blob: 835cf4c6aa282026fa9f94beb906094177843792 [file] [log] [blame]
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/public/common/client_hints/client_hints.h"
#include <utility>
#include <vector>
#include "base/feature_list.h"
#include "base/no_destructor.h"
#include "base/strings/strcat.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "services/network/public/cpp/client_hints.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/common/permissions_policy/permissions_policy.h"
#include "url/origin.h"
namespace blink {
ClientHintToPolicyFeatureMap MakeClientHintToPolicyFeatureMap() {
return {
{network::mojom::WebClientHintsType::kDeviceMemory_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintDeviceMemory},
{network::mojom::WebClientHintsType::kDpr_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintDPR},
{network::mojom::WebClientHintsType::kResourceWidth_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintWidth},
{network::mojom::WebClientHintsType::kViewportWidth_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintViewportWidth},
{network::mojom::WebClientHintsType::kRtt_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintRTT},
{network::mojom::WebClientHintsType::kDownlink_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintDownlink},
{network::mojom::WebClientHintsType::kEct_DEPRECATED,
mojom::PermissionsPolicyFeature::kClientHintECT},
{network::mojom::WebClientHintsType::kUA,
mojom::PermissionsPolicyFeature::kClientHintUA},
{network::mojom::WebClientHintsType::kUAArch,
mojom::PermissionsPolicyFeature::kClientHintUAArch},
{network::mojom::WebClientHintsType::kUAPlatform,
mojom::PermissionsPolicyFeature::kClientHintUAPlatform},
{network::mojom::WebClientHintsType::kUAModel,
mojom::PermissionsPolicyFeature::kClientHintUAModel},
{network::mojom::WebClientHintsType::kUAMobile,
mojom::PermissionsPolicyFeature::kClientHintUAMobile},
{network::mojom::WebClientHintsType::kUAFullVersion,
mojom::PermissionsPolicyFeature::kClientHintUAFullVersion},
{network::mojom::WebClientHintsType::kUAPlatformVersion,
mojom::PermissionsPolicyFeature::kClientHintUAPlatformVersion},
{network::mojom::WebClientHintsType::kPrefersColorScheme,
mojom::PermissionsPolicyFeature::kClientHintPrefersColorScheme},
{network::mojom::WebClientHintsType::kUABitness,
mojom::PermissionsPolicyFeature::kClientHintUABitness},
{network::mojom::WebClientHintsType::kViewportHeight,
mojom::PermissionsPolicyFeature::kClientHintViewportHeight},
{network::mojom::WebClientHintsType::kDeviceMemory,
mojom::PermissionsPolicyFeature::kClientHintDeviceMemory},
{network::mojom::WebClientHintsType::kDpr,
mojom::PermissionsPolicyFeature::kClientHintDPR},
{network::mojom::WebClientHintsType::kResourceWidth,
mojom::PermissionsPolicyFeature::kClientHintWidth},
{network::mojom::WebClientHintsType::kViewportWidth,
mojom::PermissionsPolicyFeature::kClientHintViewportWidth},
{network::mojom::WebClientHintsType::kUAFullVersionList,
mojom::PermissionsPolicyFeature::kClientHintUAFullVersionList},
{network::mojom::WebClientHintsType::kUAWoW64,
mojom::PermissionsPolicyFeature::kClientHintUAWoW64},
{network::mojom::WebClientHintsType::kSaveData,
mojom::PermissionsPolicyFeature::kClientHintSaveData},
{network::mojom::WebClientHintsType::kPrefersReducedMotion,
mojom::PermissionsPolicyFeature::kClientHintPrefersReducedMotion},
{network::mojom::WebClientHintsType::kUAFormFactors,
mojom::PermissionsPolicyFeature::kClientHintUAFormFactors},
{network::mojom::WebClientHintsType::kPrefersReducedTransparency,
mojom::PermissionsPolicyFeature::kClientHintPrefersReducedTransparency},
};
}
const ClientHintToPolicyFeatureMap& GetClientHintToPolicyFeatureMap() {
DCHECK_EQ(network::GetClientHintToNameMap().size(),
MakeClientHintToPolicyFeatureMap().size());
static const base::NoDestructor<ClientHintToPolicyFeatureMap> map(
MakeClientHintToPolicyFeatureMap());
return *map;
}
PolicyFeatureToClientHintMap MakePolicyFeatureToClientHintMap() {
PolicyFeatureToClientHintMap map;
for (const auto& pair : GetClientHintToPolicyFeatureMap()) {
if (map.contains(pair.second)) {
map[pair.second].insert(pair.first);
} else {
map[pair.second] = {pair.first};
}
}
return map;
}
const PolicyFeatureToClientHintMap& GetPolicyFeatureToClientHintMap() {
static const base::NoDestructor<PolicyFeatureToClientHintMap> map(
MakePolicyFeatureToClientHintMap());
return *map;
}
bool IsClientHintSentByDefault(network::mojom::WebClientHintsType type) {
switch (type) {
case network::mojom::WebClientHintsType::kSaveData:
case network::mojom::WebClientHintsType::kUA:
case network::mojom::WebClientHintsType::kUAMobile:
case network::mojom::WebClientHintsType::kUAPlatform:
return true;
default:
return false;
}
}
// Add a list of Client Hints headers to be removed to the output vector, based
// on PermissionsPolicy and the url's origin.
void FindClientHintsToRemove(const PermissionsPolicy* permissions_policy,
const GURL& url,
std::vector<std::string>* removed_headers) {
DCHECK(removed_headers);
url::Origin origin = url::Origin::Create(url);
for (const auto& elem : network::GetClientHintToNameMap()) {
const auto& type = elem.first;
const auto& header = elem.second;
// Remove the hint if any is true:
// * Permissions policy is null (we're in a sync XHR case) and the hint is
// not sent by default.
// * Permissions policy exists and doesn't allow for the hint.
if ((!permissions_policy && !IsClientHintSentByDefault(type)) ||
(permissions_policy &&
!permissions_policy->IsFeatureEnabledForOrigin(
blink::GetClientHintToPolicyFeatureMap().at(type), origin))) {
removed_headers->push_back(header);
}
}
}
} // namespace blink