return result != null ? result.iterator() : Collections.emptyIterator();
} catch (Exception ignored) {
// log and continue
return Collections.emptyIterator();
private <T> Iterator<T> lookupUsingHk2ServiceLoader(Class<T> factoryId, ClassLoader loader) {
for (Class<?> target : getHk2ServiceLoaderTargets(factoryId)) {
try {
// Use reflection to avoid having any dependency on HK2 ServiceLoader class
Class<?> serviceClass = Class.forName(factoryId.getName(), false, loader);
Class<?>[] args = new Class<?>[]{serviceClass};
Method m = target.getMethod("lookupProviderInstances", Class.class);
Iterable<T> result = ((Iterable<T>) m.invoke(null, (Object[]) args));
if (result != null) {
return result.iterator();
}
} catch (Exception ignored) {
// log and continue
}
}
return Collections.emptyIterator();
}

}

/**
Expand Down
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