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 "MIMETypeRegistry.h"
#include "ReadableStreamChunk.h"
#include "ResourceRequest.h"
#include "ServiceWorker.h"
#include "ServiceWorkerClientIdentifier.h"
#include "ServiceWorkerGlobalScope.h"
#include "ServiceWorkerThread.h"
#include "WorkerGlobalScope.h"
namespace WebCore {
namespace ServiceWorkerFetch {
static inline Optional<ResourceError> validateResponse(const ResourceResponse& response, FetchOptions::Mode mode, FetchOptions::Redirect redirect)
{
if (response.type() == ResourceResponse::Type::Error)
return ResourceError { errorDomainWebKitInternal, 0, response.url(), "Response served by service worker is an error"_s, ResourceError::Type::General };
if (mode != FetchOptions::Mode::NoCors && response.tainting() == ResourceResponse::Tainting::Opaque)
return ResourceError { errorDomainWebKitInternal, 0, response.url(), "Response served by service worker is opaque"_s, ResourceError::Type::AccessControl };
if (redirect != FetchOptions::Redirect::Manual && mode != FetchOptions::Mode::Navigate && response.tainting() == ResourceResponse::Tainting::Opaqueredirect)
return ResourceError { errorDomainWebKitInternal, 0, response.url(), "Response served by service worker is opaque redirect"_s, ResourceError::Type::AccessControl };
if ((redirect != FetchOptions::Redirect::Follow || mode == FetchOptions::Mode::Navigate) && response.isRedirected())
return ResourceError { errorDomainWebKitInternal, 0, response.url(), "Response served by service worker has redirections"_s, ResourceError::Type::AccessControl };
return { };
}
static void processResponse(Ref<Client>&& client, Expected<Ref<FetchResponse>, ResourceError>&& result, FetchOptions::Mode mode, FetchOptions::Redirect redirect, const URL& requestURL, CertificateInfo&& certificateInfo)
{
if (!result.has_value()) {
client->didFail(result.error());
return;
}
auto response = WTFMove(result.value());
auto loadingError = response->loadingError();
if (!loadingError.isNull()) {
client->didFail(loadingError);
return;
}
auto resourceResponse = response->resourceResponse();
if (auto error = validateResponse(resourceResponse, mode, redirect)) {
client->didFail(error.value());
return;
}
if (resourceResponse.isRedirection() && resourceResponse.httpHeaderFields().contains(HTTPHeaderName::Location)) {
client->didReceiveRedirection(resourceResponse);
return;
}
if (mode == FetchOptions::Mode::Navigate) {
if (resourceResponse.mimeType() == defaultMIMEType()) {
resourceResponse.setMimeType("text/html"_s);
resourceResponse.setTextEncodingName("UTF-8"_s);
}
if (!resourceResponse.certificateInfo())
resourceResponse.setCertificateInfo(WTFMove(certificateInfo));
}
if (resourceResponse.url().isNull())
resourceResponse.setURL(requestURL);
client->didReceiveResponse(resourceResponse);
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, Optional<ServiceWorkerClientIdentifier> clientId, ResourceRequest&& request, String&& referrer, FetchOptions&& options)
{
auto requestHeaders = FetchHeaders::create(FetchHeaders::Guard::Immutable, HTTPHeaderMap { request.httpHeaderFields() });
FetchOptions::Mode mode = options.mode;
FetchOptions::Redirect redirect = options.redirect;
bool isNavigation = options.mode == FetchOptions::Mode::Navigate;
ASSERT(globalScope.registration().active());
ASSERT(globalScope.registration().active()->identifier() == globalScope.thread().identifier());
ASSERT(globalScope.registration().active()->state() == ServiceWorkerState::Activated);
auto* formData = request.httpBody();
Optional<FetchBody> body;
if (formData && !formData->isEmpty()) {
body = FetchBody::fromFormData(globalScope, *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);
CertificateInfo certificateInfo = globalScope.certificateInfo();
event->onResponse([client, mode, redirect, requestURL, certificateInfo = WTFMove(certificateInfo)] (auto&& result) mutable {
processResponse(WTFMove(client), WTFMove(result), mode, redirect, requestURL, WTFMove(certificateInfo));
});
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());
}
}
}
#endif // ENABLE(SERVICE_WORKER)