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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DATA_REDUCTION_PROXY_CONTENT_BROWSER_CONTENT_LOFI_DECIDER_H_
#define COMPONENTS_DATA_REDUCTION_PROXY_CONTENT_BROWSER_CONTENT_LOFI_DECIDER_H_
#include "components/data_reduction_proxy/core/common/lofi_decider.h"
#include "base/macros.h"
#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_data.h"
#include "content/public/common/previews_state.h"
class GURL;
namespace net {
class HttpRequestHeaders;
class URLRequest;
}
namespace previews {
class PreviewsDecider;
}
namespace data_reduction_proxy {
// Class responsible for deciding whether a request should be requested with low
// fidelity (Lo-Fi) or not. Relies on the Lo-Fi mode state stored in the
// request's content::ResourceRequestInfo, which must be fetched using
// content::ResourceRequestInfo::ForRequest. Lo-Fi mode will not be enabled for
// requests that don't have a ResourceRequestInfo, such as background requests.
// Owned by DataReductionProxyIOData and should be called on the IO thread.
class ContentLoFiDecider : public LoFiDecider {
public:
ContentLoFiDecider();
~ContentLoFiDecider() override;
// Returns an updated PreviewsState with respect to server previews
// given the main frame's committed |request| and the |initial_state|
// of enabled previews. |request| must have already been updated with
// respect to the main frame response headers.
static content::PreviewsState DetermineCommittedServerPreviewsState(
const net::URLRequest& request,
content::PreviewsState initial_state);
// LoFiDecider implementation:
void MaybeSetAcceptTransformHeader(
const net::URLRequest& request,
net::HttpRequestHeaders* headers) const override;
bool IsSlowPagePreviewRequested(
const net::HttpRequestHeaders& headers) const override;
bool IsLitePagePreviewRequested(
const net::HttpRequestHeaders& headers) const override;
void RemoveAcceptTransformHeader(
net::HttpRequestHeaders* headers) const override;
bool ShouldRecordLoFiUMA(const net::URLRequest& request) const override;
bool IsClientLoFiImageRequest(const net::URLRequest& request) const override;
bool IsClientLoFiAutoReloadRequest(
const net::URLRequest& request) const override;
void MaybeApplyAMPPreview(
net::URLRequest* request,
GURL* new_url,
previews::PreviewsDecider* previews_decider) const override;
private:
DISALLOW_COPY_AND_ASSIGN(ContentLoFiDecider);
};
} // namespace data_reduction_proxy
#endif // COMPONENTS_DATA_REDUCTION_PROXY_CONTENT_BROWSER_CONTENT_LOFI_DECIDER_H_
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