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// Copyright 2017 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 THIRD_PARTY_BLINK_PUBLIC_COMMON_CLIENT_HINTS_CLIENT_HINTS_H_
#define THIRD_PARTY_BLINK_PUBLIC_COMMON_CLIENT_HINTS_CLIENT_HINTS_H_
#include <stddef.h>
#include <string>
#include "services/network/public/mojom/web_client_hints_types.mojom-shared.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "third_party/blink/public/common/common_export.h"
#include "third_party/blink/public/mojom/permissions_policy/permissions_policy_feature.mojom.h"
class GURL;
namespace blink {
class PermissionsPolicy;
// Mapping from WebClientHintsType to the hint's outgoing header
// (e.g. kLang => "sec-ch-lang"). The ordering matches the ordering of enums in
// services/network/public/mojom/web_client_hints_types.mojom
BLINK_COMMON_EXPORT extern const char* const kClientHintsHeaderMapping[];
// Mapping from WebClientHintsType to the corresponding Permissions-Policy (e.g.
// kDpr => kClientHintsDPR). The order matches the header mapping and the enum
// order in services/network/public/mojom/web_client_hints_types.mojom
BLINK_COMMON_EXPORT extern const mojom::PermissionsPolicyFeature
kClientHintsPermissionsPolicyMapping[];
// The size of the mapping arrays.
BLINK_COMMON_EXPORT extern const size_t kClientHintsMappingsCount;
// Mapping from WebEffectiveConnectionType to the header value. This value is
// sent to the origins and is returned by the JavaScript API. The ordering
// should match the ordering in //net/nqe/effective_connection_type.h and
// public/platform/WebEffectiveConnectionType.h.
// This array should be updated if either of the enums in
// effective_connection_type.h or WebEffectiveConnectionType.h are updated.
BLINK_COMMON_EXPORT extern const char* const
kWebEffectiveConnectionTypeMapping[];
BLINK_COMMON_EXPORT extern const size_t kWebEffectiveConnectionTypeMappingCount;
// Given a comma-separated, ordered list of language codes, return the list
// formatted as a structured header, as described in
// https://tools.ietf.org/html/draft-west-lang-client-hint-00#section-2.1
std::string BLINK_COMMON_EXPORT
SerializeLangClientHint(const std::string& raw_language_list);
// Indicates that a hint is sent by default, regardless of an opt-in.
BLINK_COMMON_EXPORT
bool IsClientHintSentByDefault(network::mojom::WebClientHintsType type);
// Add a list of Client Hints headers to be removed to the output vector, based
// on Permissions Policy and the url's origin.
BLINK_COMMON_EXPORT void FindClientHintsToRemove(
const PermissionsPolicy* permissions_policy,
const GURL& url,
std::vector<std::string>* removed_headers);
} // namespace blink
#endif // THIRD_PARTY_BLINK_PUBLIC_COMMON_CLIENT_HINTS_CLIENT_HINTS_H_
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