1 /* 2 * Copyright (C) 2006 Apple Computer, 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 #include "config.h" 27 #include "IconLoader.h" 28 29 #include "Document.h" 30 #include "Frame.h" 31 #include "FrameLoader.h" 32 #include "FrameLoaderClient.h" 33 #include "IconDatabase.h" 34 #include "Logging.h" 35 #include "ResourceHandle.h" 36 #include "ResourceResponse.h" 37 #include "ResourceRequest.h" 38 #include "SharedBuffer.h" 39 #include "SubresourceLoader.h" 40 #include <wtf/UnusedParam.h> 41 42 using namespace std; 43 44 namespace WebCore { 45 46 IconLoader::IconLoader(Frame* frame) 47 : m_frame(frame) 48 , m_loadIsInProgress(false) 49 { 50 } 51 52 auto_ptr<IconLoader> IconLoader::create(Frame* frame) 53 { 54 return auto_ptr<IconLoader>(new IconLoader(frame)); 55 } 56 57 IconLoader::~IconLoader() 58 { 59 } 60 61 void IconLoader::startLoading() 62 { 63 if (m_resourceLoader) 64 return; 65 66 // Set flag so we can detect the case where the load completes before 67 // SubresourceLoader::create returns. 68 m_loadIsInProgress = true; 69 70 RefPtr<SubresourceLoader> loader = SubresourceLoader::create(m_frame, this, m_frame->loader()->iconURL()); 71 if (!loader) 72 LOG_ERROR("Failed to start load for icon at url %s", m_frame->loader()->iconURL().string().ascii().data()); 73 74 // Store the handle so we can cancel the load if stopLoading is called later. 75 // But only do it if the load hasn't already completed. 76 if (m_loadIsInProgress) 77 m_resourceLoader = loader.release(); 78 } 79 80 void IconLoader::stopLoading() 81 { 82 clearLoadingState(); 83 } 84 85 void IconLoader::didReceiveResponse(SubresourceLoader* resourceLoader, const ResourceResponse& response) 86 { 87 // If we got a status code indicating an invalid response, then lets 88 // ignore the data and not try to decode the error page as an icon. 89 int status = response.httpStatusCode(); 90 LOG(IconDatabase, "IconLoader::didReceiveResponse() - Loader %p, response %i", resourceLoader, status); 91 92 if (status && (status < 200 || status > 299)) { 93 ResourceHandle* handle = resourceLoader->handle(); 94 finishLoading(handle ? handle->request().url() : KURL(), 0); 95 } 96 } 97 98 void IconLoader::didReceiveData(SubresourceLoader* unusedLoader, const char*, int unusedSize) 99 { 100 #if LOG_DISABLED 101 UNUSED_PARAM(unusedLoader); 102 UNUSED_PARAM(unusedSize); 103 #endif 104 LOG(IconDatabase, "IconLoader::didReceiveData() - Loader %p, number of bytes %i", unusedLoader, unusedSize); 105 } 106 107 void IconLoader::didFail(SubresourceLoader* resourceLoader, const ResourceError&) 108 { 109 LOG(IconDatabase, "IconLoader::didFail() - Loader %p", resourceLoader); 110 111 // Until <rdar://problem/5463392> is resolved and we can properly cancel SubresourceLoaders when they get an error response, 112 // we need to be prepared to receive this call even after we've "finished loading" once. 113 // After it is resolved, we can restore an assertion that the load is in progress if ::didFail() is called 114 115 if (m_loadIsInProgress) { 116 ASSERT(resourceLoader == m_resourceLoader); 117 ResourceHandle* handle = resourceLoader->handle(); 118 finishLoading(handle ? handle->request().url() : KURL(), 0); 119 } 120 } 121 122 void IconLoader::didReceiveAuthenticationChallenge(SubresourceLoader*, const AuthenticationChallenge&) 123 { 124 // We don't ever want to prompt for authentication just for a site icon, so 125 // implement this method to cancel the resource load 126 m_resourceLoader->cancel(); 127 } 128 129 void IconLoader::didFinishLoading(SubresourceLoader* resourceLoader) 130 { 131 LOG(IconDatabase, "IconLoader::didFinishLoading() - Loader %p", resourceLoader); 132 133 // Until <rdar://problem/5463392> is resolved and we can properly cancel SubresourceLoaders when they get an error response, 134 // we need to be prepared to receive this call even after we've "finished loading" once. 135 // After it is resolved, we can restore an assertion that the load is in progress if ::didFail() is called 136 137 if (m_loadIsInProgress) { 138 ASSERT(resourceLoader == m_resourceLoader); 139 ResourceHandle* handle = resourceLoader->handle(); 140 finishLoading(handle ? handle->request().url() : KURL(), m_resourceLoader->resourceData()); 141 } 142 } 143 144 void IconLoader::finishLoading(const KURL& iconURL, PassRefPtr<SharedBuffer> data) 145 { 146 // When an icon load results in a 404 we commit it to the database here and clear the loading state. 147 // But the SubresourceLoader continues pulling in data in the background for the 404 page if the server sends one. 148 // Once that data finishes loading or if the load is cancelled while that data is being read, finishLoading ends up being called a second time. 149 // We need to change SubresourceLoader to have a mode where it will stop itself after receiving a 404 so this won't happen - 150 // in the meantime, we'll only commit this data to the IconDatabase if it's the first time ::finishLoading() is called 151 // <rdar://problem/5463392> tracks that enhancement 152 153 if (!iconURL.isEmpty() && m_loadIsInProgress) { 154 LOG(IconDatabase, "IconLoader::finishLoading() - Committing iconURL %s to database", iconURL.string().ascii().data()); 155 m_frame->loader()->commitIconURLToIconDatabase(iconURL); 156 // Setting the icon data only after committing to the database ensures that the data is 157 // kept in memory (so it does not have to be read from the database asynchronously), since 158 // there is a page URL referencing it. 159 iconDatabase()->setIconDataForIconURL(data, iconURL.string()); 160 m_frame->loader()->client()->dispatchDidReceiveIcon(); 161 } 162 163 clearLoadingState(); 164 } 165 166 void IconLoader::clearLoadingState() 167 { 168 m_resourceLoader = 0; 169 m_loadIsInProgress = false; 170 } 171 172 } 173
