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// Copyright 2016 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_HTTP2_HPACK_DECODER_HPACK_BLOCK_DECODER_H_
#define QUICHE_HTTP2_HPACK_DECODER_HPACK_BLOCK_DECODER_H_
// HpackBlockDecoder decodes an entire HPACK block (or the available portion
// thereof in the DecodeBuffer) into entries, but doesn't include HPACK static
// or dynamic table support, so table indices remain indices at this level.
// Reports the entries to an HpackEntryDecoderListener.
#include <string>
#include "quiche/http2/decoder/decode_buffer.h"
#include "quiche/http2/decoder/decode_status.h"
#include "quiche/http2/hpack/decoder/hpack_decoding_error.h"
#include "quiche/http2/hpack/decoder/hpack_entry_decoder.h"
#include "quiche/http2/hpack/decoder/hpack_entry_decoder_listener.h"
#include "quiche/common/platform/api/quiche_export.h"
#include "quiche/common/platform/api/quiche_logging.h"
namespace http2 {
class QUICHE_EXPORT HpackBlockDecoder {
public:
explicit HpackBlockDecoder(HpackEntryDecoderListener* listener)
: listener_(listener) {
QUICHE_DCHECK_NE(listener_, nullptr);
}
~HpackBlockDecoder() {}
HpackBlockDecoder(const HpackBlockDecoder&) = delete;
HpackBlockDecoder& operator=(const HpackBlockDecoder&) = delete;
// Prepares the decoder to start decoding a new HPACK block. Expected
// to be called from an implementation of Http2FrameDecoderListener's
// OnHeadersStart or OnPushPromiseStart methods.
void Reset() {
QUICHE_DVLOG(2) << "HpackBlockDecoder::Reset";
before_entry_ = true;
}
// Decode the fragment of the HPACK block contained in the decode buffer.
// Expected to be called from an implementation of Http2FrameDecoderListener's
// OnHpackFragment method.
DecodeStatus Decode(DecodeBuffer* db);
// Is the decoding process between entries (i.e. would the next byte be the
// first byte of a new HPACK entry)?
bool before_entry() const { return before_entry_; }
// Return error code after decoding error occurred in HpackEntryDecoder.
HpackDecodingError error() const { return entry_decoder_.error(); }
std::string DebugString() const;
private:
HpackEntryDecoder entry_decoder_;
HpackEntryDecoderListener* const listener_;
bool before_entry_ = true;
};
QUICHE_EXPORT std::ostream& operator<<(std::ostream& out,
const HpackBlockDecoder& v);
} // namespace http2
#endif // QUICHE_HTTP2_HPACK_DECODER_HPACK_BLOCK_DECODER_H_