зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.3 KiB
C++
72 строки
2.3 KiB
C++
/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MemoryDownloader.h"
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#include "mozilla/Assertions.h"
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#include "nsIInputStream.h"
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namespace mozilla {
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namespace net {
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NS_IMPL_ISUPPORTS(MemoryDownloader, nsIStreamListener, nsIRequestObserver)
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MemoryDownloader::MemoryDownloader(IObserver* aObserver)
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: mObserver(aObserver), mStatus(NS_ERROR_NOT_INITIALIZED) {}
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NS_IMETHODIMP
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MemoryDownloader::OnStartRequest(nsIRequest* aRequest) {
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MOZ_ASSERT(!mData);
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mData.reset(new FallibleTArray<uint8_t>());
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mStatus = NS_OK;
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return NS_OK;
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}
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NS_IMETHODIMP
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MemoryDownloader::OnStopRequest(nsIRequest* aRequest, nsresult aStatus) {
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MOZ_ASSERT_IF(NS_FAILED(mStatus), NS_FAILED(aStatus));
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MOZ_ASSERT(!mData == NS_FAILED(mStatus));
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Data data;
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data.swap(mData);
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RefPtr<IObserver> observer;
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observer.swap(mObserver);
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observer->OnDownloadComplete(this, aRequest, aStatus, std::move(data));
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return NS_OK;
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}
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nsresult MemoryDownloader::ConsumeData(nsIInputStream* aIn, void* aClosure,
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const char* aFromRawSegment,
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uint32_t aToOffset, uint32_t aCount,
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uint32_t* aWriteCount) {
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MemoryDownloader* self = static_cast<MemoryDownloader*>(aClosure);
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if (!self->mData->AppendElements(aFromRawSegment, aCount, fallible)) {
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// The error returned by ConsumeData isn't propagated to the
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// return of ReadSegments, so it has to be passed as state.
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self->mStatus = NS_ERROR_OUT_OF_MEMORY;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aWriteCount = aCount;
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return NS_OK;
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}
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NS_IMETHODIMP
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MemoryDownloader::OnDataAvailable(nsIRequest* aRequest, nsIInputStream* aInStr,
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uint64_t aSourceOffset, uint32_t aCount) {
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uint32_t n;
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MOZ_ASSERT(mData);
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nsresult rv = aInStr->ReadSegments(ConsumeData, this, aCount, &n);
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if (NS_SUCCEEDED(mStatus) && NS_FAILED(rv)) {
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mStatus = rv;
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}
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if (NS_WARN_IF(NS_FAILED(mStatus))) {
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mData.reset(nullptr);
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return mStatus;
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}
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return NS_OK;
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}
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} // namespace net
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} // namespace mozilla
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