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/*
* Copyright (C) 2017-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "FetchEvent.h"
#include "CachedResourceRequestInitiatorTypes.h"
#include "DOMPromiseProxy.h"
#include "EventNames.h"
#include "FetchRequest.h"
#include "JSDOMPromise.h"
#include "JSFetchResponse.h"
#include "Logging.h"
#include <wtf/IsoMallocInlines.h>
#if ENABLE(SERVICE_WORKER)
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(FetchEvent);
Ref<FetchEvent> FetchEvent::createForTesting(ScriptExecutionContext& context)
{
FetchEvent::Init init;
init.request = FetchRequest::create(context, { }, FetchHeaders::create(FetchHeaders::Guard::Immutable, { }), { }, { }, { });
return FetchEvent::create(*context.globalObject(), eventNames().fetchEvent, WTFMove(init), Event::IsTrusted::Yes);
}
static inline Ref<DOMPromise> retrieveHandledPromise(JSC::JSGlobalObject& globalObject, RefPtr<DOMPromise>&& promise)
{
if (promise)
return promise.releaseNonNull();
JSC::JSLockHolder lock(globalObject.vm());
auto& jsDOMGlobalObject = *JSC::jsCast<JSDOMGlobalObject*>(&globalObject);
auto deferredPromise = DeferredPromise::create(jsDOMGlobalObject);
return DOMPromise::create(jsDOMGlobalObject, *JSC::jsCast<JSC::JSPromise*>(deferredPromise->promise()));
}
FetchEvent::FetchEvent(JSC::JSGlobalObject& globalObject, const AtomString& type, Init&& initializer, IsTrusted isTrusted)
: ExtendableEvent(type, initializer, isTrusted)
, m_request(initializer.request.releaseNonNull())
, m_clientId(WTFMove(initializer.clientId))
, m_resultingClientId(WTFMove(initializer.resultingClientId))
, m_handled(retrieveHandledPromise(globalObject, WTFMove(initializer.handled)))
{
}
FetchEvent::~FetchEvent()
{
if (auto callback = WTFMove(m_onResponse)) {
RELEASE_LOG_ERROR_IF(m_respondWithEntered, ServiceWorker, "Fetch event is destroyed without a response, respondWithEntered=%d, waitToRespond=%d, respondWithError=%d, respondPromise=%d", m_respondWithEntered, m_waitToRespond, m_respondWithError, !!m_respondPromise);
callback(makeUnexpected(std::optional<ResourceError> { }));
}
}
ResourceError FetchEvent::createResponseError(const URL& url, const String& errorMessage, ResourceError::IsSanitized isSanitized)
{
return ResourceError { errorDomainWebKitServiceWorker, 0, url, makeString("FetchEvent.respondWith received an error: ", errorMessage), ResourceError::Type::General, isSanitized };
}
ExceptionOr<void> FetchEvent::respondWith(Ref<DOMPromise>&& promise)
{
if (!isBeingDispatched())
return Exception { InvalidStateError, "Event is not being dispatched"_s };
if (m_respondWithEntered)
return Exception { InvalidStateError, "Event respondWith flag is set"_s };
m_respondPromise = WTFMove(promise);
addExtendLifetimePromise(*m_respondPromise);
auto isRegistered = m_respondPromise->whenSettled([this, protectedThis = Ref { *this }] {
promiseIsSettled();
});
stopPropagation();
stopImmediatePropagation();
m_respondWithEntered = true;
m_waitToRespond = true;
if (isRegistered == DOMPromise::IsCallbackRegistered::No)
respondWithError(createResponseError(m_request->url(), "FetchEvent unable to handle respondWith promise."_s, ResourceError::IsSanitized::Yes));
return { };
}
void FetchEvent::onResponse(ResponseCallback&& callback)
{
ASSERT(!m_onResponse);
m_onResponse = WTFMove(callback);
}
void FetchEvent::respondWithError(ResourceError&& error)
{
m_respondWithError = true;
processResponse(makeUnexpected(WTFMove(error)));
}
void FetchEvent::processResponse(Expected<Ref<FetchResponse>, std::optional<ResourceError>>&& result)
{
m_respondPromise = nullptr;
m_waitToRespond = false;
if (auto callback = WTFMove(m_onResponse))
callback(WTFMove(result));
}
void FetchEvent::promiseIsSettled()
{
if (m_respondPromise->status() == DOMPromise::Status::Rejected) {
auto reason = m_respondPromise->result().toWTFString(m_respondPromise->globalObject());
respondWithError(createResponseError(m_request->url(), reason, ResourceError::IsSanitized::Yes));
return;
}
ASSERT(m_respondPromise->status() == DOMPromise::Status::Fulfilled);
auto response = JSFetchResponse::toWrapped(m_respondPromise->globalObject()->vm(), m_respondPromise->result());
if (!response) {
respondWithError(createResponseError(m_request->url(), "Returned response is null."_s, ResourceError::IsSanitized::Yes));
return;
}
if (response->isDisturbedOrLocked()) {
respondWithError(createResponseError(m_request->url(), "Response is disturbed or locked."_s, ResourceError::IsSanitized::Yes));
return;
}
processResponse(Ref { *response });
}
FetchEvent::PreloadResponsePromise& FetchEvent::preloadResponse(ScriptExecutionContext& context)
{
if (!m_preloadResponsePromise) {
m_preloadResponsePromise = makeUnique<PreloadResponsePromise>();
if (!m_navigationPreloadIdentifier) {
auto* globalObject = context.globalObject();
if (globalObject) {
JSC::Strong<JSC::Unknown> value { globalObject->vm(), JSC::jsUndefined() };
m_preloadResponsePromise->resolve(value);
}
return *m_preloadResponsePromise;
}
}
return *m_preloadResponsePromise;
}
void FetchEvent::navigationPreloadIsReady(ResourceResponse&& response)
{
auto* globalObject = m_handled->globalObject();
auto* context = globalObject ? globalObject->scriptExecutionContext() : nullptr;
if (!context)
return;
if (!m_preloadResponsePromise)
m_preloadResponsePromise = makeUnique<PreloadResponsePromise>();
auto request = FetchRequest::create(*context, { }, FetchHeaders::create(), ResourceRequest { m_request->internalRequest() } , FetchOptions { m_request->fetchOptions() }, String { m_request->internalRequestReferrer() });
request->setNavigationPreloadIdentifier(m_navigationPreloadIdentifier);
auto fetchResponse = FetchResponse::createFetchResponse(*context, request.get(), { });
fetchResponse->setReceivedInternalResponse(response, FetchOptions::Credentials::Include);
fetchResponse->setIsNavigationPreload(true);
auto& vm = globalObject->vm();
JSC::JSLockHolder lock(vm);
JSC::Strong<JSC::Unknown> value { vm, toJS(globalObject, JSC::jsCast<JSDOMGlobalObject*>(globalObject), fetchResponse.get()) };
m_preloadResponsePromise->resolve(value);
// We postpone the load to leave some time for the service worker to use the preload before loading it.
context->postTask([fetchResponse = WTFMove(fetchResponse), request = WTFMove(request)](auto& context) {
if (!fetchResponse->isUsedForPreload())
fetchResponse->startLoader(context, request.get(), cachedResourceRequestInitiatorTypes().navigation);
});
}
void FetchEvent::navigationPreloadFailed(ResourceError&& error)
{
if (!m_preloadResponsePromise)
m_preloadResponsePromise = makeUnique<PreloadResponsePromise>();
m_preloadResponsePromise->reject(Exception { TypeError, error.sanitizedDescription() });
}
} // namespace WebCore
#endif // ENABLE(SERVICE_WORKER)
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