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Merge pull request #3 from nbaars/fixing-classloader-issue

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Fixed classloading issues when a lesson contains an inner class. The plu...
This commit is contained in:
mayhew64 2015-05-04 12:37:34 -04:00
commit 717f4a3258
2 changed files with 47 additions and 24 deletions
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37
src/main/java/org/owasp/webgoat/plugins/Plugin.java
View File

@ -50,27 +50,24 @@ public class Plugin {
}
public void loadClasses(Map<String, byte[]> classes) {
ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
PluginClassLoader pluginClassLoader = new PluginClassLoader(contextClassLoader);
for (Map.Entry<String, byte[]> clazz : classes.entrySet()) {
loadClass(clazz.getKey(), clazz.getValue());
loadClass(pluginClassLoader, clazz.getKey(), clazz.getValue());
}
if (lesson == null) {
throw new PluginLoadingFailure(String
.format("Lesson class not found, following classes were detected in the plugin: %s",
StringUtils.collectionToCommaDelimitedString(classes.keySet())));
.format("Lesson class not found, following classes were detected in the plugin: %s",
StringUtils.collectionToCommaDelimitedString(classes.keySet())));
}
}
private void loadClass(String name, byte[] classFile) {
ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
PluginClassLoader pluginClassLoader = new PluginClassLoader(contextClassLoader, name, classFile);
try {
String realClassName = name.replaceFirst("/", "").replaceAll("/", ".").replaceAll(".class", "");
Class clazz = pluginClassLoader.loadClass(realClassName);
if (AbstractLesson.class.isAssignableFrom(clazz)) {
this.lesson = clazz;
}
} catch (ClassNotFoundException e) {
logger.error("Unable to load class {}", name, e);
private void loadClass(PluginClassLoader pluginClassLoader, String name, byte[] classFile) {
String realClassName = name.replaceFirst("/", "").replaceAll("/", ".").replaceAll(".class", "");
Class clazz = pluginClassLoader.loadClass(realClassName, classFile);
if (AbstractLesson.class.isAssignableFrom(clazz)) {
this.lesson = clazz;
}
}
@ -97,7 +94,7 @@ public class Plugin {
Files.copy(file, bos);
Path propertiesPath = createPropertiesDirectory();
ResourceBundleClassLoader.setPropertiesPath(propertiesPath);
if ( reload ) {
if (reload) {
Files.write(propertiesPath.resolve(file.getFileName()), bos.toByteArray(), CREATE, APPEND);
} else {
Files.write(propertiesPath.resolve(file.getFileName()), bos.toByteArray(), CREATE, TRUNCATE_EXISTING);
@ -117,8 +114,14 @@ public class Plugin {
public void rewritePaths(Path pluginTarget) {
try {
PluginFileUtils.replaceInFiles(this.lesson.getSimpleName() + "_files", pluginTarget.getFileName().toString() + "/plugin/" + this.lesson.getSimpleName() + "/lessonSolutions/en/" + this.lesson.getSimpleName() + "_files", solutionLanguageFiles.values());
PluginFileUtils.replaceInFiles(this.lesson.getSimpleName() + "_files", pluginTarget.getFileName().toString() + "/plugin/" + this.lesson.getSimpleName() + "/lessonPlans/en/" + this.lesson.getSimpleName() + "_files", lessonPlansLanguageFiles.values());
PluginFileUtils.replaceInFiles(this.lesson.getSimpleName() + "_files",
pluginTarget.getFileName().toString() + "/plugin/" + this.lesson
.getSimpleName() + "/lessonSolutions/en/" + this.lesson.getSimpleName() + "_files",
solutionLanguageFiles.values());
PluginFileUtils.replaceInFiles(this.lesson.getSimpleName() + "_files",
pluginTarget.getFileName().toString() + "/plugin/" + this.lesson
.getSimpleName() + "/lessonPlans/en/" + this.lesson.getSimpleName() + "_files",
lessonPlansLanguageFiles.values());
} catch (IOException e) {
throw new PluginLoadingFailure("Unable to rewrite the paths in the solutions", e);
}

34
src/main/java/org/owasp/webgoat/plugins/PluginClassLoader.java
View File

@ -1,22 +1,42 @@
package org.owasp.webgoat.plugins;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.collect.FluentIterable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
public class PluginClassLoader extends ClassLoader {
private final List<Class<?>> classes = new ArrayList<>();
private final Logger logger = LoggerFactory.getLogger(Plugin.class);
private final byte[] classFile;
public PluginClassLoader(ClassLoader parent, String nameOfClass, byte[] classFile) {
super(parent);
logger.debug("Creating class loader for {}", nameOfClass);
this.classFile = classFile;
public Class<?> loadClass(String nameOfClass, byte[] classFile) {
Class<?> clazz = defineClass(nameOfClass, classFile, 0, classFile.length);
classes.add(clazz);
return clazz;
}
public Class findClass(String name) {
public PluginClassLoader(ClassLoader contextClassLoader) {
super(contextClassLoader);
}
public Class findClass(final String name) throws ClassNotFoundException {
logger.debug("Finding class " + name);
return defineClass(name, classFile, 0, classFile.length);
Optional<Class<?>> foundClass = FluentIterable.from(classes)
.firstMatch(new Predicate<Class<?>>() {
@Override
public boolean apply(Class<?> clazz) {
return clazz.getName().equals(name);
}
});
if (foundClass.isPresent()) {
return foundClass.get();
}
throw new ClassNotFoundException("Class " + name + " not found");
}
}