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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_SPDY_SPDY_HEADERS_HANDLER_INTERFACE_H_
#define NET_SPDY_SPDY_HEADERS_HANDLER_INTERFACE_H_
#include <stddef.h>
#include "base/strings/string_piece.h"
#include "net/base/net_export.h"
namespace net {
// This interface defines how an object that accepts header data should behave.
// It is used by both SpdyHeadersBlockParser and HpackDecoder.
class NET_EXPORT_PRIVATE SpdyHeadersHandlerInterface {
public:
virtual ~SpdyHeadersHandlerInterface() {}
// A callback method which notifies when the parser starts handling a new
// header block. Will only be called once per block, even if it extends into
// CONTINUATION frames.
virtual void OnHeaderBlockStart() = 0;
// A callback method which notifies on a header key value pair. Multiple
// values for a given key will be emitted as multiple calls to OnHeader.
virtual void OnHeader(base::StringPiece key, base::StringPiece value) = 0;
// A callback method which notifies when the parser finishes handling a
// header block (i.e. the containing frame has the END_STREAM flag set).
// Also indicates the total number of bytes in this block.
virtual void OnHeaderBlockEnd(size_t uncompressed_header_bytes) = 0;
};
} // namespace net
#endif // NET_SPDY_SPDY_HEADERS_HANDLER_INTERFACE_H_
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