HTTP/2 - make protocol settings configurablev5.10.0-beta3

1. Recently we have updated our receive window size to a larger value.
Unfortunately, this also results in auto-test pumping through
more data, which probably takes more time on CI.
At the moment we do not have any public API on QNAM's level to
customize HTTP/2 parameters (aka 5.10/FF and so on). So we use the fact
that QNAM is QObject and we can set a property on it. This property
is our Http2::ProtocolParameters object that allows us to configure:
- HPACK parameters (in 5.10 - noop)
- session receive window size
- different SETTINGS as described by RFC 7540, 6.5.2.

2. Undocumented environment variable to set ENABLE_PUSH is not needed
anymore.
3. In 5.11 Http2::ProtocolParameter will become a public API
and we'll introduce a new setter in QNAM.

Change-Id: If08fd5e09e7c0b61cf9700b426b60b5837b6b2e6
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/network/access/qhttpnetworkconnection.cpp b/src/network/access/qhttpnetworkconnection.cpp
index 0b474ba116..e6a15ccfc4 100644
--- a/src/network/access/qhttpnetworkconnection.cpp
+++ b/src/network/access/qhttpnetworkconnection.cpp
@@ -1437,6 +1437,23 @@ void QHttpNetworkConnection::setConnectionType(ConnectionType type)
     d->connectionType = type;
 }
 
+Http2::ProtocolParameters QHttpNetworkConnection::http2Parameters() const
+{
+    Q_D(const QHttpNetworkConnection);
+    return d->http2Parameters;
+}
+
+void QHttpNetworkConnection::setHttp2Parameters(const Http2::ProtocolParameters &params)
+{
+    Q_D(QHttpNetworkConnection);
+    if (params.validate()) {
+        d->http2Parameters = params;
+    } else {
+        qCWarning(QT_HTTP2)
+            << "invalid HTTP/2 parameters, falling back to defaults instead";
+    }
+}
+
 // SSL support below
 #ifndef QT_NO_SSL
 void QHttpNetworkConnection::setSslConfiguration(const QSslConfiguration &config)