org.apache.felix.framework.cache.JarRevision Maven / Gradle / Ivy
/*
* 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.felix.framework.cache;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.ref.SoftReference;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;
import java.util.zip.ZipEntry;
import org.apache.felix.framework.Logger;
import org.apache.felix.framework.util.StringMap;
import org.apache.felix.framework.util.Util;
import org.apache.felix.framework.util.WeakZipFileFactory;
import org.apache.felix.framework.util.WeakZipFileFactory.WeakZipFile;
/**
*
* This class implements a bundle archive revision for a standard bundle
* JAR file. The specified location is the URL of the JAR file. By default,
* the associated JAR file is copied into the revision's directory on the
* file system, but it is possible to mark the JAR as 'by reference', which
* will result in the bundle JAR be used 'in place' and not being copied. In
* either case, some of the contents may be extracted into the revision
* directory, such as embedded JAR files and native libraries.
*
**/
class JarRevision extends BundleArchiveRevision
{
private static final transient String BUNDLE_JAR_FILE = "bundle.jar";
private final WeakZipFileFactory m_zipFactory;
private final File m_bundleFile;
private final WeakZipFile m_zipFile;
public JarRevision(
Logger logger, Map configMap, WeakZipFileFactory zipFactory,
File revisionRootDir, String location, boolean byReference, InputStream is)
throws Exception
{
super(logger, configMap, revisionRootDir, location);
m_zipFactory = zipFactory;
if (byReference)
{
m_bundleFile = new File(location.substring(
location.indexOf(BundleArchive.FILE_PROTOCOL)
+ BundleArchive.FILE_PROTOCOL.length()));
}
else
{
m_bundleFile = new File(getRevisionRootDir(), BUNDLE_JAR_FILE);
}
// Save and process the bundle JAR.
initialize(byReference, is);
// Open shared copy of the JAR file.
WeakZipFile zipFile = null;
try
{
// Open bundle JAR file.
zipFile = m_zipFactory.create(m_bundleFile);
// Error if no jar file.
if (zipFile == null)
{
throw new IOException("No JAR file found.");
}
m_zipFile = zipFile;
}
catch (Exception ex)
{
if (zipFile != null) zipFile.close();
throw ex;
}
}
public Map getManifestHeader() throws Exception
{
// Create a case insensitive map of manifest attributes.
Map headers = new StringMap();
// Read and parse headers.
getMainAttributes(headers, m_zipFile);
return headers;
}
public synchronized Content getContent() throws Exception
{
return new JarContent(getLogger(), getConfig(), m_zipFactory,
this, getRevisionRootDir(), m_bundleFile, m_zipFile);
}
protected void close() throws Exception
{
m_zipFile.close();
}
//
// Private methods.
//
private void initialize(boolean byReference, InputStream is)
throws Exception
{
try
{
// If the revision directory does not exist, then create it.
if (!BundleCache.getSecureAction().fileExists(getRevisionRootDir()))
{
if (!BundleCache.getSecureAction().mkdir(getRevisionRootDir()))
{
getLogger().log(
Logger.LOG_ERROR,
getClass().getName() + ": Unable to create revision directory.");
throw new IOException("Unable to create archive directory.");
}
if (!byReference)
{
URLConnection conn = null;
try
{
if (is == null)
{
// Do it the manual way to have a chance to
// set request properties such as proxy auth.
URL url = BundleCache.getSecureAction().createURL(
null, getLocation(), null);
conn = url.openConnection();
// Support for http proxy authentication.
String auth = BundleCache.getSecureAction()
.getSystemProperty("http.proxyAuth", null);
if ((auth != null) && (auth.length() > 0))
{
if ("http".equals(url.getProtocol()) ||
"https".equals(url.getProtocol()))
{
String base64 = Util.base64Encode(auth);
conn.setRequestProperty(
"Proxy-Authorization", "Basic " + base64);
}
}
is = BundleCache.getSecureAction()
.getURLConnectionInputStream(conn);
}
// Save the bundle jar file.
