“Squid”:http://www.squid-cache.org is a popular and full featured proxy cache.

We have created a small patch for Squid which adds support for extended cache control directives (x-always-cache and x-cache-key) that are designed for use with farms of web crawlers for which extremely aggressive caching is appropriate. Essentially, these directives give the client total control over the lifetime and naming of pages in the cache.

This patch is being submitted for consideration to be incorporated into the main Squid code base, but in the meanwhile we are making it available for general download.

“Read More”:/blog/projects/squid-enhancements