1/*
2 * Copyright (C) 2012 Google Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef WebSocketExtensionProcessor_h
32#define WebSocketExtensionProcessor_h
33
34#include "wtf/HashMap.h"
35#include "wtf/text/WTFString.h"
36
37namespace WebCore {
38
39class WebSocketExtensionProcessor {
40public:
41    virtual ~WebSocketExtensionProcessor() { }
42
43    String extensionToken() const { return m_extensionToken; }
44
45    // The return value of this method will be a part of the value of
46    // Sec-WebSocket-Extensions.
47    virtual String handshakeString() = 0;
48
49    // This should validate the server's response parameters which are passed
50    // as HashMap<key, value>. This may also do something for the extension.
51    // Note that this method may be called more than once when the server
52    // response contains duplicate extension token that matches extensionToken().
53    virtual bool processResponse(const HashMap<String, String>&) = 0;
54
55    // If procecssResponse() returns false, this should provide the reason.
56    virtual String failureReason() { return "Extension " + m_extensionToken + " failed"; }
57
58protected:
59    explicit WebSocketExtensionProcessor(const String& extensionToken)
60        : m_extensionToken(extensionToken)
61    {
62    }
63
64private:
65    String m_extensionToken;
66};
67
68}
69
70#endif // WebSocketExtensionProcessor_h
71