cobalt/worker/service_worker_global_scope.cc - cobalt - Git at Google

 // Copyright 2022 The Cobalt Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "cobalt/worker/service_worker_global_scope.h"

 #include <memory>
 #include <utility>

 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/trace_event/trace_event.h"
 #include "cobalt/script/environment_settings.h"
 #include "cobalt/script/exception_state.h"
 #include "cobalt/script/v8c/entry_scope.h"
 #include "cobalt/web/environment_settings_helper.h"
 #include "cobalt/worker/clients.h"
 #include "cobalt/worker/fetch_event.h"
 #include "cobalt/worker/fetch_event_init.h"
 #include "cobalt/worker/service_worker_jobs.h"
 #include "cobalt/worker/worker_settings.h"

 namespace cobalt {
 namespace worker {
 ServiceWorkerGlobalScope::ServiceWorkerGlobalScope(
     script::EnvironmentSettings* settings, ServiceWorkerObject* service_worker)
     : WorkerGlobalScope(settings),
       clients_(new Clients(settings)),
       service_worker_object_(base::AsWeakPtr(service_worker)) {
   loader::FetchInterceptorCoordinator::GetInstance()->Add(this);
 }

 ServiceWorkerGlobalScope::~ServiceWorkerGlobalScope() {
   loader::FetchInterceptorCoordinator::GetInstance()->Clear();
 }

 void ServiceWorkerGlobalScope::Initialize() {}

 void ServiceWorkerGlobalScope::ImportScripts(
     const std::vector<std::string>& urls,
     script::ExceptionState* exception_state) {
   // Algorithm for importScripts():
   //   https://www.w3.org/TR/2022/CRD-service-workers-20220712/#importscripts

   // When the importScripts(urls) method is called, the user agent must import
   // scripts into worker global scope, with the following steps to perform the
   // fetch given the request request:
   // 1. Let serviceWorker be request’s client's global object's service
   //    worker.
   DCHECK(service_worker_object_);

   WorkerGlobalScope::ImportScriptsInternal(
       urls, exception_state,
       base::Bind(
           [](ServiceWorkerObject* service_worker, const GURL& url,
              script::ExceptionState* exception_state) -> std::string* {
             // 2. Let map be serviceWorker’s script resource map.
             DCHECK(service_worker);
             // 3. Let url be request’s url.
             DCHECK(url.is_valid());
             const ScriptResource* script_resource =
                 service_worker->LookupScriptResource(url);
             std::string* resource_content =
                 script_resource ? script_resource->content.get() : nullptr;
             // 4. If serviceWorker’s state is not "parsed" or "installing":
             if (service_worker->state() != kServiceWorkerStateParsed &&
                 service_worker->state() != kServiceWorkerStateInstalling) {
               // 4.1. Return map[url] if it exists and a network error
               // otherwise.
               if (!resource_content) {
                 web::DOMException::Raise(web::DOMException::kNetworkErr,
                                          exception_state);
               }
               return resource_content;
             }

             // 5. If map[url] exists:
             if (resource_content) {
               // 5.1. Append url to serviceWorker’s set of used scripts.
               service_worker->AppendToSetOfUsedScripts(url);

               // 5.2. Return map[url].
               return resource_content;
             }

             // 6. Let registration be serviceWorker’s containing service worker
             //    registration.
             // 7. Set request’s service-workers mode to "none".
             // 8. Set request’s cache mode to "no-cache" if any of the following
             //    are true:
             //    . registration’s update via cache mode is "none".
             //    . The current global object's force bypass cache for import
             //      scripts flag is set.
             //    . registration is stale.
             // 9. Let response be the result of fetching request.
             // TODO(b/228908203): Set request headers. This should probably be
             // a separate callback that gets passed to the ScriptLoader for the
             // FetcherFactory.

             return resource_content;
           },
           service_worker_object_),
       base::Bind(
           [](ServiceWorkerObject* service_worker, const GURL& url,
              std::string* content) {
             // 10. If response’s cache state is not "local", set registration’s
             //     last update check time to the current time.
             // 11. If response’s unsafe response is a bad import script
             //     response, then return a network error.

