Killing off QUICv12, including cleaning out all of the code for handling

net/quic/quic_data_stream.h

 // Copyright 2013 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.
 //
 // The base class for streams which deliver data to/from an application.
 // In each direction, the data on such a stream first contains compressed
 // headers then body data.
 
 #ifndef NET_QUIC_QUIC_DATA_STREAM_H_
 #define NET_QUIC_QUIC_DATA_STREAM_H_
 
 #include <sys/types.h>
 
 #include <list>
 
 #include "base/basictypes.h"
 #include "base/strings/string_piece.h"
 #include "net/base/iovec.h"
 #include "net/base/net_export.h"
 #include "net/quic/quic_ack_notifier.h"
 #include "net/quic/quic_protocol.h"
-#include "net/quic/quic_spdy_compressor.h"
-#include "net/quic/quic_spdy_decompressor.h"
 #include "net/quic/quic_stream_sequencer.h"
 #include "net/quic/reliable_quic_stream.h"
+#include "net/spdy/spdy_framer.h"
 
 namespace net {
 
 namespace test {
 class QuicDataStreamPeer;
 class ReliableQuicStreamPeer;
 }  // namespace test
 
 class IPEndPoint;
 class QuicSession;
 class SSLInfo;
 
 // All this does right now is send data to subclasses via the sequencer.
-class NET_EXPORT_PRIVATE QuicDataStream : public ReliableQuicStream,
-                                          public QuicSpdyDecompressor::Visitor {
+class NET_EXPORT_PRIVATE QuicDataStream : public ReliableQuicStream {
  public:
   // Visitor receives callbacks from the stream.
   class Visitor {
    public:
     Visitor() {}
 
     // Called when the stream is closed.
     virtual void OnClose(QuicDataStream* stream) = 0;
 
    protected:
     virtual ~Visitor() {}
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Visitor);
   };
 
   QuicDataStream(QuicStreamId id, QuicSession* session);
 
   virtual ~QuicDataStream();
 
   // ReliableQuicStream implementation
   virtual void OnClose() OVERRIDE;
   virtual uint32 ProcessRawData(const char* data, uint32 data_len) OVERRIDE;
   // By default, this is the same as priority(), however it allows streams
   // to temporarily alter effective priority.   For example if a SPDY stream has
   // compressed but not written headers it can write the headers with a higher
   // priority.
   virtual QuicPriority EffectivePriority() const OVERRIDE;
 
-  // QuicSpdyDecompressor::Visitor implementation.
-  virtual bool OnDecompressedData(base::StringPiece data) OVERRIDE;
-  virtual void OnDecompressionError() OVERRIDE;
-
-  // Overridden by subclasses to process data.  For QUIC_VERSION_12 or less,
-  // data will be delivered in order, first the decompressed headers, then
-  // the body.  For later QUIC versions, the headers will be delivered via
-  // OnStreamHeaders, and only the data will be delivered through this method.
+  // Overridden by subclasses to process data.  The headers will be delivered
+  // via OnStreamHeaders, so only data will be delivered through this method.
   virtual uint32 ProcessData(const char* data, uint32 data_len) = 0;
 
   // Called by the session when decompressed headers data is received
-  // for this stream.  Only called for versions greater than QUIC_VERSION_12.
+  // for this stream.
   // May be called multiple times, with each call providing additional headers
   // data until OnStreamHeadersComplete is called.
   virtual void OnStreamHeaders(base::StringPiece headers_data);
 
   // Called by the session when headers with a priority have been received
   // for this stream.  This method will only be called for server streams.
   virtual void OnStreamHeadersPriority(QuicPriority priority);
 
   // Called by the session when decompressed headers have been completely
   // delilvered to this stream.  If |fin| is true, then this stream
   // should be closed; no more data will be sent by the peer.
-  // Only called for versions greater than QUIC_VERSION_12.
   virtual void OnStreamHeadersComplete(bool fin, size_t frame_len);
 
   // Writes the headers contained in |header_block| to the dedicated
   // headers stream.
   virtual size_t WriteHeaders(const SpdyHeaderBlock& header_block,
                               bool fin);
 
   // This block of functions wraps the sequencer's functions of the same
   // name.  These methods return uncompressed data until that has
   // been fully processed.  Then they simply delegate to the sequencer.
   virtual size_t Readv(const struct iovec* iov, size_t iov_len);
   virtual int GetReadableRegions(iovec* iov, size_t iov_len);
   // Returns true when all data has been read from the peer, including the fin.
   virtual bool IsDoneReading() const;
   virtual bool HasBytesToRead() const;
 
-  // Called by the session when a decompression blocked stream
-  // becomes unblocked.
-  virtual void OnDecompressorAvailable();
-
   void set_visitor(Visitor* visitor) { visitor_ = visitor; }
 
   bool headers_decompressed() const { return headers_decompressed_; }
 
   const IPEndPoint& GetPeerAddress();
 
-  QuicSpdyCompressor* compressor();
-
   // Gets the SSL connection information.
   bool GetSSLInfo(SSLInfo* ssl_info);
 
   // Adjust flow control windows according to new offset in |frame|.
   void OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame);
 
  protected:
   // Sets priority_ to priority.  This should only be called before bytes are
   // written to the server.
   void set_priority(QuicPriority priority);
   // This is protected because external classes should use EffectivePriority
   // instead.
   QuicPriority priority() const { return priority_; }
 
  private:
   friend class test::QuicDataStreamPeer;
   friend class test::ReliableQuicStreamPeer;
   friend class QuicStreamUtils;
 
-  // Processes raw stream data for QUIC_VERSION_12 and earlier.
-  uint32 ProcessRawData12(const char* data, uint32 data_len);
-
   uint32 ProcessHeaderData();
 
-  uint32 StripPriorityAndHeaderId(const char* data, uint32 data_len);
-
   bool FinishedReadingHeaders();
 
   Visitor* visitor_;
   // True if the headers have been completely decompresssed.
   bool headers_decompressed_;
   // The priority of the stream, once parsed.
   QuicPriority priority_;
-  // ID of the header block sent by the peer, once parsed.
-  QuicHeaderId headers_id_;
-  // Buffer into which we write bytes from priority_ and headers_id_
-  // until each is fully parsed.
-  string headers_id_and_priority_buffer_;
   // Contains a copy of the decompressed headers until they are consumed
   // via ProcessData or Readv.
   string decompressed_headers_;
   // True if an error was encountered during decompression.
   bool decompression_failed_;
   // True if the priority has been read, false otherwise.
   bool priority_parsed_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicDataStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_DATA_STREAM_H_