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#include "config.h" 33#include "LinkLoader.h" 34 35#include "CSSStyleSheet.h" 36#include "CachedCSSStyleSheet.h" 37#include "CachedResourceLoader.h" 38#include "CachedResourceRequest.h" 39#include "ContainerNode.h" 40#include "DNS.h" 41#include "Document.h" 42#include "Frame.h" 43#include "FrameView.h" 44#include "LinkRelAttribute.h" 45#include "Settings.h" 46#include "StyleResolver.h" 47 48namespace WebCore { 49 50LinkLoader::LinkLoader(LinkLoaderClient* client) 51 : m_client(client) 52 , m_linkLoadTimer(this, &LinkLoader::linkLoadTimerFired) 53 , m_linkLoadingErrorTimer(this, &LinkLoader::linkLoadingErrorTimerFired) 54{ 55} 56 57LinkLoader::~LinkLoader() 58{ 59 if (m_cachedLinkResource) 60 m_cachedLinkResource->removeClient(this); 61} 62 63void LinkLoader::linkLoadTimerFired(Timer<LinkLoader>* timer) 64{ 65 ASSERT_UNUSED(timer, timer == &m_linkLoadTimer); 66 m_client->linkLoaded(); 67} 68 69void LinkLoader::linkLoadingErrorTimerFired(Timer<LinkLoader>* timer) 70{ 71 ASSERT_UNUSED(timer, timer == &m_linkLoadingErrorTimer); 72 m_client->linkLoadingErrored(); 73} 74 75void LinkLoader::notifyFinished(CachedResource* resource) 76{ 77 ASSERT_UNUSED(resource, m_cachedLinkResource.get() == resource); 78 79 if (m_cachedLinkResource->errorOccurred()) 80 m_linkLoadingErrorTimer.startOneShot(0); 81 else 82 m_linkLoadTimer.startOneShot(0); 83 84 m_cachedLinkResource->removeClient(this); 85 m_cachedLinkResource = 0; 86} 87 88bool LinkLoader::loadLink(const LinkRelAttribute& relAttribute, const String& type, 89 const String& sizes, const KURL& href, Document* document) 90{ 91 // We'll record this URL per document, even if we later only use it in top level frames 92 if (relAttribute.m_iconType != InvalidIcon && href.isValid() && !href.isEmpty()) { 93 if (!m_client->shouldLoadLink()) 94 return false; 95 document->addIconURL(href.string(), type, sizes, relAttribute.m_iconType); 96 } 97 98 if (relAttribute.m_isDNSPrefetch) { 99 Settings* settings = document->settings(); 100 // FIXME: The href attribute of the link element can be in "//hostname" form, and we shouldn't attempt 101 // to complete that as URL <https://bugs.webkit.org/show_bug.cgi?id=48857>. 102 if (settings && settings->dnsPrefetchingEnabled() && href.isValid() && !href.isEmpty()) 103 prefetchDNS(href.host()); 104 } 105 106#if ENABLE(LINK_PREFETCH) 107 if ((relAttribute.m_isLinkPrefetch || relAttribute.m_isLinkSubresource) && href.isValid() && document->frame()) { 108 if (!m_client->shouldLoadLink()) 109 return false; 110 ResourceLoadPriority priority = ResourceLoadPriorityUnresolved; 111 CachedResource::Type type = CachedResource::LinkPrefetch; 112 // We only make one request to the cachedresourcelodaer if multiple rel types are 113 // specified, 114 if (relAttribute.m_isLinkSubresource) { 115 priority = ResourceLoadPriorityLow; 116 type = CachedResource::LinkSubresource; 117 } 118 CachedResourceRequest linkRequest(ResourceRequest(document->completeURL(href)), priority); 119 120 if (m_cachedLinkResource) { 121 m_cachedLinkResource->removeClient(this); 122 m_cachedLinkResource = 0; 123 } 124 m_cachedLinkResource = document->cachedResourceLoader()->requestLinkResource(type, linkRequest); 125 if (m_cachedLinkResource) 126 m_cachedLinkResource->addClient(this); 127 } 128#endif 129 130 return true; 131} 132 133void LinkLoader::released() 134{ 135} 136 137} 138