             // 12. Set map[url] to response.
             service_worker->SetScriptResource(url, content);
             // 13. Append url to serviceWorker’s set of used scripts.
             service_worker->AppendToSetOfUsedScripts(url);
             // 14. Set serviceWorker’s classic scripts imported flag.
             service_worker->set_classic_scripts_imported();
             // 15. Return response.
             return content;
           },
           service_worker_object_));
 }

 scoped_refptr<ServiceWorkerRegistration>
 ServiceWorkerGlobalScope::registration() const {
   // Algorithm for registration():
   //   https://www.w3.org/TR/2022/CRD-service-workers-20220712/#service-worker-global-scope-registration

   // The registration getter steps are to return the result of getting the
   // service worker registration object representing this's service worker's
   // containing service worker registration in this's relevant settings object.
   DCHECK(service_worker_object_);
   return environment_settings()->context()->GetServiceWorkerRegistration(
       service_worker_object_
           ? service_worker_object_->containing_service_worker_registration()
           : nullptr);
 }

 scoped_refptr<ServiceWorker> ServiceWorkerGlobalScope::service_worker() const {
   // Algorithm for service_worker():
   //   https://www.w3.org/TR/2022/CRD-service-workers-20220712/#service-worker-global-scope-serviceworker

   // The serviceWorker getter steps are to return the result of getting the
   // service worker object that represents this's service worker in this's
   // relevant settings object.
   DCHECK(service_worker_object_);
   return environment_settings()->context()->GetServiceWorker(
       service_worker_object_);
 }


 script::HandlePromiseVoid ServiceWorkerGlobalScope::SkipWaiting() {
   TRACE_EVENT0("cobalt::worker", "ServiceWorkerGlobalScope::SkipWaiting()");
   DCHECK_EQ(base::MessageLoop::current(),
             environment_settings()->context()->message_loop());
   // Algorithm for skipWaiting():
   //   https://www.w3.org/TR/2022/CRD-service-workers-20220712/#dom-serviceworkerglobalscope-skipwaiting
   // 1. Let promise be a new promise.
   auto promise = environment_settings()
                      ->context()
                      ->global_environment()
                      ->script_value_factory()
                      ->CreateBasicPromise<void>();
   std::unique_ptr<script::ValuePromiseVoid::Reference> promise_reference(
       new script::ValuePromiseVoid::Reference(this, promise));

   // 2. Run the following substeps in parallel:
   worker::ServiceWorkerJobs* jobs =
       environment_settings()->context()->service_worker_jobs();
   jobs->message_loop()->task_runner()->PostTask(
       FROM_HERE,
       base::BindOnce(&ServiceWorkerJobs::SkipWaitingSubSteps,
                      base::Unretained(jobs),
                      base::Unretained(environment_settings()->context()),
                      base::Unretained(service_worker_object_.get()),
                      std::move(promise_reference)));
   // 3. Return promise.
   return promise;
 }

 void ServiceWorkerGlobalScope::StartFetch(
     const GURL& url,
     base::OnceCallback<void(std::unique_ptr<std::string>)> callback,
     base::OnceCallback<void(const net::LoadTimingInfo&)>
         report_load_timing_info,
     base::OnceClosure fallback) {
   if (base::MessageLoop::current() !=
       environment_settings()->context()->message_loop()) {
     environment_settings()->context()->message_loop()->task_runner()->PostTask(
         FROM_HERE,
         base::BindOnce(&ServiceWorkerGlobalScope::StartFetch,
                        base::Unretained(this), url, std::move(callback),
                        std::move(report_load_timing_info),
                        std::move(fallback)));
     return;
   }
   if (!service_worker()) {
     std::move(fallback).Run();
     return;
   }
   // TODO: handle the following steps in
   //       https://www.w3.org/TR/2022/CRD-service-workers-20220712/#handle-fetch.
   // 22. If activeWorker’s state is "activating", wait for activeWorker’s state
   //     to become "activated".
   // 23. If the result of running the Run Service Worker algorithm with
   //     activeWorker is failure, then set handleFetchFailed to true.

   auto* global_environment = get_global_environment(environment_settings());
   auto* isolate = global_environment->isolate();
   script::v8c::EntryScope entry_scope(isolate);
   auto request = web::cache_utils::CreateRequest(isolate, url.spec());
   if (!request) {
     std::move(fallback).Run();
     return;
   }

   FetchEventInit event_init;
   event_init.set_request(
       web::cache_utils::FromV8Value(isolate, request.value()).GetScriptValue());
   scoped_refptr<FetchEvent> fetch_event =
       new FetchEvent(environment_settings(), base::Tokens::fetch(), event_init,
                      std::move(callback), std::move(report_load_timing_info));
   // 24. Create and dispatch event.
   DispatchEvent(fetch_event);
   // TODO: implement steps 25 and 26.
   if (!fetch_event->respond_with_called()) {
     std::move(fallback).Run();
   }
 }

