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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_FetchDriver_h
#define mozilla_dom_FetchDriver_h
#include "nsIChannelEventSink.h"
#include "nsIInterfaceRequestor.h"
#include "nsIStreamListener.h"
#include "nsIThreadRetargetableStreamListener.h"
#include "mozilla/ConsoleReportCollector.h"
#include "mozilla/dom/AbortSignal.h"
#include "mozilla/dom/SRIMetadata.h"
#include "mozilla/RefPtr.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/net/ReferrerPolicy.h"
class nsIConsoleReportCollector;
class nsIDocument;
class nsIOutputStream;
class nsILoadGroup;
class nsIPrincipal;
namespace mozilla {
namespace dom {
class InternalRequest;
class InternalResponse;
/**
* Provides callbacks to be called when response is available or on error.
* Implemenations usually resolve or reject the promise returned from fetch().
* The callbacks can be called synchronously or asynchronously from FetchDriver::Fetch.
*/
class FetchDriverObserver
{
public:
FetchDriverObserver() : mReporter(new ConsoleReportCollector())
, mGotResponseAvailable(false)
{ }
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FetchDriverObserver);
void OnResponseAvailable(InternalResponse* aResponse)
{
MOZ_ASSERT(!mGotResponseAvailable);
mGotResponseAvailable = true;
OnResponseAvailableInternal(aResponse);
}
enum EndReason
{
eAborted,
eByNetworking,
};
virtual void OnResponseEnd(EndReason aReason)
{ };
nsIConsoleReportCollector* GetReporter() const
{
return mReporter;
}
virtual void FlushConsoleReport() = 0;
virtual void OnDataAvailable() = 0;
protected:
virtual ~FetchDriverObserver()
{ };
virtual void OnResponseAvailableInternal(InternalResponse* aResponse) = 0;
nsCOMPtr<nsIConsoleReportCollector> mReporter;
private:
bool mGotResponseAvailable;
};
class FetchDriver final : public nsIStreamListener,
public nsIChannelEventSink,
public nsIInterfaceRequestor,
public nsIThreadRetargetableStreamListener,
public AbortSignal::Follower
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSITHREADRETARGETABLESTREAMLISTENER
FetchDriver(InternalRequest* aRequest,
nsIPrincipal* aPrincipal,
nsILoadGroup* aLoadGroup);
nsresult Fetch(AbortSignal* aSignal,
FetchDriverObserver* aObserver);
void
SetDocument(nsIDocument* aDocument);
void
SetWorkerScript(const nsACString& aWorkerScirpt)
{
MOZ_ASSERT(!aWorkerScirpt.IsEmpty());
mWorkerScript = aWorkerScirpt;
}
// AbortSignal::Follower
void
Aborted() override;
private:
nsCOMPtr<nsIPrincipal> mPrincipal;
nsCOMPtr<nsILoadGroup> mLoadGroup;
RefPtr<InternalRequest> mRequest;
RefPtr<InternalResponse> mResponse;
nsCOMPtr<nsIOutputStream> mPipeOutputStream;
RefPtr<FetchDriverObserver> mObserver;
nsCOMPtr<nsIDocument> mDocument;
nsCOMPtr<nsIChannel> mChannel;
nsAutoPtr<SRICheckDataVerifier> mSRIDataVerifier;
SRIMetadata mSRIMetadata;
nsCString mWorkerScript;
#ifdef DEBUG
bool mResponseAvailableCalled;
bool mFetchCalled;
#endif
FetchDriver() = delete;
FetchDriver(const FetchDriver&) = delete;
FetchDriver& operator=(const FetchDriver&) = delete;
~FetchDriver();
nsresult HttpFetch();
// Returns the filtered response sent to the observer.
already_AddRefed<InternalResponse>
BeginAndGetFilteredResponse(InternalResponse* aResponse,
bool aFoundOpaqueRedirect);
// Utility since not all cases need to do any post processing of the filtered
// response.
void FailWithNetworkError();
void SetRequestHeaders(nsIHttpChannel* aChannel) const;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_FetchDriver_h
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