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// Copyright 2015 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/renderer/modules/plugins/navigator_plugins.h"
#include "third_party/blink/public/common/privacy_budget/identifiability_metric_builder.h"
#include "third_party/blink/public/common/privacy_budget/identifiability_study_settings.h"
#include "third_party/blink/public/common/privacy_budget/identifiable_token_builder.h"
#include "third_party/blink/public/mojom/use_counter/metrics/web_feature.mojom-blink.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/navigator.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/modules/plugins/dom_mime_type.h"
#include "third_party/blink/renderer/modules/plugins/dom_mime_type_array.h"
#include "third_party/blink/renderer/modules/plugins/dom_plugin_array.h"
#include "third_party/blink/renderer/platform/privacy_budget/identifiability_digest_helpers.h"
namespace blink {
namespace {
bool ShouldReturnFixedPluginData(Navigator& navigator) {
if (auto* window = navigator.DomWindow()) {
if (auto* frame = window->GetFrame()) {
if (frame->GetSettings()->GetAllowNonEmptyNavigatorPlugins()) {
// See https://crbug.com/1171373 for more context. P/Nacl plugins will
// be supported on some platforms through at least June, 2022. Since
// some apps need to use feature detection, we need to continue
// returning plugin data for those.
return false;
}
}
}
// Otherwise, return fixed plugin data.
return true;
}
} // namespace
NavigatorPlugins::NavigatorPlugins(Navigator& navigator)
: Supplement<Navigator>(navigator),
should_return_fixed_plugin_data_(ShouldReturnFixedPluginData(navigator)) {
}
// static
NavigatorPlugins& NavigatorPlugins::From(Navigator& navigator) {
NavigatorPlugins* supplement = ToNavigatorPlugins(navigator);
if (!supplement) {
supplement = MakeGarbageCollected<NavigatorPlugins>(navigator);
ProvideTo(navigator, supplement);
}
return *supplement;
}
// static
NavigatorPlugins* NavigatorPlugins::ToNavigatorPlugins(Navigator& navigator) {
return Supplement<Navigator>::From<NavigatorPlugins>(navigator);
}
// static
const char NavigatorPlugins::kSupplementName[] = "NavigatorPlugins";
// static
DOMPluginArray* NavigatorPlugins::plugins(Navigator& navigator) {
return NavigatorPlugins::From(navigator).plugins(navigator.DomWindow());
}
// static
DOMMimeTypeArray* NavigatorPlugins::mimeTypes(Navigator& navigator) {
return NavigatorPlugins::From(navigator).mimeTypes(navigator.DomWindow());
}
// static
bool NavigatorPlugins::pdfViewerEnabled(Navigator& navigator) {
return NavigatorPlugins::From(navigator).pdfViewerEnabled(
navigator.DomWindow());
}
// static
bool NavigatorPlugins::javaEnabled(Navigator& navigator) {
return false;
}
namespace {
void RecordPlugins(LocalDOMWindow* window, DOMPluginArray* plugins) {
if (!IdentifiabilityStudySettings::Get()->ShouldSampleWebFeature(
WebFeature::kNavigatorPlugins) ||
!window) {
return;
}
IdentifiableTokenBuilder builder;
for (unsigned i = 0; i < plugins->length(); i++) {
DOMPlugin* plugin = plugins->item(i);
builder.AddToken(IdentifiabilityBenignStringToken(plugin->name()));
builder.AddToken(IdentifiabilityBenignStringToken(plugin->description()));
builder.AddToken(IdentifiabilityBenignStringToken(plugin->filename()));
for (unsigned j = 0; j < plugin->length(); j++) {
DOMMimeType* mimeType = plugin->item(j);
builder.AddToken(IdentifiabilityBenignStringToken(mimeType->type()));
builder.AddToken(
IdentifiabilityBenignStringToken(mimeType->description()));
builder.AddToken(IdentifiabilityBenignStringToken(mimeType->suffixes()));
}
}
IdentifiabilityMetricBuilder(window->UkmSourceID())
.AddWebFeature(WebFeature::kNavigatorPlugins, builder.GetToken())
.Record(window->UkmRecorder());
}
void RecordMimeTypes(LocalDOMWindow* window, DOMMimeTypeArray* mime_types) {
constexpr IdentifiableSurface surface = IdentifiableSurface::FromTypeAndToken(
IdentifiableSurface::Type::kWebFeature, WebFeature::kNavigatorMimeTypes);
if (!IdentifiabilityStudySettings::Get()->ShouldSampleSurface(surface) ||
!window) {
return;
}
IdentifiableTokenBuilder builder;
for (unsigned i = 0; i < mime_types->length(); i++) {
DOMMimeType* mime_type = mime_types->item(i);
builder.AddToken(IdentifiabilityBenignStringToken(mime_type->type()));
builder.AddToken(
IdentifiabilityBenignStringToken(mime_type->description()));
builder.AddToken(IdentifiabilityBenignStringToken(mime_type->suffixes()));
DOMPlugin* plugin = mime_type->enabledPlugin();
if (plugin) {
builder.AddToken(IdentifiabilityBenignStringToken(plugin->name()));
builder.AddToken(IdentifiabilityBenignStringToken(plugin->filename()));
builder.AddToken(IdentifiabilityBenignStringToken(plugin->description()));
}
}
IdentifiabilityMetricBuilder(window->UkmSourceID())
.Add(surface, builder.GetToken())
.Record(window->UkmRecorder());
}
} // namespace
DOMPluginArray* NavigatorPlugins::plugins(LocalDOMWindow* window) const {
if (!plugins_) {
plugins_ = MakeGarbageCollected<DOMPluginArray>(
window, should_return_fixed_plugin_data_);
}
DOMPluginArray* result = plugins_.Get();
RecordPlugins(window, result);
return result;
}
DOMMimeTypeArray* NavigatorPlugins::mimeTypes(LocalDOMWindow* window) const {
if (!mime_types_) {
mime_types_ = MakeGarbageCollected<DOMMimeTypeArray>(
window, should_return_fixed_plugin_data_);
RecordMimeTypes(window, mime_types_.Get());
}
return mime_types_.Get();
}
bool NavigatorPlugins::pdfViewerEnabled(LocalDOMWindow* window) const {
return plugins(window)->IsPdfViewerAvailable();
}
void NavigatorPlugins::Trace(Visitor* visitor) const {
visitor->Trace(plugins_);
visitor->Trace(mime_types_);
Supplement<Navigator>::Trace(visitor);
}
} // namespace blink
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