1 files changed, 174 insertions, 0 deletions
diff --git a/Source/WebCore/loader/icon/IconLoader.cpp b/Source/WebCore/loader/icon/IconLoader.cpp
new file mode 100644
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--- /dev/null
+++ b/Source/WebCore/loader/icon/IconLoader.cpp
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+ 
+#include "config.h"
+#include "IconLoader.h"
+
+#include "Document.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameLoaderClient.h"
+#include "IconDatabase.h"
+#include "Logging.h"
+#include "ResourceHandle.h"
+#include "ResourceLoadScheduler.h"
+#include "ResourceResponse.h"
+#include "ResourceRequest.h"
+#include "SharedBuffer.h"
+#include "SubresourceLoader.h"
+#include <wtf/UnusedParam.h>
+#include <wtf/text/CString.h>
+
+using namespace std;
+
+namespace WebCore {
+
+IconLoader::IconLoader(Frame* frame)
+    : m_frame(frame)
+    , m_loadIsInProgress(false)
+{
+}
+
+PassOwnPtr<IconLoader> IconLoader::create(Frame* frame)
+{
+    return adoptPtr(new IconLoader(frame));
+}
+
+IconLoader::~IconLoader()
+{
+}
+
+void IconLoader::startLoading()
+{    
+    if (m_resourceLoader)
+        return;
+
+    // Set flag so we can detect the case where the load completes before
+    // SubresourceLoader::create returns.
+    m_loadIsInProgress = true;
+
+    RefPtr<SubresourceLoader> loader = resourceLoadScheduler()->scheduleSubresourceLoad(m_frame, this, m_frame->loader()->iconURL());
+    if (!loader)
+        LOG_ERROR("Failed to start load for icon at url %s", m_frame->loader()->iconURL().string().ascii().data());
+
+    // Store the handle so we can cancel the load if stopLoading is called later.
+    // But only do it if the load hasn't already completed.
+    if (m_loadIsInProgress)
+        m_resourceLoader = loader.release();
+}
+
+void IconLoader::stopLoading()
+{
+    clearLoadingState();
+}
+
+void IconLoader::didReceiveResponse(SubresourceLoader* resourceLoader, const ResourceResponse& response)
+{
+    // If we got a status code indicating an invalid response, then lets
+    // ignore the data and not try to decode the error page as an icon.
+    int status = response.httpStatusCode();
+    LOG(IconDatabase, "IconLoader::didReceiveResponse() - Loader %p, response %i", resourceLoader, status);
+
+    if (status && (status < 200 || status > 299)) {
+        ResourceHandle* handle = resourceLoader->handle();
+        finishLoading(handle ? handle->firstRequest().url() : KURL(), 0);
+    }
+}
+
+void IconLoader::didReceiveData(SubresourceLoader* unusedLoader, const char*, int unusedSize)
+{
+#if LOG_DISABLED
+    UNUSED_PARAM(unusedLoader);
+    UNUSED_PARAM(unusedSize);
+#endif
+    LOG(IconDatabase, "IconLoader::didReceiveData() - Loader %p, number of bytes %i", unusedLoader, unusedSize);
+}
+
+void IconLoader::didFail(SubresourceLoader* resourceLoader, const ResourceError&)
+{
+    LOG(IconDatabase, "IconLoader::didFail() - Loader %p", resourceLoader);
+    
+    // Until <rdar://problem/5463392> is resolved and we can properly cancel SubresourceLoaders when they get an error response,
+    // we need to be prepared to receive this call even after we've "finished loading" once.
+    // After it is resolved, we can restore an assertion that the load is in progress if ::didFail() is called
+    
+    if (m_loadIsInProgress) {
+        ASSERT(resourceLoader == m_resourceLoader);
+        ResourceHandle* handle = resourceLoader->handle();
+        finishLoading(handle ? handle->firstRequest().url() : KURL(), 0);
+    }
+}
+
+void IconLoader::didReceiveAuthenticationChallenge(SubresourceLoader*, const AuthenticationChallenge&)
+{
+    // We don't ever want to prompt for authentication just for a site icon, so
+    // implement this method to cancel the resource load
+    m_resourceLoader->cancel();
+}
+
+void IconLoader::didFinishLoading(SubresourceLoader* resourceLoader)
+{
+    LOG(IconDatabase, "IconLoader::didFinishLoading() - Loader %p", resourceLoader);
+
+    // Until <rdar://problem/5463392> is resolved and we can properly cancel SubresourceLoaders when they get an error response,
+    // we need to be prepared to receive this call even after we've "finished loading" once.
+    // After it is resolved, we can restore an assertion that the load is in progress if ::didFail() is called
+    
+    if (m_loadIsInProgress) {
+        ASSERT(resourceLoader == m_resourceLoader);
+        ResourceHandle* handle = resourceLoader->handle();
+        finishLoading(handle ? handle->firstRequest().url() : KURL(), m_resourceLoader->resourceData());
+    }
+}
+
+void IconLoader::finishLoading(const KURL& iconURL, PassRefPtr<SharedBuffer> data)
+{
+    // When an icon load results in a 404 we commit it to the database here and clear the loading state.  
+    // But the SubresourceLoader continues pulling in data in the background for the 404 page if the server sends one.  
+    // 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.
+    // We need to change SubresourceLoader to have a mode where it will stop itself after receiving a 404 so this won't happen -
+    // in the meantime, we'll only commit this data to the IconDatabase if it's the first time ::finishLoading() is called
+    // <rdar://problem/5463392> tracks that enhancement
+    
+    if (!iconURL.isEmpty() && m_loadIsInProgress) {
+        LOG(IconDatabase, "IconLoader::finishLoading() - Committing iconURL %s to database", iconURL.string().ascii().data());
+        m_frame->loader()->commitIconURLToIconDatabase(iconURL);
+        // Setting the icon data only after committing to the database ensures that the data is
+        // kept in memory (so it does not have to be read from the database asynchronously), since
+        // there is a page URL referencing it.
+        iconDatabase()->setIconDataForIconURL(data, iconURL.string());
+        m_frame->loader()->client()->dispatchDidReceiveIcon();
+    }
+
+    clearLoadingState();
+}
+
+void IconLoader::clearLoadingState()
+{
+    m_resourceLoader = 0;
+    m_loadIsInProgress = false;
+}
+
+}