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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 #include "KURLHash.h"
     28 #include "StringHash.h"
     29 #include <wtf/HashMap.h>
     30 #include <wtf/HashSet.h>
     31 
     32 namespace WebCore {
     33 
     34     class HTTPHeaderMap;
     35     class ResourceResponse;
     36 
     37     class CrossOriginPreflightResultCacheItem : public Noncopyable {
     38     public:
     39         CrossOriginPreflightResultCacheItem(bool credentials)
     40             : m_absoluteExpiryTime(0)
     41             , m_credentials(credentials)
     42         {
     43         }
     44 
     45         bool parse(const ResourceResponse&);
     46         bool allowsCrossOriginMethod(const String&) const;
     47         bool allowsCrossOriginHeaders(const HTTPHeaderMap&) const;
     48         bool allowsRequest(bool includeCredentials, const String& method, const HTTPHeaderMap& requestHeaders) const;
     49 
     50     private:
     51         typedef HashSet<String, CaseFoldingHash> HeadersSet;
     52 
     53         // FIXME: A better solution to holding onto the absolute expiration time might be
     54         // to start a timer for the expiration delta that removes this from the cache when
     55         // it fires.
     56         double m_absoluteExpiryTime;
     57         bool m_credentials;
     58         HashSet<String> m_methods;
     59         HeadersSet m_headers;
     60     };
     61 
     62     class CrossOriginPreflightResultCache : public Noncopyable {
     63     public:
     64         static CrossOriginPreflightResultCache& shared();
     65 
     66         void appendEntry(const String& origin, const KURL&, CrossOriginPreflightResultCacheItem*);
     67         bool canSkipPreflight(const String& origin, const KURL&, bool includeCredentials, const String& method, const HTTPHeaderMap& requestHeaders);
     68 
     69         void empty();
     70 
     71     private:
     72         CrossOriginPreflightResultCache() { }
     73 
     74         typedef HashMap<std::pair<String, KURL>, CrossOriginPreflightResultCacheItem*> CrossOriginPreflightResultHashMap;
     75 
     76         CrossOriginPreflightResultHashMap m_preflightHashMap;
     77     };
     78 
     79 } // namespace WebCore
     80