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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.core.internal.url;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.StringTokenizer;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.te.tcf.filesystem.core.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.nls.Messages;
import org.osgi.service.url.AbstractURLStreamHandlerService;
/**
* The stream handler service used to parse tcf stream protocol.
*/
public class TcfURLStreamHandlerService extends AbstractURLStreamHandlerService {
// The pattern of a windows path.
private static final String WINPATH_PATTERN = "[A-Za-z]:.*"; //$NON-NLS-1$
private static final char[] WINPATH_FORBIDDEN_CHARS = {':', '*', '?', '"', '<', '>', '|' };
/*
* (non-Javadoc)
* @see org.osgi.service.url.AbstractURLStreamHandlerService#openConnection(java.net.URL)
*/
@Override
public URLConnection openConnection(URL u) throws IOException {
return new TcfURLConnection(u);
}
/**
* Parse the given spec to the specified URL object. The expected format is:
* <p>
*
* <pre>
* TCF_URL = tcf:/<strong>PEER_ID</strong>/(<strong>URL_PATH</strong>)?
* PEER_ID = (.^/)+
* URL_PATH = <strong>WIN_PATH</strong> | <strong>RELATIVE_PATH</strong>
* WIN_PATH = <strong>DISK_SEG</strong> / (<strong>RELATIVE_PATH</strong>)?
* DISK_SEG = [a-zA-Z]:
* RELATIVE_PATH = <strong>PATH_SEG</strong> | <strong>PATH_SEG</strong>/<strong>RELATIVE_PATH</strong>
* Unix/Linux PATH_SEG = (.^[/])+
* Windows PATH_SEG = (.^[\/:*?"<>|])+
* </pre>
*/
@Override
protected void parseURL(URL u, String spec, int start, int limit) {
if (u.getPath() != null) {
String path = u.getPath();
if (!path.endsWith("/")) { //$NON-NLS-1$
path += "/"; //$NON-NLS-1$
}
path += spec;
setURL(u, u.getProtocol(), u.getHost(), u.getPort(), u.getAuthority(), u.getUserInfo(), path, u.getQuery(), u.getRef());
}
else {
IllegalArgumentException errorFormat = new IllegalArgumentException(Messages.TcfURLStreamHandlerService_ErrorURLFormat);
int end = spec.indexOf("/", start); //$NON-NLS-1$
if (end == -1) throw errorFormat;
start = end + 1;
end = spec.indexOf("/", start); //$NON-NLS-1$
if (end == -1) throw errorFormat;
String peerId = spec.substring(start, end);
if (peerId.trim().length() == 0) throw errorFormat;
start = end + 1;
String path = spec.substring(start);
if (path.length() > 0) {
if (path.matches(WINPATH_PATTERN)) {
String pathext = path.substring(2); // Cut the path after ':'.
if (pathext.length() == 0) throw new IllegalArgumentException(Messages.TcfURLStreamHandlerService_OnlyDiskPartError);
pathext = pathext.substring(1); // Cut the path after the disk part.
checkWinPath(pathext);
}
else {
path = "/" + path; //$NON-NLS-1$
}
}
else {
path = "/"; //$NON-NLS-1$
}
final String path2decode = path;
final AtomicReference<String> pathRef = new AtomicReference<String>();
SafeRunner.run(new ISafeRunnable(){
@Override
public void handleException(Throwable exception) {
// Ignore on purpose
}
@Override
public void run() throws Exception {
pathRef.set(decodeURLPath(path2decode));
}});
path = pathRef.get();
setURL(u, TcfURLConnection.PROTOCOL_SCHEMA, peerId, -1, null, null, path, null, null);
}
}
/**
* Decode the path from URI compatible path to a
* file system path.
*
* @see FSTreeNode#getURLEncodedPath
* @param path The URL whose path is to be decoded.
* @return The file system path.
* @throws UnsupportedEncodingException
*/
String decodeURLPath(String path) throws UnsupportedEncodingException {
StringTokenizer st = new StringTokenizer(path, "/"); //$NON-NLS-1$
StringBuilder builder = new StringBuilder();
while(st.hasMoreTokens()) {
if(builder.length() > 0) {
builder.append("/"); //$NON-NLS-1$
}
String segment = st.nextToken();
builder.append(URLDecoder.decode(segment, "UTF-8")); //$NON-NLS-1$
}
String relative = builder.toString();
return path.startsWith("/") ? "/" + relative : relative; //$NON-NLS-1$//$NON-NLS-2$
}
/**
* Check the format of the specified windows path.
*
* @param path The relative path to a disk part.
*/
private void checkWinPath(String path) {
for (int i = 0; i < path.length(); i++) {
char c = path.charAt(i);
for(int j=0;j<WINPATH_FORBIDDEN_CHARS.length;j++) {
if(c==WINPATH_FORBIDDEN_CHARS[j]) {
throw new IllegalArgumentException(NLS.bind(Messages.TcfURLStreamHandlerService_IllegalCharacter, "'"+c+"'")); //$NON-NLS-1$//$NON-NLS-2$
}
}
}
}
/**
* Encode the path from a file system path to
* URI compatible path.
*
* @see FSTreeNode#getURLEncodedPath
* @param path The URL whose path is to be decoded.
* @return The file system path.
* @throws UnsupportedEncodingException
*/
String encodeURLPath(String path) throws UnsupportedEncodingException {
StringTokenizer st = new StringTokenizer(path, "/"); //$NON-NLS-1$
StringBuilder builder = new StringBuilder();
while(st.hasMoreTokens()) {
if(builder.length() > 0) {
builder.append("/"); //$NON-NLS-1$
String segment = st.nextToken();
builder.append(URLEncoder.encode(segment, "UTF-8")); //$NON-NLS-1$
}
else {
String segment = st.nextToken();
if(path.matches(WINPATH_PATTERN)) {
builder.append(segment);
}
else{
builder.append(URLEncoder.encode(segment, "UTF-8")); //$NON-NLS-1$
}
}
}
String relative = builder.toString();
return path.startsWith("/") ? "/" + relative : relative; //$NON-NLS-1$//$NON-NLS-2$
}
/*
* (non-Javadoc)
* @see org.osgi.service.url.AbstractURLStreamHandlerService#toExternalForm(java.net.URL)
*/
@Override
public String toExternalForm(final URL u) {
String peerId = u.getHost();
StringBuilder builder = new StringBuilder();
builder.append(TcfURLConnection.PROTOCOL_SCHEMA);
builder.append(":/"); //$NON-NLS-1$
builder.append(peerId);
final AtomicReference<String> pathRef = new AtomicReference<String>();
SafeRunner.run(new ISafeRunnable(){
@Override
public void handleException(Throwable exception) {
// Ignore
}
@Override
public void run() throws Exception {
pathRef.set(encodeURLPath(u.getPath()));
}});
String path = pathRef.get();
if(path == null) {
builder.append("/"); //$NON-NLS-1$
} else if(path.length() == 0) {
builder.append("/"); //$NON-NLS-1$
} else if(path.matches(WINPATH_PATTERN)) {
builder.append("/"); //$NON-NLS-1$
builder.append(path);
} else {
builder.append(path);
}
return builder.toString();
}
}
|
