/* * Copyright (c) 2005, 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.net.httpserver.spi;import java.io.FileDescriptor;import java.io.IOException;import java.net.*;import java.security.AccessController;import java.security.PrivilegedAction;import java.util.Iterator;import sun.misc.Service;import sun.misc.ServiceConfigurationError;import sun.security.action.GetPropertyAction;import com.sun.net.httpserver.*;/** * Service provider class for HttpServer. * Sub-classes of HttpServerProvider provide an implementation of {@link HttpServer} and * associated classes. Applications do not normally use this class. * See {@link #provider()} for how providers are found and loaded. */public abstract class HttpServerProvider { /** * creates a HttpServer from this provider * @param addr the address to bind to. May be <code>null</code> * @param backlog the socket backlog. A value of <code>zero</code> means the systems default */ public abstract HttpServer createHttpServer (InetSocketAddress addr, int backlog) throws IOException; /** * creates a HttpsServer from this provider * @param addr the address to bind to. May be <code>null</code> * @param backlog the socket backlog. A value of <code>zero</code> means the systems default */ public abstract HttpsServer createHttpsServer (InetSocketAddress addr, int backlog) throws IOException; private static final Object lock = new Object(); private static HttpServerProvider provider = null; /** * Initializes a new instance of this class. </p> * * @throws SecurityException * If a security manager has been installed and it denies * {@link RuntimePermission}<tt>("httpServerProvider")</tt> */ protected HttpServerProvider() { SecurityManager sm = System.getSecurityManager(); if (sm != null) sm.checkPermission(new RuntimePermission("httpServerProvider")); } private static boolean loadProviderFromProperty() { String cn = System.getProperty("com.sun.net.httpserver.HttpServerProvider"); if (cn == null) return false; try { Class c = Class.forName(cn, true, ClassLoader.getSystemClassLoader()); provider = (HttpServerProvider)c.newInstance(); return true; } catch (ClassNotFoundException x) { throw new ServiceConfigurationError(x); } catch (IllegalAccessException x) { throw new ServiceConfigurationError(x); } catch (InstantiationException x) { throw new ServiceConfigurationError(x); } catch (SecurityException x) { throw new ServiceConfigurationError(x); } } private static boolean loadProviderAsService() { Iterator i = Service.providers(HttpServerProvider.class, ClassLoader.getSystemClassLoader()); for (;;) { try { if (!i.hasNext()) return false; provider = (HttpServerProvider)i.next(); return true; } catch (ServiceConfigurationError sce) { if (sce.getCause() instanceof SecurityException) { // Ignore the security exception, try the next provider continue; } throw sce; } } } /** * Returns the system wide default HttpServerProvider for this invocation of * the Java virtual machine. * * <p> The first invocation of this method locates the default provider * object as follows: </p> * * <ol> * * <li><p> If the system property * <tt>com.sun.net.httpserver.HttpServerProvider</tt> is defined then it is * taken to be the fully-qualified name of a concrete provider class. * The class is loaded and instantiated; if this process fails then an * unspecified unchecked error or exception is thrown. </p></li> * * <li><p> If a provider class has been installed in a jar file that is * visible to the system class loader, and that jar file contains a * provider-configuration file named * <tt>com.sun.net.httpserver.HttpServerProvider</tt> in the resource * directory <tt>META-INF/services</tt>, then the first class name * specified in that file is taken. The class is loaded and * instantiated; if this process fails then an unspecified unchecked error or exception is * thrown. </p></li> * * <li><p> Finally, if no provider has been specified by any of the above * means then the system-default provider class is instantiated and the * result is returned. </p></li> * * </ol> * * <p> Subsequent invocations of this method return the provider that was * returned by the first invocation. </p> * * @return The system-wide default HttpServerProvider */ public static HttpServerProvider provider () { synchronized (lock) { if (provider != null) return provider; return (HttpServerProvider)AccessController .doPrivileged(new PrivilegedAction<Object>() { public Object run() { if (loadProviderFromProperty()) return provider; if (loadProviderAsService()) return provider; provider = new sun.net.httpserver.DefaultHttpServerProvider(); return provider; } }); } }}
/*
* Copyright (c) 2005, 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.net.httpserver.spi;
import java.io.FileDescriptor;
import java.io.IOException;
import java.net.*;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Iterator;
import sun.misc.Service;
import sun.misc.ServiceConfigurationError;
import sun.security.action.GetPropertyAction;
import com.sun.net.httpserver.*;
/**
* Service provider class for HttpServer.
