blob: 912f4f8140ac27b9be0ebc08592fa5915b30e738 (
plain) (
blame)
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
|
//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.fcgi.parser;
import java.nio.ByteBuffer;
import org.eclipse.jetty.fcgi.FCGI;
/**
* <p>Parser for the BEGIN_REQUEST frame body.</p>
* <pre>
* struct begin_request_body {
* ushort role;
* ubyte flags;
* ubyte[5] reserved;
* }
* </pre>
*/
public class BeginRequestContentParser extends ContentParser
{
private final ServerParser.Listener listener;
private State state = State.ROLE;
private int cursor;
private int role;
private int flags;
public BeginRequestContentParser(HeaderParser headerParser, ServerParser.Listener listener)
{
super(headerParser);
this.listener = listener;
}
@Override
public Result parse(ByteBuffer buffer)
{
while (buffer.hasRemaining())
{
switch (state)
{
case ROLE:
{
if (buffer.remaining() >= 2)
{
role = buffer.getShort();
state = State.FLAGS;
}
else
{
state = State.ROLE_BYTES;
cursor = 0;
}
break;
}
case ROLE_BYTES:
{
int halfShort = buffer.get() & 0xFF;
role = (role << 8) + halfShort;
if (++cursor == 2)
state = State.FLAGS;
break;
}
case FLAGS:
{
flags = buffer.get() & 0xFF;
state = State.RESERVED;
break;
}
case RESERVED:
{
if (buffer.remaining() >= 5)
{
buffer.position(buffer.position() + 5);
onStart();
reset();
return Result.COMPLETE;
}
else
{
state = State.RESERVED_BYTES;
cursor = 0;
break;
}
}
case RESERVED_BYTES:
{
buffer.get();
if (++cursor == 5)
{
onStart();
reset();
return Result.COMPLETE;
}
break;
}
default:
{
throw new IllegalStateException();
}
}
}
return Result.PENDING;
}
private void onStart()
{
listener.onStart(getRequest(), FCGI.Role.from(role), flags);
}
private void reset()
{
state = State.ROLE;
cursor = 0;
role = 0;
flags = 0;
}
private enum State
{
ROLE, ROLE_BYTES, FLAGS, RESERVED, RESERVED_BYTES
}
}
|