 }  // namespace worker
 }  // namespace cobalt
	// Copyright 2022 The Cobalt Authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "cobalt/worker/service_worker_global_scope.h"

	#include <memory>
	#include <utility>

	#include "base/bind.h"
	#include "base/logging.h"
	#include "base/message_loop/message_loop.h"
	#include "base/single_thread_task_runner.h"
	#include "base/trace_event/trace_event.h"
	#include "cobalt/script/environment_settings.h"
	#include "cobalt/script/exception_state.h"
	#include "cobalt/script/v8c/entry_scope.h"
	#include "cobalt/web/environment_settings_helper.h"
	#include "cobalt/worker/clients.h"
	#include "cobalt/worker/fetch_event.h"
	#include "cobalt/worker/fetch_event_init.h"
	#include "cobalt/worker/service_worker_jobs.h"
	#include "cobalt/worker/worker_settings.h"

	namespace cobalt {
	namespace worker {
	ServiceWorkerGlobalScope::ServiceWorkerGlobalScope(
	script::EnvironmentSettings* settings, ServiceWorkerObject* service_worker)
	: WorkerGlobalScope(settings),
	clients_(new Clients(settings)),
	service_worker_object_(base::AsWeakPtr(service_worker)) {
	loader::FetchInterceptorCoordinator::GetInstance()->Add(this);
	}

	ServiceWorkerGlobalScope::~ServiceWorkerGlobalScope() {
	loader::FetchInterceptorCoordinator::GetInstance()->Clear();
	}

	void ServiceWorkerGlobalScope::Initialize() {}

	void ServiceWorkerGlobalScope::ImportScripts(
	const std::vector<std::string>& urls,
	script::ExceptionState* exception_state) {
	// Algorithm for importScripts():
	// https://www.w3.org/TR/2022/CRD-service-workers-20220712/#importscripts

	// When the importScripts(urls) method is called, the user agent must import
	// scripts into worker global scope, with the following steps to perform the
	// fetch given the request request:
	// 1. Let serviceWorker be request’s client's global object's service
	// worker.
	DCHECK(service_worker_object_);

	WorkerGlobalScope::ImportScriptsInternal(
	urls, exception_state,
	base::Bind(
	[](ServiceWorkerObject* service_worker, const GURL& url,
	script::ExceptionState* exception_state) -> std::string* {
	// 2. Let map be serviceWorker’s script resource map.
	DCHECK(service_worker);
	// 3. Let url be request’s url.
	DCHECK(url.is_valid());
	const ScriptResource* script_resource =
	service_worker->LookupScriptResource(url);
	std::string* resource_content =
	script_resource ? script_resource->content.get() : nullptr;
	// 4. If serviceWorker’s state is not "parsed" or "installing":
	if (service_worker->state() != kServiceWorkerStateParsed &&
	service_worker->state() != kServiceWorkerStateInstalling) {
	// 4.1. Return map[url] if it exists and a network error
	// otherwise.
	if (!resource_content) {
	web::DOMException::Raise(web::DOMException::kNetworkErr,
	exception_state);
	}
	return resource_content;
	}

	// 5. If map[url] exists:
	if (resource_content) {
	// 5.1. Append url to serviceWorker’s set of used scripts.
	service_worker->AppendToSetOfUsedScripts(url);

	// 5.2. Return map[url].
	return resource_content;
	}

	// 6. Let registration be serviceWorker’s containing service worker
	// registration.
	// 7. Set request’s service-workers mode to "none".
	// 8. Set request’s cache mode to "no-cache" if any of the following
	// are true:
	// . registration’s update via cache mode is "none".
	// . The current global object's force bypass cache for import
	// scripts flag is set.
	// . registration is stale.
	// 9. Let response be the result of fetching request.
	// TODO(b/228908203): Set request headers. This should probably be
	// a separate callback that gets passed to the ScriptLoader for the
	// FetcherFactory.

	return resource_content;
	},
	service_worker_object_),
	base::Bind(
	[](ServiceWorkerObject* service_worker, const GURL& url,
	std::string* content) {
	// 10. If response’s cache state is not "local", set registration’s
	// last update check time to the current time.
	// 11. If response’s unsafe response is a bad import script
	// response, then return a network error.

