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/* -*- Mode: C++; 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/. */
#include "MemoryDownloader.h"
#include "mozilla/Assertions.h"
#include "nsIInputStream.h"
namespace mozilla {
namespace net {
NS_IMPL_ISUPPORTS(MemoryDownloader, nsIStreamListener, nsIRequestObserver)
MemoryDownloader::MemoryDownloader(IObserver* aObserver)
: mObserver(aObserver), mStatus(NS_ERROR_NOT_INITIALIZED) {}
NS_IMETHODIMP
MemoryDownloader::OnStartRequest(nsIRequest* aRequest) {
MOZ_ASSERT(!mData);
mData.reset(new FallibleTArray<uint8_t>());
mStatus = NS_OK;
return NS_OK;
}
NS_IMETHODIMP
MemoryDownloader::OnStopRequest(nsIRequest* aRequest, nsresult aStatus) {
MOZ_ASSERT_IF(NS_FAILED(mStatus), NS_FAILED(aStatus));
MOZ_ASSERT(!mData == NS_FAILED(mStatus));
Data data;
data.swap(mData);
RefPtr<IObserver> observer;
observer.swap(mObserver);
observer->OnDownloadComplete(this, aRequest, aStatus, std::move(data));
return NS_OK;
}
nsresult MemoryDownloader::ConsumeData(nsIInputStream* aIn, void* aClosure,
const char* aFromRawSegment,
uint32_t aToOffset, uint32_t aCount,
uint32_t* aWriteCount) {
MemoryDownloader* self = static_cast<MemoryDownloader*>(aClosure);
if (!self->mData->AppendElements(aFromRawSegment, aCount, fallible)) {
// The error returned by ConsumeData isn't propagated to the
// return of ReadSegments, so it has to be passed as state.
self->mStatus = NS_ERROR_OUT_OF_MEMORY;
return NS_ERROR_OUT_OF_MEMORY;
}
*aWriteCount = aCount;
return NS_OK;
}
NS_IMETHODIMP
MemoryDownloader::OnDataAvailable(nsIRequest* aRequest, nsIInputStream* aInStr,
uint64_t aSourceOffset, uint32_t aCount) {
uint32_t n;
MOZ_ASSERT(mData);
nsresult rv = aInStr->ReadSegments(ConsumeData, this, aCount, &n);
if (NS_SUCCEEDED(mStatus) && NS_FAILED(rv)) {
mStatus = rv;
}
if (NS_WARN_IF(NS_FAILED(mStatus))) {
mData.reset(nullptr);
return mStatus;
}
return NS_OK;
}
} // namespace net
} // namespace mozilla
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