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, 30 insertions, 7 deletions

diff --git a/src/network/access/qhttpnetworkconnection_p.h b/src/network/access/qhttpnetworkconnection_p.h
index 526326c3fd..9d4257e217 100644
--- a/src/network/access/qhttpnetworkconnection_p.h
+++ b/src/network/access/qhttpnetworkconnection_p.h
@@ -94,12 +94,27 @@ class Q_AUTOTEST_EXPORT QHttpNetworkConnection : public QObject
     Q_OBJECT
 public:
 
+    enum ConnectionType {
+        ConnectionTypeHTTP,
+        ConnectionTypeSPDY
+    };
+
 #ifndef QT_NO_BEARERMANAGEMENT
-    explicit QHttpNetworkConnection(const QString &hostName, quint16 port = 80, bool encrypt = false, QObject *parent = 0, QSharedPointer<QNetworkSession> networkSession = QSharedPointer<QNetworkSession>());
-    QHttpNetworkConnection(quint16 channelCount, const QString &hostName, quint16 port = 80, bool encrypt = false, QObject *parent = 0, QSharedPointer<QNetworkSession> networkSession = QSharedPointer<QNetworkSession>());
+    explicit QHttpNetworkConnection(const QString &hostName, quint16 port = 80, bool encrypt = false,
+                                    ConnectionType connectionType = ConnectionTypeHTTP,
+                                    QObject *parent = 0, QSharedPointer<QNetworkSession> networkSession
+                                    = QSharedPointer<QNetworkSession>());
+    QHttpNetworkConnection(quint16 channelCount, const QString &hostName, quint16 port = 80,
+                           bool encrypt = false, QObject *parent = 0,
+                           QSharedPointer<QNetworkSession> networkSession = QSharedPointer<QNetworkSession>(),
+                           ConnectionType connectionType = ConnectionTypeHTTP);
 #else
-    explicit QHttpNetworkConnection(const QString &hostName, quint16 port = 80, bool encrypt = false, QObject *parent = 0);
-    QHttpNetworkConnection(quint16 channelCount, const QString &hostName, quint16 port = 80, bool encrypt = false, QObject *parent = 0);
+    explicit QHttpNetworkConnection(const QString &hostName, quint16 port = 80, bool encrypt = false,
+                                    QObject *parent = 0,
+                                    ConnectionType connectionType = ConnectionTypeHTTP);
+    QHttpNetworkConnection(quint16 channelCount, const QString &hostName, quint16 port = 80,
+                           bool encrypt = false, QObject *parent = 0,
+                           ConnectionType connectionType = ConnectionTypeHTTP);
 #endif
     ~QHttpNetworkConnection();
 
@@ -123,6 +138,9 @@ public:
 
     QHttpNetworkConnectionChannel *channels() const;
 
+    ConnectionType connectionType();
+    void setConnectionType(ConnectionType type);
+
 #ifndef QT_NO_SSL
     void setSslConfiguration(const QSslConfiguration &config);
     void ignoreSslErrors(int channel = -1);
@@ -140,6 +158,7 @@ private:
     friend class QHttpNetworkReplyPrivate;
     friend class QHttpNetworkConnectionChannel;
     friend class QHttpProtocolHandler;
+    friend class QSpdyProtocolHandler;
 
     Q_PRIVATE_SLOT(d_func(), void _q_startNextRequest())
     Q_PRIVATE_SLOT(d_func(), void _q_hostLookupFinished(QHostInfo))
@@ -155,7 +174,7 @@ class QHttpNetworkConnectionPrivate : public QObjectPrivate
 {
     Q_DECLARE_PUBLIC(QHttpNetworkConnection)
 public:
-    static const int defaultChannelCount;
+    static const int defaultHttpChannelCount;
     static const int defaultPipelineLength;
     static const int defaultRePipelineLength;
 
@@ -172,8 +191,10 @@ public:
         IPv4or6
     };
 
-    QHttpNetworkConnectionPrivate(const QString &hostName, quint16 port, bool encrypt);
-    QHttpNetworkConnectionPrivate(quint16 channelCount, const QString &hostName, quint16 port, bool encrypt);
+    QHttpNetworkConnectionPrivate(const QString &hostName, quint16 port, bool encrypt,
+                                  QHttpNetworkConnection::ConnectionType type);
+    QHttpNetworkConnectionPrivate(quint16 channelCount, const QString &hostName, quint16 port, bool encrypt,
+                                  QHttpNetworkConnection::ConnectionType type);
     ~QHttpNetworkConnectionPrivate();
     void init();
 
@@ -245,6 +266,8 @@ public:
 
     int preConnectRequests;
 
+    QHttpNetworkConnection::ConnectionType connectionType;
+
 #ifndef QT_NO_SSL
     QSharedPointer<QSslContext> sslContext;
 #endif