org.glassfish.grizzly.http.server.util.ExpandJar Maven / Gradle / Ivy
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/*
* Copyright (c) 2008, 2020 Oracle and/or its affiliates. All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* 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.glassfish.grizzly.http.server.util;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.JarURLConnection;
import java.net.URL;
import java.nio.channels.FileChannel;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
/**
* Expand out a jar. Adapted from Tomcat's org.apache.catalina.startup.ExpendWar classes
*
* @author Jeanfrancois Arcand
*/
public class ExpandJar {
/**
* Expand the jar file found at the specified URL into an unpacked directory structure, and return the absolute pathname
* to the expanded directory.
*
* @param jar URL of the web application archive to be expanded (must start with "jar:")
*
* @return Absolute path as in {@link java.io.File#getAbsolutePath()} of location where to find expanded jar.
* @exception IllegalArgumentException if this is not a "jar:" URL
* @exception IOException if an input/output error was encountered during expansion
*/
public static String expand(URL jar) throws IOException {
return expand(jar, System.getProperty("java.io.tmpdir"));
}
/**
* Expand the jar file found at the specified URL into an unpacked directory structure, and return the absolute pathname
* to the expanded directory.
*
* @param jar URL of the web application archive to be expanded (must start with "jar:")
*
* @param workFolder the folder where the file will be expanded
*
* @return Absolute path as in {@link java.io.File#getAbsolutePath()} of location where to find expanded jar.
* @exception IllegalArgumentException if this is not a "jar:" URL
* @exception IOException if an input/output error was encountered during expansion
*/
public static String expand(URL jar, String workFolder) throws IOException {
// Calculate the directory name of the expanded directory
String pathname = jar.toString().replace('\\', '/');
if (pathname.endsWith("!/")) {
pathname = pathname.substring(0, pathname.length() - 2);
}
int period = pathname.lastIndexOf('.');
if (period >= pathname.length() - 4) {
pathname = pathname.substring(0, period);
}
int slash = pathname.lastIndexOf('/');
if (slash >= 0) {
pathname = pathname.substring(slash + 1);
}
return expand(jar, pathname, workFolder);
}
/**
* Expand the jar file found at the specified URL into an unpacked directory structure, and return the absolute pathname
* to the expanded directory.
*
* @param jar URL of the web application archive to be expanded (must start with "jar:")
* @param pathname Context path name for web application
*
* @return Absolute path as in {@link java.io.File#getAbsolutePath()} of location where to find expanded jar.
* @exception IllegalArgumentException if this is not a "jar:" URL
* @exception IOException if an input/output error was encountered during expansion
*/
public static String expand(URL jar, String pathname, String dirname) throws IOException {
// Make sure that there is no such directory already existing
File appBase = new File(dirname);
File docBase = new File(appBase, pathname);
// Create the new document base directory
if (!docBase.mkdir()) {
throw new IllegalStateException(String.format("Unable to create directory: %s", docBase.getAbsolutePath()));
}
// Expand the jar into the new document base directory
JarURLConnection juc = (JarURLConnection) jar.openConnection();
juc.setUseCaches(false);
JarFile jarFile = null;
InputStream input = null;
try {
jarFile = juc.getJarFile();
Enumeration jarEntries = jarFile.entries();
while (jarEntries.hasMoreElements()) {
JarEntry jarEntry = jarEntries.nextElement();
String name = jarEntry.getName();
int last = name.lastIndexOf('/');
if (last >= 0) {
File parent = new File(docBase, name.substring(0, last));
if (!parent.mkdirs()) {
throw new IllegalStateException(String.format("Unable to create directory: %s", parent.getAbsolutePath()));
}
}
if (name.endsWith("/")) {
continue;
}
input = jarFile.getInputStream(jarEntry);
expand(input, docBase, name);
input.close();
input = null;
}
} catch (IOException e) {
// If something went wrong, delete expanded dir to keep things
// clean
deleteDir(docBase);
throw e;
} finally {
if (input != null) {
try {
input.close();
} catch (Throwable ignored) {
}
input = null;
}
if (jarFile != null) {
try {
jarFile.close();
} catch (Throwable ignored) {
}
jarFile = null;
}
}
// Return the absolute path to our new document base directory
return docBase.getAbsolutePath();
}
/**
* Copy the specified file or directory to the destination.
*
* @param src File object representing the source
* @param dest File object representing the destination
*/
public static boolean copy(File src, File dest) {
boolean result = true;
String files[];
if (src.isDirectory()) {
files = src.list();
result = dest.mkdir();
} else {
files = new String[1];
files[0] = "";
}
if (files == null) {
files = new String[0];
}
for (int i = 0; i < files.length && result; i++) {
File fileSrc = new File(src, files[i]);
File fileDest = new File(dest, files[i]);
if (fileSrc.isDirectory()) {
result = copy(fileSrc, fileDest);
} else {
FileChannel ic = null;
FileChannel oc = null;
try {
ic = new FileInputStream(fileSrc).getChannel();
oc = new FileOutputStream(fileDest).getChannel();
ic.transferTo(0, ic.size(), oc);
} catch (IOException e) {
result = false;
} finally {
if (ic != null) {
try {
ic.close();
} catch (IOException ignored) {
}
}
if (oc != null) {
try {
oc.close();
} catch (IOException ignored) {
}
}
}
}
}
return result;
}
/**
* Delete the specified directory, including all of its contents and subdirectories recursively.
*
* @param dir File object representing the directory to be deleted
*/
public static boolean delete(File dir) {
if (dir.isDirectory()) {
return deleteDir(dir);
} else {
return dir.delete();
}
}
/**
* Delete the specified directory, including all of its contents and subdirectories recursively.
*
* @param dir File object representing the directory to be deleted
*/
public static boolean deleteDir(File dir) {
String files[] = dir.list();
if (files == null) {
files = new String[0];
}
for (int i = 0; i < files.length; i++) {
File file = new File(dir, files[i]);
if (file.isDirectory()) {
deleteDir(file);
} else {
if (!file.delete()) {
throw new IllegalStateException(String.format("Unable to delete file: %s", file.getAbsolutePath()));
}
}
}
return dir.delete();
}
/**
* Expand the specified input stream into the specified directory, creating a file named from the specified relative
* path.
*
* @param input InputStream to be copied
* @param docBase Document base directory into which we are expanding
* @param name Relative pathname of the file to be created
*
* @exception IOException if an input/output error occurs
*/
protected static void expand(InputStream input, File docBase, String name) throws IOException {
File file = new File(docBase, name);
BufferedOutputStream output = null;
try {
output = new BufferedOutputStream(new FileOutputStream(file));
byte buffer[] = new byte[2048];
while (true) {
int n = input.read(buffer);
if (n <= 0) {
break;
}
output.write(buffer, 0, n);
}
} finally {
if (output != null) {
try {
output.close();
} catch (IOException ignored) {
// Ignore
}
}
}
}
}
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