$request_filename rename in download

[raffo]

Hi, 

I have created a public proxy with nginx but when i download files like
"proxy.*****.com/?url=google.com/images/logo_sm.gif" the filename
"logo_sm.gif" it's not save in browse as the real name but with the
name: "download". 

I need a rewrite rules that rename the filename with $args of url. 
Eg: 
site.tld/?url=proxed.tld/file.zip 

the file.zip will be downloaded as "download" name, not with file.zip
name. So i need a rule that rename the file with another with: 
site.tld/?url=proxed.tld/file.zip&=filename.zip 

This is very easy for who know rewrite of nginx, i searn a lot of
combination but i loss only time..

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,215361,215361#msg-215361