	// 12. Set map[url] to response.
	service_worker->SetScriptResource(url, content);
	// 13. Append url to serviceWorker’s set of used scripts.
	service_worker->AppendToSetOfUsedScripts(url);
	// 14. Set serviceWorker’s classic scripts imported flag.
	service_worker->set_classic_scripts_imported();
	// 15. Return response.
	return content;
	},
	service_worker_object_));
	}

	scoped_refptr<ServiceWorkerRegistration>
	ServiceWorkerGlobalScope::registration() const {
	// Algorithm for registration():
	// https://www.w3.org/TR/2022/CRD-service-workers-20220712/#service-worker-global-scope-registration

	// The registration getter steps are to return the result of getting the
	// service worker registration object representing this's service worker's
	// containing service worker registration in this's relevant settings object.
	DCHECK(service_worker_object_);
	return environment_settings()->context()->GetServiceWorkerRegistration(
	service_worker_object_
	? service_worker_object_->containing_service_worker_registration()
	: nullptr);
	}

	scoped_refptr<ServiceWorker> ServiceWorkerGlobalScope::service_worker() const {
	// Algorithm for service_worker():
	// https://www.w3.org/TR/2022/CRD-service-workers-20220712/#service-worker-global-scope-serviceworker

	// The serviceWorker getter steps are to return the result of getting the
	// service worker object that represents this's service worker in this's
	// relevant settings object.
	DCHECK(service_worker_object_);
	return environment_settings()->context()->GetServiceWorker(
	service_worker_object_);
	}


	script::HandlePromiseVoid ServiceWorkerGlobalScope::SkipWaiting() {
	TRACE_EVENT0("cobalt::worker", "ServiceWorkerGlobalScope::SkipWaiting()");
	DCHECK_EQ(base::MessageLoop::current(),
	environment_settings()->context()->message_loop());
	// Algorithm for skipWaiting():
	// https://www.w3.org/TR/2022/CRD-service-workers-20220712/#dom-serviceworkerglobalscope-skipwaiting
	// 1. Let promise be a new promise.
	auto promise = environment_settings()
	->context()
	->global_environment()
	->script_value_factory()
	->CreateBasicPromise<void>();
	std::unique_ptr<script::ValuePromiseVoid::Reference> promise_reference(
	new script::ValuePromiseVoid::Reference(this, promise));

	// 2. Run the following substeps in parallel:
	worker::ServiceWorkerJobs* jobs =
	environment_settings()->context()->service_worker_jobs();
	jobs->message_loop()->task_runner()->PostTask(
	FROM_HERE,
	base::BindOnce(&ServiceWorkerJobs::SkipWaitingSubSteps,
	base::Unretained(jobs),
	base::Unretained(environment_settings()->context()),
	base::Unretained(service_worker_object_.get()),
	std::move(promise_reference)));
	// 3. Return promise.
	return promise;
	}

	void ServiceWorkerGlobalScope::StartFetch(
	const GURL& url,
	base::OnceCallback<void(std::unique_ptr<std::string>)> callback,
	base::OnceCallback<void(const net::LoadTimingInfo&)>
	report_load_timing_info,
	base::OnceClosure fallback) {
	if (base::MessageLoop::current() !=
	environment_settings()->context()->message_loop()) {
	environment_settings()->context()->message_loop()->task_runner()->PostTask(
	FROM_HERE,
	base::BindOnce(&ServiceWorkerGlobalScope::StartFetch,
	base::Unretained(this), url, std::move(callback),
	std::move(report_load_timing_info),
	std::move(fallback)));
	return;
	}
	if (!service_worker()) {
	std::move(fallback).Run();
	return;
	}
	// TODO: handle the following steps in
	// https://www.w3.org/TR/2022/CRD-service-workers-20220712/#handle-fetch.
	// 22. If activeWorker’s state is "activating", wait for activeWorker’s state
	// to become "activated".
	// 23. If the result of running the Run Service Worker algorithm with
	// activeWorker is failure, then set handleFetchFailed to true.

	auto* global_environment = get_global_environment(environment_settings());
	auto* isolate = global_environment->isolate();
	script::v8c::EntryScope entry_scope(isolate);
	auto request = web::cache_utils::CreateRequest(isolate, url.spec());
	if (!request) {
	std::move(fallback).Run();
	return;
	}

	FetchEventInit event_init;
	event_init.set_request(
	web::cache_utils::FromV8Value(isolate, request.value()).GetScriptValue());
	scoped_refptr<FetchEvent> fetch_event =
	new FetchEvent(environment_settings(), base::Tokens::fetch(), event_init,
	std::move(callback), std::move(report_load_timing_info));
	// 24. Create and dispatch event.
	DispatchEvent(fetch_event);
	// TODO: implement steps 25 and 26.
	if (!fetch_event->respond_with_called()) {
	std::move(fallback).Run();
	}
	}

	} // namespace worker
	} // namespace cobalt