This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You can't send two different content types over a single response. You will need two response, which means you will need two different requests (as responses can only be sent after a request was made).