sending binary data to a File

I want to use a ruby cgi script to make an image. (Actually, make an
image based on things from a database and query params)

I am making a png image with rcairo (ruby cairo bindings). If I give it
a File stream or $stdout from the command line it will happily write the
binary png image to either.

In mod_ruby it doesn't like $stdout, thinking that its an
Apache::Request. It doesn't like request.output_buffer as its a String.

Short of saving the file and then re reading it in using
request.send_fd(), is there any way to get rcairo and mod_ruby talking?

Thanks in advance

have fun,

SteveC [email protected] http://www.fractalus.com/steve/