The Tor Browser: comparison netwerk/protocol/http/SpdyStream31.h

--1:000000000000
+:cad7b057cf2b
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef mozilla_net_SpdyStream31_h
+#define mozilla_net_SpdyStream31_h
+#include "mozilla/Attributes.h"
+#include "nsAHttpTransaction.h"
+namespace mozilla { namespace net {
+class SpdyStream31 : public nsAHttpSegmentReader
+, public nsAHttpSegmentWriter
+{
+public:
+NS_DECL_NSAHTTPSEGMENTREADER
+NS_DECL_NSAHTTPSEGMENTWRITER
+SpdyStream31(nsAHttpTransaction *, SpdySession31 *, int32_t);
+uint32_t StreamID() { return mStreamID; }
+SpdyPushedStream31 *PushSource() { return mPushSource; }
+virtual nsresult ReadSegments(nsAHttpSegmentReader *,  uint32_t, uint32_t *);
+virtual nsresult WriteSegments(nsAHttpSegmentWriter *, uint32_t, uint32_t *);
+virtual bool DeferCleanupOnSuccess() { return false; }
+const nsAFlatCString &Origin()   const { return mOrigin; }
+bool RequestBlockedOnRead()
+{
+return static_cast<bool>(mRequestBlockedOnRead);
+}
+// returns false if called more than once
+bool GetFullyOpen() {return mFullyOpen;}
+void SetFullyOpen()
+{
+MOZ_ASSERT(!mFullyOpen);
+mFullyOpen = 1;
+}
+bool HasRegisteredID() { return mStreamID != 0; }
+nsAHttpTransaction *Transaction() { return mTransaction; }
+virtual nsILoadGroupConnectionInfo *LoadGroupConnectionInfo()
+{
+return mTransaction ? mTransaction->LoadGroupConnectionInfo() : nullptr;
+}
+void Close(nsresult reason);
+void SetRecvdFin(bool aStatus) { mRecvdFin = aStatus ? 1 : 0; }
+bool RecvdFin() { return mRecvdFin; }
+void SetRecvdData(bool aStatus) { mReceivedData = aStatus ? 1 : 0; }
+bool RecvdData() { return mReceivedData; }
+void UpdateTransportSendEvents(uint32_t count);
+void UpdateTransportReadEvents(uint32_t count);
+// The zlib header compression dictionary defined by SPDY.
+static const unsigned char kDictionary[1423];
+nsresult Uncompress(z_stream *, char *, uint32_t);
+nsresult ConvertHeaders(nsACString &);
+void UpdateRemoteWindow(int32_t delta);
+int64_t RemoteWindow() { return mRemoteWindow; }
+void DecrementLocalWindow(uint32_t delta) {
+mLocalWindow -= delta;
+mLocalUnacked += delta;
+}
+void IncrementLocalWindow(uint32_t delta) {
+mLocalWindow += delta;
+mLocalUnacked -= delta;
+}
+uint64_t LocalUnAcked() { return mLocalUnacked; }
+int64_t  LocalWindow()  { return mLocalWindow; }
+bool     BlockedOnRwin() { return mBlockedOnRwin; }
+// A pull stream has an implicit sink, a pushed stream has a sink
+// once it is matched to a pull stream.
+virtual bool HasSink() { return true; }
+virtual ~SpdyStream31();
+protected:
+nsresult FindHeader(nsCString, nsDependentCSubstring &);
+static void CreatePushHashKey(const nsCString &scheme,
+const nsCString &hostHeader,
+uint64_t serial,
+const nsCSubstring &pathInfo,
+nsCString &outOrigin,
+nsCString &outKey);
+enum stateType {
+GENERATING_SYN_STREAM,
+GENERATING_REQUEST_BODY,
+SENDING_REQUEST_BODY,
+SENDING_FIN_STREAM,
+UPSTREAM_COMPLETE
+};
+uint32_t mStreamID;
+// The session that this stream is a subset of
+SpdySession31 *mSession;
+nsCString     mOrigin;
+// Each stream goes from syn_stream to upstream_complete, perhaps
+// looping on multiple instances of generating_request_body and
+// sending_request_body for each SPDY chunk in the upload.
+enum stateType mUpstreamState;
+// Flag is set when all http request headers have been read and ID is stable
+uint32_t                     mSynFrameComplete     : 1;
+// Flag is set when a FIN has been placed on a data or syn packet
+// (i.e after the client has closed)
+uint32_t                     mSentFinOnData        : 1;
+void     ChangeState(enum stateType);
+private:
+friend class nsAutoPtr<SpdyStream31>;
+static PLDHashOperator hdrHashEnumerate(const nsACString &,
+nsAutoPtr<nsCString> &,
+void *);
+nsresult ParseHttpRequestHeaders(const char *, uint32_t, uint32_t *);
+void     AdjustInitialWindow();
+nsresult TransmitFrame(const char *, uint32_t *, bool forceCommitment);
+void     GenerateDataFrameHeader(uint32_t, bool);
+void     CompressToFrame(const nsACString &);
+void     CompressToFrame(const nsACString *);
+void     CompressToFrame(const char *, uint32_t);
+void     CompressToFrame(uint32_t);
+void     CompressFlushFrame();
+void     ExecuteCompress(uint32_t);
