I had a look through Enterprise_PageCache_Model_Processor::extractContent()
to see how it determines the cache key for each page that it caches, but it's pretty complicated and there doesn't seem to be a simple way to determine the cache key for a given URL in order to remove it from the cache…?
Magento Enterprise – How to Flush a Specific URL from Full Page Cache
full-page-cache
Best Answer
My guess (you didn't state the reason or use case for clearing a specific URL) would be to try to approach it by clearing the cache by tags. You could register an event at some point before the script terminates and call
Mage::getSingleton('enterprise_pagecache/processor')->addRequestTag()
.As you stated, the cache ID logic includes request and application environment information. You could poke around the
Enterprise_PageCache_Model_Processor::_createRequestIds
andEnterprise_PageCache_Model_Processor::_getFullPageUrl
methods for more details on how they work.