Index: net/spdy/hpack/hpack_decoder2.h |
diff --git a/net/spdy/hpack/hpack_decoder2.h b/net/spdy/hpack/hpack_decoder2.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..6dd207c0aad1d51b04905c168fa31a325df46c22 |
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+++ b/net/spdy/hpack/hpack_decoder2.h |
@@ -0,0 +1,146 @@ |
+// 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 NET_SPDY_HPACK_HPACK_DECODER2_H_ |
+#define NET_SPDY_HPACK_HPACK_DECODER2_H_ |
+ |
+// HpackDecoder2 |
+ |
+// An HpackDecoder decodes header sets as outlined in |
+// http://tools.ietf.org/html/rfc7541. This implementation uses the |
+// new HpackBlockDecoder in //net/http2/hpack/ |
+ |
+#include <stddef.h> |
+ |
+#include <memory> |
+#include <string> |
+ |
+#include "base/macros.h" |
+#include "base/strings/string_piece.h" |
+#include "net/base/net_export.h" |
+#include "net/http2/hpack/decoder/hpack_block_decoder.h" |
+#include "net/http2/hpack/decoder/hpack_decoder_string_buffer.h" |
+#include "net/http2/hpack/decoder/hpack_entry_decoder_listener.h" |
+#include "net/http2/hpack/http2_hpack_constants.h" |
+#include "net/http2/hpack/huffman/http2_hpack_huffman_decoder.h" |
+#include "net/spdy/hpack/hpack_constants.h" |
+#include "net/spdy/hpack/hpack_decoder_interface.h" |
+#include "net/spdy/hpack/hpack_header_table.h" |
+#include "net/spdy/spdy_header_block.h" |
+#include "net/spdy/spdy_headers_handler_interface.h" |
+ |
+namespace net { |
+namespace test { |
+class HpackDecoder2Peer; |
+} // namespace test |
+ |
+class NET_EXPORT_PRIVATE HpackDecoder2 : public HpackDecoderInterface, |
+ HpackEntryDecoderListener { |
+ public: |
+ friend test::HpackDecoder2Peer; |
+ HpackDecoder2(); |
+ ~HpackDecoder2() override; |
+ |
+ // Override the interface methods: |
+ |
+ void ApplyHeaderTableSizeSetting(size_t size_setting) override; |
+ void HandleControlFrameHeadersStart( |
+ SpdyHeadersHandlerInterface* handler) override; |
+ bool HandleControlFrameHeadersData(const char* headers_data, |
+ size_t headers_data_length) override; |
+ bool HandleControlFrameHeadersComplete(size_t* compressed_len) override; |
+ const SpdyHeaderBlock& decoded_block() const override; |
+ void SetHeaderTableDebugVisitor( |
+ std::unique_ptr<HpackHeaderTable::DebugVisitorInterface> visitor) |
+ override; |
+ void set_max_decode_buffer_size_bytes( |
+ size_t max_decode_buffer_size_bytes) override; |
+ |
+ protected: |
+ // Override the HpackEntryDecoderListener methods: |
+ |
+ void OnIndexedHeader(size_t index) override; |
+ void OnStartLiteralHeader(HpackEntryType entry_type, |
+ size_t maybe_name_index) override; |
+ void OnNameStart(bool huffman_encoded, size_t len) override; |
+ void OnNameData(const char* data, size_t len) override; |
+ void OnNameEnd() override; |
+ void OnValueStart(bool huffman_encoded, size_t len) override; |
+ void OnValueData(const char* data, size_t len) override; |
+ void OnValueEnd() override; |
+ void OnDynamicTableSizeUpdate(size_t size) override; |
+ |
+ private: |
+ // Called when a complete header entry has been decoded, with the name and |
+ // value of the entry. If check_header_order_ is true, confirms that |
+ // pseudo-headers don't appear after normal headers, else it treats the |
+ // headers as malformed, as per sections 8.1.2.3. of the HTTP2 specification. |
+ // Calls handler_->OnHeader() if there is a handler, else adds the header |
+ // to decoded_block_. |
+ void HandleHeaderRepresentation(base::StringPiece name, |
+ base::StringPiece value); |
+ |
+ // Reset state in preparation for decoding a new HPACK block. Does not reset |
+ // the dynamic table. |
+ void Reset(); |
+ |
+ // Called when an error is detected while decoding. Replaces the listener |
+ // in the HpackBlockDecoder with the no-op listener. |
+ void SetErrorDetected(); |
+ |
+ // Enforce the limit on the maximum size of strings that can be buffered. |
+ // It happens that this test is made after the strings have been buffered, |
+ // but that isn't a problem because we don't pass enormous buffers into |
+ // HandleControlFrameHeadersData. |
+ bool EnforceMaxDecodeBufferSize(); |
+ |
+ HpackHeaderTable header_table_; |
+ SpdyHeaderBlock decoded_block_; |
+ |
+ // Scratch space for storing decoded literals. |
+ HpackDecoderStringBuffer name_, value_; |
+ |
+ // If non-NULL, handles decoded headers. |
+ SpdyHeadersHandlerInterface* handler_; |
+ |
+ HpackEntryDecoderNoOpListener no_op_listener_; |
+ |
+ // Total bytes that have been received as input (i.e. HPACK encoded). |
+ size_t total_hpack_bytes_; |
+ |
+ // Total bytes of the name and value strings in the current HPACK block. |
+ size_t total_header_bytes_; |
+ |
+ // How much encoded data this decoder is willing to buffer. |
+ size_t max_decode_buffer_size_bytes_ = 32 * 1024; // 32 KB |
+ |
+ HpackBlockDecoder hpack_block_decoder_; |
+ |
+ // Count of Dynamic Table Size Updates seen in the current HPACK block. |
+ uint32_t size_update_count_; |
+ |
+ // The type of the current header entry (with literals) that is being decoded. |
+ HpackEntryType entry_type_; |
+ |
+ // Has a header been seen in the current HPACK block? |
+ bool header_seen_; |
+ |
+ // Did the HpackBlockDecoder stop in the middle of an entry? |
+ bool in_progress_; |
+ |
+ // Has an error been detected while decoding the HPACK block? |
+ bool error_detected_; |
+ |
+ // Flag to keep track of having seen the header block start. Needed at the |
+ // moment because HandleControlFrameHeadersStart won't be called if a handler |
+ // is not being provided by the caller. |
+ // TODO(jamessynge): Consider collapsing several of these bools into a single |
+ // enum representing the state of the decoding process. |
+ bool header_block_started_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(HpackDecoder2); |
+}; |
+ |
+} // namespace net |
+#endif // NET_SPDY_HPACK_HPACK_DECODER2_H_ |