1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.web.jcr.webdav;
25
26 import java.util.regex.Matcher;
27 import java.util.regex.Pattern;
28 import javax.servlet.ServletContext;
29 import javax.servlet.http.HttpServletRequest;
30
31 /**
32 * A {@link RequestResolver} implementation that expects the first segment of the URI is the repository name, the second is the
33 * workspace name, and the remaining form the node path. This resolver does handle the case when only the repository name is
34 * specified, or only the repository and workspace names are supplied, or when not even the repository name is given.
35 *
36 * @see SingleRepositoryRequestResolver
37 */
38 public class MultiRepositoryRequestResolver implements RequestResolver {
39
40 /**
41 * The string representation of the Java version of the {@link #PATH_PATTERN} regular expression.
42 */
43 protected static final String PATH_PATTERN_STRING = "/?(([^/]*)(/([^/]*)?(/(.*))?)?)?";
44
45 /**
46 * The regular expression that is used to extract the repository name, workspace name, and node path. Group 2 will contain the
47 * repository name, group 4 the workspace name, group 5 the node path (with leading slash). Any of these groups may be empty
48 * (or null).
49 * <p>
50 * The regular expression is <code>/?(([^/]*)(/([^/]*)?(/(.*))?)?)?</code>.
51 */
52 protected static final Pattern PATH_PATTERN = Pattern.compile(PATH_PATTERN_STRING);
53
54 protected static final int REPOSITORY_NAME_GROUP = 2;
55 protected static final int WORKSPACE_WITH_SLASH_GROUP = 3;
56 protected static final int WORKSPACE_NAME_GROUP = 4;
57 protected static final int PATH_GROUP = 5;
58
59 protected static final String ROOT_NODE_PATH = "/";
60
61 @Override
62 public void initialize( ServletContext context ) {
63 // nothing to do
64 }
65
66 @Override
67 public ResolvedRequest resolve( HttpServletRequest request,
68 String relativePath ) {
69 if (relativePath != null && relativePath.length() != 0) {
70 Matcher matcher = PATH_PATTERN.matcher(relativePath);
71 if (matcher.matches()) {
72 String repositoryName = matcher.group(REPOSITORY_NAME_GROUP); // may be null
73 String workspaceName = matcher.group(WORKSPACE_NAME_GROUP); // may be null
74 String nodePath = matcher.group(PATH_GROUP); // may be null
75 if (nodePath == null) {
76 if (workspaceName != null) {
77 if (workspaceName.length() == 0 && "/".equals(matcher.group(WORKSPACE_WITH_SLASH_GROUP))) {
78 // There really isn't a workspace
79 workspaceName = null;
80 } else {
81 // There's a real workspace, so set the path to the root node ...
82 nodePath = ROOT_NODE_PATH;
83 }
84 } else if (repositoryName != null && repositoryName.length() == 0) {
85 // There's no path or workspace, and the repository name is blank ...
86 repositoryName = null;
87 }
88 } else {
89 // There is a path, so make sure that the repository and workspace names exist ...
90 if (repositoryName == null) repositoryName = "";
91 else if (workspaceName == null) workspaceName = "";
92 }
93 return new ResolvedRequest(request, repositoryName, workspaceName, nodePath);
94 }
95 }
96 return new ResolvedRequest(request, null, null, null);
97 }
98 }