Move http resume code into http backend.

Adds two new virtual functions to QNetworkAccessBackend:

bool canResume() const; and
void setResumeOffset(quint64)

canResume() is used to query the existing backend if resuming is
supported for the current request.

setResumeOffset() is used to set an additional offset which should be
applied when the backend posts the request.

The default implementation of canResume() returns false (resuming not
supported). The default implementation of setResumeOffset() does
nothing.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/network/access/qnetworkaccesshttpbackend_p.h b/src/network/access/qnetworkaccesshttpbackend_p.h
index 0eaf003..e5cc0ab 100644
--- a/src/network/access/qnetworkaccesshttpbackend_p.h
+++ b/src/network/access/qnetworkaccesshttpbackend_p.h
@@ -99,6 +99,9 @@ public:
     // we return true since HTTP needs to send PUT/POST data again after having authenticated
     bool needsResetableUploadData() { return true; }
 
+    bool canResume() const;
+    void setResumeOffset(quint64 offset);
+
 private slots:
     void replyReadyRead();
     void replyFinished();
@@ -120,6 +123,8 @@ private:
     QList<QSslError> pendingIgnoreSslErrorsList;
 #endif
 
+    quint64 resumeOffset;
+
     void disconnectFromHttp();
     void setupConnection();
     void validateCache(QHttpNetworkRequest &httpRequest, bool &loadedFromCache);