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1 /*
2  * Copyright (C) 2008 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 COMPUTER, INC. ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  *
25  */
26 
27 #ifndef CrossOriginPreflightResultCache_h
28 #define CrossOriginPreflightResultCache_h
29 
30 #include "KURLHash.h"
31 #include <wtf/HashMap.h>
32 #include <wtf/HashSet.h>
33 #include <wtf/PassOwnPtr.h>
34 #include <wtf/text/StringHash.h>
35 
36 namespace WebCore {
37 
38     class HTTPHeaderMap;
39     class ResourceResponse;
40 
41     class CrossOriginPreflightResultCacheItem {
42         WTF_MAKE_NONCOPYABLE(CrossOriginPreflightResultCacheItem); WTF_MAKE_FAST_ALLOCATED;
43     public:
CrossOriginPreflightResultCacheItem(bool credentials)44         CrossOriginPreflightResultCacheItem(bool credentials)
45             : m_absoluteExpiryTime(0)
46             , m_credentials(credentials)
47         {
48         }
49 
50         bool parse(const ResourceResponse&, String& errorDescription);
51         bool allowsCrossOriginMethod(const String&, String& errorDescription) const;
52         bool allowsCrossOriginHeaders(const HTTPHeaderMap&, String& errorDescription) const;
53         bool allowsRequest(bool includeCredentials, const String& method, const HTTPHeaderMap& requestHeaders) const;
54 
55     private:
56         typedef HashSet<String, CaseFoldingHash> HeadersSet;
57 
58         // FIXME: A better solution to holding onto the absolute expiration time might be
59         // to start a timer for the expiration delta that removes this from the cache when
60         // it fires.
61         double m_absoluteExpiryTime;
62         bool m_credentials;
63         HashSet<String> m_methods;
64         HeadersSet m_headers;
65     };
66 
67     class CrossOriginPreflightResultCache {
68         WTF_MAKE_NONCOPYABLE(CrossOriginPreflightResultCache); WTF_MAKE_FAST_ALLOCATED;
69     public:
70         static CrossOriginPreflightResultCache& shared();
71 
72         void appendEntry(const String& origin, const KURL&, PassOwnPtr<CrossOriginPreflightResultCacheItem>);
73         bool canSkipPreflight(const String& origin, const KURL&, bool includeCredentials, const String& method, const HTTPHeaderMap& requestHeaders);
74 
75         void empty();
76 
77     private:
CrossOriginPreflightResultCache()78         CrossOriginPreflightResultCache() { }
79 
80         typedef HashMap<std::pair<String, KURL>, CrossOriginPreflightResultCacheItem*> CrossOriginPreflightResultHashMap;
81 
82         CrossOriginPreflightResultHashMap m_preflightHashMap;
83     };
84 
85 } // namespace WebCore
86 
87 #endif
88