Using std.net.curl

[David Anderson via Digitalmars-d-learn]

I'm working with std.net.curl. Using curl on the command line I 
can do this:

    curl -T file.txt http://localhost:9998/tika
and it returns text as a result.

When I attempt to do the same thing in D code as follows:

    import std.net.curl;
    upload("file.txt", "http://localhost:9998/tika";);

the text is written to standard out.

I want to capture that text in a variable, but the upload 
function returns void. How can I get the text returned by the web 
server to be stored in a variable?