1/*
2 * Copyright (C) 2019 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <WebCore/ResourceResponse.h>
29#include <WebCore/SharedBuffer.h>
30#include <WebCore/Timer.h>
31#include <wtf/Deque.h>
32#include <wtf/HashMap.h>
33#include <wtf/URLHash.h>
34#include <wtf/text/WTFString.h>
35
36namespace WebKit {
37
38class PrefetchCache {
39 WTF_MAKE_NONCOPYABLE(PrefetchCache);
40 WTF_MAKE_FAST_ALLOCATED;
41public:
42 PrefetchCache();
43 ~PrefetchCache();
44
45 void clear();
46
47 struct Entry {
48 Entry(WebCore::ResourceResponse&&, RefPtr<WebCore::SharedBuffer>&&);
49
50 Ref<WebCore::SharedBuffer> releaseBuffer() { return buffer.releaseNonNull(); }
51
52 WebCore::ResourceResponse response;
53 RefPtr<WebCore::SharedBuffer> buffer;
54 };
55
56 std::unique_ptr<Entry> take(const URL&);
57 void store(const URL&, WebCore::ResourceResponse&&, RefPtr<WebCore::SharedBuffer>&&);
58
59private:
60 void clearExpiredEntries();
61
62 using PrefetchEntriesMap = HashMap<URL, std::unique_ptr<Entry>>;
63 std::unique_ptr<PrefetchEntriesMap> m_sessionPrefetches;
64
65 using SessionPrefetchExpirationList = Deque<std::tuple<URL, WallTime>>;
66 SessionPrefetchExpirationList m_sessionExpirationList;
67
68 WebCore::Timer m_expirationTimer;
69};
70
71} // namespace WebKit
72