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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_REQUEST_UTILS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_REQUEST_UTILS_H_
#include <optional>
#include "third_party/blink/public/platform/resource_request_blocked_reason.h"
#include "third_party/blink/public/platform/web_common.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_client_settings_object.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_context.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_parameters.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource.h"
namespace blink {
// This method simply takes in information about a ResourceRequest, and returns
// if the resource should be loaded in parallel (incremental) or sequentially
// for protocols that support multiplexing and HTTP extensible priorities
// (RFC 9218).
// Most content types can be operated on with partial data (document parsing,
// images, media, etc) but a few need to be complete before they can be
// processed.
bool BLINK_PLATFORM_EXPORT ShouldLoadIncremental(ResourceType type);
void SetReferrer(ResourceRequest& request,
const FetchClientSettingsObject& fetch_client_settings_object);
// Returns the adjusted version of `priority` according to the given
// `fetch_priority_hint` and `render_blocking_behavior`.
ResourceLoadPriority BLINK_PLATFORM_EXPORT
AdjustPriorityWithPriorityHintAndRenderBlocking(
ResourceLoadPriority priority,
ResourceType type,
mojom::blink::FetchPriorityHint fetch_priority_hint,
RenderBlockingBehavior render_blocking_behavior);
// Used by PrepareResourceRequestForCacheAccess() and
// UpgradeResourceRequestForLoader().
class ResourceRequestContext {
public:
// Computes the ResourceLoadPriority. This is called if the priority was not
// set.
virtual ResourceLoadPriority ComputeLoadPriority(
const FetchParameters& params) = 0;
// Called to record a trace.
virtual void RecordTrace() = 0;
protected:
virtual ~ResourceRequestContext() = default;
};
// Prepares the underlying ResourceRequest for `params` with enough information
// to do a cache lookup. If a cached value is not used,
// UpgradeResourceRequestForLoader() must be called.
//
// `bundle_url_for_uuid_resources` is an optional bundle URL for
// uuid-in-package: resources for security checks. Should only be set when the
// request is WebBundle.
//
// Returns std::nullopt if loading the ResourceRequest in `params` is not
// blocked. Otherwise, returns a blocked reason.
// This method may modify the ResourceRequest in `params` according to
// `context` and `resource_type`.
BLINK_PLATFORM_EXPORT std::optional<ResourceRequestBlockedReason>
PrepareResourceRequestForCacheAccess(
ResourceType type,
const FetchClientSettingsObject& fetch_client_settings_object,
const KURL& bundle_url_for_uuid_resources,
ResourceRequestContext& resource_request_context,
FetchContext& context,
FetchParameters& params);
BLINK_PLATFORM_EXPORT void UpgradeResourceRequestForLoader(
ResourceType resource_type,
FetchParameters& params,
FetchContext& context,
ResourceRequestContext& resource_request_context,
WebScopedVirtualTimePauser& virtual_time_pauser);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_REQUEST_UTILS_H_
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