1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*******************************************************************************
* Copyright (c) 2004, 2006 IBM Corporation and others.
* 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.osgi.framework.internal.protocol;
import java.lang.reflect.Method;
import java.net.*;
import java.util.*;
import org.eclipse.osgi.framework.adaptor.FrameworkAdaptor;
import org.eclipse.osgi.framework.internal.core.Constants;
import org.eclipse.osgi.framework.log.FrameworkLogEntry;
import org.eclipse.osgi.framework.util.SecureAction;
import org.osgi.framework.BundleContext;
import org.osgi.service.url.URLConstants;
import org.osgi.util.tracker.ServiceTracker;
/**
* This class contains the URL stream handler factory for the OSGi framework.
*/
public class StreamHandlerFactory extends MultiplexingFactory implements URLStreamHandlerFactory {
static final SecureAction secureAction = new SecureAction();
private ServiceTracker handlerTracker;
protected static final String URLSTREAMHANDLERCLASS = "org.osgi.service.url.URLStreamHandlerService"; //$NON-NLS-1$
protected static final String PROTOCOL_HANDLER_PKGS = "java.protocol.handler.pkgs"; //$NON-NLS-1$
protected static final String INTERNAL_PROTOCOL_HANDLER_PKG = "org.eclipse.osgi.framework.internal.protocol"; //$NON-NLS-1$
private static final List ignoredClasses = Arrays.asList(new Class[] {MultiplexingURLStreamHandler.class, StreamHandlerFactory.class, URL.class});
private Hashtable proxies;
private URLStreamHandlerFactory parentFactory;
/**
* Create the factory.
*
* @param context BundleContext for the system bundle
*/
public StreamHandlerFactory(BundleContext context, FrameworkAdaptor adaptor) {
super(context, adaptor);
proxies = new Hashtable(15);
handlerTracker = new ServiceTracker(context, URLSTREAMHANDLERCLASS, null);
handlerTracker.open();
}
private Class getBuiltIn(String protocol, String builtInHandlers) {
if (builtInHandlers == null)
return null;
Class clazz;
StringTokenizer tok = new StringTokenizer(builtInHandlers, "|"); //$NON-NLS-1$
while (tok.hasMoreElements()) {
StringBuffer name = new StringBuffer();
name.append(tok.nextToken());
name.append("."); //$NON-NLS-1$
name.append(protocol);
name.append(".Handler"); //$NON-NLS-1$
try {
clazz = secureAction.forName(name.toString());
if (clazz != null)
return clazz; //this class exists, it is a built in handler
} catch (ClassNotFoundException ex) {
// keep looking
}
}
return null;
}
/**
* Creates a new URLStreamHandler instance for the specified
* protocol.
*
* @param protocol The desired protocol
* @return a URLStreamHandler for the specific protocol.
*/
public URLStreamHandler createURLStreamHandler(String protocol) {
//first check for built in handlers
String builtInHandlers = secureAction.getProperty(PROTOCOL_HANDLER_PKGS);
Class clazz = getBuiltIn(protocol, builtInHandlers);
if (clazz != null)
return null; // let the VM handle it
URLStreamHandler result = null;
if (isMultiplexing()) {
if (findAuthorizedURLStreamHandler(protocol) != null)
result = new MultiplexingURLStreamHandler(protocol, this);
} else {
result = createInternalURLStreamHandler(protocol);
}
// if parent is present do parent lookup
if (result == null && parentFactory != null)
result = parentFactory.createURLStreamHandler(protocol);
return result; //result may be null; let the VM handle it (consider sun.net.protocol.www.*)
}
public URLStreamHandler createInternalURLStreamHandler(String protocol) {
//internal protocol handlers
String internalHandlerPkgs = secureAction.getProperty(Constants.INTERNAL_HANDLER_PKGS);
internalHandlerPkgs = internalHandlerPkgs == null ? INTERNAL_PROTOCOL_HANDLER_PKG : internalHandlerPkgs + '|' + INTERNAL_PROTOCOL_HANDLER_PKG;
Class clazz = getBuiltIn(protocol, internalHandlerPkgs);
if (clazz == null) {
//Now we check the service registry
//first check to see if the handler is in the cache
URLStreamHandlerProxy handler = (URLStreamHandlerProxy) proxies.get(protocol);
if (handler != null)
return (handler);
//look through the service registry for a URLStramHandler registered for this protocol
org.osgi.framework.ServiceReference[] serviceReferences = handlerTracker.getServiceReferences();
if (serviceReferences == null)
return null;
for (int i = 0; i < serviceReferences.length; i++) {
Object prop = serviceReferences[i].getProperty(URLConstants.URL_HANDLER_PROTOCOL);
if (!(prop instanceof String[]))
continue;
String[] protocols = (String[]) prop;
for (int j = 0; j < protocols.length; j++)
if (protocols[j].equals(protocol)) {
handler = new URLStreamHandlerProxy(protocol, serviceReferences[i], context);
proxies.put(protocol, handler);
return (handler);
}
}
return null;
}
// must be a built-in handler
try {
URLStreamHandler handler = (URLStreamHandler) clazz.newInstance();
if (handler instanceof ProtocolActivator) {
((ProtocolActivator) handler).start(context, adaptor);
}
return handler;
} catch (Exception e) {
return null;
}
}
protected URLStreamHandler findAuthorizedURLStreamHandler(String protocol) {
Object factory = findAuthorizedFactory(ignoredClasses);
if (factory == null)
return null;
if (factory == this)
return createInternalURLStreamHandler(protocol);
try {
Method createInternalURLStreamHandlerMethod = factory.getClass().getMethod("createInternalURLStreamHandler", new Class[] {String.class}); //$NON-NLS-1$
return (URLStreamHandler) createInternalURLStreamHandlerMethod.invoke(factory, new Object[] {protocol});
} catch (Exception e) {
adaptor.getFrameworkLog().log(new FrameworkLogEntry(StreamHandlerFactory.class.getName(), "findAuthorizedURLStreamHandler-loop", FrameworkLogEntry.ERROR, e, null)); //$NON-NLS-1$
throw new RuntimeException(e.getMessage());
}
}
public Object getParentFactory() {
return parentFactory;
}
public void setParentFactory(Object parentFactory) {
if (this.parentFactory == null) // only allow it to be set once
this.parentFactory = (URLStreamHandlerFactory) parentFactory;
}
}
|
