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/*
* Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.webkit.network;
import static com.sun.webkit.network.URLs.newURL;
import java.net.MalformedURLException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Arrays;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import com.sun.javafx.logging.PlatformLogger;
import com.sun.javafx.logging.PlatformLogger.Level;
import com.sun.webkit.WebPage;
import java.security.Permission;
final class NetworkContext {
private static final PlatformLogger logger =
PlatformLogger.getLogger(NetworkContext.class.getName());
/**
* The size of the thread pool for asynchronous loaders.
*/
private static final int THREAD_POOL_SIZE = 20;
/**
* The thread pool keep alive time.
*/
private static final long THREAD_POOL_KEEP_ALIVE_TIME = 10000L;
/**
* The default value of the "http.maxConnections" system property.
*/
private static final int DEFAULT_HTTP_MAX_CONNECTIONS = 5;
/**
* The default value of the maximum concurrent connections for
* new gen HTTP2 client
*/
private static final int DEFAULT_HTTP2_MAX_CONNECTIONS = 20;
/**
* The buffer size for the shared pool of byte buffers.
*/
private static final int BYTE_BUFFER_SIZE = 1024 * 40;
/**
* The thread pool used to execute asynchronous loaders.
*/
private static final ThreadPoolExecutor threadPool;
/**
* Can use HTTP2Loader
*/
private static final boolean useHTTP2Loader;
static {
threadPool = new ThreadPoolExecutor(
THREAD_POOL_SIZE,
THREAD_POOL_SIZE,
THREAD_POOL_KEEP_ALIVE_TIME,
TimeUnit.MILLISECONDS,
new LinkedBlockingQueue(),
new URLLoaderThreadFactory());
threadPool.allowCoreThreadTimeOut(true);
useHTTP2Loader = AccessController.doPrivileged((PrivilegedAction) () -> {
// Use HTTP2 by default on JDK 12 or later
final var version = Runtime.Version.parse(System.getProperty("java.version"));
final String defaultUseHTTP2 = version.feature() >= 12 ? "true" : "false";
return Boolean.valueOf(System.getProperty("com.sun.webkit.useHTTP2Loader", defaultUseHTTP2));
});
}
/**
* The shared pool of byte buffers.
*/
private static final ByteBufferPool byteBufferPool =
ByteBufferPool.newInstance(BYTE_BUFFER_SIZE);
/**
* Non-invocable constructor.
*/
private NetworkContext() {
throw new AssertionError();
}
/**
* Checks whether a URL is valid or not. I.E. if we do have a protocol
* handler to deal with it.
*
* @param url the String containing the url to check.
* @return true if we can handle the url. false
* otherwise.
*/
private static boolean canHandleURL(String url) {
java.net.URL u = null;
try {
u = newURL(url);
} catch (MalformedURLException malformedURLException) {
}
return u != null;
}
/**
* Starts an asynchronous load or executes a synchronous one.
*/
private static URLLoaderBase fwkLoad(WebPage webPage,
boolean asynchronous,
String url,
String method,
String headers,
FormDataElement[] formDataElements,
long data)
{
if (logger.isLoggable(Level.FINEST)) {
logger.finest(String.format(
"webPage: [%s], " +
"asynchronous: [%s], " +
"url: [%s], " +
"method: [%s], " +
"formDataElements: %s, " +
"data: [0x%016X], " +
"headers:%n%s",
webPage,
asynchronous,
url,
method,
formDataElements != null
? Arrays.asList(formDataElements) : "[null]",
data,
Util.formatHeaders(headers)));
}
if (useHTTP2Loader) {
final URLLoaderBase loader = HTTP2Loader.create(
webPage,
byteBufferPool,
asynchronous,
url,
method,
headers,
formDataElements,
data);
if (loader != null) {
return loader;
}
}
URLLoader loader = new URLLoader(
webPage,
byteBufferPool,
asynchronous,
url,
method,
headers,
formDataElements,
data);
if (asynchronous) {
threadPool.submit(loader);
if (logger.isLoggable(Level.FINEST)) {
logger.finest(
"active count: [{0}], " +
"pool size: [{1}], " +
"max pool size: [{2}], " +
"task count: [{3}], " +
"completed task count: [{4}]",
new Object[] {
threadPool.getActiveCount(),
threadPool.getPoolSize(),
threadPool.getMaximumPoolSize(),
threadPool.getTaskCount(),
threadPool.getCompletedTaskCount()});
}
return loader;
} else {
loader.run();
return null;
}
}
/**
* Returns the maximum allowed number of connections per host.
*/
private static int fwkGetMaximumHTTPConnectionCountPerHost() {
// Our implementation employs HttpURLConnection for all
// HTTP exchanges, so return the value of the "http.maxConnections"
// system property.
int propValue = AccessController.doPrivileged(
(PrivilegedAction) () -> Integer.getInteger("http.maxConnections", -1));
if (useHTTP2Loader) {
return propValue >= 0 ? propValue : DEFAULT_HTTP2_MAX_CONNECTIONS;
}
return propValue >= 0 ? propValue : DEFAULT_HTTP_MAX_CONNECTIONS;
}
/**
* Thread factory for URL loader threads.
*/
private static final class URLLoaderThreadFactory implements ThreadFactory {
private final ThreadGroup group;
private final AtomicInteger index = new AtomicInteger(1);
// Need to assert the modifyThread and modifyThreadGroup permission when
// creating the thread from the URLLoaderThreadFactory, so we can
// create the thread with the desired ThreadGroup.
// Note that this is needed when running as an applet or a web start app.
private static final Permission modifyThreadGroupPerm = new RuntimePermission("modifyThreadGroup");
private static final Permission modifyThreadPerm = new RuntimePermission("modifyThread");
private URLLoaderThreadFactory() {
SecurityManager sm = System.getSecurityManager();
group = (sm != null) ? sm.getThreadGroup()
: Thread.currentThread().getThreadGroup();
}
@Override
public Thread newThread(Runnable r) {
// Assert the modifyThread and modifyThreadGroup permissions
return
AccessController.doPrivileged((PrivilegedAction) () -> {
Thread t = new Thread(group, r,
"URL-Loader-" + index.getAndIncrement());
t.setDaemon(true);
if (t.getPriority() != Thread.NORM_PRIORITY) {
t.setPriority(Thread.NORM_PRIORITY);
}
return t;
},
null,
modifyThreadGroupPerm, modifyThreadPerm);
}
}
}
