/*
* Copyright 2014 Jeanfrancois Arcand
*
* 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.atmosphere.nettosphere.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.net.URLClassLoader;
import java.nio.channels.FileChannel;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
public class Utils {
public final static URLClassLoader createURLClassLoader(String dirPath) throws IOException {
String path;
File file;
URL appRoot;
URL classesURL;
if (!dirPath.endsWith("/") &&
!dirPath.endsWith(".war") &&
!dirPath.endsWith(".jar")) {
dirPath += File.separator;
}
//Must be a better way because that sucks!
String separator = (System.getProperty("os.name").toLowerCase().startsWith("win") ? "/" : "//");
if (dirPath != null &&
(dirPath.endsWith(".war") || dirPath.endsWith(".jar"))) {
file = new File(dirPath);
appRoot = new URL("jar:file:" + separator +
file.getCanonicalPath().replace('\\', '/') + "!/");
classesURL = new URL("jar:file:" + separator +
file.getCanonicalPath().replace('\\', '/') + "!/WEB-INF/classes/");
path = expand(appRoot);
//DEBUG
//classesURL = new URL("file:/" + path + "WEB-INF/classes/");
//appRoot = new URL("file:/" + path);
} else {
path = dirPath;
classesURL = new URL("file://" + path + "WEB-INF/classes/");
appRoot = new URL("file://" + path);
}
String absolutePath = new File(path).getAbsolutePath();
URL[] urls;
File libFiles = new File(absolutePath + File.separator + "WEB-INF" + File.separator + "lib");
int arraySize = 4;
if (libFiles.exists() && libFiles.isDirectory()) {
urls = new URL[libFiles.listFiles().length + arraySize];
for (int i = 0; i < libFiles.listFiles().length; i++) {
urls[i] = new URL("jar:file:" + separator + libFiles.listFiles()[i].toString().replace('\\', '/') + "!/");
}
} else {
urls = new URL[arraySize];
}
urls[urls.length - 1] = classesURL;
urls[urls.length - 2] = appRoot;
urls[urls.length - 3] = new URL("file://" + path + "/WEB-INF/classes/");
urls[urls.length - 4] = new URL("file://" + path);
return new URLClassLoader(urls, Thread.currentThread().getContextClassLoader());
}
/**
* 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.
* @throws IllegalArgumentException if this is not a "jar:" URL
* @throws 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.
* @throws IllegalArgumentException if this is not a "jar:" URL
* @throws 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.
* @throws IllegalArgumentException if this is not a "jar:" URL
* @throws 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<JarEntry> 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());
}
/**
* 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
* @throws 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
}
}
}
}
/**
* 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();
}
/**
* 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[] = null;
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;
}
}