+// The underlying HTTP transaction. This pointer is used as the key
+// in the SpdySession31 mStreamTransactionHash so it is important to
+// keep a reference to it as long as this stream is a member of that hash.
+// (i.e. don't change it or release it after it is set in the ctor).
+nsRefPtr<nsAHttpTransaction> mTransaction;
+// The underlying socket transport object is needed to propogate some events
+nsISocketTransport         *mSocketTransport;
+// These are temporary state variables to hold the argument to
+// Read/WriteSegments so it can be accessed by On(read/write)segment
+// further up the stack.
+nsAHttpSegmentReader        *mSegmentReader;
+nsAHttpSegmentWriter        *mSegmentWriter;
+// The quanta upstream data frames are chopped into
+uint32_t                    mChunkSize;
+// Flag is set when the HTTP processor has more data to send
+// but has blocked in doing so.
+uint32_t                     mRequestBlockedOnRead : 1;
+// Flag is set after the response frame bearing the fin bit has
+// been processed. (i.e. after the server has closed).
+uint32_t                     mRecvdFin             : 1;
+// Flag is set after syn reply received
+uint32_t                     mFullyOpen            : 1;
+// Flag is set after the WAITING_FOR Transport event has been generated
+uint32_t                     mSentWaitingFor       : 1;
+// Flag is set after 1st DATA frame has been passed to stream, after
+// which additional HEADERS data is invalid
+uint32_t                     mReceivedData         : 1;
+// Flag is set after TCP send autotuning has been disabled
+uint32_t                     mSetTCPSocketBuffer   : 1;
+// The InlineFrame and associated data is used for composing control
+// frames and data frame headers.
+nsAutoArrayPtr<uint8_t>      mTxInlineFrame;
+uint32_t                     mTxInlineFrameSize;
+uint32_t                     mTxInlineFrameUsed;
+// mTxStreamFrameSize tracks the progress of
+// transmitting a request body data frame. The data frame itself
+// is never copied into the spdy layer.
+uint32_t                     mTxStreamFrameSize;
+// Compression context and buffer for request header compression.
+// This is a copy of SpdySession31::mUpstreamZlib because it needs
+//  to remain the same in all streams of a session.
+z_stream                     *mZlib;
+nsCString                    mFlatHttpRequestHeaders;
+// These are used for decompressing downstream spdy response headers
+uint32_t             mDecompressBufferSize;
+uint32_t             mDecompressBufferUsed;
+uint32_t             mDecompressedBytes;
+nsAutoArrayPtr<char> mDecompressBuffer;
+// Track the content-length of a request body so that we can
+// place the fin flag on the last data packet instead of waiting
+// for a stream closed indication. Relying on stream close results
+// in an extra 0-length runt packet and seems to have some interop
+// problems with the google servers.
+int64_t                      mRequestBodyLenRemaining;
+// based on nsISupportsPriority definitions
+int32_t                      mPriority;
+// mLocalWindow, mRemoteWindow, and mLocalUnacked are for flow control.
+// *window are signed because the race conditions in asynchronous SETTINGS
+// messages can force them temporarily negative.
+// LocalWindow is how much data the server will send without getting a
+//   window update
+int64_t                      mLocalWindow;
+// RemoteWindow is how much data the client is allowed to send without
+//   getting a window update
+int64_t                      mRemoteWindow;
+// LocalUnacked is the number of bytes received by the client but not
+//   yet reflected in a window update. Sending that update will increment
+//   LocalWindow
+uint64_t                     mLocalUnacked;
+// True when sending is suspended becuase the remote flow control window is
+//   <= 0
+bool                         mBlockedOnRwin;
+// For Progress Events
+uint64_t                     mTotalSent;
+uint64_t                     mTotalRead;
+// For SpdyPush
+SpdyPushedStream31 *mPushSource;
+};
+}} // namespace mozilla::net
+#endif // mozilla_net_SpdyStream31_h

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comparison: netwerk/protocol/http/SpdyStream31.h

netwerk/protocol/http/SpdyStream31.h