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/*
* 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 "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 = SubresourceLoader::create(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;
}
}
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