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// Copyright 2014 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 "modules/serviceworkers/NavigatorServiceWorker.h"
#include "core/dom/Document.h"
#include "core/dom/ExecutionContext.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Navigator.h"
#include "core/frame/UseCounter.h"
#include "modules/serviceworkers/ServiceWorkerContainer.h"
#include "platform/bindings/ScriptState.h"
namespace blink {
NavigatorServiceWorker::NavigatorServiceWorker(Navigator& navigator) {}
NavigatorServiceWorker* NavigatorServiceWorker::From(Document& document) {
if (!document.GetFrame() || !document.GetFrame()->DomWindow())
return nullptr;
Navigator& navigator = *document.GetFrame()->DomWindow()->navigator();
return &From(navigator);
}
NavigatorServiceWorker& NavigatorServiceWorker::From(Navigator& navigator) {
NavigatorServiceWorker* supplement = ToNavigatorServiceWorker(navigator);
if (!supplement) {
supplement = new NavigatorServiceWorker(navigator);
ProvideTo(navigator, SupplementName(), supplement);
}
if (navigator.GetFrame() && navigator.GetFrame()
->GetSecurityContext()
->GetSecurityOrigin()
->CanAccessServiceWorkers()) {
// Ensure ServiceWorkerContainer. It can be cleared regardless of
// |supplement|. See comments in NavigatorServiceWorker::serviceWorker() for
// details.
supplement->serviceWorker(navigator.GetFrame(), ASSERT_NO_EXCEPTION);
}
return *supplement;
}
NavigatorServiceWorker* NavigatorServiceWorker::ToNavigatorServiceWorker(
Navigator& navigator) {
return static_cast<NavigatorServiceWorker*>(
Supplement<Navigator>::From(navigator, SupplementName()));
}
const char* NavigatorServiceWorker::SupplementName() {
return "NavigatorServiceWorker";
}
ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(
ScriptState* script_state,
Navigator& navigator,
ExceptionState& exception_state) {
ExecutionContext* execution_context = ExecutionContext::From(script_state);
DCHECK(!navigator.GetFrame() ||
execution_context->GetSecurityOrigin()->CanAccess(
navigator.GetFrame()->GetSecurityContext()->GetSecurityOrigin()));
return NavigatorServiceWorker::From(navigator).serviceWorker(
navigator.GetFrame(), exception_state);
}
ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(
ScriptState* script_state,
Navigator& navigator,
String& error_message) {
ExecutionContext* execution_context = ExecutionContext::From(script_state);
DCHECK(!navigator.GetFrame() ||
execution_context->GetSecurityOrigin()->CanAccess(
navigator.GetFrame()->GetSecurityContext()->GetSecurityOrigin()));
return NavigatorServiceWorker::From(navigator).serviceWorker(
navigator.GetFrame(), error_message);
}
ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(
LocalFrame* frame,
ExceptionState& exception_state) {
String error_message;
ServiceWorkerContainer* result = serviceWorker(frame, error_message);
if (!error_message.IsEmpty()) {
DCHECK(!result);
exception_state.ThrowSecurityError(error_message);
}
return result;
}
ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(
LocalFrame* frame,
String& error_message) {
if (frame && !frame->GetSecurityContext()
->GetSecurityOrigin()
->CanAccessServiceWorkers()) {
if (frame->GetSecurityContext()->IsSandboxed(kSandboxOrigin)) {
error_message =
"Service worker is disabled because the context is sandboxed and "
"lacks the 'allow-same-origin' flag.";
} else if (frame->GetSecurityContext()
->GetSecurityOrigin()
->HasSuborigin()) {
error_message =
"Service worker is disabled because the context is in a suborigin.";
} else {
error_message =
"Access to service workers is denied in this document origin.";
}
return nullptr;
} else if (frame &&
frame->GetSecurityContext()->GetSecurityOrigin()->IsLocal()) {
UseCounter::Count(frame, WebFeature::kFileAccessedServiceWorker);
}
if (!service_worker_ && frame) {
// We need to create a new ServiceWorkerContainer when the frame
// navigates to a new document. In practice, this happens only when the
// frame navigates from the initial empty page to a new same-origin page.
DCHECK(frame->DomWindow());
service_worker_ = ServiceWorkerContainer::Create(
frame->DomWindow()->GetExecutionContext(), this);
}
return service_worker_.Get();
}
void NavigatorServiceWorker::ClearServiceWorker() {
service_worker_ = nullptr;
}
void NavigatorServiceWorker::Trace(blink::Visitor* visitor) {
visitor->Trace(service_worker_);
Supplement<Navigator>::Trace(visitor);
}
} // namespace blink
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