can backend trigger pipe?

[Gaute Amundsen]

Say I have site where an admin page takes a few minutes to complete, and
it outputs text to notify about progress and keep the connection from
timing out.

Lets pretend I only have this one IP and port.

Is there any other way to handle this than to hardcode "pipe" for those
urls in vcl_recv?

Any way for the script to return a header that can tell vcl_fetch to
pipe? Or is that too late?

Am I right to assume that "pass" is not intended to work in a case like
this?

running varnish-2.0.3

Regards
Gaute Amundsen