blob: 32813f5b68d9bb11e232588ed6299b3af20a76d0 (
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
|
//
// ========================================================================
// Copyright (c) 1995-2013 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.websocket;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/* ------------------------------------------------------------ */
/**
* Servlet to upgrade connections to WebSocket
* <p/>
* The request must have the correct upgrade headers, else it is
* handled as a normal servlet request.
* <p/>
* The initParameter "bufferSize" can be used to set the buffer size,
* which is also the max frame byte size (default 8192).
* <p/>
* The initParameter "maxIdleTime" can be used to set the time in ms
* that a websocket may be idle before closing.
* <p/>
* The initParameter "maxTextMessagesSize" can be used to set the size in characters
* that a websocket may be accept before closing.
* <p/>
* The initParameter "maxBinaryMessagesSize" can be used to set the size in bytes
* that a websocket may be accept before closing.
* <p/>
* The initParameter "minVersion" can be used to set the minimum protocol version
* accepted. Default is the RFC6455 version (13)
*/
@SuppressWarnings("serial")
public abstract class WebSocketServlet extends HttpServlet implements WebSocketFactory.Acceptor
{
private final Logger LOG = Log.getLogger(getClass());
private WebSocketFactory _webSocketFactory;
/* ------------------------------------------------------------ */
/**
* @see javax.servlet.GenericServlet#init()
*/
@Override
public void init() throws ServletException
{
try
{
String bs = getInitParameter("bufferSize");
_webSocketFactory = new WebSocketFactory(this, bs == null ? 8192 : Integer.parseInt(bs));
_webSocketFactory.start();
String max = getInitParameter("maxIdleTime");
if (max != null)
_webSocketFactory.setMaxIdleTime(Integer.parseInt(max));
max = getInitParameter("maxTextMessageSize");
if (max != null)
_webSocketFactory.setMaxTextMessageSize(Integer.parseInt(max));
max = getInitParameter("maxBinaryMessageSize");
if (max != null)
_webSocketFactory.setMaxBinaryMessageSize(Integer.parseInt(max));
String min = getInitParameter("minVersion");
if (min != null)
_webSocketFactory.setMinVersion(Integer.parseInt(min));
}
catch (ServletException x)
{
throw x;
}
catch (Exception x)
{
throw new ServletException(x);
}
}
/* ------------------------------------------------------------ */
/**
* @see javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
if (_webSocketFactory.acceptWebSocket(request, response) || response.isCommitted())
return;
super.service(request, response);
}
/* ------------------------------------------------------------ */
public boolean checkOrigin(HttpServletRequest request, String origin)
{
return true;
}
/* ------------------------------------------------------------ */
@Override
public void destroy()
{
try
{
_webSocketFactory.stop();
}
catch (Exception x)
{
LOG.ignore(x);
}
}
}
|
