ServiceWorkerFetch.cpp [plain text]
#include "config.h"
#include "ServiceWorkerFetch.h"
#if ENABLE(SERVICE_WORKER)
#include "CrossOriginAccessControl.h"
#include "EventNames.h"
#include "FetchEvent.h"
#include "FetchRequest.h"
#include "FetchResponse.h"
#include "ReadableStreamChunk.h"
#include "ResourceRequest.h"
#include "ServiceWorker.h"
#include "ServiceWorkerClientIdentifier.h"
#include "WorkerGlobalScope.h"
namespace WebCore {
namespace ServiceWorkerFetch {
static void processResponse(Ref<Client>&& client, Expected<Ref<FetchResponse>, ResourceError>&& result)
{
if (!result.has_value()) {
client->didFail(result.error());
return;
}
auto response = WTFMove(result.value());
client->didReceiveResponse(response->resourceResponse());
if (response->loadingError()) {
client->didFail(*response->loadingError());
return;
}
if (response->isBodyReceivedByChunk()) {
response->consumeBodyReceivedByChunk([client = WTFMove(client)] (auto&& result) mutable {
if (result.hasException()) {
client->didFail(FetchEvent::createResponseError(URL { }, result.exception().message()));
return;
}
if (auto chunk = result.returnValue())
client->didReceiveData(SharedBuffer::create(reinterpret_cast<const char*>(chunk->data), chunk->size));
else
client->didFinish();
});
return;
}
auto body = response->consumeBody();
WTF::switchOn(body, [&] (Ref<FormData>& formData) {
client->didReceiveFormDataAndFinish(WTFMove(formData));
}, [&] (Ref<SharedBuffer>& buffer) {
client->didReceiveData(WTFMove(buffer));
client->didFinish();
}, [&] (std::nullptr_t&) {
client->didFinish();
});
}
void dispatchFetchEvent(Ref<Client>&& client, ServiceWorkerGlobalScope& globalScope, std::optional<ServiceWorkerClientIdentifier> clientId, ResourceRequest&& request, String&& referrer, FetchOptions&& options)
{
auto requestHeaders = FetchHeaders::create(FetchHeaders::Guard::Immutable, HTTPHeaderMap { request.httpHeaderFields() });
bool isNavigation = options.mode == FetchOptions::Mode::Navigate;
bool isNonSubresourceRequest = WebCore::isNonSubresourceRequest(options.destination);
ASSERT(globalScope.registration().active());
ASSERT(globalScope.registration().active()->identifier() == globalScope.thread().identifier());
ASSERT(globalScope.registration().active()->state() == ServiceWorkerState::Activated);
auto* formData = request.httpBody();
std::optional<FetchBody> body;
if (formData && !formData->isEmpty()) {
body = FetchBody::fromFormData(*formData);
if (!body) {
client->didNotHandle();
return;
}
}
if (isNavigation)
options.redirect = FetchOptions::Redirect::Manual;
URL requestURL = request.url();
auto fetchRequest = FetchRequest::create(globalScope, WTFMove(body), WTFMove(requestHeaders), WTFMove(request), WTFMove(options), WTFMove(referrer));
FetchEvent::Init init;
init.request = WTFMove(fetchRequest);
if (isNavigation) {
if (clientId)
init.targetClientId = clientId->toString();
} else if (clientId)
init.clientId = clientId->toString();
init.cancelable = true;
auto event = FetchEvent::create(eventNames().fetchEvent, WTFMove(init), Event::IsTrusted::Yes);
event->onResponse([client = client.copyRef()] (auto&& result) mutable {
processResponse(WTFMove(client), WTFMove(result));
});
globalScope.dispatchEvent(event);
if (!event->respondWithEntered()) {
if (event->defaultPrevented()) {
client->didFail(ResourceError { errorDomainWebKitInternal, 0, requestURL, "Fetch event was canceled"_s });
return;
}
client->didNotHandle();
}
globalScope.updateExtendedEventsSet(event.ptr());
auto& registration = globalScope.registration();
if (isNonSubresourceRequest || registration.needsUpdate())
registration.scheduleSoftUpdate();
}
}
}
#endif // ENABLE(SERVICE_WORKER)