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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.
#include "extensions/renderer/content_setting.h"
#include "base/containers/contains.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "extensions/renderer/bindings/api_binding_types.h"
#include "extensions/renderer/bindings/api_binding_util.h"
#include "extensions/renderer/bindings/api_invocation_errors.h"
#include "extensions/renderer/bindings/api_request_handler.h"
#include "extensions/renderer/bindings/api_signature.h"
#include "extensions/renderer/bindings/api_type_reference_map.h"
#include "extensions/renderer/bindings/binding_access_checker.h"
#include "extensions/renderer/bindings/js_runner.h"
#include "extensions/renderer/console.h"
#include "extensions/renderer/script_context_set.h"
#include "gin/arguments.h"
#include "gin/converter.h"
#include "gin/handle.h"
#include "gin/object_template_builder.h"
#include "third_party/blink/public/mojom/devtools/console_message.mojom.h"
namespace extensions {
namespace {
// Content settings that are deprecated.
const char* const kDeprecatedTypesToAllow[] = {
"fullscreen",
"mouselock",
};
const char* const kDeprecatedTypesToBlock[] = {
"plugins",
};
const char* GetForcedValueForDeprecatedSetting(base::StringPiece type) {
if (base::Contains(kDeprecatedTypesToAllow, type))
return "allow";
DCHECK(base::Contains(kDeprecatedTypesToBlock, type));
return "block";
}
bool IsDeprecated(base::StringPiece type) {
return base::Contains(kDeprecatedTypesToAllow, type) ||
base::Contains(kDeprecatedTypesToBlock, type);
}
} // namespace
v8::Local<v8::Object> ContentSetting::Create(
v8::Isolate* isolate,
const std::string& property_name,
const base::ListValue* property_values,
APIRequestHandler* request_handler,
APIEventHandler* event_handler,
APITypeReferenceMap* type_refs,
const BindingAccessChecker* access_checker) {
std::string pref_name;
CHECK(property_values->GetString(0u, &pref_name));
const base::DictionaryValue* value_spec = nullptr;
CHECK(property_values->GetDictionary(1u, &value_spec));
gin::Handle<ContentSetting> handle = gin::CreateHandle(
isolate, new ContentSetting(request_handler, type_refs, access_checker,
pref_name, *value_spec));
return handle.ToV8().As<v8::Object>();
}
ContentSetting::ContentSetting(APIRequestHandler* request_handler,
const APITypeReferenceMap* type_refs,
const BindingAccessChecker* access_checker,
const std::string& pref_name,
const base::DictionaryValue& set_value_spec)
: request_handler_(request_handler),
type_refs_(type_refs),
access_checker_(access_checker),
pref_name_(pref_name),
argument_spec_(ArgumentType::OBJECT) {
// The set() call takes an object { setting: { type: <t> }, ... }, where <t>
// is the custom set() argument specified above by value_spec.
