HTTP Events in iRules

If I may add, local variables will exist within the span of a single TCP session. An HTTP request and its corresponding response should always, unless programmatically designed otherwise, exist within a single TCP session. It's even conceivable, albeit not guaranteed, that multiple request/response pairs could exist within a single TCP session, allowing the local variables to span these pairs. Therefore you can usually assume that any variable set in an HTTP request event will be available in the subsequent response event - but you should ALWAYS check for their existent first, as a matter of best practice.