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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/RespondWithObserver.h"
#include "bindings/core/v8/ScriptFunction.h"
#include "bindings/core/v8/ScriptPromise.h"
#include "bindings/core/v8/ScriptValue.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/modules/v8/V8Response.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/ExecutionContext.h"
#include "core/inspector/ConsoleMessage.h"
#include "core/streams/Stream.h"
#include "modules/fetch/BodyStreamBuffer.h"
#include "modules/fetch/BytesConsumer.h"
#include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "public/platform/modules/serviceworker/WebServiceWorkerResponse.h"
#include "wtf/Assertions.h"
#include "wtf/RefPtr.h"
#include <v8.h>
namespace blink {
namespace {
// Returns the error message to let the developer know about the reason of the
// unusual failures.
const String getMessageForResponseError(WebServiceWorkerResponseError error,
const KURL& requestURL) {
String errorMessage = "The FetchEvent for \"" + requestURL.getString() +
"\" resulted in a network error response: ";
switch (error) {
case WebServiceWorkerResponseErrorPromiseRejected:
errorMessage = errorMessage + "the promise was rejected.";
break;
case WebServiceWorkerResponseErrorDefaultPrevented:
errorMessage =
errorMessage +
"preventDefault() was called without calling respondWith().";
break;
case WebServiceWorkerResponseErrorNoV8Instance:
errorMessage =
errorMessage +
"an object that was not a Response was passed to respondWith().";
break;
case WebServiceWorkerResponseErrorResponseTypeError:
errorMessage = errorMessage +
"the promise was resolved with an error response object.";
break;
case WebServiceWorkerResponseErrorResponseTypeOpaque:
errorMessage = errorMessage +
"an \"opaque\" response was used for a request whose type "
"is not no-cors";
break;
case WebServiceWorkerResponseErrorResponseTypeNotBasicOrDefault:
ASSERT_NOT_REACHED();
break;
case WebServiceWorkerResponseErrorBodyUsed:
errorMessage = errorMessage +
"a Response whose \"bodyUsed\" is \"true\" cannot be used "
"to respond to a request.";
break;
case WebServiceWorkerResponseErrorResponseTypeOpaqueForClientRequest:
errorMessage = errorMessage +
"an \"opaque\" response was used for a client request.";
break;
case WebServiceWorkerResponseErrorResponseTypeOpaqueRedirect:
errorMessage = errorMessage +
"an \"opaqueredirect\" type response was used for a "
"request whose redirect mode is not \"manual\".";
break;
case WebServiceWorkerResponseErrorBodyLocked:
errorMessage = errorMessage +
"a Response whose \"body\" is locked cannot be used to "
"respond to a request.";
break;
case WebServiceWorkerResponseErrorNoForeignFetchResponse:
errorMessage = errorMessage +
"an object that was not a ForeignFetchResponse was passed "
"to respondWith().";
break;
case WebServiceWorkerResponseErrorForeignFetchHeadersWithoutOrigin:
errorMessage =
errorMessage +
"headers were specified for a response without an explicit origin.";
break;
case WebServiceWorkerResponseErrorForeignFetchMismatchedOrigin:
errorMessage =
errorMessage + "origin in response does not match origin of request.";
break;
case WebServiceWorkerResponseErrorRedirectedResponseForNotFollowRequest:
errorMessage = errorMessage +
"a redirected response was used for a request whose "
"redirect mode is not \"follow\".";
break;
case WebServiceWorkerResponseErrorUnknown:
default:
errorMessage = errorMessage + "an unexpected error occurred.";
break;
}
return errorMessage;
}
const String getErrorMessageForRedirectedResponseForNavigationRequest(
const KURL& requestURL,
const Vector<KURL>& responseURLList) {
String errorMessage =
"In Chrome 59, the navigation to \"" + requestURL.getString() + "\" " +
"will result in a network error, because FetchEvent.respondWith() was " +
"called with a redirected response. See https://crbug.com/658249. The " +
"url list of the response was: [\"" + responseURLList[0].getString() +
"\"";
for (size_t i = 1; i < responseURLList.size(); ++i) {
errorMessage =
