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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 blink {
     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     FetchRequest::DeferOption defer() const { return m_defer; }
     50     void setDefer(FetchRequest::DeferOption defer) { m_defer = defer; }
     51     void setCharset(const String& charset) { m_charset = charset.isolatedCopy(); }
     52     void setCrossOriginEnabled(StoredCredentials allowCredentials)
     53     {
     54         m_isCORSEnabled = true;
     55         m_allowCredentials = allowCredentials;
     56     }
     57 
     58     Resource::Type resourceType() const { return m_resourceType; }
     59 
     60 private:
     61     PreloadRequest(const String& initiatorName, const TextPosition& initiatorPosition, const String& resourceURL, const KURL& baseURL, Resource::Type resourceType)
     62         : m_initiatorName(initiatorName)
     63         , m_initiatorPosition(initiatorPosition)
     64         , m_resourceURL(resourceURL.isolatedCopy())
     65         , m_baseURL(baseURL.copy())
     66         , m_resourceType(resourceType)
     67         , m_isCORSEnabled(false)
     68         , m_allowCredentials(DoNotAllowStoredCredentials)
     69         , m_discoveryTime(monotonicallyIncreasingTime())
     70         , m_defer(FetchRequest::NoDefer)
     71     {
     72     }
     73 
     74     KURL completeURL(Document*);
     75 
     76     String m_initiatorName;
     77     TextPosition m_initiatorPosition;
     78     String m_resourceURL;
     79     KURL m_baseURL;
     80     String m_charset;
     81     Resource::Type m_resourceType;
     82     bool m_isCORSEnabled;
     83     StoredCredentials m_allowCredentials;
     84     double m_discoveryTime;
     85     FetchRequest::DeferOption m_defer;
     86 };
     87 
     88 typedef Vector<OwnPtr<PreloadRequest> > PreloadRequestStream;
     89 
     90 class HTMLResourcePreloader FINAL : public NoBaseWillBeGarbageCollected<HTMLResourcePreloader> {
     91     WTF_MAKE_NONCOPYABLE(HTMLResourcePreloader); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
     92 public:
     93     static PassOwnPtrWillBeRawPtr<HTMLResourcePreloader> create(Document&);
     94     void trace(Visitor*);
     95 
     96     void takeAndPreload(PreloadRequestStream&);
     97     void preload(PassOwnPtr<PreloadRequest>);
     98 
     99 private:
    100     explicit HTMLResourcePreloader(Document&);
    101 
    102     RawPtrWillBeMember<Document> m_document;
    103 };
    104 
    105 }
    106 
    107 #endif
    108