The Tor Browser: netwerk/base/src/nsPreloadedStream.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /**

     7  * This class allows you to prefix an existing nsIAsyncInputStream

     8  * with a preloaded block of data known at construction time by wrapping the

     9  * two data sources into a new nsIAsyncInputStream. Readers of the new

    10  * stream initially see the preloaded data and when that has been exhausted

    11  * they automatically read from the wrapped stream.

    12  *

    13  * It is used by nsHttpConnection when it has over buffered while reading from

    14  * the HTTP input socket and accidentally consumed data that belongs to

    15  * a different protocol via the HTTP Upgrade mechanism. That over-buffered

    16  * data is preloaded together with the input socket to form the new input socket

    17  * given to the new protocol handler.

    18 */

    20 #ifndef nsPreloadedStream_h__

    21 #define nsPreloadedStream_h__

    23 #include "nsIAsyncInputStream.h"

    24 #include "nsCOMPtr.h"

    25 #include "mozilla/Attributes.h"

    27 namespace mozilla {

    28 namespace net {

    30 class nsPreloadedStream MOZ_FINAL : public nsIAsyncInputStream

    31 {

    32  public:

    33     NS_DECL_THREADSAFE_ISUPPORTS

    34     NS_DECL_NSIINPUTSTREAM

    35     NS_DECL_NSIASYNCINPUTSTREAM

    37     nsPreloadedStream(nsIAsyncInputStream *aStream,

    38                       const char *data, uint32_t datalen);

    39 private:

    40     ~nsPreloadedStream();

    42     nsCOMPtr<nsIAsyncInputStream> mStream;

    44     char *mBuf;

    45     uint32_t mOffset;

    46     uint32_t mLen;

    47 };

    49 } // namespace net

    50 } // namespace mozilla

    52 #endif

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