1/*
2 * Copyright (C) 2013 Apple 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
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#ifndef ContentFilter_h
27#define ContentFilter_h
28
29#if USE(CONTENT_FILTERING)
30
31#include <wtf/PassRefPtr.h>
32#include <wtf/RetainPtr.h>
33
34#if PLATFORM(IOS)
35#include <functional>
36#endif
37
38#if PLATFORM(COCOA)
39OBJC_CLASS NSData;
40OBJC_CLASS NSKeyedArchiver;
41OBJC_CLASS NSKeyedUnarchiver;
42OBJC_CLASS WebFilterEvaluator;
43#endif
44
45#define HAVE_NE_FILTER_SOURCE TARGET_OS_EMBEDDED || (!TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 10100)
46
47#if HAVE(NE_FILTER_SOURCE)
48#import <dispatch/dispatch.h>
49OBJC_CLASS NEFilterSource;
50OBJC_CLASS NSMutableData;
51#endif
52
53namespace WebCore {
54
55class ResourceRequest;
56class ResourceResponse;
57
58class ContentFilter {
59public:
60    static bool canHandleResponse(const ResourceResponse&);
61
62    explicit ContentFilter(const ResourceResponse&);
63    ~ContentFilter();
64
65    void addData(const char* data, int length);
66    void finishedAddingData();
67    bool needsMoreData() const;
68    bool didBlockData() const;
69    const char* getReplacementData(int& length) const;
70
71#if PLATFORM(COCOA)
72    ContentFilter();
73    void encode(NSKeyedArchiver *) const;
74    static bool decode(NSKeyedUnarchiver *, ContentFilter&);
75#endif
76
77#if PLATFORM(IOS)
78    bool handleUnblockRequestAndDispatchIfSuccessful(const ResourceRequest&, std::function<void()>);
79#endif
80
81private:
82#if PLATFORM(COCOA)
83    RetainPtr<WebFilterEvaluator> m_platformContentFilter;
84    RetainPtr<NSData> m_replacementData;
85#endif
86
87#if HAVE(NE_FILTER_SOURCE)
88    long m_neFilterSourceStatus;
89    RetainPtr<NEFilterSource> m_neFilterSource;
90    dispatch_queue_t m_neFilterSourceQueue;
91    RetainPtr<NSMutableData> m_originalData;
92#endif
93};
94
95} // namespace WebCore
96
97#endif // USE(CONTENT_FILTERING)
98
99#endif // ContentFilter_h
100