Reiner Saddey’s Place

WP-Cache 2.1 revisited: Have x-gzip and gzip compression share same cache slot

Posted on April 10th, 2007 by Reiner.
Categories: English, Computers.

While working on the 304 not modified case that causes excessive traffic for RSS feeds, I encountered a mild weakness within the compression code, that causes both gzip and x-gzip variants of a particular page to use separate cache slots (i.e. two separate files). That’s quite redundant, as x-gzip is just a lagacy term to invoke gzip processing and both x-gzip and gzip produce identical contents. 

Now, only a single cache slot is being used for both and the value of the Content-Encoding header (either gzip or x-gzip) is no longer cached, but instead derived from the current request being served. 

There’s no code here, as it will be included within the 304 not modified version.

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