Mongrel users - Sep 2010 - how to i force apche to handle download request

hii all, Am running apche as frontend to mongrel ,i added these line in
Apache''s httpd.conf file

LoadModule rewrite_module modules/mod_rewrite.so

LoadModule proxy_module modules/mod_proxy.so

LoadModule proxy_balancer_module modules/mod_proxy_balancer.so

LoadModule proxy_http_module modules/mod_proxy_http.so

LoadModule xsendfile_module modules/mod_xsendfile.so

XSendFile on

XsendFileAllowAbove on

<VirtualHost *:80>

ServerName src

DocumentRoot  C:/InstantRails-2.0-win/rails_apps/src/public/

ProxyPass / http://localhost:3000/

ProxyPassReverse / http://localhost:3000
</VirtualHost>

Now in my application i have to downlaod large stream and i don''t want
rails to serve it,i would like apache to server this request but with
current setting rail i serving this request.

this is my code for download

filename = "#{@stream.location}"

response.headers[''Content-Type''] =
"application/force-download"

response.headers[''Content-Disposition''] = "attachment;
filename=\"#{File.basename(filename)}\""

response.headers["X-Sendfile"] = filename

response.headers[''Content-length''] = File.size(filename)

render :nothing => true

with current setting am able to downlaod files of 1.1. gb only once to
download it again i have to restart both mongrel and apache...
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