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.
Nope. I suppose if you are also coding the webservice that you are calling you can set a custom header containing the request URL on its response. You can access the response headers from ClientHttpResponse.