Update QTBUG-17223 for Qt 4.8

In Qt 4.7, http network requests are assigned to http connection
channels before connecting the channel.
In Qt 4.8, channels are connected "blind" as this gives a performance
improvement in certain circumstances.

On the assumption that User-Agent should be the same for all the
requests being sent to the server in a given burst, we use the first
queued request to set the user agent for a http proxy.

Task-number: QTBUG-17223
Reviewed-by: Markus Goetz
Reviewed-by: Martin Petersson

1 files changed, 9 insertions, 0 deletions

diff --git a/src/network/access/qhttpnetworkconnection.cpp b/src/network/access/qhttpnetworkconnection.cpp
index 83156c6..478bef0 100644
--- a/src/network/access/qhttpnetworkconnection.cpp
+++ b/src/network/access/qhttpnetworkconnection.cpp
@@ -520,6 +520,15 @@ bool QHttpNetworkConnectionPrivate::dequeueRequest(QAbstractSocket *socket)
     return false;
 }
 
+QHttpNetworkRequest QHttpNetworkConnectionPrivate::predictNextRequest()
+{
+    if (!highPriorityQueue.isEmpty())
+        return highPriorityQueue.last().first;
+    if (!lowPriorityQueue.isEmpty())
+        return lowPriorityQueue.last().first;
+    return QHttpNetworkRequest();
+}
+
 // this is called from _q_startNextRequest and when a request has been sent down a socket from the channel
 void QHttpNetworkConnectionPrivate::fillPipeline(QAbstractSocket *socket)
 {