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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 */
#ifndef mozilla_net_MemoryDownloader_h__
#define mozilla_net_MemoryDownloader_h__
#include "mozilla/UniquePtr.h"
#include "nsCOMPtr.h"
#include "nsIStreamListener.h"
#include "nsTArray.h"
* mozilla::net::MemoryDownloader
* This class is similar to nsIDownloader, but stores the downloaded
* stream in memory instead of a file. Ownership of the temporary
* memory is transferred to the observer when download is complete;
* there is no need to retain a reference to the downloader.
namespace mozilla {
namespace net {
class MemoryDownloader final : public nsIStreamListener {
using Data = mozilla::UniquePtr<FallibleTArray<uint8_t>>;
class IObserver : public nsISupports {
// Note: aData may be null if (and only if) aStatus indicates failure.
virtual void OnDownloadComplete(MemoryDownloader* aDownloader,
nsIRequest* aRequest, nsISupports* aCtxt,
nsresult aStatus, Data aData) = 0;
explicit MemoryDownloader(IObserver* aObserver);
virtual ~MemoryDownloader() = default;
static nsresult ConsumeData(nsIInputStream* in, void* closure,
const char* fromRawSegment, uint32_t toOffset,
uint32_t count, uint32_t* writeCount);
RefPtr<IObserver> mObserver;
Data mData;
nsresult mStatus;
} // namespace net
} // namespace mozilla
#endif // mozilla_net_MemoryDownloader_h__