path: root/src/network/access/http2/http2protocol_p.h
diff options
Diffstat (limited to 'src/network/access/http2/http2protocol_p.h')
1 files changed, 12 insertions, 2 deletions
diff --git a/src/network/access/http2/http2protocol_p.h b/src/network/access/http2/http2protocol_p.h
index b26ff0e9f4..c64e960002 100644
--- a/src/network/access/http2/http2protocol_p.h
+++ b/src/network/access/http2/http2protocol_p.h
@@ -129,10 +129,20 @@ enum Http2PredefinedParameters
maxConcurrentStreams = 100 // HTTP/2, 6.5.2
-// It's int, it has internal linkage, it's ok to have it in headers -
-// no ODR violation is possible.
+// These are ints, const, they have internal linkage, it's ok to have them in
+// headers - no ODR violation.
const quint32 lastValidStreamID((quint32(1) << 31) - 1); // HTTP/2, 5.1.1
+// The default size of 64K is too small and limiting: if we use it, we end up
+// sending WINDOW_UPDATE frames on a stream/session all the time, for each
+// 2 DATE frames of size 16K (also default) we'll send a WINDOW_UPDATE frame
+// for a given stream and have a download speed order of magnitude lower than
+// our own HTTP/1.1 protocol handler. We choose a bigger window size (normally,
+// HTTP/2 servers are not afraid to immediately set it to possible max anyway)
+// and split this window size between our concurrent streams.
+const qint32 initialSessionReceiveWindowSize = defaultSessionWindowSize * 10000;
+const qint32 initialStreamReceiveWindowSize = initialSessionReceiveWindowSize / maxConcurrentStreams;
extern const Q_AUTOTEST_EXPORT char Http2clientPreface[clientPrefaceLength];
void prepare_for_protocol_upgrade(QHttpNetworkRequest &request);