| // 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 |