errorMessage + ", \"" + responseURLList[i].getString() + "\"";
}
return errorMessage + "]";
}
bool isNavigationRequest(WebURLRequest::FrameType frameType) {
return frameType != WebURLRequest::FrameTypeNone;
}
bool isClientRequest(WebURLRequest::FrameType frameType,
WebURLRequest::RequestContext requestContext) {
return isNavigationRequest(frameType) ||
requestContext == WebURLRequest::RequestContextSharedWorker ||
requestContext == WebURLRequest::RequestContextWorker;
}
class NoopLoaderClient final
: public GarbageCollectedFinalized<NoopLoaderClient>,
public FetchDataLoader::Client {
WTF_MAKE_NONCOPYABLE(NoopLoaderClient);
USING_GARBAGE_COLLECTED_MIXIN(NoopLoaderClient);
public:
NoopLoaderClient() = default;
void didFetchDataLoadedStream() override {}
void didFetchDataLoadFailed() override {}
DEFINE_INLINE_TRACE() { FetchDataLoader::Client::trace(visitor); }
};
} // namespace
class RespondWithObserver::ThenFunction final : public ScriptFunction {
public:
enum ResolveType {
Fulfilled,
Rejected,
};
static v8::Local<v8::Function> createFunction(ScriptState* scriptState,
RespondWithObserver* observer,
ResolveType type) {
ThenFunction* self = new ThenFunction(scriptState, observer, type);
return self->bindToV8Function();
}
DEFINE_INLINE_VIRTUAL_TRACE() {
visitor->trace(m_observer);
ScriptFunction::trace(visitor);
}
private:
ThenFunction(ScriptState* scriptState,
RespondWithObserver* observer,
ResolveType type)
: ScriptFunction(scriptState),
m_observer(observer),
m_resolveType(type) {}
ScriptValue call(ScriptValue value) override {
ASSERT(m_observer);
ASSERT(m_resolveType == Fulfilled || m_resolveType == Rejected);
if (m_resolveType == Rejected) {
m_observer->responseWasRejected(
WebServiceWorkerResponseErrorPromiseRejected);
value =
ScriptPromise::reject(value.getScriptState(), value).getScriptValue();
} else {
m_observer->responseWasFulfilled(value);
}
m_observer = nullptr;
return value;
}
Member<RespondWithObserver> m_observer;
ResolveType m_resolveType;
};
RespondWithObserver::~RespondWithObserver() {}
RespondWithObserver* RespondWithObserver::create(
ExecutionContext* context,
int fetchEventID,
const KURL& requestURL,
WebURLRequest::FetchRequestMode requestMode,
WebURLRequest::FetchRedirectMode redirectMode,
WebURLRequest::FrameType frameType,
WebURLRequest::RequestContext requestContext,
WaitUntilObserver* observer) {
return new RespondWithObserver(context, fetchEventID, requestURL, requestMode,
redirectMode, frameType, requestContext,
observer);
}
void RespondWithObserver::contextDestroyed(ExecutionContext*) {
if (m_observer) {
DCHECK_EQ(Pending, m_state);
m_observer.clear();
}
m_state = Done;
}
void RespondWithObserver::willDispatchEvent() {
m_eventDispatchTime = WTF::currentTime();
}
void RespondWithObserver::didDispatchEvent(DispatchEventResult dispatchResult) {
ASSERT(getExecutionContext());
if (m_state != Initial)
return;
if (dispatchResult != DispatchEventResult::NotCanceled) {
m_observer->incrementPendingActivity();
responseWasRejected(WebServiceWorkerResponseErrorDefaultPrevented);
return;
}
ServiceWorkerGlobalScopeClient::from(getExecutionContext())
->respondToFetchEvent(m_fetchEventID, m_eventDispatchTime);
m_state = Done;
m_observer.clear();
}
void RespondWithObserver::respondWith(ScriptState* scriptState,
ScriptPromise scriptPromise,
ExceptionState& exceptionState) {
if (m_state != Initial) {
exceptionState.throwDOMException(
InvalidStateError, "The fetch event has already been responded to.");
return;
}
m_state = Pending;
m_observer->incrementPendingActivity();
scriptPromise.then(
ThenFunction::createFunction(scriptState, this, ThenFunction::Fulfilled),
ThenFunction::createFunction(scriptState, this, ThenFunction::Rejected));
}
void RespondWithObserver::responseWasRejected(
WebServiceWorkerResponseError error) {
ASSERT(getExecutionContext());
getExecutionContext()->addConsoleMessage(
ConsoleMessage::create(JSMessageSource, WarningMessageLevel,
getMessageForResponseError(error, m_requestURL)));
// The default value of WebServiceWorkerResponse's status is 0, which maps
// to a network error.
