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
|
/*
* 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.websocket;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.CompletionHandler;
import javax.websocket.CloseReason;
import javax.websocket.CloseReason.CloseCodes;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.res.StringManager;
public class WsFrameClient extends WsFrameBase {
private final Log log = LogFactory.getLog(WsFrameClient.class);
private static final StringManager sm =
StringManager.getManager(Constants.PACKAGE_NAME);
private final AsyncChannelWrapper channel;
private final CompletionHandler<Integer,Void> handler;
// Not final as it may need to be re-sized
private ByteBuffer response;
public WsFrameClient(ByteBuffer response, AsyncChannelWrapper channel,
WsSession wsSession, Transformation transformation) {
super(wsSession, transformation);
this.response = response;
this.channel = channel;
this.handler = new WsFrameClientCompletionHandler();
}
void startInputProcessing() {
try {
processSocketRead();
} catch (IOException e) {
close(e);
}
}
private void processSocketRead() throws IOException {
while (response.hasRemaining()) {
int remaining = response.remaining();
int toCopy = Math.min(remaining, inputBuffer.length - writePos);
// Copy remaining bytes read in HTTP phase to input buffer used by
// frame processing
response.get(inputBuffer, writePos, toCopy);
writePos += toCopy;
// Process the data we have
processInputBuffer();
}
response.clear();
// Get some more data
if (isOpen()) {
channel.read(response, null, handler);
}
}
private final void close(Throwable t) {
CloseReason cr;
if (t instanceof WsIOException) {
cr = ((WsIOException) t).getCloseReason();
} else {
cr = new CloseReason(
CloseCodes.CLOSED_ABNORMALLY, t.getMessage());
}
try {
wsSession.close(cr);
} catch (IOException ignore) {
// Ignore
}
}
@Override
protected boolean isMasked() {
// Data is from the server so it is not masked
return false;
}
@Override
protected Log getLog() {
return log;
}
private class WsFrameClientCompletionHandler
implements CompletionHandler<Integer,Void> {
@Override
public void completed(Integer result, Void attachment) {
if (result.intValue() == -1) {
// BZ 57762. A dropped connection will get reported as EOF
// rather than as an error so handle it here.
if (isOpen()) {
// No close frame was received
close(new EOFException());
}
// No data to process
return;
}
response.flip();
try {
processSocketRead();
} catch (IOException e) {
// Only send a close message on an IOException if the client
// has not yet received a close control message from the server
// as the IOException may be in response to the client
// continuing to send a message after the server sent a close
// control message.
if (isOpen()) {
log.debug(sm.getString("wsFrameClient.ioe", e));
close(e);
}
}
}
@Override
public void failed(Throwable exc, Void attachment) {
if (exc instanceof ReadBufferOverflowException) {
// response will be empty if this exception is thrown
response = ByteBuffer.allocate(
((ReadBufferOverflowException) exc).getMinBufferSize());
response.flip();
try {
processSocketRead();
} catch (IOException e) {
close(e);
}
} else {
close(exc);
}
}
}
}
|
