network: add support for the SPDY protocol

Currently the only supported SPDY version is 3.0.

The feature needs to be enabled explicitly via
QNetworkRequest::SpdyAllowedAttribute. Whether SPDY actually was used
can be determined via QNetworkRequest::SpdyWasUsedAttribute from a
QNetworkReply once it has been started (i.e. after the encrypted()
signal has been received). Whether SPDY can be used will be
determined during the SSL handshake through the TLS NPN extension
(see separate commit).

The following things from SPDY have not been enabled currently:
* server push is not implemented, it has never been seen in the wild;
  in that case we just reject a stream pushed by the server, which is
  legit.
* settings are not persisted across SPDY sessions. In practice this
  means that the server sends a small message upon session start
  telling us e.g. the number of concurrent connections.
* SSL client certificates are not supported.

Task-number: QTBUG-18714

[ChangeLog][QtNetwork] Added support for the SPDY protocol (version
3.0).

Change-Id: I81bbe0495c24ed84e9cf8af3a9dbd63ca1e93d0d
Reviewed-by: Richard J. Moore <rich@kde.org>

1 files changed, 15 insertions, 1 deletions

diff --git a/src/network/access/qhttpnetworkreply_p.h b/src/network/access/qhttpnetworkreply_p.h
index 583c3e426f..e15ace0072 100644
--- a/src/network/access/qhttpnetworkreply_p.h
+++ b/src/network/access/qhttpnetworkreply_p.h
@@ -132,6 +132,8 @@ public:
     bool isFinished() const;
 
     bool isPipeliningUsed() const;
+    bool isSpdyUsed() const;
+    void setSpdyWasUsed(bool spdy);
 
     QHttpNetworkConnection* connection();
 
@@ -165,6 +167,7 @@ private:
     friend class QHttpNetworkConnectionPrivate;
     friend class QHttpNetworkConnectionChannel;
     friend class QHttpProtocolHandler;
+    friend class QSpdyProtocolHandler;
 };
 
 
@@ -205,7 +208,11 @@ public:
         ReadingStatusState,
         ReadingHeaderState,
         ReadingDataState,
-        AllDoneState
+        AllDoneState,
+        SPDYSYNSent,
+        SPDYUploading,
+        SPDYHalfClosed,
+        SPDYClosed
     } state;
 
     QHttpNetworkRequest request;
@@ -226,6 +233,11 @@ public:
     qint64 currentChunkSize;
     qint64 currentChunkRead;
     qint64 readBufferMaxSize;
+    qint32 windowSizeDownload; // only for SPDY
+    qint32 windowSizeUpload; // only for SPDY
+    qint32 currentlyReceivedDataInWindow; // only for SPDY
+    qint32 currentlyUploadedDataInWindow; // only for SPDY
+    qint64 totallyUploadedData; // only for SPDY
     QPointer<QHttpNetworkConnection> connection;
     QPointer<QHttpNetworkConnectionChannel> connectionChannel;
 
@@ -236,12 +248,14 @@ public:
     bool requestIsPrepared;
 
     bool pipeliningUsed;
+    bool spdyUsed;
     bool downstreamLimited;
 
     char* userProvidedDownloadBuffer;
 
 #ifndef QT_NO_COMPRESS
     z_stream_s *inflateStrm;
+    int initializeInflateStream();
     qint64 uncompressBodyData(QByteDataBuffer *in, QByteDataBuffer *out);
 #endif
 };