1 files changed, 33 insertions, 0 deletions
diff --git a/src/network/access/qnetworkaccessbackend.cpp b/src/network/access/qnetworkaccessbackend.cpp
index 34d576a..1fcfebb 100644
--- a/src/network/access/qnetworkaccessbackend.cpp
+++ b/src/network/access/qnetworkaccessbackend.cpp
@@ -46,9 +46,11 @@
 #include "qnetworkreply_p.h"
 #include "QtCore/qhash.h"
 #include "QtCore/qmutex.h"
+#include "QtNetwork/qnetworksession.h"
 
 #include "qnetworkaccesscachebackend_p.h"
 #include "qabstractnetworkcache.h"
+#include "qhostinfo.h"
 
 #include "private/qnoncontiguousbytedevice_p.h"
 
@@ -344,4 +346,35 @@ void QNetworkAccessBackend::sslErrors(const QList<QSslError> &errors)
 #endif
 }
 
+/*!
+    Starts the backend.  Returns true if the backend is started.  Returns false if the backend
+    could not be started due to an unopened or roaming session.  The caller should recall this
+    function once the session has been opened or the roaming process has finished.
+*/
+bool QNetworkAccessBackend::start()
+{
+    if (!manager->networkSession) {
+        open();
+        return true;
+    }
+
+    // This is not ideal.
+    const QString host = reply->url.host();
+    if (host == QLatin1String("localhost") ||
+        QHostAddress(host) == QHostAddress::LocalHost ||
+        QHostAddress(host) == QHostAddress::LocalHostIPv6) {
+        // Don't need an open session for localhost access.
+        open();
+        return true;
+    }
+
+    if (manager->networkSession->isOpen() &&
+        manager->networkSession->state() == QNetworkSession::Connected) {
+        open();
+        return true;
+    }
+
+    return false;
+}
+
 QT_END_NAMESPACE