* Sub-classes of HttpServerProvider provide an implementation of {@link HttpServer} and
* associated classes. Applications do not normally use this class.
* See {@link #provider()} for how providers are found and loaded.
*/
public abstract class HttpServerProvider {
/**
* creates a HttpServer from this provider
* @param addr the address to bind to. May be <code>null</code>
* @param backlog the socket backlog. A value of <code>zero</code> means the systems default
*/
public abstract HttpServer createHttpServer (InetSocketAddress addr, int backlog) throws IOException;
/**
* creates a HttpsServer from this provider
* @param addr the address to bind to. May be <code>null</code>
* @param backlog the socket backlog. A value of <code>zero</code> means the systems default
*/
public abstract HttpsServer createHttpsServer (InetSocketAddress addr, int backlog) throws IOException;
private static final Object lock = new Object();
private static HttpServerProvider provider = null;
/**
* Initializes a new instance of this class. </p>
*
* @throws SecurityException
* If a security manager has been installed and it denies
* {@link RuntimePermission}<tt>("httpServerProvider")</tt>
*/
protected HttpServerProvider() {
SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkPermission(new RuntimePermission("httpServerProvider"));
}
private static boolean loadProviderFromProperty() {
String cn = System.getProperty("com.sun.net.httpserver.HttpServerProvider");
if (cn == null)
return false;
try {
Class c = Class.forName(cn, true,
ClassLoader.getSystemClassLoader());
provider = (HttpServerProvider)c.newInstance();
return true;
} catch (ClassNotFoundException x) {
throw new ServiceConfigurationError(x);
} catch (IllegalAccessException x) {
throw new ServiceConfigurationError(x);
} catch (InstantiationException x) {
throw new ServiceConfigurationError(x);
} catch (SecurityException x) {
throw new ServiceConfigurationError(x);
}
}
private static boolean loadProviderAsService() {
Iterator i = Service.providers(HttpServerProvider.class,
ClassLoader.getSystemClassLoader());
for (;;) {
try {
if (!i.hasNext())
return false;
provider = (HttpServerProvider)i.next();
return true;
} catch (ServiceConfigurationError sce) {
if (sce.getCause() instanceof SecurityException) {
// Ignore the security exception, try the next provider
continue;
}
throw sce;
}
}
}
/**
* Returns the system wide default HttpServerProvider for this invocation of
* the Java virtual machine.
*
* <p> The first invocation of this method locates the default provider
* object as follows: </p>
*
* <ol>
*
* <li><p> If the system property
* <tt>com.sun.net.httpserver.HttpServerProvider</tt> is defined then it is
* taken to be the fully-qualified name of a concrete provider class.
* The class is loaded and instantiated; if this process fails then an
* unspecified unchecked error or exception is thrown. </p></li>
*
* <li><p> If a provider class has been installed in a jar file that is
* visible to the system class loader, and that jar file contains a
* provider-configuration file named
* <tt>com.sun.net.httpserver.HttpServerProvider</tt> in the resource
* directory <tt>META-INF/services</tt>, then the first class name
* specified in that file is taken. The class is loaded and
* instantiated; if this process fails then an unspecified unchecked error or exception is
* thrown. </p></li>
*
* <li><p> Finally, if no provider has been specified by any of the above
* means then the system-default provider class is instantiated and the
* result is returned. </p></li>
*
* </ol>
*
* <p> Subsequent invocations of this method return the provider that was
* returned by the first invocation. </p>
*
* @return The system-wide default HttpServerProvider
*/
public static HttpServerProvider provider () {
synchronized (lock) {
if (provider != null)
return provider;
return (HttpServerProvider)AccessController
.doPrivileged(new PrivilegedAction<Object>() {
public Object run() {
if (loadProviderFromProperty())
return provider;
if (loadProviderAsService())
return provider;
provider = new sun.net.httpserver.DefaultHttpServerProvider();
return provider;
}
});
}
}
}