Project import generated by Copybara.

PiperOrigin-RevId: 229942388
Change-Id: Ib5a23c152c95ed4294cece9f902227c21ce531ef

spdy/core/spdy_headers_handler_interface.h

diff --git a/spdy/core/spdy_headers_handler_interface.h b/spdy/core/spdy_headers_handler_interface.h
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+++ b/spdy/core/spdy_headers_handler_interface.h
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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 QUICHE_SPDY_CORE_SPDY_HEADERS_HANDLER_INTERFACE_H_
+#define QUICHE_SPDY_CORE_SPDY_HEADERS_HANDLER_INTERFACE_H_
+
+#include <stddef.h>
+
+#include "net/third_party/quiche/src/spdy/platform/api/spdy_export.h"
+#include "net/third_party/quiche/src/spdy/platform/api/spdy_string_piece.h"
+
+namespace spdy {
+
+// This interface defines how an object that accepts header data should behave.
+// It is used by both SpdyHeadersBlockParser and HpackDecoder.
+class SPDY_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(SpdyStringPiece key, SpdyStringPiece value) = 0;
+
+  // A callback method which notifies when the parser finishes handling a
+  // header block (i.e. the containing frame has the END_HEADERS flag set).
+  // Also indicates the total number of bytes in this block.
+  virtual void OnHeaderBlockEnd(size_t uncompressed_header_bytes,
+                                size_t compressed_header_bytes) = 0;
+};
+
+}  // namespace spdy
+
+#endif  // QUICHE_SPDY_CORE_SPDY_HEADERS_HANDLER_INTERFACE_H_