1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/base/src/nsPreloadedStream.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,52 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/**
1.10 + * This class allows you to prefix an existing nsIAsyncInputStream
1.11 + * with a preloaded block of data known at construction time by wrapping the
1.12 + * two data sources into a new nsIAsyncInputStream. Readers of the new
1.13 + * stream initially see the preloaded data and when that has been exhausted
1.14 + * they automatically read from the wrapped stream.
1.15 + *
1.16 + * It is used by nsHttpConnection when it has over buffered while reading from
1.17 + * the HTTP input socket and accidentally consumed data that belongs to
1.18 + * a different protocol via the HTTP Upgrade mechanism. That over-buffered
1.19 + * data is preloaded together with the input socket to form the new input socket
1.20 + * given to the new protocol handler.
1.21 +*/
1.22 +
1.23 +#ifndef nsPreloadedStream_h__
1.24 +#define nsPreloadedStream_h__
1.25 +
1.26 +#include "nsIAsyncInputStream.h"
1.27 +#include "nsCOMPtr.h"
1.28 +#include "mozilla/Attributes.h"
1.29 +
1.30 +namespace mozilla {
1.31 +namespace net {
1.32 +
1.33 +class nsPreloadedStream MOZ_FINAL : public nsIAsyncInputStream
1.34 +{
1.35 + public:
1.36 + NS_DECL_THREADSAFE_ISUPPORTS
1.37 + NS_DECL_NSIINPUTSTREAM
1.38 + NS_DECL_NSIASYNCINPUTSTREAM
1.39 +
1.40 + nsPreloadedStream(nsIAsyncInputStream *aStream,
1.41 + const char *data, uint32_t datalen);
1.42 +private:
1.43 + ~nsPreloadedStream();
1.44 +
1.45 + nsCOMPtr<nsIAsyncInputStream> mStream;
1.46 +
1.47 + char *mBuf;
1.48 + uint32_t mOffset;
1.49 + uint32_t mLen;
1.50 +};
1.51 +
1.52 +} // namespace net
1.53 +} // namespace mozilla
1.54 +
1.55 +#endif