ArgumentSpec::PropertiesMap properties;
properties["primaryPattern"] =
std::make_unique<ArgumentSpec>(ArgumentType::STRING);
{
auto secondary_pattern_spec =
std::make_unique<ArgumentSpec>(ArgumentType::STRING);
secondary_pattern_spec->set_optional(true);
properties["secondaryPattern"] = std::move(secondary_pattern_spec);
}
{
auto resource_identifier_spec =
std::make_unique<ArgumentSpec>(ArgumentType::REF);
resource_identifier_spec->set_ref("contentSettings.ResourceIdentifier");
resource_identifier_spec->set_optional(true);
properties["resourceIdentifier"] = std::move(resource_identifier_spec);
}
{
auto scope_spec = std::make_unique<ArgumentSpec>(ArgumentType::REF);
scope_spec->set_ref("contentSettings.Scope");
scope_spec->set_optional(true);
properties["scope"] = std::move(scope_spec);
}
properties["setting"] = std::make_unique<ArgumentSpec>(set_value_spec);
argument_spec_.set_properties(std::move(properties));
}
ContentSetting::~ContentSetting() = default;
gin::WrapperInfo ContentSetting::kWrapperInfo = {gin::kEmbedderNativeGin};
gin::ObjectTemplateBuilder ContentSetting::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return Wrappable<ContentSetting>::GetObjectTemplateBuilder(isolate)
.SetMethod("get", &ContentSetting::Get)
.SetMethod("set", &ContentSetting::Set)
.SetMethod("clear", &ContentSetting::Clear)
.SetMethod("getResourceIdentifiers",
&ContentSetting::GetResourceIdentifiers);
}
const char* ContentSetting::GetTypeName() {
return "ContentSetting";
}
void ContentSetting::Get(gin::Arguments* arguments) {
HandleFunction("get", arguments);
}
void ContentSetting::Set(gin::Arguments* arguments) {
HandleFunction("set", arguments);
}
void ContentSetting::Clear(gin::Arguments* arguments) {
HandleFunction("clear", arguments);
}
void ContentSetting::GetResourceIdentifiers(gin::Arguments* arguments) {
HandleFunction("getResourceIdentifiers", arguments);
}
void ContentSetting::HandleFunction(const std::string& method_name,
gin::Arguments* arguments) {
v8::Isolate* isolate = arguments->isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = arguments->GetHolderCreationContext();
if (!binding::IsContextValidOrThrowError(context))
return;
std::vector<v8::Local<v8::Value>> argument_list = arguments->GetAll();
std::string full_name = "contentSettings.ContentSetting." + method_name;
if (!access_checker_->HasAccessOrThrowError(context, full_name))
return;
const APISignature* signature = type_refs_->GetTypeMethodSignature(full_name);
APISignature::JSONParseResult parse_result =
signature->ParseArgumentsToJSON(context, argument_list, *type_refs_);
if (!parse_result.succeeded()) {
arguments->ThrowTypeError(api_errors::InvocationError(
full_name, signature->GetExpectedSignature(), *parse_result.error));
return;
}
if (IsDeprecated(pref_name_)) {
console::AddMessage(ScriptContextSet::GetContextByV8Context(context),
blink::mojom::ConsoleMessageLevel::kWarning,
base::StringPrintf("contentSettings.%s is deprecated.",
pref_name_.c_str()));
// If a callback was provided, call it immediately.
if (!parse_result.callback.IsEmpty()) {
std::vector<v8::Local<v8::Value>> args;
if (method_name == "get") {
// Populate the result to avoid breaking extensions.
v8::Local<v8::Object> object = v8::Object::New(isolate);
v8::Maybe<bool> result = object->CreateDataProperty(
context, gin::StringToSymbol(isolate, "setting"),
gin::StringToSymbol(
isolate, GetForcedValueForDeprecatedSetting(pref_name_)));
// Since we just defined this object, CreateDataProperty() should never
// fail.
CHECK(result.ToChecked());
args.push_back(object);
}
JSRunner::Get(context)->RunJSFunction(parse_result.callback, context,
args.size(), args.data());
}
return;
}
if (method_name == "set") {
v8::Local<v8::Value> value = argument_list[0];
// The set schema included in the Schema object is generic, since it varies
// per-setting. However, this is only ever for a single setting, so we can
// enforce the types more thoroughly.
// Note: we do this *after* checking if the setting is deprecated, since
// this validation will fail for deprecated settings.
std::string error;
if (!value.IsEmpty() &&
!argument_spec_.ParseArgument(context, value, *type_refs_, nullptr,
nullptr, &error)) {
arguments->ThrowTypeError("Invalid invocation: " + error);
return;
}
}
parse_result.arguments_list->Insert(
parse_result.arguments_list->GetList().begin(), base::Value(pref_name_));
request_handler_->StartRequest(context, "contentSettings." + method_name,
std::move(parse_result.arguments_list),
parse_result.callback,
v8::Local<v8::Function>());
}
} // namespace extensions
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