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      1 /*
      2  * Copyright (C) 2013 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
      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. ``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 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 #ifndef HTMLResourcePreloader_h
     27 #define HTMLResourcePreloader_h
     28 
     29 #include "core/fetch/FetchRequest.h"
     30 #include "core/fetch/Resource.h"
     31 #include "wtf/CurrentTime.h"
     32 #include "wtf/text/TextPosition.h"
     33 
     34 namespace WebCore {
     35 
     36 class PreloadRequest {
     37 public:
     38     static PassOwnPtr<PreloadRequest> create(const String& initiatorName, const TextPosition& initiatorPosition, const String& resourceURL, const KURL& baseURL, Resource::Type resourceType)
     39     {
     40         return adoptPtr(new PreloadRequest(initiatorName, initiatorPosition, resourceURL, baseURL, resourceType));
     41     }
     42 
     43     bool isSafeToSendToAnotherThread() const;
     44 
     45     FetchRequest resourceRequest(Document*);
     46 
     47     const String& charset() const { return m_charset; }
     48     double discoveryTime() const { return m_discoveryTime; }
     49     void setCharset(const String& charset) { m_charset = charset.isolatedCopy(); }
     50     void setCrossOriginEnabled(StoredCredentials allowCredentials)
     51     {
     52         m_isCORSEnabled = true;
     53         m_allowCredentials = allowCredentials;
     54     }
     55 
     56     Resource::Type resourceType() const { return m_resourceType; }
     57 
     58 private:
     59     PreloadRequest(const String& initiatorName, const TextPosition& initiatorPosition, const String& resourceURL, const KURL& baseURL, Resource::Type resourceType)
     60         : m_initiatorName(initiatorName)
     61         , m_initiatorPosition(initiatorPosition)
     62         , m_resourceURL(resourceURL.isolatedCopy())
     63         , m_baseURL(baseURL.copy())
     64         , m_resourceType(resourceType)
     65         , m_isCORSEnabled(false)
     66         , m_allowCredentials(DoNotAllowStoredCredentials)
     67         , m_discoveryTime(monotonicallyIncreasingTime())
     68     {
     69     }
     70 
     71     KURL completeURL(Document*);
     72 
     73     String m_initiatorName;
     74     TextPosition m_initiatorPosition;
     75     String m_resourceURL;
     76     KURL m_baseURL;
     77     String m_charset;
     78     Resource::Type m_resourceType;
     79     bool m_isCORSEnabled;
     80     StoredCredentials m_allowCredentials;
     81     double m_discoveryTime;
     82 };
     83 
     84 typedef Vector<OwnPtr<PreloadRequest> > PreloadRequestStream;
     85 
     86 class HTMLResourcePreloader {
     87     WTF_MAKE_NONCOPYABLE(HTMLResourcePreloader); WTF_MAKE_FAST_ALLOCATED;
     88 public:
     89     explicit HTMLResourcePreloader(Document* document)
     90         : m_document(document)
     91     {
     92     }
     93 
     94     void takeAndPreload(PreloadRequestStream&);
     95     void preload(PassOwnPtr<PreloadRequest>);
     96 
     97 private:
     98     Document* m_document;
     99 };
    100 
    101 }
    102 
    103 #endif
    104