I have been playing with the proxy cache capabilities in Resin 3.1.6 pro lately. By the description, proxy cache seem incredibly powerful, but I have confusion implementing the proxy cache in certain cases.
I have two main use cases for the proxy cache. One appears to works, and the other doesn't. The one that appears to work: I have an image serving php script, that takes an image from the filesystem, resized it based on a url parameter, and then pipes the data out for the http request. The script is called like this: hostname/albumArt.php?imageName=abc&size=50 That last parameter, "50" resizes the image to 50x50 pixels. This script allows me to resize images dynamically for my webpages as the layout dictates, and helps avoid crummy browser resizing from occurring. But, as you can imagine, 90% of the time, the same image size is called and the albumArt.php url is identical. This seemed like a prime candidate for proxy caching, even without the url being dynamic (having ? and & in it). So I tried it, by adding Expire headers in my albumArt.php script, and adding this line to my resin.conf file: <cache-mapping url-pattern="*albumId*size*" expires="99999s"/> I also turned on cache logging, and everything seems to work! I see the log output "caching /albumArt.php?image=292&size50", soon followed by a message like "using cache: /albumArt.php?image=292&size50" So far, so good, and I've apparently helped resin avoid doing a file system read on these images in the case that they reside in proxy cache memory. The one that does not work: So I decided to try the same trick on an rss feed I create via an php script. The goal here would be turning a dynamic feed into basically a static feed, and avoiding making multiple database calls for the instances where the rss page was returned from a cache hit. I added the same Expire headers to the rss.php script, and added a similar cache-mapping parameter in the resin.conf file: <cache-mapping url-pattern="*rss.php*" expires="99999s"/> However, this time resin does not log that the rss.php url is getting cached. I'm at a loss for why the proxy cache would work in the albumArt.php case, but not the rss.php case. Any ideas? regards, spg _______________________________________________ resin-interest mailing list resin-interest@caucho.com http://maillist.caucho.com/mailman/listinfo/resin-interest