RFR: 8235459: HttpRequest.BodyPublishers#ofFile(Path) assumes the default file system

[Chris Hegarty]

Julia,

> On 5 Mar 2020, at 13:50, Julia Boes <julia.boes at oracle.com> wrote:
> 
> Hi,
> 
> Please see this fix that adds support for non-default file systems to the HttpClient. More specifically, the change is in RequestPublishers.FilePublisher where an UnsupportedOperationException is thrown if a java.io.File cannot be obtained. The exception is now caught and a function is used to obtain an InputStream with a privileged scope based on the captured AccessControlContext.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8235459
> 
> CSR: https://bugs.openjdk.java.net/browse/JDK-8240526

I added myself as reviewer.

> Webrev: http://cr.openjdk.java.net/~jboes/webrevs/8235459/webrev.01/

The change looks good, and the tests appear comprehensive.

-Chris.