third_party/WebKit/Source/core/loader/LinkLoader.h

   1 /*
   2  * Copyright (C) 2011 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 are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  */
  31
  32 #ifndef LinkLoader_h
  33 #define LinkLoader_h
  34
  35 #include "core/CoreExport.h"
  36 #include "core/fetch/ResourceClient.h"
  37 #include "core/fetch/ResourceOwner.h"
  38 #include "core/loader/LinkLoaderClient.h"
  39 #include "platform/PrerenderClient.h"
  40 #include "platform/Timer.h"
  41 #include "platform/heap/Handle.h"
  42 #include "wtf/OwnPtr.h"
  43
  44 namespace blink {
  45
  46 class Document;
  47 class LinkRelAttribute;
  48 class NetworkHintsInterface;
  49 class PrerenderHandle;
  50
  51 // The LinkLoader can load link rel types icon, dns-prefetch, subresource, prefetch and prerender.
  52 class CORE_EXPORT LinkLoader final : public ResourceOwner<Resource, ResourceClient>, public PrerenderClient {
  53     DISALLOW_ALLOCATION();
  54 public:
  55     explicit LinkLoader(LinkLoaderClient*);
  56     ~LinkLoader() override;
  57
  58     // from ResourceClient
  59     void notifyFinished(Resource*) override;
  60
  61     // from PrerenderClient
  62     void didStartPrerender() override;
  63     void didStopPrerender() override;
  64     void didSendLoadForPrerender() override;
  65     void didSendDOMContentLoadedForPrerender() override;
  66
  67     void released();
  68     bool loadLink(const LinkRelAttribute&, const AtomicString& crossOriginMode, const String& type, const String& as, const KURL&, Document&, const NetworkHintsInterface&);
  69     static bool loadLinkFromHeader(const String& headerValue, Document*, const NetworkHintsInterface&);
  70
  71     DECLARE_TRACE();
  72
  73 private:
  74     void linkLoadTimerFired(Timer<LinkLoader>*);
  75     void linkLoadingErrorTimerFired(Timer<LinkLoader>*);
  76     void preloadIfNeeded(const LinkRelAttribute&, const KURL& href, Document&, const String& as);
  77
  78     LinkLoaderClient* m_client;
  79
  80     Timer<LinkLoader> m_linkLoadTimer;
  81     Timer<LinkLoader> m_linkLoadingErrorTimer;
  82
  83     OwnPtrWillBeMember<PrerenderHandle> m_prerender;
  84 };
  85
  86 }
  87
  88 #endif