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/*
* Copyright (C) 2005, 2006, 2011 Apple 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
#ifndef ResourceLoader_h
#define ResourceLoader_h
#include "core/CoreExport.h"
#include "core/fetch/ResourceLoaderOptions.h"
#include "platform/network/ResourceRequest.h"
#include "public/platform/WebURLLoader.h"
#include "public/platform/WebURLLoaderClient.h"
#include "wtf/Forward.h"
#include <memory>
namespace blink {
class FetchContext;
class Resource;
class ResourceError;
class ResourceFetcher;
// A ResourceLoader is created for each Resource by the ResourceFetcher when it
// needs to load the specified resource. A ResourceLoader creates a
// WebURLLoader and loads the resource using it. Any per-load logic should be
// implemented in this class basically.
class CORE_EXPORT ResourceLoader final
: public GarbageCollectedFinalized<ResourceLoader>,
protected WebURLLoaderClient {
USING_PRE_FINALIZER(ResourceLoader, dispose);
public:
static ResourceLoader* create(ResourceFetcher*, Resource*);
~ResourceLoader() override;
DECLARE_TRACE();
void start(const ResourceRequest&);
void cancel();
void setDefersLoading(bool);
void didChangePriority(ResourceLoadPriority, int intraPriorityValue);
// Called before start() to activate cache-aware loading if enabled in
// |m_resource->options()| and applicable.
void activateCacheAwareLoadingIfNeeded(const ResourceRequest&);
bool isCacheAwareLoadingActivated() const {
return m_isCacheAwareLoadingActivated;
}
// WebURLLoaderClient
//
// A succesful load will consist of:
// 0+ willFollowRedirect()
// 0+ didSendData()
// 1 didReceiveResponse()
// 0-1 didReceiveCachedMetadata()
// 0+ didReceiveData() or didDownloadData(), but never both
// 1 didFinishLoading()
// A failed load is indicated by 1 didFail(), which can occur at any time
// before didFinishLoading(), including synchronous inside one of the other
// callbacks via ResourceLoader::cancel()
bool willFollowRedirect(WebURLRequest&,
const WebURLResponse& redirectResponse) override;
void didSendData(unsigned long long bytesSent,
unsigned long long totalBytesToBeSent) override;
void didReceiveResponse(const WebURLResponse&) override;
void didReceiveResponse(const WebURLResponse&,
std::unique_ptr<WebDataConsumerHandle>) override;
void didReceiveCachedMetadata(const char* data, int length) override;
void didReceiveData(const char*, int) override;
void didReceiveTransferSizeUpdate(int transferSizeDiff) override;
void didDownloadData(int, int) override;
void didFinishLoading(double finishTime,
int64_t encodedDataLength,
int64_t encodedBodyLength) override;
void didFail(const WebURLError&,
int64_t encodedDataLength,
int64_t encodedBodyLength) override;
void handleError(const ResourceError&);
void didFinishLoadingFirstPartInMultipart();
private:
// Assumes ResourceFetcher and Resource are non-null.
ResourceLoader(ResourceFetcher*, Resource*);
// This method is currently only used for service worker fallback request and
// cache-aware loading, other users should be careful not to break
// ResourceLoader state.
void restart(const ResourceRequest&);
FetchContext& context() const;
ResourceRequestBlockedReason canAccessResponse(Resource*,
const ResourceResponse&) const;
void cancelForRedirectAccessCheckError(const KURL&,
ResourceRequestBlockedReason);
void requestSynchronously(const ResourceRequest&);
void dispose();
std::unique_ptr<WebURLLoader> m_loader;
Member<ResourceFetcher> m_fetcher;
Member<Resource> m_resource;
bool m_isCacheAwareLoadingActivated;
};
} // namespace blink
#endif
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