BundleCache.copyStreamToFile(is, m_bundleFile);
}
finally
{
// This is a hack to fix an issue on Android, where
// HttpURLConnections are not properly closed. (FELIX-2728)
if ((conn != null) && (conn instanceof HttpURLConnection))
{
((HttpURLConnection) conn).disconnect();
}
}
}
}
}
finally
{
if (is != null) is.close();
}
}
private static final ThreadLocal m_defaultBuffer = new ThreadLocal();
private static final int DEFAULT_BUFFER = 1024 * 64;
// Parse the main attributes of the manifest of the given jarfile.
// The idea is to not open the jar file as a java.util.jarfile but
// read the mainfest from the zipfile directly and parse it manually
// to use less memory and be faster.
private static void getMainAttributes(Map result, WeakZipFile zipFile) throws Exception
{
ZipEntry entry = zipFile.getEntry("META-INF/MANIFEST.MF");
// Get a buffer for this thread if there is one already otherwise,
// create one of size DEFAULT_BUFFER (64K) if the manifest is less
// than 64k or of the size of the manifest.
SoftReference ref = (SoftReference) m_defaultBuffer.get();
byte[] bytes = null;
if (ref != null)
{
bytes = (byte[]) ref.get();
}
int size = (int) entry.getSize();
if (bytes == null)
{
bytes = new byte[size > DEFAULT_BUFFER ? size : DEFAULT_BUFFER];
m_defaultBuffer.set(new SoftReference(bytes));
}
else if (size > bytes.length)
{
bytes = new byte[size];
m_defaultBuffer.set(new SoftReference(bytes));
}
// Now read in the manifest in one go into the bytes array.
// The InputStream is already
// buffered and can handle up to 64K buffers in one go.
InputStream is = null;
try
{
is = zipFile.getInputStream(entry);
int i = is.read(bytes);
while (i < size)
{
i += is.read(bytes, i, bytes.length - i);
}
}
finally
{
is.close();
}
// Now parse the main attributes. The idea is to do that
// without creating new byte arrays. Therefore, we read through
// the manifest bytes inside the bytes array and write them back into
// the same array unless we don't need them (e.g., \r\n and \n are skipped).
// That allows us to create the strings from the bytes array without the skipped
// chars. We stopp as soon as we see a blankline as that denotes that the main
//attributes part is finished.
String key = null;
int last = 0;
int current = 0;
for (int i = 0; i < size; i++)
{
// skip \r and \n if it is follows by another \n
// (we catch the blank line case in the next iteration)
if (bytes[i] == '\r')
{
if ((i + 1 < size) && (bytes[i + 1] == '\n'))
{
continue;
}
}
if (bytes[i] == '\n')
{
if ((i + 1 < size) && (bytes[i + 1] == ' '))
{
i++;
continue;
}
}
// If we don't have a key yet and see the first : we parse it as the key
// and skip the : that follows it.
if ((key == null) && (bytes[i] == ':'))
{
key = new String(bytes, last, (current - last), "UTF-8");
if ((i + 1 < size) && (bytes[i + 1] == ' '))
{
last = current + 1;
continue;
}
else
{
throw new Exception(
"Manifest error: Missing space separator - " + key);
}
}
// if we are at the end of a line
if (bytes[i] == '\n')
{
// and it is a blank line stop parsing (main attributes are done)
if ((last == current) && (key == null))
{
break;
}
// Otherwise, parse the value and add it to the map (we throw an
// exception if we don't have a key or the key already exist.
String value = new String(bytes, last, (current - last), "UTF-8");
if (key == null)
{
throw new Exception("Manifst error: Missing attribute name - " + value);
}
else if (result.put(key, value) != null)
{
throw new Exception("Manifst error: Duplicate attribute name - " + key);
}
last = current;
key = null;
}
else
{
// write back the byte if it needs to be included in the key or the value.
bytes[current++] = bytes[i];
}
}
}
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