1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// 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 "services/network/public/cpp/permissions_policy/client_hints_permissions_policy_mapping.h"
#include "services/network/public/cpp/permissions_policy/permissions_policy.h"
#include "third_party/blink/public/common/features.h"
#include "url/origin.h"
namespace blink {
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 network::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(
network::GetClientHintToPolicyFeatureMap().at(type), origin))) {
removed_headers->push_back(header);
}
}
}
} // namespace blink
|
