ChrisW67,
Thanks for your reply. I was going through issues related to https and ssl etc and found this:
http://www.qtcentre.org/threads/2452...kReply-and-SSL

I think i am hitting same issue.

Is there any bug or issue similar to above in qt 5.3.1.

Above issue is easily reproducible in qt 5.3.1 with sample application, enabled proxy and 'https' upload site.