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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 COMPONENTS_POLICY_CONTENT_SAFE_SITES_NAVIGATION_THROTTLE_H_
#define COMPONENTS_POLICY_CONTENT_SAFE_SITES_NAVIGATION_THROTTLE_H_
#include <optional>
#include <string_view>
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "components/policy/content/proceed_until_response_navigation_throttle.h"
#include "content/public/browser/navigation_throttle.h"
class SafeSearchService;
namespace content {
class BrowserContext;
class NavigationThrottleRegistry;
} // namespace content
// SafeSitesNavigationThrottle provides a simple way to block a navigation
// based on the Safe Search API. The URL is checked against the Safe Search API.
// The check may be asynchronous if the result hasn't been cached yet.
// This class does not check the SafeSitesFilterBehavior policy.
class SafeSitesNavigationThrottle
: public ProceedUntilResponseNavigationThrottle::Client {
public:
SafeSitesNavigationThrottle(content::NavigationThrottleRegistry& registry,
content::BrowserContext* context,
std::optional<std::string_view>
safe_sites_error_page_content = std::nullopt);
SafeSitesNavigationThrottle(const SafeSitesNavigationThrottle&) = delete;
SafeSitesNavigationThrottle& operator=(const SafeSitesNavigationThrottle&) =
delete;
~SafeSitesNavigationThrottle() override;
// ProceedUntilResponseNavigationThrottle::Client overrides.
void SetDeferredResultCallback(
const ProceedUntilResponseNavigationThrottle::DeferredResultCallback&
deferred_result_callback) override;
// NavigationThrottle overrides.
ThrottleCheckResult WillStartRequest() override;
ThrottleCheckResult WillRedirectRequest() override;
const char* GetNameForLogging() override;
private:
// Callback from SafeSearchService.
void CheckSafeSearchCallback(bool is_safe);
// The default implementation DeferredResultCallback.
void OnDeferredResult(bool proceed,
std::optional<ThrottleCheckResult> result);
// Creates the result to be returned when navigation is canceled.
ThrottleCheckResult CreateCancelResult() const;
raw_ptr<SafeSearchService, DanglingUntriaged> safe_search_service_;
ProceedUntilResponseNavigationThrottle::DeferredResultCallback
deferred_result_callback_;
// HTML to be displayed when navigation is canceled by the Safe Sites filter.
// If null, a default error page will be displayed.
const std::optional<std::string> safe_sites_error_page_content_;
// Whether the request was deferred in order to check the Safe Search API.
bool deferred_ = false;
// Whether the Safe Search API callback determined the in-progress navigation
// should be canceled.
bool should_cancel_ = false;
base::WeakPtrFactory<SafeSitesNavigationThrottle> weak_ptr_factory_{this};
};
#endif // COMPONENTS_POLICY_CONTENT_SAFE_SITES_NAVIGATION_THROTTLE_H_
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