# Proxy\_cache\_key **URL:** \ **Category:** NGINX\ **Created:** [March 7, 2010, 12:55pm UTC](https://www.ruby-forum.com/t/proxy-cache-key/184724 "2010-03-07T12:55:46Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![jhauser](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e56c9b/32.png) [@jhauser](https://www.ruby-forum.com/u/jhauser)\ **Post date:** [March 7, 2010, 12:55pm UTC](https://www.ruby-forum.com/t/proxy-cache-key/184724/1 "2010-03-07T12:55:46Z")
Hello, I want to generate the file path of proxy cached data from the proxy\_cache\_key variable. Is there some pseudo-code to generate the same hash as nginx does internally? Or would it be possible to make the generated cache\_key available as a loggable variable? With regards, \_\_Janko ---
**Author:** ![jhauser](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e56c9b/32.png) [@jhauser](https://www.ruby-forum.com/u/jhauser)\ **Post date:** [March 25, 2010, 3:15pm UTC](https://www.ruby-forum.com/t/proxy-cache-key/184724/2 "2010-03-25T15:15:26Z")
The documentation for the proxy\_cache\_path directive of the NginxHttpProxyModule states that the “Key and filename in cache is md5 of proxied URL”. Here is an example: a user requests: [Foo.com](http://nginx.foo.com/bar.html) nginx has the proxy\_pass directive: proxy\_pass [http://apache.foo.com/](http://apache.foo.com/) the cached filename will be the md5 of: [Foo.com](http://apache.foo.com/bar.html) This worked for me when using the default proxy\_cache\_key with nginx 0.7.62 Posted at Nginx Forum: > **[Re: proxy\_cache\_key](https://forum.nginx.org/read.php?2,61057,67641#msg-67641)** > > Hello, I want to generate the file path of proxy cached data from the proxy\_cache\_key variable. Is there some pseudo-code to generate the same hash as nginx does internally? Or would it be possible to make the generated cache\_key available as a...