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
|
/*
* 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.tomcat.util.descriptor;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Map;
import org.apache.tomcat.util.res.StringManager;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.ext.EntityResolver2;
/**
* A resolver for locally cached XML resources.
*/
public class LocalResolver implements EntityResolver2 {
private static final StringManager sm =
StringManager.getManager(Constants.PACKAGE_NAME);
private static final String[] JAVA_EE_NAMESPACES = {
XmlIdentifiers.JAVAEE_1_4_NS,
XmlIdentifiers.JAVAEE_5_NS };
private final Map<String,String> publicIds;
private final Map<String,String> systemIds;
private final boolean blockExternal;
/**
* Constructor providing mappings of public and system identifiers to local
* resources. Each map contains a mapping from a well-known identifier to a
* URL for a local resource path.
*
* @param publicIds mapping of well-known public identifiers to local
* resources
* @param systemIds mapping of well-known system identifiers to local
* resources
* @param blockExternal are external resources blocked that are not
* well-known
*/
public LocalResolver(Map<String,String> publicIds,
Map<String,String> systemIds, boolean blockExternal) {
this.publicIds = publicIds;
this.systemIds = systemIds;
this.blockExternal = blockExternal;
}
@Override
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException {
return resolveEntity(null, publicId, null, systemId);
}
@Override
public InputSource resolveEntity(String name, String publicId,
String base, String systemId) throws SAXException, IOException {
// First try resolving using the publicId
String resolved = publicIds.get(publicId);
if (resolved != null) {
InputSource is = new InputSource(resolved);
is.setPublicId(publicId);
return is;
}
// If there is no systemId, can't try anything else
if (systemId == null) {
throw new FileNotFoundException(sm.getString("localResolver.unresolvedEntity",
name, publicId, systemId, base));
}
// Try resolving with the supplied systemId
resolved = systemIds.get(systemId);
if (resolved != null) {
InputSource is = new InputSource(resolved);
is.setPublicId(publicId);
return is;
}
// Work-around for XML documents that use just the file name for the
// location to refer to a JavaEE schema
for (String javaEENamespace : JAVA_EE_NAMESPACES) {
String javaEESystemId = javaEENamespace + '/' + systemId;
resolved = systemIds.get(javaEESystemId);
if (resolved != null) {
InputSource is = new InputSource(resolved);
is.setPublicId(publicId);
return is;
}
}
// Resolve the supplied systemId against the base
URI systemUri;
try {
if (base == null) {
systemUri = new URI(systemId);
} else {
// Can't use URI.resolve() because "jar:..." URLs are not valid
// hierarchical URIs so resolve() does not work. new URL()
// delegates to the jar: stream handler and it manages to figure
// it out.
URI baseUri = new URI(base);
systemUri = new URL(baseUri.toURL(), systemId).toURI();
}
systemUri = systemUri.normalize();
} catch (URISyntaxException e) {
// May be caused by a | being used instead of a : in an absolute
// file URI on Windows.
if (blockExternal) {
// Absolute paths aren't allowed so block it
throw new MalformedURLException(e.getMessage());
} else {
// See if the URLHandler can resolve it
return new InputSource(systemId);
}
}
if (systemUri.isAbsolute()) {
// Try the resolved systemId
resolved = systemIds.get(systemUri.toString());
if (resolved != null) {
InputSource is = new InputSource(resolved);
is.setPublicId(publicId);
return is;
}
if (!blockExternal) {
InputSource is = new InputSource(systemUri.toString());
is.setPublicId(publicId);
return is;
}
}
throw new FileNotFoundException(sm.getString("localResolver.unresolvedEntity",
name, publicId, systemId, base));
}
@Override
public InputSource getExternalSubset(String name, String baseURI)
throws SAXException, IOException {
return null;
}
}
|
