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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_CLIENT_HINTS_CRITICAL_CLIENT_HINTS_THROTTLE_H_
#define CONTENT_BROWSER_CLIENT_HINTS_CRITICAL_CLIENT_HINTS_THROTTLE_H_
#include "base/containers/flat_set.h"
#include "base/memory/raw_ptr.h"
#include "content/public/browser/frame_tree_node_id.h"
#include "net/http/http_request_headers.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "third_party/blink/public/common/loader/url_loader_throttle.h"
namespace {
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class CriticalCHRestart {
kNavigationStarted = 0,
kHeaderPresent = 1,
kNavigationRestarted = 2,
kMaxValue = kNavigationRestarted,
};
} // namespace
namespace content {
class BrowserContext;
class ClientHintsControllerDelegate;
class CriticalClientHintsThrottle : public blink::URLLoaderThrottle {
public:
CriticalClientHintsThrottle(
BrowserContext* context,
ClientHintsControllerDelegate* client_hint_delegate,
FrameTreeNodeId frame_tree_node_id);
~CriticalClientHintsThrottle() override;
// blink::URLLoaderThrottle
void WillStartRequest(network::ResourceRequest* request,
bool* defer) override;
void BeforeWillProcessResponse(
const GURL& response_url,
const network::mojom::URLResponseHead& response_head,
RestartWithURLReset* restart_with_url_reset) override;
void BeforeWillRedirectRequest(
net::RedirectInfo* redirect_info,
const network::mojom::URLResponseHead& response_head,
RestartWithURLReset* restart_with_url_reset,
std::vector<std::string>* to_be_removed_request_headers,
net::HttpRequestHeaders* modified_request_headers,
net::HttpRequestHeaders* modified_cors_exempt_request_headers) override;
private:
// Contains the logic for whether or not the navigation should restart, and
// persists the Accept-CH header if there is a restart.
void MaybeRestartWithHints(
const network::mojom::URLResponseHead& response_head,
RestartWithURLReset* restart_with_url_reset);
raw_ptr<BrowserContext> context_;
raw_ptr<ClientHintsControllerDelegate> client_hint_delegate_;
FrameTreeNodeId frame_tree_node_id_;
// Ensure that there's only one restart per origin
base::flat_set<url::Origin> restarted_origins_;
// Url of the last request made.
GURL response_url_;
// Headers from the initial request. This should include headers added from an
// ACCEPT_CH frame that aren't in storage.
net::HttpRequestHeaders initial_request_headers_;
};
} // namespace content
#endif // CONTENT_BROWSER_CLIENT_HINTS_CRITICAL_CLIENT_HINTS_THROTTLE_H_
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