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-rw-r--r--netwerk/base/MemoryDownloader.h65
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diff --git a/netwerk/base/MemoryDownloader.h b/netwerk/base/MemoryDownloader.h
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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/. */
+
+#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
+{
+public:
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIREQUESTOBSERVER
+ NS_DECL_NSISTREAMLISTENER
+
+ typedef mozilla::UniquePtr<FallibleTArray<uint8_t>> Data;
+
+ class IObserver : public nsISupports {
+ public:
+ // 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);
+
+private:
+ virtual ~MemoryDownloader();
+
+ 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__