WebServiceWorkerResponse webResponse;
webResponse.setError(error);
ServiceWorkerGlobalScopeClient::from(getExecutionContext())
->respondToFetchEvent(m_fetchEventID, webResponse, m_eventDispatchTime);
m_state = Done;
m_observer->decrementPendingActivity();
m_observer.clear();
}
void RespondWithObserver::responseWasFulfilled(const ScriptValue& value) {
ASSERT(getExecutionContext());
if (!V8Response::hasInstance(value.v8Value(),
toIsolate(getExecutionContext()))) {
responseWasRejected(WebServiceWorkerResponseErrorNoV8Instance);
return;
}
Response* response = V8Response::toImplWithTypeCheck(
toIsolate(getExecutionContext()), value.v8Value());
// "If one of the following conditions is true, return a network error:
// - |response|'s type is |error|.
// - |request|'s mode is not |no-cors| and response's type is |opaque|.
// - |request| is a client request and |response|'s type is neither
// |basic| nor |default|."
const FetchResponseData::Type responseType = response->response()->getType();
if (responseType == FetchResponseData::ErrorType) {
responseWasRejected(WebServiceWorkerResponseErrorResponseTypeError);
return;
}
if (responseType == FetchResponseData::OpaqueType) {
if (m_requestMode != WebURLRequest::FetchRequestModeNoCORS) {
responseWasRejected(WebServiceWorkerResponseErrorResponseTypeOpaque);
return;
}
// The request mode of client requests should be "same-origin" but it is
// not explicitly stated in the spec yet. So we need to check here.
// FIXME: Set the request mode of client requests to "same-origin" and
// remove this check when the spec will be updated.
// Spec issue: https://github.com/whatwg/fetch/issues/101
if (isClientRequest(m_frameType, m_requestContext)) {
responseWasRejected(
WebServiceWorkerResponseErrorResponseTypeOpaqueForClientRequest);
return;
}
}
if (m_redirectMode != WebURLRequest::FetchRedirectModeManual &&
responseType == FetchResponseData::OpaqueRedirectType) {
responseWasRejected(
WebServiceWorkerResponseErrorResponseTypeOpaqueRedirect);
return;
}
if (m_redirectMode != WebURLRequest::FetchRedirectModeFollow &&
response->redirected()) {
if (!isNavigationRequest(m_frameType)) {
responseWasRejected(
WebServiceWorkerResponseErrorRedirectedResponseForNotFollowRequest);
return;
}
// TODO(horo): We should just reject even if the request was a navigation.
// Currently we measure the impact of the restriction with the use counter
// in DocumentLoader.
getExecutionContext()->addConsoleMessage(ConsoleMessage::create(
JSMessageSource, ErrorMessageLevel,
getErrorMessageForRedirectedResponseForNavigationRequest(
m_requestURL, response->internalURLList())));
}
if (response->isBodyLocked()) {
responseWasRejected(WebServiceWorkerResponseErrorBodyLocked);
return;
}
if (response->bodyUsed()) {
responseWasRejected(WebServiceWorkerResponseErrorBodyUsed);
return;
}
WebServiceWorkerResponse webResponse;
response->populateWebServiceWorkerResponse(webResponse);
BodyStreamBuffer* buffer = response->internalBodyBuffer();
if (buffer) {
RefPtr<BlobDataHandle> blobDataHandle = buffer->drainAsBlobDataHandle(
BytesConsumer::BlobSizePolicy::AllowBlobWithInvalidSize);
if (blobDataHandle) {
webResponse.setBlobDataHandle(blobDataHandle);
} else {
Stream* outStream = Stream::create(getExecutionContext(), "");
webResponse.setStreamURL(outStream->url());
buffer->startLoading(FetchDataLoader::createLoaderAsStream(outStream),
new NoopLoaderClient);
}
}
ServiceWorkerGlobalScopeClient::from(getExecutionContext())
->respondToFetchEvent(m_fetchEventID, webResponse, m_eventDispatchTime);
m_state = Done;
m_observer->decrementPendingActivity();
m_observer.clear();
}
RespondWithObserver::RespondWithObserver(
ExecutionContext* context,
int fetchEventID,
const KURL& requestURL,
WebURLRequest::FetchRequestMode requestMode,
WebURLRequest::FetchRedirectMode redirectMode,
WebURLRequest::FrameType frameType,
WebURLRequest::RequestContext requestContext,
WaitUntilObserver* observer)
: ContextLifecycleObserver(context),
m_fetchEventID(fetchEventID),
m_requestURL(requestURL),
m_requestMode(requestMode),
m_redirectMode(redirectMode),
m_frameType(frameType),
m_requestContext(requestContext),
m_state(Initial),
m_observer(observer) {}
DEFINE_TRACE(RespondWithObserver) {
visitor->trace(m_observer);
ContextLifecycleObserver::trace(visitor);
}
} // namespace blink
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