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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.catalina.webresources;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.WebResource;
import org.apache.catalina.WebResourceRoot;
import org.apache.catalina.util.ResourceSet;
/**
* Represents a {@link org.apache.catalina.WebResourceSet} based on a JAR file.
*/
public class JarResourceSet extends AbstractResourceSet {
private HashMap jarFileEntries = new HashMap<>();
private String baseUrl;
private final String internalPath;
/**
* Creates a new {@link org.apache.catalina.WebResourceSet} based on a JAR
* file.
*
* @param root The {@link WebResourceRoot} this new
* {@link org.apache.catalina.WebResourceSet} will
* be added to.
* @param base The absolute path to the JAR file on the file system
* from which the resources will be served.
* @param webAppMount The path within the web application at which this
* {@link org.apache.catalina.WebResourceSet} will
* be mounted.
* @param internalPath The path within this new {@link
* org.apache.catalina.WebResourceSet} where
* resources will be served from. E.g. for a
* resource JAR, this would be "META-INF/resources"
*/
public JarResourceSet(WebResourceRoot root, String base, String webAppMount,
String internalPath) throws IllegalArgumentException {
setRoot(root);
setBase(base);
setWebAppMount(webAppMount);
this.internalPath = checkInternalPath(internalPath);
if (getRoot().getState().isAvailable()) {
try {
start();
} catch (LifecycleException e) {
throw new IllegalStateException(e);
}
}
}
@Override
public WebResource getResource(String path) {
checkPath(path);
String webAppMount = getWebAppMount();
WebResourceRoot root = getRoot();
/*
* Implementation notes
*
* The path parameter passed into this method always starts with '/'.
*
* The path parameter passed into this method may or may not end with a
* '/'. JarFile.getEntry() will return a matching directory entry
* whether or not the name ends in a '/'. However, if the entry is
* requested without the '/' subsequent calls to JarEntry.isDirectory()
* will return false.
*
* Paths in JARs never start with '/'. Leading '/' need to be removed
* before any JarFile.getEntry() call.
*/
// If the JAR has been mounted below the web application root, return
// an empty resource for requests outside of the mount point.
if (path.startsWith(webAppMount)) {
String pathInJar = internalPath + path.substring(
webAppMount.length(), path.length());
// Always strip off the leading '/' to get the JAR path
if (pathInJar.charAt(0) == '/') {
pathInJar = pathInJar.substring(1);
}
if (pathInJar.equals("")) {
// Special case
return new JarResourceRoot(root, new File(getBase()),
pathInJar, path);
} else {
JarEntry jarEntry = null;
if (!(pathInJar.charAt(pathInJar.length() - 1) == '/')) {
jarEntry = jarFileEntries.get(pathInJar + '/');
if (jarEntry != null) {
path = path + '/';
}
}
if (jarEntry == null) {
jarEntry = jarFileEntries.get(pathInJar);
}
if (jarEntry == null) {
return new EmptyResource(root, path);
} else {
return new JarResource(root, getBase(), baseUrl, jarEntry,
internalPath, path);
}
}
} else {
return new EmptyResource(root, path);
}
}
@Override
public String[] list(String path) {
checkPath(path);
String webAppMount = getWebAppMount();
ArrayList result = new ArrayList<>();
if (path.startsWith(webAppMount)) {
String pathInJar =
internalPath + path.substring(webAppMount.length());
// Always strip off the leading '/' to get the JAR path
if (pathInJar.charAt(0) == '/') {
pathInJar = pathInJar.substring(1);
}
Iterator entries = jarFileEntries.keySet().iterator();
while (entries.hasNext()) {
String name = entries.next();
if (name.length() > pathInJar.length() &&
name.startsWith(pathInJar)) {
if (name.charAt(name.length() - 1) == '/') {
name = name.substring(
pathInJar.length(), name.length() - 1);
} else {
name = name.substring(pathInJar.length());
}
if (name.length() == 0) {
continue;
}
if (name.charAt(0) == '/') {
name = name.substring(1);
}
if (name.length() > 0 && name.lastIndexOf('/') == -1) {
result.add(name);
}
}
}
} else {
if (!path.endsWith("/")) {
path = path + "/";
}
if (webAppMount.startsWith(path)) {
int i = webAppMount.indexOf('/', path.length());
if (i == -1) {
return new String[] {webAppMount.substring(path.length())};
} else {
return new String[] {
webAppMount.substring(path.length(), i)};
}
}
}
return result.toArray(new String[result.size()]);
}
@Override
public Set listWebAppPaths(String path) {
checkPath(path);
String webAppMount = getWebAppMount();
ResourceSet result = new ResourceSet<>();
if (path.startsWith(webAppMount)) {
String pathInJar =
internalPath + path.substring(webAppMount.length());
// Always strip off the leading '/' to get the JAR path and make
// sure it ends in '/'
if (pathInJar.charAt(pathInJar.length() - 1) != '/') {
pathInJar = pathInJar.substring(1) + '/';
}
if (pathInJar.charAt(0) == '/') {
pathInJar = pathInJar.substring(1);
}
Iterator entries = jarFileEntries.keySet().iterator();
while (entries.hasNext()) {
String name = entries.next();
if (name.length() > pathInJar.length() &&
name.startsWith(pathInJar)) {
int nextSlash = name.indexOf('/', pathInJar.length());
if (nextSlash == -1 || nextSlash == name.length() - 1) {
if (name.startsWith(pathInJar)) {
result.add(webAppMount + '/' +
name.substring(internalPath.length()));
}
}
}
}
} else {
if (!path.endsWith("/")) {
path = path + "/";
}
if (webAppMount.startsWith(path)) {
int i = webAppMount.indexOf('/', path.length());
if (i == -1) {
result.add(webAppMount + "/");
} else {
result.add(webAppMount.substring(0, i + 1));
}
}
}
result.setLocked(true);
return result;
}
@Override
public boolean mkdir(String path) {
checkPath(path);
return false;
}
@Override
public boolean write(String path, InputStream is, boolean overwrite) {
checkPath(path);
if (is == null) {
throw new NullPointerException(
sm.getString("dirResourceSet.writeNpe"));
}
return false;
}
//-------------------------------------------------------- Lifecycle methods
@Override
protected void initInternal() throws LifecycleException {
try (JarFile jarFile = new JarFile(getBase())) {
Enumeration entries = jarFile.entries();
while (entries.hasMoreElements()) {
JarEntry entry = entries.nextElement();
jarFileEntries.put(entry.getName(), entry);
}
} catch (IOException ioe) {
throw new IllegalArgumentException(ioe);
}
try {
this.baseUrl = (new File(getBase())).toURI().toURL().toString();
} catch (MalformedURLException e) {
throw new IllegalArgumentException(e);
}
}
}
