Very long operations with FastCGI

I have a long-running operation to spawn from a perl script within the
FastCGI environment.  I would like the script to cause the user's browser to
redirect to a 'view operation status' page, and continue to do the
processing of the operation in the background.  I see two obvious ways to do
this.  First using the HTTP header 'redirect: [url]' and the other by
writing a page with a meta refresh tag.

Once I have written a redirect command to the user's browser, how do I
signal to the server and the browser that i'm done sending input, so the
server will flush the buffer and deliver the output, and the browser will
acknowledge this session has completed and do it's thing, instead of waiting
for more output from the web server.

Thanks,

/mitch

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