forked from jetty/jetty.project
-
Notifications
You must be signed in to change notification settings - Fork 0
/
DeflateFrameExtension.java
77 lines (68 loc) · 2.29 KB
/
DeflateFrameExtension.java
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
//
// ========================================================================
// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.common.extensions.compress;
import java.util.zip.DataFormatException;
import org.eclipse.jetty.websocket.api.BadPayloadException;
import org.eclipse.jetty.websocket.api.extensions.Frame;
/**
* Implementation of the
* <a href="https://tools.ietf.org/id/draft-tyoshino-hybi-websocket-perframe-deflate.txt">deflate-frame</a>
* extension seen out in the wild.
*/
public class DeflateFrameExtension extends CompressExtension
{
@Override
public String getName()
{
return "deflate-frame";
}
@Override
int getRsvUseMode()
{
return RSV_USE_ALWAYS;
}
@Override
int getTailDropMode()
{
return TAIL_DROP_ALWAYS;
}
@Override
public void incomingFrame(Frame frame)
{
// Incoming frames are always non concurrent because
// they are read and parsed with a single thread, and
// therefore there is no need for synchronization.
if (frame.getType().isControl() || !frame.isRsv1() || !frame.hasPayload())
{
nextIncomingFrame(frame);
return;
}
try
{
ByteAccumulator accumulator = this.accumulator.get();
decompress(accumulator, frame.getPayload());
decompress(accumulator, TAIL_BYTES_BUF.slice());
forwardIncoming(frame, accumulator);
accumulator.recycle();
}
catch (DataFormatException e)
{
throw new BadPayloadException(e);
}
}
}