| /******************************************************************************* |
| * Copyright (c) 2003, 2005 IBM Corporation. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.equinox.http; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.security.*; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * Utility class to execute common privileged code. |
| */ |
| public class SecureAction { |
| // make sure we use the correct controlContext; |
| private AccessControlContext controlContext; |
| |
| /** |
| * Constructs a new SecureAction object. The constructed SecureAction object |
| * uses the caller's AccessControlContext to perform security checks |
| */ |
| public SecureAction() { |
| // save the control context to be used. |
| this.controlContext = AccessController.getContext(); |
| } |
| |
| /** |
| * Gets a resource from a bundle. |
| * @param bundle the bundle to get the resource from |
| * @param name The name of the resource |
| * @return The URL of the resource |
| */ |
| |
| public URL getBundleResource(final Bundle bundle, final String name) { |
| if (System.getSecurityManager() == null) |
| return bundle.getResource(name); |
| return (URL) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return bundle.getResource(name); |
| } |
| }, controlContext); |
| } |
| |
| public URLConnection openURL(final URL url) throws IOException { |
| if (System.getSecurityManager() == null) |
| return open(url); |
| try { |
| return (URLConnection) AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() throws IOException { |
| return open(url); |
| } |
| }, controlContext); |
| } catch(PrivilegedActionException ex) { |
| throw (IOException) ex.getException(); |
| } |
| } |
| |
| URLConnection open(final URL url)throws IOException |
| { |
| URLConnection connection = url.openConnection(); |
| connection.connect(); /* establish connection to check permissions */ |
| return connection; |
| } |
| |
| /** |
| * Returns a system property. Same as calling |
| * System.getProperty(String,String). |
| * @param property the property key. |
| * @param def the default value if the property key does not exist. |
| * @return the value of the property or the def value if the property |
| * does not exist. |
| */ |
| public String getProperty(final String property, final String def) { |
| if (System.getSecurityManager() == null) |
| return System.getProperty(property, def); |
| return (String) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return System.getProperty(property, def); |
| } |
| }, controlContext); |
| } |
| |
| } |